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Name : Asit Kumar Chakraborti

Department : School of Chemical Sciences
Designation : Raja Ramanna Fellow
Contact : +91 33 2473 4971 (Ext:1406)
Email : ocakc@iacs.res.in


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Dr. Asit K. Chakraborti, LFICS, FRSC, FASc, FNA

IACS Emeritus Fellow and DAE Raja Ramanna Fellow,
School of Chemical Sciences,
Indian Association for the Cultivation of Sciences (IACS)
Kolkata, Jadavpur, West Bengal 700 032, India

and
Former Professor and Head, 
Department of Medicinal Chemistry,

National Institute of Pharmaceutical Education and Research (NIPER),
Sector 67, S. A. S. Nagar, Punjab 160 062, India.


Email: ocakc@iacs.res.in; akchakraborti@niper.ac.in; asitkumarchakraborti@gmail.com

Professor Asit K. Chakraborti has been a founder faculty of NIPER, S A S Nagar (Mohali), Punjab, India and had been intimately associated with the development of this pioneering institute of the country in the fields of pharmaceutical education and research. He is currently Raja Ramanna Fellow in the School of Chemical Sciences, IACS, Kolkata. He superannuated as Professor & Head of the Department of Medicinal Chemistry, NIPER- SAS Nagar, in August 2019 and was a Visiting Professor in the Department of Chemistry, IIT Ropar, Punjab before joining IACS as Emeritus Fellow.

He obtained the M. Sc. degree in Organic Chemistry from Burdwan University, West Bengal, India, in 1977, being placed first in the first class and Ph. D. degree in Synthetic Organic Chemistry under the supervision of Prof. Usha Ranjan Ghatak from IACS, Kolkata, India in 1985.

He received post-doctoral research training in the Department of Chemistry, Clemson University, South Carolina, USA during 1985-1987 and Medicinal Chemistry at Purdue University, Indiana, USA during 1987-1989 and after that joined the Department of Chemistry, the University of Burdwan, Burdwan, West Bengal as a faculty in Jan 1990. He moved to the Department of Medicinal Chemistry, NIPER SAS Nagar, as Assistant Professor in Nov 1994, was elevated to Associate Professor in 1999 and Professor & Head in 2001. He has also been the Dean of NIPER S. A. S. Nagar.

Prof. Chakraborti has guided 41 Ph. D. and 130 Masters students, published 181 research papers with > 12,000 citations with an h index of 64. He filed 42 patents of which 27 have been granted. He is among the Top 2% Indian Scientist (Field-Organic Chemistry) in the World Ranking 2022 [Indian Rank: 25; World Rank: 1326] and is one of the Top Chemistry Scientists 2022 [World Rank 3713; National Rank 31].

His research interest in Organic Chemistry include the development of new synthetic methodologies (transition-metal-based catalysis and organo-catalysis, C-H activation etc.) in compliance with the green chemistry principles and deriving novel concepts (understanding the molecular level role of acceleration of organic reactions in water and fluorous alcohols, the origin of the organocatalytic potential of ionic liquids etc.). development of Green or Sustainable Chemistry for Greener synthetic routes to bioactive natural products, cardiovascular drugs, and other biologically active molecules, Development of methodologies for solid/solution phase synthesis of small molecular libraries.

He is also a passionate Medicinal Chemist having focus on the Target-based design and synthesis of new chemical entities in various therapeutic areas of Tropical communicable and neglected diseases like Tuberculosis, Leishmaniasis; Non-communicable diseases like Inflammation, rheumatoid arthritis, asthma, and COPD; Diabetes.

 


Academic Profile

Prof. Asit K. Chakraborti

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Academic Qualifications
  • 1969-1972: Higher Secondary (Science); West Bengal Board of Secondary Education, Calcutta, India. Grade-First Division.
  • 1972-1975: B.Sc. (Chemistry Honours), Bankura Christian College, The University of Burdwan, West Bengal, India. Grade-First Class.
  • 1975-1977: M. Sc. (Chemistry-Organic Special), The University of Burdwan, Grade-First Class. Rank - First in the First Class. Received University Gold Medal for being placed First in the First Class and Bardhaman Sammilani Gold Medal for securing Highest Marks in Chemistry.
  • 1979-1985: Ph. D. (Science), IACS, Jadavpur, Calcutta, West Bengal, India.

Academic Profile
a) Scholarships:
  • 1987 (Nov.)-1989 (Sept.): Postdoctoral Fellowship, Purdue University, Indiana, U. S. A.
  • 1985 (Sept.)-1987 (Oct.): Postdoctoral Fellowship, Clemson University, S. C., U. S. A.
  • 1981 (Feb.)-1985 (Aug.): Senior Research Fellowship during Ph. D. studies in IACS.
  • 1979 (Dec.)-1981: Junior Research Fellowship during Ph. D. studies in IACS.
  • 1975-1977: National Scholarship during Postgraduate studies.
  • 1972-1975: National Loan Scholarship during Undergraduate studies.


b) Professional (Research and Teaching) Experience:

  • 2021 (Sept 01) –                          Emeritus Fellow/Raja Ramanna Fellow, School of Chemical Sciences, IACS, Kolkata, WB, India.
  • 2019 (Nov 01) – 2021 (May 24)   Visiting Professor, Dept of Chemistry, IIT-Ropar, Punjab, India.
  • 2014 (Jul 03) - 2016 (Aug 14)      Dean, NIPER, S. A. S. Nagar, Punjab, India.
  • 2011 (Aug 02) - 2012 (Aug 01)    Associate Dean (Academic affairs), NIPER, Punjab, India.
  • 2001 (Apr 19) – 2019 (Aug 31)    Professor and Head, Dept of Medicinal Chemistry, NIPER, Punjab, India.
  • 1999 (Nov 09) – 2001 (Apr 18)    Associate Professor, Dept of Medicinal Chemistry, NIPER, Punjab, India.
  • 1994 (Nov 09) – 1999 (Nov 08)   Assistant Professor, Dept of Medicinal Chemistry, NIPER, Punjab, India.
  • 1990 (Jan 18) – 1994 (Nov 08)    Senior Lecturer, Dept of Chemistry, Burdwan University, Burdwan, WB, India.
  • 1989 (Oct 03) –1990 (Jan 17)      Scientist Fellow (Quick Hire), Department of Medicinal Chemistry, IICB, Kolkara, WB, India.
  • 1987 (Nov 08) – 1989 (Sept 15)   Postdoctoral Fellow, Purdue University, Indiana, U. S. A.
  • 1985 (Sept 02) – 1987 (Nov 06)   Postdoctoral Fellow, Clemson University, S. C., U. S. A.
  • 1981 (Nov 12) - 1985 (Aug 30)    Senior Research Fellow during Ph. D. studies in IACS.
  • 1979 (Nov 12) - 1981 (Nov 11)    Junior Research Fellow during Ph. D. studies in IACS.

c) Honours, Awards and Appreciations:

  • Fellow, Indian National Science Academy, New Delhi, 2016
  • Fellow of the Indian Academy of Science, Bangalore, 2014
  • Ranbaxy Research Award 2004 (Pharmaceutical Sciences).
  • Indian Society for Mass Spectroscopy (ISMAS) Eminent Mass Spectroscopist Award 2009.
  • Chemical Research Society of India (CRSI) Silver Medal 2022.
  • DAE Raja Ramanna Fellow 2021.
  • Life Fellow, Indian Chemical Society, 2021.
  • INSA Endowment Lecture: Dr. Nitya Anand Endowment Lecture 2021.
  • Chemical Research Society of India (CRSI) Bronze Medal 2006.
  • Fellow, Royal Society of Chemistry, Cambridge, U. K.
  • Indian Chemical Society: Professor P. K. Bose Memorial Award for the year 2019.
  • Certificate of Appreciation for Thesis Advisor of the National level Rajnibhai V. Patel PharmInnova Awardee (Dr. Priyank Purohit) for the most “Innovative Thesis” in Ph.D. (Pharmaceutical Chemistry) category in Pharmaceutical Sciences 2017-18.
  • Certificate of Appreciation for Thesis Advisor of the National level Rajnibhai V. Patel PharmInnova Awardee (Dr. Pradeep Jadhavar) for the most “Innovative Thesis” in Ph. D. (Pharmaceutical Chemistry) category in Pharmaceutical Sciences 2016-17.
  • Certificate of Appreciation for Thesis Advisor of the National level Rajnibhai V. Patel PharmInnova Awardee (Mr. Sahaj Pancholia) for the most “Innovative Thesis” in M. Pharm. (Pharmaceutical Chemistry) category in Pharmaceutical Sciences 2015-16.
  • Certificate of Appreciation for Thesis Advisor of the National level Rajnibhai V. Patel PharmInnova Awardee (Mr. Dhameliya Tejas Manjibhai) for the most “Innovative Thesis” in M. Pharm. (Pharmaceutical Chemistry) category in Pharmaceutical Sciences 2014-15.
  • Certificate of Appreciation for Thesis Advisor of 2012 Eli Lilly and Company Asia Outstanding Thesis Awardee (S Raha Roy).
  • Certificate of Appreciation for Thesis Advisor of 2009 Eli Lilly and Company Asia Outstanding Thesis Awardee (S V Chankeshwara).
  • Certificate of Appreciation for Thesis Advisor of 2009 Eli Lilly and Company Asia Outstanding Thesis Awardee (S Sundriyal).
  • Certificate of Appreciation for Thesis Advisor of 2013 Eli Lilly and Company Asia Outstanding Thesis First Prize Awardee (Dinesh Kumar).
  • Tetrahedron Letters Most Cited Paper 2005-2008 Award.
  • Bioorganic and Medicinal Chemistry Letters Most Cited Paper 2005-2008 Award.
  • Tetrahedron Letters Most Cited Paper 2004-2007 Award.
  • Tetrahedron Letters Most Cited Paper 2003-2006 Award.
  • Member, National Academy of Science, India, Allahabad.
  • University Gold Medal 1977, The University of Burdwan.
  • Bardhaman Sammilani Gold Medal 1977, The University of Burdwan.
cv-prof._asit_k._chakraborti.pdf
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Group


Publication

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        Research Article 180Review Article 4; Book (edited) 1; Book Chapter 4
       Scopus Citation: 10780; Citation per paper 58.58; h-Index 63
       Google Scholar Citation: 11985; Citation per paper 65.13h-Index: 64i10-Index: 163
       Impact Factor (IF) 2021: Cumulative IF: 762.246; Average IF: 4.142
     
World Ranking 2022 of Top 2% Indian Scientist (Field-Organic Chemistry):
       Indian Rank: 25, World Rank: 1326 
 C-score: 3.63763844 Top%: 1.19043344
                                               Top Chemistry Scientist 2022: World Rank 3713; National Rank 31


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Research Articles: Total 180

