Embedded Files
2025
2025
67. Bioinspired Synthesis of Bridged Isochromane Fused Pyrazoles by a Silver Catalyzed Cascade Reaction and Its Application for Antibacterial Activity Bhuvnesh Singh, Shreya Tewari, Manleen Kaur, Himanshu Sharma, Kumar Vanka. Neetu Singh and Ravi P. Singh* JACS Au. 2025,XXX, XXX−XXX doi: https://doi.org/10.1021/jacsau.5c00105 click here
66. Catalytic Atroposelective Coumarin Alkenylation Abhijeet Singh and Ravi P. Singh* Org. Lett., 2025, 27, 9130−9135 click here
65. Unlocking Thermodynamic Enolate for Kinetically Controlled Desymmetrizing Vinylogous (4+1) Carbospiroannulation
Sanjay Singh, Abhijeet Singh, Rinu Pandya, Kumar Vanka, Ravi P. Singh* Chem. Eur. J. 2025, e202500671. click here
64. A radical approach towards polarity-reversed para-substitution of electron-deficient arenes Shashank Singh, Arindam Kundu, Claire Empel, René Michael Koenigs* and Ravi P. Singh* Chem. Commun. 2025, 61, 3888-3891. click here
63.Photoinduced stereoselective reactions using pyridinium salts as radical precursors Shashank Singh†, Diksha Gambhir† and Ravi P. Singh* Chem. Commun. 2025, 61, 3436-3446. Click here
2024
2024
62.Polar-effect-directed control in site-selectivity of radical substitution enables C-H perfluoroalkylation of coumarins Shashank Singh and Ravi P. Singh* J. Org. Chem. 2024, 89, 14785–14801. Click here
61.Deciphering Asymmetric Brønsted Base-Aminocatalytic Mode in Pudovik/[1,2]-Phospha-Brook Rearrangement/Michael Cascade Reaction Ravneet Kaur, Saurabh Rautela, Mubarik Ali and Ravi P. Singh* J. Org. Chem. 2024 89 (19), 14177-14182. Click here
60.Photoinduced Stereoselective Giese Addition on Coumarins Shashank Singh and Ravi P. Singh* Synthesis. 2025, 57, 481-487. Click here
59.Diastereoselective Strategy for Dihydrophenanthrene-Fused Spirooxindoles via [1,2]-phospha-Brook Rearrangement Amjad Ali, Harish K. Harit, Chandana Behera and Ravi P. Singh* Chem. Commun.2024,60, 8904-8907 Click here
58.An expedient approach to access Phenalenones via unconventional [1,2]-phospha Brook Rearrangement/Carbonyl migration Amjad Ali, Chandana Behera and Ravi P. Singh* J. Org. Chem. 2024 89 (11), 7644-7655 (Click here)
57.Photoinduced metal-free trifluoro/perfluoroalkylation of heteroarenes Shashank Singh and Ravi P. Singh*Org. Biomol. Chem., 2024,Doi :10.1039/D4OB00511B. (Click here)
56.Desymmetric homologating annulation to access chiral pentafulvenes and their application in bioimaging. Sanjay Singh, Ravi Saini, Akshay Joshi, Neetu Singh and Ravi P. Singh* Nat. Commun. 2024. DOI:10.1038/s41467-024-45346-4. (Click here)
55. Asymmetric 1,2-diaxial synthesis of bi-(hetero)aryl benzofulvene atropisomers via transient directing group-assisted dehydrogenative coupling, Soumyadip Hore, Abhijeet Singh and Ravi P. Singh* Chem. Commun. 2024 DOI: 10.1039/d3cc06011j (Click here)
2023
2023
54. Enamine/Iminium-based Dual Organocatalytic Systems for Asymmetric Catalysis and Synthesis Diksha Gambhir, Sanjay Singh and Ravi P. Singh* Chem. Asian J. 2023, doi. 10.1002/ asia.202300627(Accepted manuscript). Click here
