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Publications

36. Ru(II)-Catalyzed Weak Chelation-Assisted Regioselective C4−H Aminomethyl Alkenylation of Indole

Raziullah, Mohit Kumar, Anushka Rastogi, Ashfaq Ahmed, Dipankar Koley*

Adv. Synth. Catal. 2025, 367, e202400863

35. Directing Group Guided Site−Selective Alkylation of Indoles by Epoxides: Synthesis of -Indolylethyl Alcohol Derivatives

Ashfaq Ahmed, Mohit Kumar, Anushka Rastogi, Raziullah, Manoj Kumar Gangwar, Dipankar Koley*

Adv. Synth. Catal. 2024, 366, 4416-4421

Link

34. Manganese Catalyzed Site-Selective Hydroxymethylation to 2-Pyridones and Isoquinolones via C−H Activation

Anushka Rastogi, Mohit Kumar, Manoj Kumar Gangwar, Dipankar Koley*

Adv. Synth. Catal. 2024, 366, 1 – 8

Link

33. Total Synthesis of (-)-δ-Lycorane

Jyoti Shukla,* Manoj Kumar Gangwar, Dipankar Koley*

New J. Chem., 2023, 47, 18900-18904

Link

32. Direct Synthesis of β2,3-Amino Acid from β-Hydroxycarbamides: Implication in the Synthesis of Azumamide Analogs and Conformational Analysis

Afsar Ali Khan, Jayanti Vaishnav, Manoj Kumar Gangwar, Ravi Sankar Ampapathi*, and Dipankar Koley*

J Heterocyclic Chem. 2023, 60, 1918–1932

Link

31. Cu(II)-Catalyzed, Site Selective Sulfoximination to Indole and In-dolines via Dual C−H/N−H Activation

Mohit Kumar, Anushka Rastogi, Raziullah, Ashfaq Ahmad, Manoj Kumar Gangwar, Dipankar Koley*

Org. Lett. 2022, 24, 8729–8734

Link

30. Directing Group Guided Site-Selective Diversification of Indoles by Aziridine: Synthesis of β Indolylethylamines

Ashfaq Ahmad, Himangsu Sekhar Dutta, Mohit Kumar, Raziullah, Manoj Kumar Gangwar, and Dipankar Koley*

Org. Lett. 2022, 24, 2783–2787

Link

29. Ru-Catalyzed C–H alkenylation on the arene ring of pirfenidone using pyridone as a directing group.

Raziullah, Mohit Kumar, Ashfaq Ahmad, Himangsu Sekhar Dutta, Anushka Rastogi, Manoj Kumar Gangwar and Dipankar Koley*

Chem. Commun. 2022, 58, 3481–3484

Link

28. Diastereoselective [3 + 2] Cycloaddition of Quinoxalin-2(1H)‑ones with Donor−Acceptor Cyclopropanes: Efficient Synthesis of Tetrahydro pyrrolo[1,2‑a]quinoxalin-4(5H)‑ones

Himangsu Sekhar Dutta, Ashfaq Ahmad, Afsar Ali Khan, Mohit Kumar, Raziullah, Jayanti Vaishnav, Manoj Gangwar, Ravi Sankar Ampapathi, and Dipankar Koley*

J. Org. Chem. 2021, 86, 16558–16572

Link

27. Cu(II)-Catalyzed C–N, C–O, C–Cl, C–S, and C–Se Bond Formation via C(sp2)–H Activation Using 7-Azaindole as an Intrinsic Directing Group

Mohit Kumar, Raziullah, Ashfaq Ahmad, Himangsu Sekhar Dutta, Afsar Ali Khan, Anushka Rastogi, Ruchir Kant, and Dipankar Koley*

J. Org. Chem. 2021, 86, 15185–15202

Link

26. Ru(II)-Catalyzed Regioselective Hydroarylative Coupling of Indolines with Internal Alkynes by C−H Activation

Raziullah, Mohit Kumar, Afsar Ali Khan, Himangsu Sekhar Dutta, Ashfaq Ahmad, Jayanti Vaishnav, Ruchir Kant, Ravi Sankar Ampapathi, and Dipankar Koley*

