Publication from CLRI

2026

37. An Operationally Simple Metal-Free Route to Structurally Diverse Multisubstituted Thiophenes

Chibisree Elanchezhian, Pooja Sivaganesan, Ghanashyam Sivaprasad, Mrinal Kanti Das and Saikat Chaudhuri *

ES Chemistry and Sustainability, 2026 (Accepted article)

Asiam Chatterjee Special Issue - March 2026 (Invited article)

36. Ion-Pair as a Superacidic Precatalyst for the Synthesis of Indole Alkaloids: A Novel Entry into the Fischer Indole Synthesis

Pooja Sivaganesan,§ Diksha Bansal,§ Chibisree Elanchezhian,§ Mrinal Kanti Das and Saikat Chaudhuri *

Green Chem. 2026, 28, 424-432

DOI: https://doi.org/10.1039/D5GC04707B

35. Halogen Bond-Driven Oxa-Pictet–Spengler Cyclization Using CBr₄: A MetalFree and Regioselective Approach for the Synthesis of Tetracyclic Dihydrochromenoindole Scaffolds*

Diksha Bansal,§ Pooja Sivaganesan,§ Ghanashyam Sivaprasad, Janani Ilango, Mrinal K Das, Saikat Chaudhuri*

Synlett 2026, 37, 361-366

DOI: 10.1055/a-2711-1613

2025

34. A Critical Review on Rubriflordilactones A, B, C: Occurrence, Structural Diversity, Bioactivities, and Synthesis

Diksha Bansal, Pooja Sivaganesan, Chibisree Elanchezhian, Mrinal Kanti Das and Saikat Chaudhuri *

Org. Biomol. Chem. 2025, 23, 10817-10839

DOI: https://doi.org/10.1039/D5OB01614B

33. A Practical and Scalable Synthesis of Cyclized and Uncyclized Xanthene-1,8-dione Derivatives Using Cyanuric Chloride as a Green Organocatalyst

Pooja Sivaganesan, Ghanashyam Sivaprasad, Diksha Bansal, Mrinal Kanti Das, and Saikat Chaudhuri*

Eur. J. Org. Chem. 2025, 28, e202500921

DOI: 10.1002/ejoc.202500921

32. Facile Access to Indolo[2,3-b]quinoline Alkaloids via DMSO-Mediated Cascade Cyclization: Unveiling Their Photophysical Potential

Gokulprasanth Nataraj, Ranjithkumar Chandran, Muniappan Kalipriyadharshini, Diksha Bansal, Shanmugam Easwaramoorthi, Mrinal Kanti Das, and Saikat Chaudhuri*

Org. Chem. Front. 2025, 12, 7081-7090

DOI: 10.1039/D5QO01193K

31. Collective Synthesis of Indole-Derived Natural Products via Halogen Bond Donor Catalysis: Efficient Access to Arundine, Turbomycin B, and Arsindoline A through 3,3’-Bis(indolyl)methane Assembly*

Chibisree Elanchezhian, Janani Ilango, Diksha Bansal, Mrinal Kanti Das, and Saikat Chaudhuri*

J. Heterocycl. Chem. 2025, 62, 2041-2050

DOI: http://doi.org/10.1002/jhet.70100

30. CBr4 as an Efficient Halogen Bond Donor Catalyst in Pictet–Spengler Cyclizations: A Metal-Free Approach to the Synthesis of Benzazepinoindoles and Tetrahydro- β -Carbolines

Gokulprasanth Nataraj,§ Diksha Bansal,§ Ranjithkumar Chandran, Sunandan Sarkar, Mrinal Kanti Das, and Saikat Chaudhuri*

Chem Asian J. 2025, 20, e70280

DOI: https://doi.org/10.1002/asia.70280

29. A Serendipitous Non-Metal-Mediated sp³ C–H Functionalization of 2-Methyl Indolyl Scaffold for the Synthesis of 2-Alkenyl Indoles*

Diksha Bansal,§ Gokulprasanth Nataraj,§ Mrinal Kanti Das, and Saikat Chaudhuri*

Asian J. Org. Chem. 2025, 14, e00575

DOI: 10.1002/ajoc.202500575

28. A New Homogeneous Catalyst for the Synthesis of 3,3′‐bis(indolyl)methanes (BIMs): Collective Synthesis of Arundine, Turbomycin B, Arsindoline A and Tris(1H‐indol‐3‐yl)methane*

Chibisree Elanchezhian,§ Diksha Bansal,§ Ghanashyam Sivaprasad, Mrinal Kanti Das, Saikat Chaudhuri*

Eur J. Org. Chem. 2025, 28, e202500396

DOI: 10.1002/ejoc.202500396

27. Pentafluorophenol (C6F5OH) Catalyzed Regioselective Annulation for the Synthesis of Tetracyclic Dihydrochromeno Indoles

Diksha Bansal, Pooja Sivaganesan, Gokulprasanth Nataraj, Chibisree Elanchezhian, Mrinal Kanti Das, and Saikat Chaudhuri*