53. Stereoselective Reductive Coupling Reactions Utilizing [1,2]-Phospha-Brook Rearrangement: A Powerful Umpolung Approach, Ravneet Kaur and Ravi P. Singh* J. Org. Chem. 2023, 88, 15, 10325-10338. Click here
52.Visible-light Induced Metal-free Selenation of Tryptamines/3-alkyl indoles, Shashank Singh, Kalyan S Naskar, Arindam Kundu, Ravi P. Singh* Synthesis. 2023, 55(21), 3685-3692. Click here
51.Regioselective Direct C-H Phosphorylation of Benzofulvenes, Soumyadip Hore, Abhijeet Singh, Ravi P. Singh* Chem. Asian J. 2023, 18, e202201224. Click here
50. Enantioselective Distal Functionalization of 3-cyano-4-methylcoumarins Through Direct Vinylogous Conjugate Addition to Maleimides, Sanjay Singh, Ravi Saini, and Ravi P. Singh* J. Org. Chem, 2023, 88, 12, 7712-7723. Click here
2022
2022
49. Ring Expansion of Isatins via 1,2-Phospha-Brook Rearrangement: A Convenient Synthesis of 2-Quinolinone Derived p-Quinone Methide . Amjad Ali, Harish K. Harit, Manju Devi, Dibyajyoti Ghosh and Ravi P. Singh J. Org. Chem. 2022, 87, 24, 16313–16327. Click here
48.Visible light induced alkylation of 2-iminochromene Shashank Singh and Ravi P. Singh* Org. Biomol. Chem., 2022,20, 7891-7895. Click here
47.Visible-Light-Driven site-selective Alkylation of Benzo Core of Coumarins Krishna N. Tripathi†, Shashank Singh†, Naved Akhtar, Kuntal Manna*, and Ravi P. Singh* Chem. Commun., 2022, 58, 9674-9677. Click here
46.Redox activated amines in organophotoinduced alkylation of coumarins Shashank Singh, Krishna N Tripathi and Ravi P. Singh* Org. Biomol. Chem., 2022,20, 5716-5720 Click here
45. Polyarylquinone Synthesis by Relayed Dehydrogenative [2+2+2] Cycloaddition. Soumyadip Hore,Abhijeet Singh, Shreemoyee De, Neetu Singh*,Vincent Gandon* and Ravi P. Singh*, ACS Catal. 2022,12,6227-6237 Click here
44. Diastereoselective 1,6-Addition of α-Phosphonyloxy Enolates to para-Quinone Methides. Amjad Ali, Raveena Jajoria, Harish K. Harit and Ravi P. Singh*, J. Org. Chem. 2022, 87, 8, 5213-5228 Click here
43. Phosphorylation of arenes, heteroarenes, alkenes, carbonyls and imines by dehydrogenative cross-coupling of P(O)–H and P(R)–H. Soumyadip Hore and Ravi P. Singh*, Org. Biomol. Chem., 2022,20, 498 Click here
2021
2021
42. Copper-Catalyzed C-C Bond Formation via C-H Functionalization of N-Heterocycles Soumyadip Hore, Abhijeet Singh, Ravi P. Singh Handbook of C-H functionalization 2021 (Wiley). Click here
41. Stereoselective Synthesis of Dihydrocoumarins via [1,2]-PhosphaBrook Rearrangement in Three-Component Coupling Reaction of α‑Ketoesters, o‑Quinone Methides, and Dialkyl Phosphites Ravneet Kaur, Dipak Singh, and Ravi P. Singh* J. Org. Chem. 2021, 86, 15702-15711 Click here
40. Enantioselective vinylogous aldol reaction of acylphosphonates with 3-alkylidene oxindoles Manish K. Jaiswal, Sanjay Singh and Ravi P. Singh Org. Biomol. Chem., 2021,19, 7861 Click here