Eur. J. Org.Chem. 2021, 2107–2113

ejoc202100373-toc-0001-m_edited_edited_edited_edited.jpg

Link

25. Pd-Catalyzed C−H Halogenation of Indolines and Tetrahydroquin-olines with Removable Directing Group

Ashfaq Ahmad, Himangsu Sekhar Dutta, Mohit Kumar, Afsar Ali Khan, Raziullah, Dipankar Koley*

Org. Lett. 2020, 22, 5870–5875

Link

24. Cu(II)-Catalyzed Ortho C(sp2)−H Diarylamination of Arylamines To Synthesize Triarylamines

Mohit Kumar, Rishabh Sharma, Raziullah, Afsar Ali Khan, Ashfaq Ahmad, Himangsu Sekhar Dutta, and Dipankar Koley*

Org. Lett. 2020, 22, 2152–2156

Link

23. Metal Free Benzylation and Alkylation of Quinoxalin-2(1H)-ones with Alkenes Triggered by Sulfonyl Radical Generated from Sulfinic Acids

Himangsu Sekhar Dutta, Ashfaq Ahmad, Afsar Ali Khan, Mohit Kumar, Raziullah, and Dipankar Koley*

Adv. Synth. Catal. 2019, 361, 5534-5539

Link

22. Cu(II)-Mediated Cross-Dehydrogenative Coupling of Indolines with Sulfonamides, Carboxamides, and Amines

Mohit Kumar, Raziullah, Afsar Ali Khan, Ashfaq Ahmad, Himangsu Sekhar Dutta, Ruchir Kant, and Dipankar Koley*

J. Org. Chem. 2019, 84, 13624−13635

Link

21. Cu-Catalyzed Directed C7-H Imidation of Indolines via Cross-Dehydrogenative Coupling

Raziullah, Mohit Kumar, Ruchir Kant, and Dipankar Koley*

Adv. Synth. Catal. 2019, 361, 3108-3113

Link

20. Remote C-H Functionalization of 8-Aminoquinolinamides

Bhuttu Khan, Himangsu Sekhar Dutta, and Dipankar Koley*

Asian J. Org. Chem. 2018, 7, 1270 – 1297

Link

19. Cu(I)-Catalyzed Site Selective Acyloxylation of Indoline Using O2 as the Sole Oxidant

Ashfaq Ahmad, Himangsu Sekhar Dutta, Bhuttu Khan, Ruchir Kant, Dipankar Koley*

Adv. Synth. Catal. 2018, 360, 1644-1649

Link

18. Metal-Free, Oxidant-Free, Site-Selective C‒H Halogenations to Aminoquinolines at Room Temperature using N-Halosaccharins

Himangsu Sekhar Dutta, Bhuttu Khan, Afsar Ali Khan, Raziullah, Ashfaq Ahmad, Ruchir Kant, Dipankar Koley*

ChemistrySelect 2017, 2, 6488-6492

Link

17. Organocatalytic, Asymmetric Synthesis of Aza-Quaternary Centre of Izidine Alkaloids: Synthesis of (–)-Tricyclic Skeleton of Cylindricine

Kyatham Srinivas, Nishant Singh, Dinabandhu Das, Dipankar Koley*

Org. Lett., 2017, 19, 274−277

Link

16. Copper-Catalyzed Remote C‒H Nitration of 8-Amidoquinolines

Bhuttu Khan, Afsar Ali Khan, Darshana Bora, Deepti Verma, Dipankar Koley*

ChemistrySelect 2017, 2, 260-264

Link

15. Directing Group-Assisted Copper(II)-Catalyzed ortho-Carbonylation to Benzamide using 2,2’-Azobisisobutyronitrile (AIBN)

Bhuttu Khan, Afsar Ali Khan, Ruchir Kant, and Dipankar Koley*

Adv. Synth. Catal. 2016, 358, 3753-3758

Link

14. Nickel(II)-Mediated Regioselective C-H Monoiodination of Arenes and Heteroarenes by using Molecular Iodine

Bhuttu Khan, Ruchir Kant, and Dipankar Koley*

Adv. Synth. Catal. 2016, 358, 2352-2358

Link

13. Organocatalytic, Asymmetric Mannich Cyclization of Hydroxylactam with Acetal: Total Syntheses of (−)-Epilupinine, (−)-Tashiromine and (−)-Trachelanthamidine

