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Organocatalytic Access to 3-Pyridylphosphonates from Vinyl Phosphonates and Aldehydes
R. S. Verma, A. K. Khatana, D. Verma, and Bhoopendra Tiwari*
Iodobenzene Catalyzed Synthesis of Fully Functionalized NH-Pyrazoles and Isoxazoles from α,β- Unsaturated Hydrazones and Oximes via 1,2-Aryl Shift
Vikram Singh, Deepak Kumar, Balkrishna Mishra and Bhoopendra Tiwari*
Amidation of Enones via Beckmann Rearrangement
Saumya Verma, Vikram Singh, Jawahar L. Jat, and Bhoopendra Tiwari*
J. Org. Chem. 2024, 89, In Press
Copper(ii) nanodots stabilized on Cassia fistula galactomannan: preparation and catalytic application towards fast solvent-free Biginelli reactions
Bal Dev Singh, Jyoti Pandey, Huda Khanam, Tazeen Azaz, and Bhoopendra Tiwari*
Construction of Highly Functionalized C4-Oxyacylated and Aminated Pyrazolines
Vikram Singh, Balkrishna Mishra, Deepak Kumar and Bhoopendra Tiwari*
Cassia fistula galactomannan
J. Pandey, B. Singh, H. Khana
N-Heterocyclic Carbene-Catalyzed Enantioselective [3 + 2] Annulation of Enals with Vinyl Ketones
Tazeen Azaz, Hemlata Mourya, Vikram Singh, Bali Ram and Bhoopendra Tiwari*
Reductive Alkenylation of Ketimines via Hydride Transfer from Aldehydes
Tazeen Azaz, Hemlata Mourya, Vikram Singh, Bali Ram and Bhoopendra Tiwari*
Metal-free synthesis of nitriles from aldehydes using N-Boc-O-tosylhydroxylamine as a nitrogen source
Puneet Kumar, Vikram Singh, Jawahar Lal Jat* and Bhoopendra Tiwari*
Novel Functionalized Spiro [Indoline-3,5′-pyrroline]-2,2′
M. Asif, S. S. Alvi, T. Azaz, A. R. Khan, Bhoopendra Tiwari, B. B. Hafeez and M. Nasibullah
Propagative isatin in organic synthesis of spirooxindoles through catalysis (Review)
Mohd Asif, Tazeen Azaz, Bhoopendra Tiwari, Malik Nasibullah
Carbene Catalyzed Asymmetric Synthesis of Selenylated δ-Lactones via [4+2] Annulation of Selenyl Vinyl Ketones and Enals
Ram Subhawan Verma, Ranadeep Talukdar, Tazeen Azaz and Bhoopendra Tiwari*
Metal-free synthesis of secondary amides using N-Boc-O-tosylhydroxylamine as nitrogen source via Beckmann rearrangement
Jawahar Lal Jat,* Puneet Kumar, Soumya Verma, Dinesh Chandra, Vikram Singh and Bhoopendra Tiwari*
Metal and Additive-Free Intermolecular Aziridination of Olefins Using N-Boc-O-Tosylhydroxylamine
Jawahar Lal Jat,* Dinesh Chandra, Puneet Kumar, Vikram Singh and Bhoopendra Tiwari*
Direct N-Me Aziridination of Enones
Jawahar Lal Jat,* Ajay K. Yadav, Chandra Bhan Pandey, Dinesh Chandra and Bhoopendra Tiwari*
Catalytic Enantioselective Syn-Hydroxy-Oxyacylation of Electron Deficient Alkenes
Chandra Bhan Pandey, Vikram Singh, Susanta Ghanta and Bhoopendra Tiwari*
A General Method for α-Oxyacylation of Vinyl Ketones Using Koser’s Reagent
Chandra Bhan Pandey, Bal Krishna Mishra, Tazeen Azaz, Hemlata Mourya, Bali Ram, and Bhoopendra Tiwari*
Carbene Catalyzed Access to 3,6-Disubstituted α-Pyrones via Michael Addition/Lactonization/Elimination Cascade
Anil Kumar Khatana, Vikram Singh, Manoj Kumar Gupta and Bhoopendra Tiwari*