39. KOH-mediated stereoselective alkylation of 3-bromooxindoles for the synthesis of 3,3′-disubstituted oxindoles with two contiguous all carbon quaternary centres Manju Devi , Amol P. Jadhav and Ravi P. Singh New J. Chem., 2021, 45, 8445-8448 Click here
38. Catalytic enantioselective synthesis of chiral 4-hydroxy 4′-substituted pyrazolones by the vinylogous aldol reaction of pyrazole-4,5-diones with 3-alkylidene-2-oxindoles Krishna Kumar , Bhuvnesh Singh , Soumyadip Hore and Ravi P Singh New J. Chem., 2021, 45, 13747-13750 Click here
2020
2020
37. A silver-catalyzed stereoselective domino cycloisomerization–vinylogous aldol reaction of ortho-alkynylbenzaldehydes with 3-alkylidene oxindoles: an entry to functionalized isochromenes Krishna Kumar , Bhuvnesh Singh and Ravi P. Singh Chem. Commun., 2020, 56, 15153-15156 Click here
36. Stereoselective formal [3 + 3] annulation of 3-alkylidene-2-oxindoles with β,γ-unsaturated α-keto esters. Manish K. Jaiswal, Bhuvnesh Singh, Shreemoyee De , Neetu Singh and Ravi P. Singh Org. Biomol. Chem., 2020, 18, 9852-9862 Click here
35. Design and development of fluorescence-capable novel pyrazine-based polycyclic heteroaromatics for cellular bioimaging. Vijay Gupta, Parul Sirohi, Neetu Singh and Ravi P. Singh New J. Chem., 2020, 44, 17714-17718 Click here
34. Stereoselective Synthesis of Spiro-α-methylene-γ-lactams via Chiral Quaternary 3-Aminooxindole Adducts Accessed by Zn-Mediated Allylation of Sulfinyl Ketimines V. U. Bhaskara Rao†, Shashank Singh†, Krishna N. Tripathi , Ravi P. Singh Synthesis 2020; 52(17): 2551-2562 Click here
33. The Vinylogous Michael Addition of 3‐Alkylidene‐2‐oxindoles to β,γ‐Unsaturated α‐Keto Esters by Bifunctional Cinchona Alkaloids. Manish K. Jaiswal,Rajesh Kumar, Sanjay Singh, Shailija Jain, Kumar Vanka and Ravi P. Singh Eur. J. Org. Chem. 2020;5690–5694 Click here
32. Bifunctional Cinchona Alkaloid Catalyzed Vinylogous Michael Reaction of 3–Alkylideneoxindole with 4-Oxo-enoates: A Route to Chiral γ-Keto Alkylideneoxindole Esters. Rajesh Kumar,Manish K. Jaiswal, Ravi P. Singh Asian J. Org. Chem. 2020, 9, 1576 Click here
31. CAN-Mediated Oxidative Cyclodehydrogenation of Hexapyrrolylbenzenes. Satish K. Pandey , Vijay Gupta , Ravi P. Singh Synlett 2020; 31(13): 1268-1272 Click here
30. Palladium-Catalyzed Oxidative Annulation of Pyrrolylalkyl-1H-azoles: Towards the Synthesis of Polyheterocyclic Arenes Krishna N. Tripathi , Avinash H. Bansode , Ravi P. Singh Synthesis 2020; 52(05): 719-726 Click here
29. Organo Photoinduced Decarboxylative Alkylation of Coumarins with N-(Acyloxy)phthalimide. Krishna N. Tripathi Md. Belal and Ravi P. Singh J. Org. Chem. 2020, 85, 2, 1193–1201 Click here
2019
2019
28. Diastereoselective multi-component tandem condensation: synthesis of 2-amino-4-(2-furanone)-4H-chromene-3-carbonitriles. Vijay Gupta , Debashish Sahu , Shailja Jain , Kumar Vanka and Ravi P. Singh Org. Biomol. Chem., 2019, 17, 8853-8857 Click here
