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Sudipta Ponra
Sudipta Ponra
Postdoctoral Research Associate, CHIMIE PARISTECH, ECOLE NATIONALE SUPERIEURE DE CHIMIE DE PARIS, 11
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Asymmetric preparation of polysubstituted cyclopentanes by synergistic Pd (0)/amine catalyzed formal [3+ 2] cycloadditions of vinyl cyclopropanes with enals
M Laugeois, S Ponra, V Ratovelomanana-Vidal, V Michelet, MR Vitale
Chemical communications 52 (30), 5332-5335, 2016
912016
One-pot efficient green synthesis of spirooxindole-annulated thiopyran derivatives via Knoevenagel condensation followed by Michael addition
KC Majumdar, S Ponra, RK Nandi
Tetrahedron Letters 53 (14), 1732-1737, 2012
482012
HNTf2-Catalyzed Regioselective Preparation of Polysubstituted Naphthalene Derivatives Through Alkyne–Aldehyde Coupling
S Ponra, MR Vitale, V Michelet, V Ratovelomanana-Vidal
The Journal of Organic Chemistry 80 (6), 3250-3257, 2015
462015
Brønsted acid-promoted synthesis of common heterocycles and related bio-active and functional molecules
S Ponra, KC Majumdar
RSC advances 6 (44), 37784-37922, 2016
452016
Green approach to highly functionalized thiopyrano derivatives via domino multi-component reaction in water
KC Majumdar, S Ponra, T Ghosh
RSC advances 2 (3), 1144-1152, 2012
442012
Catalyst-free domino-Knoevenagel-hetero-Diels–Alder reaction of terminal alkynes in water: an efficient one-step synthesis of indole-annulated thiopyranobenzopyran derivatives
KC Majumdar, A Taher, S Ponra
Tetrahedron Letters 51 (1), 147-150, 2010
402010
Recent developments in transition-metal-catalyzed asymmetric hydrogenation of enamides
S Ponra, B Boudet, P Phansavath, V Ratovelomanana-Vidal
Synthesis 53 (02), 193-214, 2021
392021
A reductive Mizoroki–Heck approach to dibenzo [b, e] oxepine
KC Majumdar, T Ghosh, S Ponra
Tetrahedron Letters 54 (35), 4661-4665, 2013
382013
Catalyst-free regioselective synthesis of benzopyran-annulated thiopyrano [2, 3-b] thiochromen-5-(4H)-one derivatives by domino-Knoevenagel-hetero-Diels–Alder reaction of …
KC Majumdar, A Taher, S Ponra
Tetrahedron Letters 51 (17), 2297-2300, 2010
382010
Synthesis of quinoline based heterocyclic compounds for blue lighting application
V Kumar, M Gohain, JH Van Tonder, S Ponra, BCB Bezuindenhoudt, ...
Optical Materials 50, 275-281, 2015
352015
Efficient one-pot synthesis of substituted 4, 7-phenanthroline, pyrano-[3, 2-f] quinoline and pyrano [3, 2-g] quinoline derivatives by aza-diels-alder reaction
KC Majumdar, S Ponra, D Ghosh, A Taher
Synlett 2011 (01), 104-110, 2011
332011
Diastereo-and enantioselective synthesis of fluorine motifs with two contiguous stereogenic centers
S Ponra, W Rabten, J Yang, H Wu, S Kerdphon, PG Andersson
Journal of the American Chemical Society 140 (42), 13878-13883, 2018
322018
Asymmetric synthesis of alkyl fluorides: hydrogenation of fluorinated olefins
S Ponra, J Yang, S Kerdphon, PG Andersson
Angewandte Chemie 131 (27), 9383-9388, 2019
292019
An improved environmentally friendly approach to 4-nitro-, 4-sulfonyl-, and 4-aminoquinolines and 4-quinolones through conjugate addition of nucleophiles to β-(2-aminophenyl)-α …
ND Rode, A Arcadi, M Chiarini, F Marinelli
Synthesis 49 (11), 2501-2512, 2017
282017
A new efficient method for the synthesis of 3, 4-dihydro-2H-1, 4-benzoxazines via iodocyclization
KC Majumdar, K Ray, S Ponra
Tetrahedron Letters 51 (41), 5437-5439, 2010
272010
Al (OTf) 3-Catalyzed Preparation of 4-Hydroxy-3-propargylic Coumarins and Subsequent Regioselective Cyclization towards Furo-or Pyrano [3, 2-c] coumarins
S Ponra, M Gohain, JH van Tonder, BCB Bezuidenhoudt
Synlett 26 (06), 745-750, 2015
262015
Diastereo-and enantioselective synthesis of structurally diverse succinate, butyrolactone, and trifluoromethyl derivatives by iridium-catalyzed hydrogenation of …
S Kerdphon, S Ponra, J Yang, H Wu, L Eriksson, PG Andersson
ACS Catalysis 9 (7), 6169-6176, 2019
242019
Iridium-catalysed enantioselective formal deoxygenation of racemic alcohols via asymmetric hydrogenation
J Zheng, J Jongcharoenkamol, BBC Peters, J Guhl, S Ponra, ...
Nature Catalysis 2 (12), 1093-1100, 2019
192019
Copper (I)-Catalyst-Free Approach for the Synthesis of Chromene-Fused Pyrido [3, 2-d] pyrimidines by Lewis Acid Catalyzed Aza-Diels-Alder Reaction
KC Majumdar, S Ponra, S Ganai
Synlett 2010 (17), 2575-2578, 2010
182010
Unusual product from condensative cyclization: Pyrano [3, 2-f] quinolin-3, 10-diones from 6-amino-5-[(trimethylsilyl) ethynyl]-2H-chromen-2-one and aryl aldehydes
KC Majumdar, A Taher, S Ponra
Synlett 2010 (05), 735-740, 2010
172010
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Artiklar 1–20