Tetrahedron Lett. 2025, 165-166, 155660

DOI: https://doi.org/10.1016/j.tetlet.2025.155660

26. A Transition-Metal-Free Strategy for Dihydrobenzazepinoindole via KI-Mediated Oxidative Pictet-Spengler Reaction

Pooja Sivaganesan,§ Diksha Bansal,§ Nitha Arkanni Nazar, Mrinal Kanti Das, and Saikat Chaudhuri*

Chem Asian J. 2025, 20, e202500498

DOI: https://doi.org/10.1002/asia.202500498

25. Synthesis of Dihydro-benzazepinoindoles via an Oxidative Pictet-Spengler Reaction*

Pooja Sivaganesan,§ Diksha Bansal,§ Chibisree Elanchezhian, Gokulprasanth Nataraj, Mrinal Kanti Das, and Saikat Chaudhuri*

Asian J. Org. Chem 2025, 14, e202500327

DOI: https://doi.org/10.1002/ajoc.202500327

24. A Convenient Ammonium Chloride Catalysed Mild and Efficient Synthesis of Benzazepinoindole Derivatives through a Pictet-Spengler Reaction*

Chibisree Elanchezhian,§ Diksha Bansal,§ Pooja Sivaganesan, Gokulprasanth Nataraj, Mrinal Kanti Das, and Saikat Chaudhuri*

Tetrahedron Lett. 2025, 160, 155529

DOI: https://doi.org/10.1016/j.tetlet.2025.155529

23. Pentafluorophenol-Catalyzed Metal-Free Fischer Indole Synthesis: A Novel Approach to Carbazole Derivatives and Desbromoarborescidine A*

Diksha Bansal,§ Pooja Sivaganesan,§ Chibisree Elanchezhian, Gokulprasanth Nataraj, Mrinal Kanti Das, and Saikat Chaudhuri*

Chem Asian J. 2025, 20, e202500246

DOI: https://doi.org/10.1002/asia.202500246

22. Water Mediated Chemoselective Synthesis of Novel Spiro benzoxazinoindoline and Extended Synthesis of Spiro benzoxazinoindene Derivatives*

Diksha Bansal,§ Pooja Sivaganesan,§ Chibisree Elanchezhian, Gokulprasanth Nataraj, Mrinal Kanti Das, and Saikat Chaudhuri*

Eur. J. Org. Chem. 2025, 28, e202401488

DOI: https://doi.org/10.1002/ejoc.202401488

21. Efficient, One Pot, Green Syntheses of Analogues of 3,4-dihydro-2H pyrroles as Potential New Antifungal and Antibacterial Agents

Pooja Sivaganesan, Lavanya Ganeshan, Subiksha VL, Suchetana Pal, Somasri Dam, Jit Sarkar,Saikat Chaudhuri*

ChemistrySelect 2025, 10, e202404705

DOI: https://doi.org/10.1002/slct.202404705

20. "Medium Size Heterocyclic Ring Syntheses in Green Solvent: An Overview" (Invited Article)

Pooja Sivaganesan, Swetha Vinayagam, Jit Sarkar, and Saikat Chaudhuri*

Prayogik Rasayan, 2025, 8(4), 73-85

DOI: https://doi.org/10.53023/p.rasayan-20241227

19. "A Practical and Metal-Free Approach Towards Synthesis of Spiro-benzazepinoindole Derivatives via Pentafluorophenol Catalyzed Pictet-Spengler Reaction†”

Diksha Bansal,§ Gokulprasanth Nataraj,§ Chibisree Elanchezhian, Pooja Sivaganesan, Mrinal Kanti Das,* Saikat Chaudhuri*

Chem Asian J. 2025, 20, e202401437

DOI: https://doi.org/10.1002/asia.202401437.

2024

18. "A Convenient Proline Catalysed Paal-Knorr Synthesis of Highly Substituted Pyrrole: Construction of Pyrrolo[2,1-a]isoquinoline scaffold”

Pooja Sivaganesan, Chibisree Elanchezhian, Diksha Bansal, Jit Sarkar , Saikat Chaudhuri*

New J. Chem. 2024, 48, 20034-20040

DOI: https://doi.org/10.1039/D4NJ04636F 313410

17. "A Comprehensive Review of Synthetic Approaches Toward Lamellarin D and its Analogous”

Pooja Sivaganesan, Subiksha VL, Arupratan Sahoo, Chibisree Elanchezhian, Gokulprasanth Nataraj, and Saikat Chaudhuri*

ChemistrySelect, 2024, 9, e202403112.

DOI: https://doi.org/10.1002/slct.202403112

16. "Syntheses of Novel Spirobenzazepinoindole Derivatives via Lewis-Acid Catalyzed Pictet-Spengler Cyclization"

Diksha Bansal, Gokulprasanth Nataraj, Pooja Sivaganesan, Mrinal Kanti Das,* Saikat Chaudhuri*

Chem Asian J., 2024, 19, e202401025

DOI: https://doi.org/10.1002/asia.202401025

15. "Self-Healable Hydrogels from Vegetable Oil: Preparation, Mechanism, and Applications”

Chandrapaul Mukherjee, Avik Ghosh, Tamilarasi M, Kartik Ravishankar, Abhijit K. Das, Mariappan Selvaraj, Saikat Chaudhuri, Jit Sarkar*

Biomac. 2024, 25, 7323.

