Ph. D./JRF/RA/Postdoc positions are available; interested candidates may contact through email: chowhan@jnu.ac.in

Publications

70. Design, Synthesis, Crystal Structure Analysis, Hirshfeld Surface Scrutiny, and DFT-Calculations of Fused 4H-Pyrans and Spirooxindole-Embedded Fused Pyran, NS Veeranagaiah, B Borah, R Pallepogu, L. Raju Chowhan*, Journal of Molecular Structure, 2025, 1347, 143249.

69. Invited Article: Photocatalytic Asymmetric Cross-Dehydrogenative Coupling of Tetrahydroisoquinoline Scaffolds, B. Borah, L. Raju Chowhan*, Tetrahedron Letters, 2025, 155630.

68. Invited Article: Photochemical Multicomponent Synthesis of Six-Membered Heterocycles, B. Borah, P. Mihir, L. Raju Chowhan*, European Journal of Organic Chemistry, 2025, 28, e202401480.

67. Design, Synthesis, Structural Analysis, and DFT Calculation Insights into The Molecular Architecture of Amino Substituted 4H-Chromene Scaffolds, Naveena S. V, B. Borah, Raghavaiah P and L. Raju Chowhan*, Journal of Molecular Structure, 2025, 1321, 140229.

66. Asymmetric synthesis of spiro [benzofuran-pyrrolidine]-indolinedione via bifunctional urea catalyzed [3+ 2]-annulation, S Bharani, BA Rao, LR Chowhan, R Pallepogu, MS Prasad, Organic & Biomolecular Chemistry, 2025, 23, 914-919.

65. Photoredox Catalyzed Cross-Coupling of in situ Generated Quinoxalinones with Indoles for the Synthesis of Tertiary Alcohols, B. Borah, and L. Raju Chowhan*, The Journal of Organic Chemistry, 2024, 89, 14740-14754.

64. Organocatalytic Enantioselective Assembly of Dispiro-bisoxindoles with Vicinal Stereocenters, B. Borah, M. Patat, L. Raju Chowhan*, Org. Biomol. Chem., 2024, 22, 8365-8373.

63. Photochemical Domino Reaction Driven C-H/S-H Functionalization of Bioactive Molecules to Access Xanthene Scaffolds, Biplob Borah, Samrita Sharma, Snehalkumar K Chavada, Sidharth Swain, L. Raju Chowhan*, Org. Biomol. Chem., 2024, 22, 8453-8458.

62. A one-pot ultrasound-assisted regio and stereoselective synthesis of indenoquinoxaline engrafted spiropyrrolidines. R. Bokam, K. Munipalle, S. Ch. V. A, R. Annam, N. Gundoju, L. Raju Chowhan and M. Gowri Ponnapalli, Org. Biomol. Chem., 2024, 22, 5150-5158.

61. Chapter 9 - Recent strategies in the synthesis of spirooxindole scaffolds (stereoselective synthesis), B. Borah, S. Sharma, L Raju Chowhan*, Spirooxindole Chemistry, Synthesis, Characterization and Biological Significance, Elsevier, 2024, https://doi.org/10.1016/B978-0-443-22324-2.00009-6.

60. Remediation of Lead (II) ions from aqueous solution using composites of iron oxide nanoparticles Immobilized on microcrystalline cellulose. Bhupender Kumar, J Nagendra Babu, L. Raju Chowhan*. Applied Research, 2024, 3, e202200107.

59. Enantioselective Synthesis of Octahydrofuranoindole Core of Aspidosperma Alkaloids via a Diels-Alder/Reduction/Fluoroetherification Reaction Sequence. Madavi S. Prasad,* Sankar Bharani, A. K. Jha, S. C. Naik, M. Sivaprakash, and L. Raju Chowhan* Chemistry - An Asian Journal, 2023, 18, e202300419.

