Saumen Hajra

ORCID

Publication Activity (10 Years)

Years Active: 2017-2023
Publications (10 Years): 22

Top Venues

Organic letters

The Journal of organic chemistry

Organic & biomolecular chemistry

Chemistry (Weinheim an der Bergstrasse, Germany)

Centre of Biomedical Research, SGPGIMS Campus

National Chemical Laboratory CSIR (PHD)

This page only lists publications with an associated author ORCID identifier.

Affiliation History

Centre of Biomedical Research, SGPGIMS Campus Jun 01 2014

India

Professor

Indian Institute of Technology Kharagpur Aug 18 2000 - May 31 2015

India

Faculty :: Chemistry

University of Wuerzburg Mar 01 1999 - Apr 30 2000

Germany

Alexander von Humboldt Fellow :: Organic Chemistry

North Dakota State University Nov 15 1997 - Dec 10 1998

United States

Post Doctoral Fellow :: Chemistry

Education History

National Chemical Laboratory CSIR Feb 03 1992

India

PHD :: Organic Synthesis-I

Publications

Biswajit Sen, Mainak Bera, Maya Shankar Singh, Saumen Hajra
Asymmetric total synthesis of (+)-propolisbenzofuran B. Chemical communications (Cambridge, England) (2023)
Mainak Bera, Biswajit Sen, Sujay Garai, Saumen Hajra
Organocatalytic aldol approach for the protecting group-free asymmetric synthesis of (7 R ')-parabenzlactone, (-)-hinokinin, (-)-yatein, (-)-bursehernin, (-)-pluviatolide, (+)-isostegane and allied lignans. Organic & biomolecular chemistry (2023)
Biswajit Sen, Saikat Roy, Sujay Garai, Sayan Roy, Anakuthil Anoop, Saumen Hajra
Stereochemistry of the Benzylidene γ-Butyrolactone Dictates the Reductive Heck Cyclization Mode in the Asymmetric Synthesis of Aryltetralin Lignans: A Detailed Experimental and Theoretical Study. The Journal of organic chemistry 87 (6) (2022)
Sk Abu Saleh, Atanu Hazra, Maya Shankar Singh, Saumen Hajra
Selective C3-Allylation and Formal [3 + 2]-Annulation of Spiro-Aziridine Oxindoles: Synthesis of 5'-Substituted Spiro[pyrrolidine-3,3'-oxindoles] and Coerulescine. The Journal of organic chemistry 87 (13) (2022)
Ramkrishna Maity, Saumen Hajra
Asymmetric Total Synthesis of Eupalinilide E, a Promoter of Human HSPC Expansion. Organic letters 24 (26) (2022)
Anurag Biswas, S K Abu Saleh, Atanu Hazra, Subhas Chandra Debnath, Saumen Hajra
Sequential one-pot synthesis of N-sulfonyl spiroaziridine oxindoles from spiroepoxy oxindoles. Organic & biomolecular chemistry 19 (25) (2022)
Saumen Hajra, Sayan Roy
Feedback Inhibition in Chemical Catalysis Leads the Dynamic Kinetic to Kinetic Resolution in C3-Indolylation of Spiro-epoxyoxindoles. Organic letters 22 (4) (2020)
Saumen Hajra, Anurag Biswas
Catalyst-Free Stereocontrolled Formal [3 + 2]-Cycloaddition of CO2 for the Synthesis of Enantiopure Spiro[indoline-3,5'-oxazolidine]-2,2'-diones under Aqueous and Ambient Conditions. Organic letters 22 (13) (2020)
Saumen Hajra, S K Abu Saleh, Atanu Hazra, Maya Shankar Singh
Organocatalytic Domino Reaction of Spiroaziridine Oxindoles and Malononitrile for the Enantiopure Synthesis of Spiro[dihydropyrrole-3,3'-oxindoles]. The Journal of organic chemistry 84 (12) (2019)
Saumen Hajra, Sujay Laskar, Bibekananda Jana