  1. Tejas M. Dhameliya, Rishu Tiwari, Arkaprabha Banerjee, Sahaj Pancholia, Dharmarajan Sriram, Dulal Panda, and Asit K. Chakraborti,*  “Benzo[d]thiazole-2-carboxamides as New anti-TB Chemotypes Inhibiting Mycobacterial ATP Phosphoribosyl Transferase (HisG),” Future Med. Chem. 2022, 14 (23), Accepted. DOI: https://doi.org/10.4155/fmc-2022-0226. Cited 0 times. IF: 4.767.
  2. Tejas M. Dhameliya, Rishu Tiwari, Kshitij I. Patel, Siva Krishna Vagolu, Dulal Panda, Dharmarajan Sriram, and Asit K. Chakraborti,*  “Bacterial FtsZ Inhibition by Benzo[d]imidazole-2-carboxamide Derivative having anti-TB Activity,” Future Med. Chem. 2022, 14(19), 1361–1373. DOI: https://doi.org/10.4155/fmc-2022-0120. Cited 0 times. IF: 4.767.
  3. Dinesh Kumar, Himanshu Sharma, Nirjhar Saha, and Asit K. Chakraborti,*  “Domino synthesis of functionalized pyridine carboxylates under gallium catalysis: Unravelling the reaction pathway and the role of the nitrogen source counter anion,” Chem Asian J. 2022, 17(15), Article number e202200304, DOI: org/10.1002/asia.202200304. Cited 1 time. IF: 4.839.
  4. Firdoos Ahmad Sofi, Rohit Sharma, Ravi Rawat, Asit K. Chakraborti,* and Prasad V. Bharatam,* “Visible light promoted tandem dehydrogenation-deaminative cyclocondensation under aerobic condition for the synthesis of 2-aryl benzimidazoles/quinoxalines from ortho-phenylenediamines and arylmethyl/ethyl amines,” New J. Chem. 2021, 45, 4569-4573, DOI: 10.1039/D0NJ03002C. Cited 5 times. IF: 3.925.
  5. Bhavin V. Pipaliya, Kapileswar Seth, Asit K. Chakraborti,*  “Ruthenium (II) Catalyzed C(sp2)–H Bond Alkenylation of 2-Arylbenzo[d]oxazole and 2-Arylbenzo[d]thiazole with Unactivated Olefins,” Chem Asian J. 2021, 16, 87–96, DOI: 10.1002/asia.202001304. Cited 9 times. IF: 4.839.
  6. Tejas M. Dhameliya, Kshitij I. Patel, Rishu Tiwari, Siva Krishna Vagolu, Dulal Panda, Dharmarajan Sriram, Asit K. Chakraborti,* “Design, Synthesis, and Biological Evaluation of Benzo[d]imidazole-2-carboxamides as New Anti-TB Agents,” Bioorg. Chem. 2021, 107 Article number 104538. Article reference YBIOO_104538 DOI: doi.org/10.1016/j.bioorg.2020.104538. Cited 18 times. IF: 5.037.
  7. Pradeep S. Jadhavar, Kshitij I. Patel, Tejas M. Dhameliya, Nirjhar Saha, Moulikkumar D. Vaja, Vagolu S. Krishna, Dharmarajan Sriram, Asit K. Chakraborti,* “Benzimidazoquinazolines as new potent anti-TB chemotypes: Design, synthesis, and biological evaluation,” Bioorg. Chem. 2020, 99, Article number 103774. DOI: 10.1016/j.bioorg.2020.103774. Cited 14 times. IF: 5.037.
  8. Dilip Kumar Singh, Archana Sahu, Abid A. Wani, Prasad V. Bharatam, Asit K. Chakraborti, S. Giri, Saranjit Singh, “Characterization of Photodegradation Products of Bepotastine Besilate and In silico Evaluation of Their Physicochemical, Absorption, Distribution, Metabolism, Excretion and Toxicity Properties,” J. Pharma. Sci. 2020, 109, 1883-1895. DOI: 10.1016/j.xphs.2020.03.004. Cited 8 times. IF: 3.534.
  9. Raj Kumar, Nirjhar Saha, Priyank Purohit, Sanjeev K. Garg, Kapileswar Seth, Vachan S. Meena, Sachin Dubey, Khyati Dave, Rohit Goyal, Shyam S. Sharma, Uttam C. Banerjee and Asit K. Chakraborti,* “Cyclic enaminone as new chemotype for selective cyclooxygenase-2 inhibitory, anti-inflammatory, and analgesic activities,” Eur. J. Med. Chem., 2019, 182, Article number 111601. DOI: 10.1016/j.ejmech.2019.111601. Cited 12 times. IF: 7.088.
  10. Firdoos Ahmad Sofi, Rohit Sharma, Asit K. Chakraborti,* and Prasad V. Bharatam,* “Tandem Oxidative Cyclocondensation towards 2,3-Disubstituted Quinazolinones in the Presence of [Bmim][BF4] and Iodine,” Eur. J. Org. Chem., 2019, 5887-5893. DOI: 10.1002/ejoc.201900969. Cited 10 times. IF: 3.261.
  11. Deepika Kathuria, Pankaj Gupta, Sumit S. Chourasiya, Subash C. Sahoo, Uwe Beifuss, Asit K. Chakraborti,* and Prasad V. Bharatam,* “An Unprecedented Intramolecular to Intermolecular Mechanistic Switch in 1,1-Diaminoazines Leading to Differential Product Formation during the I2-Induced Tandem Oxidative Transformation,” Org. Biomol. Chem., 2019, 17, 4129 - 4138. DOI: 10.1039/C9OB00610A. Cited 11 times. IF: 3.890.
  12. Srikant Bhagat, Metheku Supriya, Satish Pathak, Dharmarajan Sriram and Asit K. Chakraborti,* “α-Sulfonamidophosphonates as New Anti-Mycobacterial Chemotypes: Design, Development of Synthetic Methodology, and Biological Evaluation,” Bioorg. Chem., 2019, 82, 246-252. DOI: 10.1016/j.bioorg.2018.09.023. Cited 14 times. IF: 5.037.
  13. Tejas M. Dhameliya, Rishu Tiwari, Arkaprabha Banerjee, Sahaj Pancholia, Dharmarajan Sriram, Dulal Panda, and Asit K. Chakraborti,* “Benzo[d]thiazole-2-carbanilides as New Anti-TB Chemotypes: Design, Synthesis, Biological Evaluation, and Structure-Activity Relationship,” Eur. J. Med. Chem., 2018, 155, 364-380. DOI: 10.1016/j.ejmech.2018.05.049. Cited 34 times. IF: 7.088.
  14. Sumit S. Chourasiya, Aabid Abdullah Wani, C. M. Nagaraja, Asit K. Chakraborti,* and Prasad V. Bharatam,* “N-(Acridin-9-yl)arenesulfonamides: Synthesis, Quantum Chemical Studies and Crystal Structure Analysis to Establish the Tautomeric Preferences,” Tetrahedron, 2018, 74, 3634-3641. DOI: 10.1016/j.tet.2018.05.024. Cited 1 time. IF: 2.388.
  15. Shobhit Kumar Tiwari, Dilip Kumar Singh, Mayurbhai Kathadbhai Ladumor, Asit K. Chakraborti, and Saranjit Singh,* “Study of degradation behaviour of montelukast sodium and its marketed formulation in oxidative and accelerated test conditions and prediction of physicochemical and ADMET properties of its degradation products using ADMET PredictorTM,” J. Pharm. Biomed. Anal., 2018, 158, 106-118. DOI: 10.1016/j.jpba.2018.05.040. Cited 11 times.  IF: 3.935.
  16. Neha Patel, Minhajul Arfeen, Radhika Sood, Sadhika Khullar, Asit K Chakraborti, Sanjay K. Mandal and Prasad V. Bharatam,* “Can Remote N-Heterocyclic Carbenes Coordinate with Main Group Elements? Synthesis, Structure and Quantum Chemical Analysis of N+ Centre Complexes,” Chem. Eur. J., 2018, 24 (24), 6418-6425. DOI: 10.1002/chem.201705999. Cited 18 times. IF: 5.020.