58. N-2,2,2-trifluoroethylisatinketimine as a 1,2-dipolarophile for [3+2] addition to access optically pure spirothiazolidine oxindoles. Madavi S. Prasad,* Sankar Bharani, Murugesan Sivaprakash, Prabha Vadivelu, D. Siva Sundara Kumar and L. Raju Chowhan* Org. Biomol. Chem., 2023, 21, 4972-4976.

57. Blossoming of Polyenamine Catalysis in Asymmetric Synthesis: Scope and Future Applications. Biplob Borah, Murugesan Sivaprakash, Samrita Sharma, Madavi S. Prasad,* L. Raju Chowhan*. Chemistry - An Asian Journal, 2023, 17, e202300370.

56. Stereoselective synthesis of CF3-containing spirocyclic-oxindoles by using N-2,2,2-trifluoroethylisatin ketimines: An updates. Biplob Borah, Naveena S V, Samrita Sharma, Mihir Patat, Raghavaiah P, M. S. Prasad and L. Raju Chowhan*. RSC Advances, 2023, 13, 7063-7075.

55. Visible-Light-Mediated Direct Expeditious Photochemical Construction of Spirocyclic-oxindoles. Biplob Borah, Samrita Sharma and L. Raju Chowhan*. Asian Journal of Organic Chemistry, 2023, e202300020.

54. Visible-light-induced Organophotocatalytic and Singlet Oxygen-initiated Domino construction of 1,4-dihydropyridines, quaternary centered C-3 functionalized Spiro[indoline-3,4'-pyridines] and C-11 functionalized Spiro[indeno-[1,2-b]quinoxalines-11,4'-pyridines] in Aqueous Medium. Biplob Borah, Mihir Patat, Vipin Singh, Murugesan Sivaprakash, Madavi S. Prasad, L. Raju Chowhan*. Org. Biomol. Chem., 2023, 21, 1518-1530.

53. Brønsted acid catalyzed domino multicomponent reactions by employing Liquid assisted Grindstone Chemistry. Biplob Borah, Sidhartha Swain, Mihir Patat, Bhupender Kumar, Ketan Kumar Prajapat, Rathindranath Biswas, L. Raju Chowhan*. Scientific Reports, 2023, 13, 1386.

52. Trienamine catalysed unprecedented remote olefin E/Z isomerisation/[4+2]-cycloaddition reaction to access spirooxindole hexahydroindoles, Madavi S. Prasad, Murugesan Sivaprakash, Sankar Bharani and L. Raju Chowhan, Org. Biomol. Chem., 2023, 21, 945-949.

51. DABCO-promoted highly diastereo- and regioselective construction of C-3 functionalized spirooxindoles via [3+2] cycloaddition of 2-aryl/heteroarylidene-1H-indene-1,3(2H)-diones with N-2,2,2-trifluoroethylisatin ketimines at ambient conditions. M. S. Prasad, S. Bharani, S. M. Sharief, M. Ravi, M. Sivaprakash, B. Borah, and L. Raju Chowhan*. RSC Advances, 2022, 12, 34941-34945.

50. Direct Michael Addition/Decarboxylation Reaction Catalyzed by Composite of Copper Ferrite Nanoparticle Immobilized on Microcrystalline Cellulose: An Eco-friendly Approach for Constructing 3,4-Dihydrocoumarin Frameworks. Bhupender Kumar, Biplob Borah, J Nagendra Babu, L. Raju Chowhan*. RSC Advances, 2022, 12, 30704.

49. Recent advances and prospects in the organocatalytic synthesis of quinazolinones. Biplob Borah, Sidhartha Swain, Mihir Patat, L. Raju Chowhan*, Frontiers in Chemistry, 2022, 10, 991026.

48. Invited Article: Recent updates on the stereoselective synthesis of structurally functionalized Spiro-oxindoles mediated by isatin N, N´‑Cyclic azomethine imine 1, 3-Dipoles. Biplob Borah, L. Raju Chowhan*, Tetrahedron Letters, 2022, 104, 154014.