Organocatalytic Enantioselective Mukaiyama-Mannich Reaction of Isatin-Derived Ketimines for the Synthesis of Oxindolyl-β3, 3 -Amino Acid Esters. Chemistry (Weinheim an der Bergstrasse, Germany) 25 (64) (2019)
Saumen Hajra, Subrata Maity, Sayan Roy, Dhiraj Das
Controlling the regioselectivity of the ring opening of spiro-epoxyoxindoles for efficient synthesis of C(3)-N(1')-bisindoles and C(3)-N(1')-diindolylmethane. Organic & biomolecular chemistry 17 (33) (2019)
Saumen Hajra, Suhas Shivajirao Bhosale, Atanu Hazra, Nikhil Kanaujia
The one pot asymmetric synthesis of 3,3'-pyrrolidonyl spiroxindoles via a regio- and stereoselective domino reaction. Organic & biomolecular chemistry 17 (35) (2019)
Saumen Hajra, Atanu Hazra, Sk Abu Saleh, Ananda Shankar Mondal
Aqueous tert-Butyl Hydroperoxide Mediated Regioselective Ring-Opening Reactions of Spiro-aziridine-epoxy Oxindoles: Synthesis of 3-Peroxy-3-substituted Oxindoles and Their Acid-Mediated Rearrangement. Organic letters 21 (24) (2019)
Saumen Hajra, Atanu Hazra, S K Abu Saleh
One-Pot Synthesis of Enantiopure Spiro[3,4-dihydrobenzo[b][1,4]oxazine-2,3'-oxindole] via Regio- and Stereoselective Tandem Ring Opening/Cyclization of Spiroaziridine Oxindoles with Bromophenols. The Journal of organic chemistry 84 (16) (2019)
Saumen Hajra, Sayan Roy, Subrata Maity, Sandip Chatterjee
Reagent-Controlled Reversal of Regioselectivity in Nucleophilic Fluorination of Spiro-epoxyoxindole: Synthesis of 3-Fluoro-3-hydroxymethyloxindole and 3-Aryl-3-fluoromethyloxindole. The Journal of organic chemistry 84 (4) (2019)
Saumen Hajra, Sayan Roy, Sk Abu Saleh
Domino Corey-Chaykovsky Reaction for One-Pot Access to Spirocyclopropyl Oxindoles. Organic letters 20 (15) (2018)
Saumen Hajra, Atanu Hazra, Paltu Mandal
Stereocontrolled Nucleophilic Fluorination at the Tertiary sp3-Carbon Center for Enantiopure Synthesis of 3-Fluorooxindoles. Organic letters 20 (20) (2018)
Saumen Hajra, Somnath Singha Roy, Anurag Biswas, Sk Abu Saleh
Catalyst-Free Ring Opening of Spiroaziridine Oxindoles by Heteronucleophiles: An Approach to the Synthesis of Enantiopure 3-Substituted Oxindoles. The Journal of organic chemistry 83 (7) (2018)
Saumen Hajra, Somnath Singha Roy, Sk Mohammad Aziz, Dhiraj Das
Catalyst-Free "On-Water" Regio- and Stereospecific Ring-Opening of Spiroaziridine Oxindole: Enantiopure Synthesis of Unsymmetrical 3,3'-Bisindoles. Organic letters 19 (15) (2017)
Saumen Hajra, Sujay Garai, Sunit Hazra
Catalytic Enantioselective Synthesis of (-)-Podophyllotoxin. Organic letters 19 (24) (2017)
Saumen Hajra, Sayan Roy, Subrata Maity
Reversal of Selectivity in C3-Allylation and Formal [3 + 2]-Cycloaddition of Spiro-epoxyoxindole: Unified Synthesis of Spiro-furanooxindole, (±)-N-Methylcoerulescine, (±)-Physovenine, and 3a-Allylhexahydropyrrolo[2,3-b]indole. Organic letters 19 (8) (2017)
Saumen Hajra, Bibekananda Jana
Quinine-Based Trifunctional Organocatalyst for Tandem Aza-Henry Reaction-Cyclization: Asymmetric Synthesis of Spiroxindole-Pyrrolidine/Piperidines. Organic letters 19 (18) (2017)

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Publication Activity (10 Years)

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Saumen Hajra