  17. Deepik Kathuria, Sumit S. Chourasiya, Sanjay K. Mandal, Asit K.Chakraborti, Uwe Beifuss, and Prasad V. Bharatam, “Ring-chain isomerism in conjugated guanylhydrazones: Experimental and theoretical study,” Tetrahedron, 2018, 74 (23) 2857-2864. DOI: 10.1016/j.tet.2018.04.042. Cited 10 times. IF: 2.388.
  18. Bhavin V. Pipaliya and Asit K. Chakraborti,* “Ligand-Assisted Heteroaryl C(sp2)-H Bond Activation by Cationic Ruthenium(II) Complex for Alkenylation of Heteroarenes with Alkynes Directed by Bio-relevant Heterocycles,” ChemCatChem, 2017, 9 (22), 4191-4198. DOI: 10.1002/cctc.201701016. Cited 9 times.  IF: 5.497.
  19. Tejas M. Dhameliya, Sumit S. Chourasiya, Eshan Mishra, Pradeep S. Jadhavar, Prasad V. Bharatam and Asit K. Chakraborti,* “Rationalisation of Benzazole-2-carboxylate vs Benzazine-3-one/Benzazine-2,3-dione Selectivity Switch during Cyclocondensation of 2-Amino thiophenols/phenols/anilines with 1,2-Biselectrophiles in Aqueous Medium,” J. Org. Chem., 2017, 82 (19), 10077-10091. DOI: 10.1021/acs.joc.7b01548. Cited 20 times. IF: 4.198.
  20. Priyank Purohit, Kapileswar Seth, Asim Kumar, and Asit K. Chakraborti,*  “C-O Bond Activation by Nickel-Palladium Hetero-Bimetallic Nano-Particles for Suzuki-Miyaura Reaction of Bioactive Heterocycle-Tethered Sterically Hindered Aryl Carbonates,” ACS Catal., 2017, 7 (4), 2452-2457. DOI: 10.1021/acscatal.6b02912. Selected by the Editorial Board of SYNFACTS for its important insights and published the highlights in SYNFACTS 2017, 13(05), 0526. Cited 25 times.  IF: 13.700.
  21. Sumit S. Chourasiya,  Dhara Patel,  C. M. Nagaraja,  Asit K. Chakraborti, and Prasad V. Bharatam, “Sulfonamide vs. Sulfinimide: Tautomerism and Electronic Structure Analysis of N-Heterocyclic Arenesulfonamides,” New J. Chem., 2017, 41 (16), 8118-8129. DOI: 10.1039/C7NJ01353A. Cited 14 times.  IF: 3.925.
  22. Bhavin V. Pipaliya and Asit K. Chakraborti,* * “Cross Dehydrogenative Coupling of Heterocyclic Scaffolds with Unfunctionalised Aroyl Surrogates by Palladium(II) Catalyzed C(sp2)-H Aroylation through Organocatalytic Dioxygen Activation,” J. Org. Chem., 2017, 82 (7), 3767-3780. DOI: 10.1021/acs.joc.7b00226. Cited 31 times.  IF: 4.198.
  23. Shweta Bhagat, Minhajul Arfeen, Legesse Adane, Savita Singh, Prati Pal Singh, Asit K. Chakraborti, Prasad V. Bharatam, “Guanylthiourea derivatives as potential antimalarial agents: Synthesis, in vivo and molecular modelling studies,” Eur. J. Med. Chem. 2017, 135, 339-348. DOI: 10.1016/j.ejmech.2017.04.022. Cited 14 times.  IF: 7.088.
  24. Tarun Handa, Shalu Jhajra, Shweta Bhagat, P. V. Bhartam, Asit K. Chakraborti, Saranjit Singh* “Molecular insight into atypical instability behavior of fixed-dose combination containing amlodipine mesylate and losartan potassium,” J. Pharm. Biomed. Anal., 2017 136, 66–80. DOI: 10.1016/j.jpba.2016.12.035. Cited 5 times.  IF: 3.935.
  25. Babita Tanwar,  Asim Kumar, Perumal Yogeeswari, Dharmarajan Sriram, Asit K. Chakraborti,* “Design, Development of New Synthetic Methodology, and Biological Evaluation of Substituted Quinolines as New Anti-tubercular Leads,” Bioorg. Med. Chem. Lett., 2016, 26 (24), 5960-5966. DOI: 10.1016/j.bmcl.2016.10.082. Cited 35 times.  IF: 2.940.
  26. Minhajul Arfeen, Shweta Bhagat, Rahul Patel, Shivcharan Prasad, Ipsita Roy, Asit K. Chakraborti and Prasad V. Bharatam* “Design, synthesis and biological evaluation of 5-benzylidene-2-iminothiazolidin-4-ones as selective GSK-3β Inhibitors,” Eur. J. Med. Chem., 2016, 121, 727-736. DOI: 10.1016/j.ejmech.2016.04.075. Cited 27 times. IF: 7.088.
  27. Sumit Sunil Chourasiya, Deepika Kathuria, Sampada Sunil Nikam, Ashok Ramakrishnan, Sadhika Khullar, Sanjay K. Mandal,* Asit K. Chakraborti,*  and Prasad V. Bharatam,* “Azine-Hydrazone Tautomerism of Guanylhydrazones: Evidence for the Preference Toward the Azine Tautomer,” J. Org. Chem., 2016, 81 (17), 7574-7583. DOI: 10.1021/acs.joc.6b01258. Cited 30 times.  IF: 4.198.
  28. Kapileswar Seth, Sudipta Raha Roy and Asit K. Chakraborti,* “The palladium and copper contrast: a twist to products of different chemotypes and altered mechanistic pathways,” Catal. Sci. Technol., 2016, 6 (9), 2892–2896. DOI: 10.1039/C6CY00415F. Cited 23 times. IF: 6.177.
  29. Pradeep S. Jadhavar, Tejas M. Dhameliya, Maulikkumar D. Vaja, Dinesh Kumar, Jonnalagadda Padma Sridevi, Perumal Yogeshwari, Dharmarajan Sriram and Asit K. Chakraborti,* “Synthesis, biological evaluation and structure–activity relationship of 2-styrylquinazolones as anti-tubercular agents,” Bioorg. Med. Chem. Lett., 2016, 26 (11), 2663–2669. DOI: 10.1016/j.bmcl.2016.04.012. Cited 37 times. IF: 2.940.
  30. Sahaj Pancholia, Tejas M. Dhameliya, Parth Shah, Pradeep S. Jadhavar, Jonnalagadda Padma Sridevi, Perumal Yogeshwari, Dharmarajan Sriram and Asit K. Chakraborti,* “Benzo[d]thiazol-2-yl(piperazin-1-yl)methanones as New Anti-mycobacterial Chemotypes: Design, Synthesis, Biological Evaluation and 3D-QSAR Studies,” Eur. J. Med. Chem. 2016, 116, 187-199. DOI: 10.1016/j.ejmech.2016.03.060. Cited 38 times. IF: 7.088.
  31. Kapileswar Seth, Sudipta Raha Roy and Asit K. Chakraborti,* “Synchronous Double C-N Bond Formation via C-H Activation as a Novel Synthetic Route to Phenazine,” J. Chem. Soc. Chem. Commun., 2016, 52 (5), 922-925. DOI: 10.1039/C5CC08640J. Cited 42 times. IF: 6.065.
  32. Naisargee Parikh, Sudipta Raha Roy, Kapileswar Seth, Asim Kumar and Asit K. Chakraborti,* ““On-water” multicomponent reaction for the diastereoselective synthesis of functionalized tetrahydropyridines and mechanistic insight,” Synthesis 2016, 48 (4), 547-556. DOI: 10.1055/s-0035-1561296. Cited 41 times. IF: 2.969.