47. Recent advances and prospects in the transition-metal-free synthesis of 1,4-dihydropyridines. Biplob Borah, Mihir Patat, Sidhartha Swain, L. Raju Chowhan*, ChemistrySelect, 2022, 7, e202202484.

46. Sustainable Synthesis of Highly Diastereoselective & Fluorescent Active Spirooxindoles Catalyzed by Copper Oxide Nanoparticle Immobilized on Microcrystalline Cellulose. Bhupender Kumar, J Nagendra Babu, L. Raju Chowhan*. Applied Organometallic Chemistry, 2022, 36, e6742.

45. Ultrasound-assisted transition-metal-free catalysis: A green and sustainable route towards the synthesis of bioactive heterocycles. Biplob Borah, L. Raju Chowhan*. RSC Advances, 2022, 12, 14022-14051.

44. Sonochemistry in organocatalytic domino reaction: An expedient multicomponent access to structurally functionalized dihydropyrano[3,2-b]pyrans, spiro-pyrano[3,2-b]pyrans, and spiro-indenoquinoxaline-pyranopyrans at ambient conditions. Biplob Borah, Jahnu Bora, Pambala Ramesh, L. Raju Chowhan*. RSC Advances, 2022, 12, 12843- 12857.

43. Mechanochemistry in Organocatalysis: A green and sustainable route towards the synthesis of bioactive heterocycles. Biplob Borah, L. Raju Chowhan*. Book title: Green Chemistry - New Perspectives, (ISBN 978-1-80355-778-6), 2022.

42. Efficient Conjugate Addition of 3-Methyl-5-Pyrazolones to Chalcones in Water Extract Rice Straw Ash (WERSA), Shanta Raj Lakshmi, Vipin Singh, L. Raju Chowhan.* Indian Journal of Chemistry B, 2022, 61, 94-98.

41. Graphene Oxide Catalysed Synthesis of Fused Chromeno Spiro Pyrrolidine Oxindoles via Tandem Decarboxylation and 1,3 Dipolar Cycloaddition, Vipin Singh, Shanta Raj Lakshmi, L. Raju Chowhan*. Frontiers in Chemistry, 2022, 9, 759436.

40. Recent advances in the microwave- and ultrasound-assisted green synthesis of coumarin-heterocycles. Biplob Borah, Kartikey Dhar Dwivedi, Bhupender Kumar, L. Raju Chowhan*. Arabian Journal of Chemistry, 2022, 15, 103654.

39. Recent advances in the transition-metal-free synthesis of Quinoxalines. Biplob Borah, L. Raju Chowhan*. RSC Advances, 2021,11, 37325-37353

38. 4-hydroxycoumarin: A versatile substrate for the transition-metal-free multicomponent synthesis of bioactive heterocycles, Biplob Borah, Kartikey Dhar Dwivedi, L. Raju Chowhan*. Asian Journal of Organic Chemistry, 2021, 10, 3101-3126.

37. Acetyl oxime/Azirine 1, 3-Dipole and strategy for Regio-selective Synthesis of Polysubstituted Pyrroles via [3+2] Cycloaddition with Alkyne Utilizing Fe2O3@cellulose Catalyst. Kartikey Dhar Dwivedi, Bhupender Kumar, Marri Sameer Reddy, Biplob Borah, J. Nagendra Babu, and L. Raju Chowhan*. Results in Chemistry, 2021, 3, 100201.

36. Recent advances in the metal- and organocatalyzed asymmetric functionalization of pyrroles, Biplob Borah, Kartikey Dhar Dwivedi, L. Raju Chowhan*. Asian Journal of Organic Chemistry, 2021, 10, 2709-2762.

(Top Cited Article, 2021-22)

35. Synthesis of In-situ Immobilized Iron Oxide Nanoparticles (Fe3O4) on Microcrystalline Cellulose: Ecofriendly and Recyclable Catalyst for Michael Addition. Bhupender Kumar, Marri Sameer Reddy, Kartikey Dhar Dwivedi, Amarjeet Dahiya, J. Nagendra Babu, L. Raju Chowhan*. Applied Organometallic Chemistry, 2021, 36, e6455.