Dipankar Koley,* Yarkali Krishna, Kyatham Srinivas, Afsar Ali Khan, Ruchir Kant

Angew. Chem. Int. Ed., 2014, 53, 13196-13200

Highlighted in SYNFACTS (2014, 10, 1323)

Link

12. Furan based Locked Z-Vinylogous g-Amino Acid Stabilizing Protein a-Turn in Water-Soluble Cyclic alfa-3-gamma Tetrapeptides

Yarkali Krishna, Shrikant Sharma, Ravi S. Ampapathi*, Dipankar Koley*

Org. Lett., 2014, 16, 2084−2087

Link

11. A biomimetic approach for bicyclic alkaloids using acetal pro-nucleophile: total synthesis of (±)-epilupinine and formal syntheses of (±)-laburnine, (±)-isoretronecanol, and (±)-tashiromine

Dipankar Koley*, Kyatham Srinivas, Yarkali Krishna, Archita Gupta

RSC Adv., 2014, 4, 3934−3937

Link

10. Counter Ion Effect in Au/Ag-Catalyzed Chemoselective 6-endo-dig N-and O-Cyclizations of Enyne−Urea System: Diversity-Oriented Synthesis of Annulated Indoles

Gupta, S.; Koley, D.; Ravikumar, K.; Kundu, B.

J. Org. Chem. 2013, 78, 8624−8633

Post-Doctoral Research Publications

9. Functional profiling of p53-binding sites in Hdm2 and Hdmx using a genetic selection system

Datta, S.; Bucks, M. E.; Koley, D.; Lim, P. X.; Savinov, S. N.

Bioorg. Med. Chem. 2010, 18, 6099–6108

8. Chemoselective nitration of phenols with tert-butyl nitrite in solution and on solid support

Koley, D.; Colon, O. C.; Savinov, S. N.

Org. Lett. 2009, 11, 4172–4175

Doctoral Research Publications

7. Preferential mode of cyclization of tetrahydrofuran amino acids containing peptides: some theoretical insights

Kumar, N. V. S.; Sharma, P.; Singh, H.; Koley, D.; Roy, S.; Chakraborty, T. K.

J. Phy. Org. Chem. 2010, 23, 238–245

6. Synthesis, conformational analysis and biological studies of cyclic cationic antimicrobial peptides containing sugar amino acids

Chakraborty, T. K.; Koley, D.; Ravi, R.; Krishnakumari, V.; Nagaraj, R.; Kunwar, A. C.

J. Org. Chem. 2008, 73, 8731–8744

5. Studies directed toward the development of amide-linked RNA mimics: synthesis of the monomeric building blocks

Tushar Kanti Chakraborty, Praveen Kumar Gajula and Dipankar Koley

J. Org. Chem. 2008, 73, 6916–6919

4. Synthesis and structural studies of peptides containing a mannose-derived furanoid sugar amino acid

Tushar Kanti Chakraborty, Dipankar Koley, Rapolu Ravi and Ajit Chand Kunwar

Org. Biomol. Chem. 2007, 5, 3713–3716

3. Conformational analysis of some C2-symmetric cyclic peptides containing tetrahydrofuran amino acids

Tushar Kanti Chakraborty, Saumya Roy, Dipankar Koley, Samit Kumar Dutta and Ajit Chand Kunwar

J. Org. Chem. 2006, 71, 6240–6243

2. Synthesis and conformational studies of amide-linked cyclic homo oligomers of thymidine-based nucleoside amino acid

Tushar Kanti Chakraborty, Dipankar Koley, Sripadi Prabhakar, Rapolu Ravi and Ajit Chand Kunwar

Tetrahedron 2005, 61, 9506–9512

1. Carbohydrate-based designer molecules

Tushar Kanti Chakraborty, Pothukanuri Srinivasu and Dipankar Koley

Proc. Ind. Nat. Sc. Ac. 2005, 71, 175–186

Koley Research Laboratory

Ph. D/Postdoc Positions are available for 2025-August Session

Publications