  33. Vaibhav A. Dixit, Prakash Chandra Rathi, Shweta Bhagat, Holger Gohlke, Rasmus K. Petersen, Karsten Kristiansen, Asit K. Chakraborti, Prasad V. Bharatam,*  "Design and synthesis of novel Y-shaped barbituric acid derivatives as PPARγ activators," Eur. J. Med. Chem., 2016, 108, 423-435. DOI: 10.1016/j.ejmech.2015.11.030. Cited 19 times. IF: 7.088.
  34. Prasad V. Bharatam,* Minhajul Arfeen, Neha Patel, Priyanka Jain, Sonam Bhatia, Asit K. Chakraborti,* Sadhika Khullar, Vijay Gupta and Sanjay K. Mandal,* “Design, Synthesis, Structural Analysis of Novel Divalent N(I) Compounds and the Identification of a new Electron Donating Ligand,” Chem. Eur. J., 2016, 22 (3), 1088-1096. DOI: 10.1002/chem.201503618. Cited 33 times. IF: 5.020.
  35. Babita Tanwar,  Dinesh Kumar,  Asim Kumar,  Md. Imam Ansari,  Mohammad Mohsin Qadri, Maulikkumar D. Vaja, Madhulika Singh, and Asit K. Chakraborti,* “Friedländer annulation: Scope and limitations of metal salt Lewis acid catalysts in selectivity control for the synthesis of functionalised quinolines,” New J. Chem., 2015, 39 (12), 9824-9833. DOI: 10.1039/C5NJ02010G. Cited 16 times. IF: 3.925.
  36. Sumit S. Chourasiya, Deepika Kathuria, Shaminder Singh, Vijay C. Sonwane, Asit K. Chakraborti and Prasad V. Bharatam,* “Design, Synthesis and Biological Evaluation of Novel Unsymmetrical Azines as Quorum Sensing Inhibitors,” RSC Advances, 2015, 5 (97), 80027-80038. DOI: 10.1039/C5RA12925G. Cited 18 times. IF: 4.036.
  37. Dinesh Kumar, Pradeep S. Jadhavar, Manesh Nautiyal, Himanshu Sharma, Prahlad K. Meena, Legesse Adane, Sahaj Pancholia, and Asit K. Chakraborti,* “Convenient synthesis of 2,3-disubstituted quinazolin-4(H)-ones and 2-styryl-3-substituted quinazolin-4(3H)-ones: Applications towards the synthesis of drugs,” RSC Advances, 2015, 5 (39), 30819-30825. DOI: 10.1039/C5RA03888J. Cited 62 times. IF: 4.036.
  38. Babita Tanwar, Priyank Purohit, Banothu Naga Raju, Dinesh Kumar, Damodara N. Kommi, and Asit K. Chakraborti,* “An “all-water” strategy for regiocontrolled synthesis of 2-aryl quinoxalines,” RSC Advances, 2015, 5 (16), 11873-11883. DOI: 10.1039/C4RA16568C. Cited 45 times. IF: 4.036.
  39. Kapileswar Seth, Manesh Nautiyal, Priyank Purohit, Naisargee Parikh, and Asit K. Chakraborti,* “Palladium Catalyzed Csp2-H Activation for Direct Aryl Hydroxylation: Unprecedented Role of 1,4-Dioxane as Source of Hydroxyl Radical,” J. Chem. Soc. Chem. Commun., 2015, 51 (1), 191-194. DOI: 10.1039/C4CC06864E. Cited 94 times. IF: 6.065.
  40. Dinesh Kumar, Asim Kumar, Mohammad Mohsin Qadri, Md. Imam Ansari, Abhishek Gautam and Asit K. Chakraborti,* “In(OTf)3-catalyzed synthesis of 2-styryl quinolines: scope and limitations of metal Lewis acids for tandem Friedländer annulation–Knoevenagel condensation,” RSC Advances, 2015, 5 (4), 2920-2927. DOI: 10.1039/C4RA10613J. Cited 33 times. IF: 4.036.
  41. Shaminder Singh, Pravin J. Wanjari, Sonam Bhatia, Vijay C. Sonwane, Asit K. Chakraborti and Prasad V. Bharatam,* “Design, synthesis, biological evaluation and toxicity studies of N,N-disubstituted biguanides as quorum sensing inhibitors,” Med. Chem. Res., 2015, 24 (5), 1974-1987. DOI: 10.1007/s00044-014-1255-y. Cited 19 times. IF: 2.351.
  42. Parth Shah, Tejas M. Dhameliya, Rohit Bansal, Manesh Nautiyal, Damodara N. Kommi, Pradeep S. Jadhavar, Jonnalagadda Padma Sridevi, Perumal Yogeeswari, Dharmarajan Sriram, and Asit K. Chakraborti,* “N-Arylalkylbenzo[d]thiazole-2-carboxamides as anti-mycobacterial agents: Design, new methods of synthesis and biological evaluation,” RSC Med. Chem. (Med. Chem. Commun.) 2014, 5 (10), 1489-1495. DOI: 10.1039/C4MD00224E. Cited 41 times. IF: 3.470.
  43. Kapileswar Seth, Sanjeev K. Garg, Raj Kumar, Priyank Purohit, Vachan S. Meena, Rohit Goyal, Uttam C. Banerjee and Asit K. Chakraborti,* “2-(2-Arylphenyl)benzoxazole As a Novel Anti-Inflammatory Scaffold: Synthesis and Biological Evaluation,” ACS Med. Chem. Lett. 2014, 5 (5), 512-516. DOI: 10.1021/ml400500e. Cited 109 times. IF: 4.632.
  44. Kapileswar Seth, Priyank Purohit, and Asit K. Chakraborti,* “Cooperative Catalysis by Palladium-Nickel Binary Nanocluster for Suzuki-Miyaura Reaction of Ortho-Heterocycle-Tethered Sterically Hindered Aryl Bromides,” Org. Lett. 2014, 16 (9), 2334-2337. DOI: 10.1021/ol500587m. Cited 45 times. IF: 6.072.
  45. Linga Banoth, Bhukya Chandarrao, Brahmam Pujala, Asit K. Chakraborti,* U. C. Banerjee, “New and Efficient Chemo-enzymatic Synthesis of (R)- and (S)-Bunitrolol,” Synthesis 2014, 46 (4), 479-488. DOI: 10.1055/s-0033-1340465. Cited 5 times. IF: 2.969.
  46. L Adane, S. Bhagat, M. Arfeen, S. Bhatia, R. Sirawaraporn, W. Sirawaraporn, Asit K. Chakraborti, P. V. Bharatam, “Design and synthesis of guanylthiourea derivatives as potential inhibitors of Plasmodium falciparum dihydrofolate reductase enzyme,” Bioorg. Med. Chem. Lett. 2014, 24 (2), 613-617. DOI: 10.1016/j.bmcl.2013.12.009. Cited 35 times. IF: 2.940.
  47. Kapileswar Seth, Sudipta Raha Roy, Damodara N. Kommi, Bhavin V. Pipaliya and Asit K. Chakraborti,* “Silver nanoparticle-catalysed phenolysis of epoxides under neutral conditions: scope and limitations of metal nanoparticles and applications towards drug synthesis,” Mol. Catal (J. Mol. Catal. A: Chem.) 2014, 392C, 164-172. DOI: 10.1016/j.molcata.2014.05.011. Cited 13 times. IF: 5.062.
  48. Srikant Bhagat, Parth Shah, Sanjeev K. Garg, Shweta Mishra, Preet Kamal, Sushma Singh and Asit K. Chakraborti,* “α-Aminophosphonates as novel antileishmanial chemotypes: synthesis, biological evaluation, and CoMFA studies,” RSC Med. Chem. (Med. Chem. Commun.) 2014, 5 (5), 665-670. DOI: 10.1039/C3MD00388D. Cited 49 times. IF: 3.470.