(Most downloaded article 2021)

34. Review on Synthesis and Medicinal Application of Dihydropyrano[3,2-b]pyrans and Spiro-pyrano[3,2-b]pyrans by Employing the Reactivity of 5-hydroxy-2-(hydroxymethyl)-4H-pyran-4-one. Biplob Borah, Kartikey Dhar Dwivedi and L. Raju Chowhan.* Polycyclic Aromatic Compounds, 2021, 42, 5893-5937.

33. Recent approaches in the organocatalytic synthesis of pyrroles. Biplob Borah, Kartikey Dhar Dwivedi, L. Raju Chowhan.* RSC Advances, 2021, 11, 13585-1360.

Selected for the RSC Advances 10th Anniversary collection focusing on Sustainable synthesis.

32. Applications of Pyrazolone in multicomponent reactions for the synthesis of dihydropyrano[2,3-c]pyrazoles and spiro-pyrano[2,3-c]pyrazoles in the aqueous medium. Biplob Borah, Kartikey Dhar Dwivedi, Raju Chowhan.* Arkivoc, 2021, i, 273-328. DOI: 10.24820/ark.5550190.p011.481.

31. Isatin N, N’‑Cyclic Azomethine Imine 1, 3-Dipole Mediated Regio and Diastereoselective Synthesis of isoxazole-containing Spirooxindoles by an Abnormal [3+2] Cycloaddition. Kartikey Dhar Dwivedi, Marri Sameer Reddy, L. Raju Chowhan.* Tetrahedron Letters, 2020, 61, 152664.

30. Stereoselective Synthesis towards (+)-trans-Kumausyne Employing Vinylogous Mukaiyama type reaction on an α-Chloro Sulfide. L. Raju Chowhan, Sadagopan Raghavan. Indian Journal of Chemistry B. 2020, 59B, 1199-1205.

29. Highly Efficient Catalyst-Free Domino Conjugate Addition, Decarboxylation and Esterification/Amidation of Coumarin Carboxylic Acid/Esters with Pyrazolones. Shanta Raj Lakshmi, Vipin Singh, L. Raju Chowhan.* RSC Advances, 2020, 10, 13866-13871.

28. Ligand Free One-Pot Synthesis of Pyrano[2,3-c]pyrazoles in Water Extract of Banana Peel (WEB): A Green Chemistry Approach, Kartikey Dhar Dwivedi, Biplob Bora, L. Raju Chowhan.* Frontiers in Chemistry, 2020, 7, 944.

THIS ARTICLE IS PART OF THE RESEARCH TOPIC Green and Sustainable Chemistry Editor’s Pick 2021

27. Stereoselective Synthesis of Hagen’s Gland Lactone by Employing Vinylogus Mukaiyama Type Reaction. L. Raju Chowhan*, Vipin Singh, Shanta Raj Lakshmi. ChemistrySelect, 2019, 4, 13601-13603.

26. Stereoselective Synthesis of C3-C17 and C18-C34 Subunits of Bullatanocin Utilizing α-Chloro Sulfide Intermediates. L. Raju Chowhan, Sadagopan Raghavan. Tetrahedron Letters, 2019, 60, 151132.

25. Cu doped ZIF Catalyzed Synthesis of Propargyl Amines with Quaternary Carbon Center Under Solvent Free Conditions. P Ramesh, M Sameer Reddy, Venkata Rao Madduluri, Dr. L. Raju Chowhan, N Satish Kumar, ChemistrySelect, 2019, 4, 9045-9049.

24. Facile Synthesis of 3-Hydroxy Oxindole by a Decarboxylative Aldol Reaction of β-Ketoacid and Isatin in WERSA. Kartikey Dhar Dwivedi, Marri Sameer Reddy, N Satish Kumar, Dr. L. Raju Chowhan*, ChemistrySelect, 2019, 4, 8602-8605.