27. Enantioselective vinylogous Michael addition of β,γ-unsaturated butenolide to 2-iminochromenes. Vijay Gupta and Ravi P. Singh New J. Chem., 2019, 43, 9771-9775 Click here
26. Cu-Catalyzed Direct C–P Bond Formation through Dehydrogenative Cross-Coupling Reactions between Azoles and Dialkyl Phosphites. Soumyadip Hore , Abhijeet Srivastava , and Ravi P. Singh J. Org. Chem. 2019, 84, 11, 6868– 6878 Click here
25.Toward development of generic inhibitors against the 3C proteases of picornaviruses. Kamalika Banerjee , Ruchika Bhat,V.U.BhaskaraRao , Anshu Nain , Kartik Lakshmi Rallapalli Sohona Gangopadhyay ,R.P.Singh , ManidipBanerjee and Bhyravabhotla Jayaram The FEBS Journal, 2019,286, 765-787 Click here
2018
2018
24. Facile synthesis of triphenylenes and triphenylene/phenanthrene fused heteroaromatics. Vijay Gupta , Satish K. Pandey and Ravi P. Singh : Org. Biomol. Chem., 2018,16, 7134 Click here
24. Facile synthesis of triphenylenes and triphenylene/phenanthrene fused heteroaromatics. Vijay Gupta , Satish K. Pandey and Ravi P. Singh : Org. Biomol. Chem., 2018,16, 7134 Click here
2017
2017
23. Pd-Catalyzed regioselective intramolecular dehydrogenative C-5 cross coupling in an N-substituted pyrrole-azole system. Krishna N. Tripathi, Devalina Ray and Ravi P. Singh. Org. Biomol.Chem., 2017 Click here
22. Synthesis of Pyrrole-Annulated Heterocycles through Copper-Catalyzed Site-Selective Dehydrogenative Cross-Coupling. Krishna N. Tripathi, Devalina Ray and Ravi P. Singh. Eur. J. Org. Chem. 2017 Click here
21. Asymmetric Vinylogous Aldol Reaction of alfa-ketoesters with 3-alkylidene oxindoles. Krishna Kumar, Manish Kumar Jaiswal and Ravi P Singh. Adv. Synth. Catal. 2017 Click here
20.Asymmetric Stereoablative Aryloxylation of 3-Bromooxindoles with Bifunctional Catalyst. Amol P. Jadhav, Aarti Manchanda, Manish Kumar Jaiswal and Ravi P. Singh Adv. Synth. Catal. 2017 Click here
19.DBU-Mediated Diastereoselective Aldol-Type Cyanomethylation of Isatins. V. U. Bhaskara Rao, Krishna Kumar, Tamal Das, Kumar Vanka, and Ravi P. Singh J. Org. Chem., 2017 Click here
18. Vinylogous Nucleophilic Substitution of the Hydroxy Group in Diarylmethanols with 3-Propenyl-2-silyloxyindoles: Towards the Synthesis of α-Alkylidene-δ-diaryl-2-oxindoles. Amol P. Jadhav, Amjad Ali, Ravi P. Singh, Adv. Synth. Catal. 2017 Click here
2016
2016
17. Intramolecular Dehydrogenative Coupling of 2,3-Diaryl Acrylic Compounds: Access to Substituted Phenanthrenes.Vijay Gupta, V. U. Bhaskara Rao, Tamal Das, Kumar Vanka, and Ravi P. Singh, J. Org. Chem., 2016 Click here
16. Copper-Catalyzed Direct Cross-Coupling of CompoundsContaining Activated C–H/Heteroatom–H Bonds with N-Tosylhydrazones.Amol P. Jadhav, Devalina Ray, V. U. Bhaskara Rao, and Ravi P. Singh, Eur. J. Org. Chem. 2016 Click here
2015
2015
15. An efficient aldol-type direct reaction of isatins with TMSCH2CN. V. U. Bhaskara Rao, Krishna Kumar and Ravi P. Singh,. Org. Biomol.Chem., 2015 Click here