  49. Linga Banoth, Brahmam Pujala, Asit K. Chakraborti and Uttam C. Banerjee,* “Development and validation of HPLC method for the resolution of derivatives of 1-bromo-3-chloro-2-propanol: a novel chiral building block for the synthesis of pharmaceutically important compounds,” J. Anal. Chem. 2014, 69 (12), 1206-1213. DOI: 10.1134/S1061934815010098. IF: 1.069.
  50. Dinesh Kumar, Mukesh Sonawane, Brahmam Pujala, Varun K. Jain, Srikant Bhagat and Asit K. Chakraborti,* “Supported protic acid-catalyzed synthesis of 2,3-disubstituted thiazolidin-4-ones: enhancement of the catalytic potential of protic acid by adsorption on solid support,” Green Chem. 2013, 15 (10), 2872-2884. DOI: 10.1039/C3GC41218K. Cited 89 times. IF: 11.034.
  51. Dinesh Kumar, Kapileswar Seth, Damodara N. Kommi, Srikant Bhagat and Asit K. Chakraborti,* “Surfactant micelles as microreactors for the synthesis of quinoxalines in water: scope and limitations of surfactant catalysis,” RSC Advances, 2013, 3 (35), 15157-15168. DOI: 10.1039/C3RA41038B. Cited 63 times.  IF: 4.036.
  52. Kapileswar Seth, Sudipta Raha Roy, Bhavin V. Pipaliya and Asit K. Chakraborti,* “Synergistic Dual Activation Catalysis by Palladium Nanoparticles for Epoxide Ring Opening with Phenols,” J. Chem. Soc. Chem. Commun., 2013, 49 (52), 5886 - 5888. DOI: 10.1039/C3CC42507J. Cited 42 times. IF: 6.065.
  53. Damodara N. Kommi, Dinesh Kumar, Kapileswar Seth, and Asit K. Chakraborti,* “Protecting group-free concise synthesis of (RS)/(S)-lubeluzole,” Org. Lett. 2013, 15 (6), 1158-1161. DOI: 10.1021/ol302601b. Cited 33 times. IF: 6.072.
  54. Damodara N. Kommi, Dinesh Kumar, and Asit K. Chakraborti,* ““All-water chemistry” for a concise total synthesis of the novel class antianginal drug (RS), (R), (S)-ranozaline,” Green Chem. 2013, 15 (3), 756-767. DOI: 10.1039/C3GC36997H. Cited 48 times. IF: 11.034.
  55. Damodara N. Kommi, Pradeep S. Jadhavar, Dinesh Kumar, and Asit K. Chakraborti,* “All water” one-pot diverse synthesis of 1,2-disubstituted benzimidazoles: hydrogen bond driven ‘synergistic electrophile-nucleophile dual activation’ by water,” Green Chem. 2013, 15 (3), 798-810.  DOI: 10.1039/C3GC37004F. Cited 104 times. IF: 11.034.
  56. Dinesh Kumar, Damodara N. Kommi, Rajesh Chebolu, Sanjeev K. Garg, Raj Kumar and Asit K. Chakraborti,* “Selectivity control during the solid supported protic acid catalysed synthesis of 1,2-disubstituted benzimidazoles and mechanistic insight to rationalize selectivity,” RSC Advances 2013, 3 (1), 91-98.  DOI: 10.1039/C2RA21994H. Cited 42 times. IF: 4.036.
  57. Linga Banoth, Thete K Narayana, Brahmam Pujala, Asit K. Chakraborti and Uttam Chand Banerjee “New chemo-enzymatic synthesis of (R)-1-chloro-3-(piperidin-1-yl) propan-2-ol,” Tetrahedron Asymmetry 2012, 23 (22-23), 1564-1570. DOI: 10.1016/j.tetasy.2012.10.008. Cited 8 times. IF: 2.011.
  58. Damodara N. Kommi, Dinesh Kumar, Rohit Bansal, Rajesh Chebolu and Asit K. Chakraborti,* ““All-water” chemistry of tandem N-alkylation-reduction-condensation for synthesis of N-arylmethyl-2-substituted benzimidazoles,” Green Chem. 2012, 14 (12), 3329-3335. DOI: 10.1039/C2GC36377A. Highlighted in RSC Blog by Mary Badcock, Development Editor, Green Chemistry, and may also be included in future promotional material or press releases for Green Chemistry. Cited 68 times. IF: 11.034.
  59. Rajesh Chebolu, Damodara N. Kommi, Dinesh Kumar, Narendra Bollineni and Asit K. Chakraborti,* “Hydrogen-bond driven electrophilic activation for selectivity control: the scope and limitations of fluorous alcohol promoted selective formation of 1,2-disubstituted benzimidazoles and mechanistic insight for rational of selectivity,” J. Org. Chem. 2012, 77 (22), 10158-10167. DOI: 10.1021/jo301793z. Cited 97 times. IF: 4.198.
  60. Dinesh Kumar, Damodara N. Kommi, Alpesh R. Patel and Asit K. Chakraborti,* “L-Proline catalysed activation of methyl ketones/active methylene compounds and DMF-DMA for synthesis of (2E)-3-dimethylamino-2-propen-1-ones,” Eur. J. Org. Chem. 2012, 6407-6413. DOI: 10.1002/ejoc.201200778. Cited 24 times. IF: 3.261.
  61. Dinesh Kumar, Damodara N. Kommi, Narendra Bollineni, Alpesh R. Patel and Asit K. Chakraborti,* “Catalytic procedures for multicomponent synthesis of imidazoles: selectivity control during the competitive formation of tri- and tetra-substituted imidazoles,” Green Chem. 2012, 14, 2038-2049. DOI: 10.1039/C2GC35277J. Cited 82 times. IF: 11.034.
  62. Anirban Sarkar, Sudipta Raha Roy, Dinesh Kumar, Chetna Madaan, Santosh Rudrawar, Asit K. Chakraborti,* “Lack of correlation between catalytic efficiency and basicity of amines during the reaction of aryl methyl ketones with DMF-DMA: an unprecedented supramolecular domino catalysis,” Org. Biomol. Chem. 2012, 10, 281-286. DOI: 10.1039/C1OB06043K. Cited 17 times. IF: 3.890.
  63. Brahmam Pujala, Shivani Rana, Asit K. Chakraborti,* “Zinc Tetrafluoroborate Hydrate as a Mild Catalyst for Epoxide Ring-opening with Amines: Scope and Limitations of Metal Tetrafluoroborates and Applications in the Synthesis of Anti-hypertensive Drugs (RS)/(R)/(S)-Metoprolols,” J. Org. Chem. 2011, 76, 8768-8780. DOI: 10.1021/jo201473f. Cited 65 times. IF: 4.198.
  64. Abhishek Kaler, Vachan Singh Meena, Manpreet Singh, Brahmam Pujala, Asit K. Chakraborti, Uttam Chand Banerjee, “Lipase-mediated kinetic resolution of (RS)-1-bromo-3-[4-(2-methoxy-ethyl)-phenoxy]-propan-2-ol to (R)-1-bromo-3-(4-(2-methoxyethyl) phenoxy) propan-2-yl acetate," Tetrahedron Lett. 2011, 52, 5355-5358. DOI: 10.1016/j.tetlet.2011.08.031. Cited 4 times. IF: 2.032.
  65. Anirban Sarkar, Sudipta Raha Roy, Naisargee Parikh, Asit K. Chakraborti,* “Non-solvent application of ionic liquids: organo-catalysis by 1-alkyl-3-methylimidazolium cation based room temperature ionic liquids for chemoselective N-tert-butyloxycarbonylation of amines and the influence of the C-2 hydrogen on catalytic efficiency,” J. Org. Chem. 2011, 76, 7132-7140. DOI: 10.1021/jo201102q. Cited 112 times. IF: 4.198.