23. Graphene Oxide Catalyzed Synthesis of Spiropyrrolizines Marri Sameer Reddy, N. Satish Kumar, L. Raju Chowhan SYNFACTS Contributors: Yasuhiro Uozumi, Shiguang Pan. Synfacts, 2019, 15, 76.

22. Zinc oxide nanoparticle as efficient catalyst for the synthesis of novel di-Spiroindolizidinebisoxindoles in aqueous medium. N. satish kumar, Sameer Reddy, Vema Reddy B, Saratchandra Babu M, L. Raju Chowhan, Chandrasekhara Rao L. Environmental Chemistry Letters, 2019, 17, 455–464.

21. Invited Article: Selective deprotection of strategy for TBS ether under mild condition. Vipin Singh, Shanta Raj Lakshmi and L. Raju Chowhan* Applied Chemical Engineering, 2018, DOI: 10.24294/ace.v0i0.702.

20. An Efficient Solvent free synthesis of 3-methyl-4-nitro-5-styrylisoxazoles using solid nano titania. Kartikey Dhar Dwivedi, Marri Sameer Reddy, N. Satish Kumar and L. Raju Chowhan*. Journal of Chemical Sciences, 2018, 130, 129.

19. Exploring TiO2 NPs as Efficient Catalyst for 1,6 Michael addition of 3-Methyl-5-pyrazolone on 3-methyl-4-nitro-5-alkenyl isoxazoles and rapid synthesis of 3,3-bis(indolyl)oxindoles in Water. Kartikey Dhar Dwivedi, Marri Sameer Reddy, N. Satish Kumar and L. Raju Chowhan*. Synthetic Communications, 2018, 48, 2695-2707.

18. Heterogeneous Graphene Oxide as Recyclable Catalyst for Azomethine Ylide Mediated 1, 3-dipolar Cycloaddition Reaction in Aqueous Medium. Marri Sameer Reddy, N. Satish Kumar, L. Raju Chowhan*. RSC Advances, 2018, 8, 35587-35593.

17. TiO2 Nanoparticle Catalyzed Rapid Synthesis of Spiroxindole-Pyrrolidine in Aqueous Medium and Evaluation of their Antimicrobial Properties. Pambala Ramesh, Marri Sameer Reddy, N. Satish Kumar and L. Raju Chowhan*. ChemistrySelect, 2018, 3, 9096-9101.

16. Stereoselective carbon–carbon bond formation via 1,2-asymmetric induction by a β-substituent in the reaction of α-chloro sulfides with organozinc reagents. Sadagopan Raghavan, L. Raju Chowhan. Indian Journal of Chemistry B, 2018, 57B, 327-339.

15. An expedient regio and diastereoselective synthesis of novel spiropyrrolidinylindenoquinoxalines via 1,3-dipolar cycloaddition reaction. Marri Sameer Reddy, L. Raju Chowhan*, Nandigama Satish Kumar. PambalaRamesh, Saratchandra BabuMukkamala. Tetrahedron Letters, 2018, 59, 1366-1371.

14. Aqueous single step synthesis and structural characterization of allylated, propargylated, and benzylated 3-substituted 3-aminooxindoles. Sameer A. Karpe, Man Singh and L. Raju Chowhan. Synthetic Communications, 2017, 47, 1737–1746.

13. An Efficient and Rapid Synthesis of 3-hydroxy-3-alkyl-2-oxindoles via Zn Mediated Barbier Type Reaction Under Neat Condition. M. Sameer Reddy, N. Satish Kumar, L. Raju Chowhan*. Journal of Chemical Sciences, 2017, 129, 1205-1209.

12. Silver(I) Catalyzed Intramolecular Cyclization of N-(2-(alk-1-yn-1-yl))-1H Tetrazoles leading to the formation of N-cyano-2-substituted Indoles under ambient conditions. Sangeetha Panaka, Rajiv Trivedi, T. Sony, S. Prabhakar, L. Raju Chowhan. Organic Chemistry Frontiers, 2017, 4, 1574-1579.

