Direct N-Me Aziridination of Enones
Jawahar Lal Jat, Ajay K. Yadav, Chandra Bhan Pandey, Dinesh Chandra 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, Vikram Singh, Puneet Kumar 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*, 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, C. B. Pandey, A. K. Yadav, P. Kumar, Bhoopendra Tiwari*, 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, P. Kumar, Anil K. Khatana, D. Chandra, A. K. Yadav, Bhoopendra Tiwari* and Jawahar L. Jat*
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 Shabir, 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*
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]
![Graphical abstract: Controlled β-protonation and [4+2] cycloaddition of enals and chalcones via N-heterocyclic carbene/acid catalysis: toward substrate independent reaction control](https://pubs.rsc.org/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C2CC36564B&imageInfo.ImageIdentifier.Year=2013)
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
Tetrahedron: Asymmetry 2009, 20, 1924–1929
Chiral pyrrolidine-triazole conjugate catalyst for asymmetric Michael and Aldol reactions
S. Chandrasekhar, B. Tiwari, B. B. Parida, C. R. Reddy
Tetrahedron: Asymmetry 2008, 19, 495–499
Asymmetric synthesis of a protected dihydroxy piperazic acid derivative
S. Chandrasekhar, G. Parimala, B. Tiwari, C. Narsihmulu, G. D. Sarma
Synthesis 2007, 11, 1677–1682
Concise synthesis of truncated pachastrissamine (jaspine B) and its enantiomer
S. Chandrasekhar, B. Tiwari, S. J. Prakash
ARKIVOC 2006, (xi), 155–159
Patent
Methods of preparing chiral Ketones from aldehydes
B. Tiwari, Y. R. Chi, PCT Int. Appl. (2013), WO 2013095301 A1 20130627