 

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Patents

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Patents Granted/Filed: 42
Granted: 27
Filed: 15

Granted:  27

  1. Asit K. Chakraborti, and Babita Tanwar, “Novel 2-Biarylbenzoxazole Compounds and the Process of Preparation Thereof.” Indian Patent Grant No. 413619; Grant Date: 05-12-2022. Indian Patent Application No. 3433/DEL/2015 filed on 10.23.2015 (IP32736/CBR).
  2. Asit K. Chakraborti, Priyank Purohit, Shyam S. Sharma, Kapileswar Seth, Shivshaean B. Kharatmal, Madhulika Singh, and Gulshan Kumar, “2-(2-Aryl/Alkylphenyl)benzazoles as Selective COX-2 Inhibitory Scaffolds.” Indian Patent Grant No. 387998; Grant Date: 31-01-2022. Indian Patent Application No. 2540/DEL/2015 filed on 08.18.2015 (IP32255/NC/sa).
  3. Asit K. Chakraborti and Naisargee Parikh, “A synthesis of 5-oxochromenopyridine derivatives.” Indian Patent Grant No. 339944; Grant Date: 30-06-2020. Indian Patent Application No. 1518/DEL/2014 filed on 06.06.2014 (IP24815/AK).
  4.  Asit Kumar Chakraborti, Kapileswar Seth, Sudipta Raha Roy, Damodara Naidu Kommi, “A green process for synthesis of β–hydroxy aryl ethers in the presence of transition metal nanoparticles.” Indian Patent Grant No. 330000; Grant Date: 22-01-2020. Indian Patent Application No.  2071/DEL/2012 filed on 03.07.2012 (IP18791/SP/sm).
  5. Asit K. Chakraborti and Damodara N. Kommi, “Improved Processes for the Total Synthesis of Ranolazine.” Indian Patent Grant No. 328871; Grant Date: 03-01-2020. Indian Patent Application No. 1722/DEL/2012 filed on 05.06.2012 (IP20457/RK/rp).
  6. Asit K. Chakraborti, Kapileswar Seth, Sudipta Raha Roy and Damodara N. Kommi, “Improved Catalytic Process for the Synthesis of Dibenzo[1,3]diazepines using Metal Nanoparticles Based Catalysts.” Indian Patent Grant No. 313508; Grant Date: 31-05-2019. Indian Patent Application No. 338/DEL/2014 filed on 05.02.2014 (IP24720/SP/skm).
  7. Asit K. Chakraborti and Sudipta Raha Roy “An Improved Process for Synthesis of β-/δ-Hydroxysulfides using Ionic Liquid as an Organo Catalyst and Process of Preparation of cis-(±)-2-(4-Methoxyphenyl)-3-hydroy-2,3-dihydro-1,5-benzothiazepine-4(5H)-one.” Indian Patent Grant No. 310442; Grant Date: 29-03-2019. Indian Patent Application No. 2366/DEL/2011. Filing Date: 19.08.2011 (IP17890/JCR).
  8. Asit K. Chakraborti, Damodara N. Kommi and Dinesh Kumar, “Improved Processes for the Synthesis of Lubeluzole.” Indian Patent Grant No. 307494; Grant Date: 16-02-2019. Indian Patent Application No. 1962/DEL/2012. Filing Date: 26.06.2012 (IP20458/RK/rp).
  9. Asit K. Chakraborti, Anirban Sarkar, and Sudipta Raha Roy, “A Method for the Synthesis of N-t-Boc Formation with the Ionic Liquid Catalysts.” Indian Patent Grant No. 306975; Grant Date: 07-02-2019. Application No. 1681/DEL/2010. Filing Date: 19/07/2010 (IP14720/AY/rpra).
  10. U. C. Banerjee, Asit K. Chakraborti, Amit Agarwal and Brahmam Pujala, “Novel Substituted 6-Aminopurine Compounds as Xanthine Oxidase Inhibitors.” Indian Patent Grant No. 305460; Grant Date 08-01-2019. Application No. 1119/DEL/2011. Filing Date: Provisional 15/04/2011; Complete 16/04/2012. (IP15549/AMT/am).
  11. Asit K. Chakraborti, Dinesh Kumar, Kapileshwar Seth and Damodar N. Kommi, “A Green Procedure for Synthesis of Functionalized Compounds.” Indian Patent Grant No. 305259; Grant Date: 02-01-2019. Application No. 2023/DEL/2011. Filing Date: 18/07/2011 (IP15780/SGBA).
  12. Asit K. Chakraborti, Dinesh Kumar and Himanshu Sharma, “An Improved Process for One-Pot Synthesis of 2-Styryl-4-(3H)-Quinazolinones.” Indian Patent Grant No. 305128; Grant Date: 31-12-2018. Application No. 2443/DEL/2011. Filing Date: 26.08.2011 (IP17889/JCR).
  13. Asit K. Chakraborti, Dinesh Kumar, Sachin Bindal and Damodar N. Kommi, “An Improved Process for the Synthesis of Alkyl Ester of Carboxylic Acid.” Indian Patent Grant No. 304283; Grant Date: 11-12-2018. Application No. 2176/DEL/2011. Filing Date: 02.08.2011 (IP17891/VR)
  14. Asit K. Chakraborti and Naisargee Parikh, “Ionic Liquid as a Catalyst for an Improved Process of Dihydrobenzothiazepine Synthesis.” Indian Patent Grant No. 303782; Grant Date: 30-11-2018. Application No. 1177/DEL/2013. Filing Date: 22.4.2013 (IP21899/JCR/akm).
  15. Asit K. Chakraborti, Kapileswar Seth and Sudipta Raha Roy, “An Improved Processes for Synthesis of Phenazines and Azo-compounds based on Reusable Metal Nanoparticles as Catalyst.” Indian Patent Grant No. 301751; Grant Date: -1-10-2018. Indian Patent Appl. No. 1818/DEL/2012. Filing Date: 13.06.2012 (IP20392/AK).
  16. Asit K. Chakraborti, Alpesh R. Patel, Dinesh Kumar, Sachin Bindal, “An Improved Catalytic Process for Esterification of Carboxylic Acids.” Indian Patent Grant No. 292009; Grant Date: 23-01-2018. Indian patent. Appl. No. 1046/DEL/2009.  Filing Date: May 21, 2009.
  17. Asit K. Chakraborti, Naisargee Parikh, and Sudipta Raha Roy, “A Novel and Improved Process for the Synthesis of 2-Substituted Benzthiazoles/Benzoxazoles using Ionic Liquid as a Catalyst.” Indian Patent Grant No. 290553; Grant Date: 13-12-2017. Indian patent. Appl. No. 1404/DEL/2010. Filing Date: 16/06/2010 (IP14531/AMT/md).
  18. Asit K. Chakraborti, Alpesh R. Patel, Dinesh Kumar, “An Improved Process for Esterification using Organic Carbonates,” Indian Patent Grant No. 288722; Grant Date: 25-10-2017. Indian Patent. Appl. No. 554/DEL/2009. Filing Date: 23-03-2009 (IP11168/PC/PGV).
  19. Asit K. Chakraborti, Uttam C. Banerjee, Raj Kumar, Sanjeev K. Garg, Vachan S. Meena, “Novel cyclooxygenase-2 inhibitors.” Indian Patent Grant No. 283941; Grant Date: 06-06-2017. Indian Patent. Appl. No. 638/DEL/2008. Filing Date: 14-03-2008. IP08491G/SBitpj.
  20. Asit K. Chakraborti, Sunay V. Chankeshwara, “An Improved Organocatalytic Process for Esterification and Amidation Reaction,” Indian Patent Grant No. 277349; Grant Date: 18-11-2016. Indian patent. Appl. No. 1030/DEL/2008. Filing Date: 22-04-2008. IP08734/mt/md.
  21. Asit K. Chakraborti, Sunay V. Chankeshwara, “A Novel Dealkylation Process,” Indian patent. Indian Patent Grant No. 276107; Grant Date: 30-09-2016. Appl. No. 01645/DEL/2008. Filing date: 09-07-2008. IP09277G/mt/md
  22. Asit K. Chakraborti and Atul Kondaskar, “An Improved Process for the Preparation of Aminoalcohols.” Indian Patent Grant No. 252277; Grant Date: 04-05-2012. Indian Application No: 337/DEL/2003. Filing Date: 21-03-2003.
  23. Asit K. Chakraborti and Atul Kondaskar, “An Improved Process for Preparation of Hydroxyalkyl and Hydroxyaryl sulfides.” Indian Patent Grant No. 248681; Grant Date: 04-08-2011. Indian Application No: 1209/DEL/2002. Filing Date: 03-12-2002, IPO 0978.
  24. Asit K. Chakraborti and Rajesh Gulhane, “A Process for the Acylation of Various Substrates using a Solid Support Catalyst.” Indian Patent Grant No. 248506; Grant Date: 20-07-2011. Indian Patent Appl. No. 266/DEL/2003. Filing Date: 10-3-2003.
  25. Asit K. Chakraborti and Rajesh Gulhane, “Method for Acylation using Zirconium (IV) Compound as Catalysts.” Indian Patent Grant No. 248501; Grant Date: 20-07-2011. Indian Patent Application No: 336/DEL/2003. Filing Date: 21-03-2003; IPO 1043.
  26. Asit K. Chakraborti, Simi Sarin, Santosh V. Rudrawar, Raj Kumar, Sunay V. Chankeshwara, Abhijit Ray, Sunanda Ghosh Dastidar, “Inhibitors of Phosphodiesterase Type 4,” United States Patent. Pub. No. US 2008/0207659 A1. Pub. Date Aug. 28, 2008.
  27. Asit K. Chakraborti, Simi Sarin, Santosh V. Rudrawar, Raj Kumar, Sunay V. Chankeshwara, Abhijit Ray, Sunanda Ghosh Dastidar “Inhibitors of Phosphodiesterase Type 4,” European Patent. Pub. No. EP 1 958 947 A1. Pub. Date Aug. 20, 2008. Bulletin 2008/34