DOI: https://doi.org/10.1021/acs.biomac.4c01009

14. "Harnessing leather waste in polymer matrix for sustainablesmart shape-stable phase change materials”

Jit Sarkar,* Debasis Samanta, Saikat Chaudhuri, Angeline J, K. G. Akshaya Kumari, Sellamuthu N. Jaisankar *

J. Appl. Polym. Sci. 2024, 141, e55659

Publication from Ph.D and Postdoctoral Research

13. "Catalytic Asymmetric Approach to the Naturally Occuring Clavine Alkaloid (+)-Lysergine"

Mrinal K. Das, Kundan Shaw, Saikat Chaudhuri, Debabrata Mondal, Alakesh Bisai*

Synthesis, 2024 DOI: 10.1055/a-2385-5110; Art ID: SS-2024-06-0253-OP

12. “Green synthetic approaches for medium ring–sized heterocycles of biological and pharmaceutical interest”

Saikat Chaudhuri; Amirta Ghosh; Shital K Chattopadhyay

Elsevier 2021, ISBN: 978-0-12-820792-5 (Chapter 14) Click here for pdf

11. “The Knoevenagel condensation using quinine as an organocatalyst under solvent-free conditions”

Kavita Jain; Saikat Chaudhuri; Kuntal Pal and Kalpataru Das*

New J. Chem.,2019, 43, 1299 Click here for pdf

10. “β-Strand inspired bifacial π-conjugated polymers”

Saikat Chaudhuri; Manikandan Mohanan; Andreas V. Willems; Jeffery A. Bertke and Nagarjuna Gavvalapalli*

Chem. Sci., 2019, 10, 5976 Click here for pdf

9. “ An Expeditious route to the synthesis of the enantioenriched teracyclic core of ergot alkaloids via an organocatalytic aldol reaction”

Saikat Chaudhuri§; Subhajit Bhunia§; Subhadip De, K. Naresh Babu and Alakesh Bisai *(§Both authors have equally contributed)

Org. Biomol. Chem., 2018, 16, 2427 Click here for pdf

8. “Catalytic Asymmetric Formal Total Syntheses of (+)- and (-)-Cycloclavine”

Saikat Chaudhuri, Santanu Ghosh, Subhajit Bhunia and Alakesh Bisai *

Chem. Commun., 2018, 54, 940 Click here for pdf

7. “Transition-Metal Free Oxidative Alkynylation of 2-Oxindoles with Ethynylbenziodoxolone (EBX) Reagents”

Avishek Roy; Mrinal Kanti Das; Saikat Chaudhuri; and Alakesh Bisai*

J. Org. Chem. 2018, 83, 403-421 Click here for pdf

6. “Biomimetic Total Syntheses of Clavine Alkaloids”

Saikat Chaudhuri†; Subhajit Bhunia†; Avishek Roy; Mrinal K. Das; and Alakesh Bisai*(†Both authors have equally contributed)

Org. Lett. 2018, 20, 288-291 Click here for pdf

5. “Total Syntheses of Pyroclavine, Festuclavine, Lysergol, and Isolysergol Via a Catalytic Asymmetric Nitro-Michael Reaction”

Subhajit Bhunia§; Saikat Chaudhuri§; and Alakesh Bisai*(§Both authors have equally contributed)

Chem. Eur. J. 2017, 23, 11234-11238 Click here for pdf

4. “Highly Stereoselective Syntheses of Proline-Derived Vicinal Amino Alcohols through Grignard Addition onto N-Tosylprolinal”

Saikat Chaudhuri; Amarchand Parida; Santanu Ghosh; and Alakesh Bisai*

Synlett 2016, 27, 215 Click here for pdf

3. “Catalytic Enantioselective Decarboxylative Allylations of a Mixture of Allylcarbonates and Allylesters: Total Syntheses of (-)- and (+)-Folicanthine”

Santanu Ghosh†; Saikat Chaudhuri†; and Alakesh Bisai * (†Both authors have equally contributed)

Chem. - Eur. J. 2015, 21, 17479-17484 Click here for pdf

2. “Oxidative Dimerization of 2-Oxindoles Promoted by KOtBu-I2: Total Synthesis of (±)-Folicanthine”

Santanu Ghosh; Saikat Chaudhuri; and Alakesh Bisai*

Org. Lett. 2015, 17, 1373-1376 Click here for pdf

1. “Pd-Catalyzed direct arylation approach to the 6H-dibenzo[c,h]chromenes : Total synthesis of arnottin I"

Subhadip De; Saikat Chaudhuri; Sourabh Mishra; Himanshu Mamtani; and Alakesh Bisai*

J. Indian Chem. Soc., 2013, 90, 1871-1884 Click here for pdf