Stitching Triazoles to Arenes via a Transition Metal-Free Aryne Diels-Alder/1,3-Prototropic Shift/Dehydrobromination Cascade
Ranadeep Talukdar, Vikram Singh, Hemlata Mourya, Malik Nassibullah and Bhoopendra Tiwari*
Fe(II)-Catalyzed Synthesis of Unactivated Aziridines (N-H/N-Me) from Olefins Using O-Arylsulfonyl Hydroxylamines
Dinesh Chandra, Ajay K. Yadav, Vikram Singh, Bhoopendra Tiwari* and Jawahar L. Jat*
Access to enantioenriched 4-phosphorylated δ-lactones from β-phosphorylenones and enals via carbene organocatalysis
Ram Subhawan Verma, Anil K. Khatana, Monika Mishra, Shailesh Kumar and Bhoopendra Tiwari*
Stereoselective Oxidative Rearrangement of Di-Substituted Unactivated Alkenes Using Hypervalent Iodine(III) Reagent
Chandra Bhan Pandey, Tazeen Azaz, Ram S. Verma, Monika Mishra, Jawahar L. Jat and Bhoopendra Tiwari*
Global Access to 3/4-Phosphorylated Heterocycles via a Carbene-Catalyzed Stetter Reaction of Vinylphosphonates and Aldehydes
Ram Subhawan Verma, Monika Mishra, Chandra Bhan Pandey and Bhoopendra Tiwari*
Direct Synthesis of Secondary Amides from Ketones through Beckmann Rearrangement using O-(Mesitylsulfonyl)Hydroxylamine
Dinesh Chandra, Soumya Verma, Chandra Bhan Pandey, Ajay K. Yadav, Puneet Kumar, Bhoopendra Tiwari* and Jawahar L. Jat*
Zinc(II)-Catalyzed Synthesis of Secondary Amides from Ketones via Beckmann Rearrangement Using Hydroxylamine-O-sulfonic Acid in Aqueous Media
Soumya Verma, Puneet Kumar, Anil K. Khatana, Dinesh Chandra, Ajay K. Yadav, Bhoopendra Tiwari* and Jawahar L. Jat*
Synthesis, 2020, 85, 8166-8175 [ Invited Contribution]
Carbene/Base-Mediated Redox Alkenylation of Isatins using β-Substituted Organoselenones and Aldehydes
Atanu Bhaumik, Tazeen Azaz, Vikram Singh, Anil K. Khatana and Bhoopendra Tiwari*
Construction of Phenanthrenes and Chrysenes from β-Bromovinylarenes via Aryne Diels–Alder Reaction/Aromatization
Vikram Singh, Ram Subhawan Verma, Anil K. Khatana and Bhoopendra Tiwari*
Direct N-H/N-Me Aziridination of Unactivated Olefins Using O-(Sulfonyl)hydroxylamines as Aminating Agents
Shekh Sabir, Chandra Bhan Pandey, Ajay K. Yadav, Bhoopendra Tiwari* and Jawahar L. Jat*
A Highly Efficient NHC-Catalyzed Aerobic Oxidation of Aldehydes to Carboxylic Acids
Anil K. Khatana, Vikram Singh, Manoj Kumar Gupta and Bhoopendra Tiwari*
Synthesis 2018, 50, 4290-4294 [ Invited Contribution]
Carbene-Catalyzed Tandem [1,2]-Phospha-Brook/[1,4]-Phosphate Rearrangement: Access to α-Ketophosphates via Controlled Cross-Acyloin Condensation
Ram Subhawan Verma, Chandra Bhan Pandey, Shailesh Kumar and Bhoopendra Tiwari*
Direct Construction of 2,3-Dihydroxy-2,3-diaryltetrahydrofurans via N-Heterocyclic Carbene/Base-Mediated Domino Reactions of Aromatic Aldehydes and Vinyl Selenone
Atanu Bhaumik, Ram Subhawan Verma and Bhoopendra Tiwari*
Catalytic Activation of Carbohydrates as Formaldehyde Equivalents for Stetter Reaction with Enones
J. Zhang, C. Xing, B. Tiwari, Y. R. Chi