11. Copper (I) Catalyzed Sp3 C-H Arylation of N-Arylglycine Ester Derivatives under Aerobic Conditions. Daggupati V. Ramana, L. Raju Chowhan, and MalapakaChandrasekharam. ChemistrySelect, 2017, 2, 2241-2244.

10. An expedient microwave assisted regio and stereoselective synthesis of spiro quinoxaline pyrrolizine derivatives and their AChE inhibitory activity. A. Murthy Akondi, Sowmya M, M. Lakshmi Kantam, Rajiv Trivedi, L. Raju Chowhan, Amitava Das. New Journal of Chemistry, 2017, 41, 873-878.

9. Corrosion Inhibition on Mild Steel by Phosphonium Salts in 1M HNO3 Aqueous Medium. N. Palaniappan, L. Raju Chowhan*, Sathiskumar Jothi, Infant G. Bosco, Ivan S. Cole. Surfaces and Interfaces, 2017, 6, 237-246.

8. ChemInform Abstract: Asymmetric Mannich Reaction: Highly Enantioselective Synthesis of 3-Amino-oxindoles via Chiral Squaramide Based H-bond Donor Catalysis. K Srinivasa Rao, P. Ramesh, L. Raju Chowhan and Rajiv Trivedi. ChemInform, 2016, doi.org/10.1002/chin.201652233.

7. Asymmetric Mannich Reaction: Highly Enantioselective Synthesis of 3-Amino-oxindoles via Chiral Squaramide Based H-bond Donor Catalysis. K Srinivasa Rao, P. Ramesh, L. Raju Chowhan and Rajiv Trivedi. RSC Advances, 2016, 6, 84242-84247.

6. ChemInform Abstract: An efficient four-component approach for the synthesis of novel 5-methyl-4-(2-(3-methyl-4-nitroisoxazol-5-yl)1-arylethyl)-1H-pyrazol-3-ol derivatives and their anti-bacterial study. M. Narmada, N. Satish Kumar, L. Chandrashekar, V. Dilipkumar, Sunil Kumar, L. Raju Chowhan, H. M. Meshram. ChemInform, 2016, doi.org/10.1002/chin.201652256.

5. An efficient four-component approach for the synthesis of novel 5-methyl-4-(2-(3-methyl-4-nitroisoxazol-5-yl)1-arylethyl)1H-pyrazol-3-ol derivatives and their anti-bacterial study. M. Narmada, N. Satish Kumar, L. Chandrashekar, V. Dilipkumar, Sunil Kumar, L. Raju Chowhan, H. M. Meshram. ChemistrySelect, 2016, 1, 4197-4202.

4. ChemInform Abstract: Hydrophobically Directed, Catalyst‐Free, Multi‐Component Synthesis of Functionalized 3,4‐Dihydroquinazolin‐2(1H)‐ones. D. V. Ramana, B. Vinayak, V. Dileepkumar U.S. N. Murty, L. Raju Chowhan and M. Chandrasekharam. ChemInform. 2016, doi.org/10.1002/chin.201628206.

3. Hydrophobically directed, catalyst-free, multicomponent synthesis of functionalized 3,4- dihydroquinazolin-2(1H)-ones. D. V. Ramana, B. Vinayak, V. Dileepkumar U. S. N. Murty, L. Raju Chowhan and M. Chandrasekharam. RSC Advances, 2016, 6, 21789-21794.

2. ChemInform Abstract: Highly Stereoselective Preparation of Chiral a-Substituted Sulfides from -Chloro Sulfides via 1,2-Asymmetric Induction. Sadagopan Raghavan, V. Vinoth, L. Raju Chowhan. ChemInform, 2010, doi.org/10.1002/chin.201047086.

1. Highly Stereoselective Preparation of Chiral a-Substituted Sulfides from a-Chloro Sulfides via 1,2-Asymmetric Induction. S Raghavan, V. Vinoth, L. Raju Chowhan. Synlett, 2010, 12, 1807-1810.

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