14. Asymmetric Vinylogous Michael Reaction of Cyclic Enones with Silyloxy Furans. Amol P. Jadhav, V. U. Bhaskara Rao, P. Singh Rajesh G. Gonnade and Ravi P. Singh, Chem Commun. 2015. Click here
13. Ligand–Promoted Intramolecular Dehydrogenative Cross-Coupling with Cu Catalyst: A Direct Access to Polycyclic Heteroarenes.D. Ray, T. Manikandan, A. Roy, Krishna N. Tripathi, Ravi P. Singh, Chem Commun. 2015. Click here
2014
2014
12. Asymmetric Vinylogous Mannich Reaction of Silyloxy Furans with N-tert-Butanesulfinyl Ketimines.V. U. Bhaskara Rao, Amol P. Jadhav, Dnyaneshwar Garad, Ravi P. Singh, Org. Lett., 2014. Click here
2011
2011
11.Cinchona Alkaloid-Catalyzed Enantioselective Amination of α,β-Unsaturated Ketones: An Asymmetric Approach to Δ2-Pyrazolines. Nathaniel R. Campbell, Bingfeng Sun, Ravi P. Singh, Li Deng Adv. Synth. Catal. 2011, 353, 3123 – 3128 Click here
10.Asymmetric Olefin Isomerization of Butenolides via Proton Transfer Catalysis by an Organic Molecule. Yongwei Wu , Ravi P. Singh, and Li Deng J. Am. Chem. Soc. 2011, 133, 32, 12458–12461 Click here
9.Asymmetric [4 + 2] additions with aliphatic nitroalkenes. Keith J. Bartelson, Ravi P. Singh, Bruce M. Foxman and Li Deng Chem. Sci., 2011, 2, 1940-1944 Click here
8."Cinchona Alkaloid Organocatalysts" Science Of Synthesis, Houben-Weyl Methods of Molecular Transformations,2011,Vol 2. Asymmetric Organocatalysis, Marouka, K.Ed.George Thieme Verlag, Chapter 2.1.2 Ravi P. Singh; Li Deng
2010
2010
7.Asymmetric Vinylogous Aldol Reaction of Silyloxy Furans with a Chiral Organic Salt. Ravi P. Singh, Bruce M. Foxman, and Li Deng J. Am. Chem. Soc. 2010, 132, 28, 9558–9560 Click here
6.Enantioselective Synthesis of a Chiral C3-Symmetric Bridgehead Amine. Xuri Gao, Ravi P. Singh, and E. J. Corey Org. Lett. 2010, 12, 8, 1812–1814 Click here
2008
2008
5.Enantioselective Diels−Alder Reaction of Simple α,β-Unsaturated Ketones with a Cinchona Alkaloid Catalyst. Ravi P. Singh, Keith Bartelson, Yi Wang, Heng Su, Xiaojie Lu, and Li Deng J. Am. Chem. Soc. 2008, 130, 8, 2422–2423 Click here
2006
2006
4.Asymmetric synthesis of (D)-cardiobutanolide. Ashish Garg, Ravi P. Singh and Vinod K. Singh Tetrahedron Letters ,2006,62, 11240-11244 Click here
2005
2005
3.Synthesis of Mannich type products via a three-component coupling reaction. Ghanshyam Pandey, Ravi P. Singh, Ashish Garg and Vinod K. Singh Tetrahedron Letters ,2005,46,2137–2140 Click here
2004
2004
2.Facile One-Step Synthesis of β-Alkoxy Lactone via Sequential Lactonization and 1,4-Addition of Alkoxide Group: Total Synthesis of All Stereoisomers of Dihydrokawain-5-ol. Ravi P. Singh and Vinod K. Singh J. Org. Chem. 2004, 69, 10, 3425–3430 Click here
2001
2001
1.An efficient method for aromatic Friedel–Crafts alkylation, acylation, benzoylation, and sulfonylation reactions Ravi P. Singh, Rajesh M. Kamble, Kusum L. Chandra, P. Saravanan and Vinod K. Singh Tetrahedron 2001 ,57 , 241-247 Click here
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