J. Am. Chem. Soc. 2013, 135, 8113–8116 [The Most read article of June 2013]
Asymmetric Access to the Smallest Enolate Intermediate via Organocatalytic Activation of Acetic Ester
S. Chen, L. Hao, Y. Zhang, B. Tiwari, Y. R. Chi
Organocatalytic Activation of α-Alkyl Carboxylic Esters as Enolate Precursors to React with α,β-Unsaturated Imines
L. Hao, S. Chen, J. Xu, B. Tiwari, Z. Fu, Y. R. Chi
Controlled β-Protonation and [4+2] Cycloaddition of Enals and Chalconesvia N-Heterocyclic Carbene/Acid Catalysis: Toward Substrate Independent Reaction Control
Z. Fu, H. Sun, S. Chen, B. Tiwari, G. Li, Y. R. Chi
Chem. Commun. 2013, 49, 261–263 [Highlighted in Synfacts]
Direct α-Functionalization of Simple Aldehydes via Oxidative N-Heterocyclic Carbene Catalysis
J. Mo, R. Yang, X. Chen, B. Tiwari, Y. R. Chi
Org. Lett. 2013, 15, 50–53 [Among top 5 most read articles of the month]
Enantioselective Oxidative Cross‐Dehydrogenative Coupling of Tertiary Amines to Aldehydes
J. Zhang, B. Tiwari, C. Xing, X. Chen, Y. R. Chi
Facile Access to Chiral Ketones through Metal-free Oxidative C-C Bond Cleavage of Aldehydes by O2
B. Tiwari, J. Zhang, Y. R. Chi
Highly Enantioselective Addition of Enals to Isatin-Derived Ketimines Catalyzed by N-Heterocyclic Carbenes: Synthesis of Spirocyclic γ-Lactams
H. Lv, B. Tiwari, J. Mo, X. Chong, Y. R. Chi
Org. Lett. 2012, 14, 5412–5415 [Highlighted in Synfacts]
Enantioselective Intramolecular Formal [2+4] Annulation of Acrylates and α,β– Unsaturated Imines Catalyzed by Amino Acid-Derived Phosphines
Z. Jin, R. Yang, Y. Du, B. Tiwari, R. Ganguly, Y. R. Chi
Access to Spirocyclic Oxindoles via N-Heterocyclic Carbene-Catalyzed Reactions of Enals and Oxindoles-Derived α,β-Unsaturated Imines
K. Jiang, B. Tiwari, Y. R. Chi
Addition of Indoles to Oxyallyl Cations for Facile Access to α-Indole Carbonyl Compounds
Q. Tang, X. Chen, B. Tiwari, Y. R. Chi
Synthesis of the C10-C24 fragment of (+)-Cannabisativine
S. Chandrasekhar, B. Tiwari
Chiral pyrrolidine-triazole conjugate catalyst for asymmetric Michael and Aldol reactions
S. Chandrasekhar, B. Tiwari, B. B. Parida, C. R. Reddy
Asymmetric synthesis of a protected dihydroxy piperazic acid derivative
S. Chandrasekhar, G. Parimala, B. Tiwari, C. Narsihmulu, G. D. Sarma
Concise synthesis of truncated pachastrissamine (jaspine B) and its enantiomer
S. Chandrasekhar, B. Tiwari, S. J. Prakash
A process for the synthesis of α,β-unsaturated amides
Jawahar L. Jat, Soumya Verma, Vikram Singh and Bhoopendra Tiwari
Method for Metal-Free Synthesis of Secondary Amides using N-Boc-O-Tosylhydroxylamine as Nitrogen Source via Beckmann Rearrangement
Jawahar L. Jat, Puneet Kumar, Soumya Verma, Dinesh Chandra, Vikram Singh and Bhoopendra Tiwari
Novel Method for Metal-Free Synthesis of Nitriles from Aldehydes using N-Boc-O-Tosylhydroxylamine as Nitrogen Source
Puneet Kumar, Vikram Singh, Jwahar L. Jat and Bhoopendra Tiwari
Methods of Preparing Chiral Ketones from Aldehydes
Bhoopendra Tiwari and Yonggui R. Chi
Indian patent (2013), WO 2013095301 A1 20130627