Filed:  15

  1. Asit K. Chakraborti, Sahaj Pancholia, and Tejas M. Dhameliya, “N-Arylbenzo[d]-2-carboxamides as Anti-tubercular Agents.” Indian Patent Application No. 201711010231 (TEMP/E-1/10432/2017-DEL) filed on 2017/03/23 (IP36982/CBR).
  2. Asit K. Chakraborti, and Babita Tanwar,, “Alkyl 1,2-Diamines and its bioisoters β-Aryloxyamines As Potential Anti-tubercular Agents and Preparation.” Indian Patent Application No. 3430/DEL/2015 filed on 10.23.2015 (IP32735/SB).
  3. Asit K. Chakraborti, and Babita Tanwar, “Novel 2-(2'-Aminophenyl)benzazoles as Potential Anti-tubercular Agents and improved process of preparation thereof.” Indian Patent Application No. 2838/DEL/2015 filed on 09.10.2015 (IP32256/SB/md).
  4. Asit K. Chakraborti, Babita Tanwar and Pradeep S. Jadhavar, “An improved green protocol for the synthesis of 1,2-diamines via ring opening of aziridines with amines.” Indian Patent Application No. 3741/DEL/2013 filed on 23.12.2013. Publication date (U/S 11A) 26.06.2015.
  5. Asit K. Chakraborti, Naisargee Parikh and Sudipta Raha Roy, “Process for Synthesis of Functionalized Tetrahydropyridines.” Indian Patent Application No. 226/DEL/2013 filed on 28.1.2013 (IP21900/JCR/akm).
  6. Asit K. Chakraborti, Dinesh Kumar, Santosh Rudraawar, Sachin Bindal, Himanshu and Pradeep Chopra, “Improved Processes for Synthesis of Functionalized Pyridines.” Indian Patent Application No. 3245/DEL/2012 filed on 18.10.2012 (IP16173/SP/sm).
  7. Asit K. Chakraborti, Rajesh Chebolu and Damodara N. Kommi, “An Improved Catalyst-free Process for the Direct Reductive Amination of Aromatic/Alicyclic Aldehydes and Cyclic ketones.” Indian Patent Application No. 1918/DEL/2012 filed on 21.06.2012 (IP20473/RK/am).
  8. Asit K. Chakraborti, Dinesh Kumar, Mukesh Sonawane, and Brahmam Pujala “Processes for Synthesis of 2,3-Disubstituted-4-Thiazolidinone.” Indian Patent Application No. 3148/DEL/2011 filed on 08.11.2011 (IP15779/SGBA).
  9. Asit K. Chakraborti, Dinesh Kumar, Tushar Satav, “An Improved Acid Catalyzed One Pot Synthesis of 2-Styryl Quinoline.” Indian Patent Application No. 2673/DEL/2011 filed on 15.09.2011 (IP17892/VR).
  10. Asit K. Chakraborti, Sunay V. Chankeshwara, “A Novel Process for Direct Alkylation,” Indian patent. Appl. No. 11107/DEL/2008 (May 01, 2008).
  11. Asit K. Chakraborti, Sunay V. Chankeshwara, Bavneet Singh, “An Improved Solid Support Catalyst Systems for Direct Esterification,” Indian patent. Appl. No. 2764/DEL/2007 (Dec 28, 2007).
  12. Manpreet Singh, Parikshit Khokale, Santosh Rudrawar, Asit K. Chakraborti, Uttam C. Banerjee, “Process for the preparation of (R)-1-chloro-3-(3,4-difluorophenoxy)-2-propanol.” Indian Pat. Appl. (2008), 21pp. CODEN: INXXBQ IN 2006DE02570 A 20080606. Application: IN 2006-DE2570 20061201. Priority: CAN 150:329407 AN 2008:716774 CAPLUS (Copyright (C) 2009 ACS on SciFinder (R)).
  13. Asit K. Chakraborti, Simi Sarin, Santosh V. Rudrawar, Raj Kumar, Sunay V. Chankeshwara, Sunanda Dastidar, Abhijit Ray, “Inhibitors of Phosphodiesterase  Type-IV,” PCT patent filed/1882/DEL/2006  (22-08-2006).
  14. Asit K. Chakraborti, Simi Sarin, Santosh V. Rudrawar, Raj Kumar, Sunay V. Chankeshwara, Sunanda Dastidar, Abhijit Ray, “Phosphodiesterase  Inhibitors,” PCT patent filed/566/DEL/2006  (06-03-2006).
  15. Asit K. Chakraborti, Santosh V. Rudrawar, Raj Kumar, Sunay V. Chankeshwara, Simi Sarin, Dr. Sunanda Dastidar, Dr. Abhijit Ray, ‘Inhibitors of Phosphodiesterase  Type-IV,” PCT patent filed/565/DEL/2006  (03-03-2006)