U
Ulaganathan Sankar
Researcher at Pachaiyappa's College
Publications - 10
Citations - 33
Ulaganathan Sankar is an academic researcher from Pachaiyappa's College. The author has contributed to research in topics: Cycloaddition & Pyrrolidine. The author has an hindex of 3, co-authored 9 publications receiving 23 citations.
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Journal ArticleDOI
Stereo-, Regio-, and Chemoselective [3 + 2]-Cycloaddition of (2E,4E)-Ethyl 5-(Phenylsulfonyl)penta-2,4-dienoate with Various Azomethine Ylides, Nitrones, and Nitrile Oxides: Synthesis of Pyrrolidine, Isoxazolidine, and Isoxazoline Derivatives and a Computational Study
Ulaganathan Sankar,Ch. Venkata Surya Kumar,Venkatesan Subramanian,Kalpattu K. Balasubramanian,S. Mahalakshimi +4 more
TL;DR: One-pot chemo-, regio-, and stereoselective synthesis of series of heterocyclic and spiroheterocyclIC compounds was accomplished through mono- and bis[3 + 2]-cycloaddition reactions of (2E,4E)-ethyl 5-(phenylsulfonyl)penta-2,4-dienoate as a dipolarophile with azomethine ylides, nitrones, and nitrile oxides
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Cesium carbonate mediated exclusive dialkylation of active methylene compounds
TL;DR: In this paper, active methylene compounds are regioselectively dialkylated by a variety of alkyl halides using cesium carbonate in quantitative yield.
Journal ArticleDOI
A One-Pot Stereoselective Synthesis of Electron-Deficient 4-Substituted (E,E)-1-Arylsulfonylbuta-1,3-dienes and Their Chemoselective [3+2] Cycloaddition with Azomethine Ylides – A Simple Synthesis of 1,3,4-Trisubstituted Pyrrolidines and Pyrroles
TL;DR: In this paper, a simple and efficient method for the synthesis of (E,E)-1-(arylsulfonyl)buta-1,3-dienes bearing electron-withdrawing substituents like cyano and ethoxycarbonyl at position 4, involving a one-pot alkylation of bis(phenylsulfonyls)methane with trans-ethyl 4-bromocrotonate/trans-4-branched bromocronitrile, and elimination of arylsulfinic acid,
Journal ArticleDOI
(2E,4E)-Ethyl 5-(phenyl-sulfon-yl)penta-2,4-dienoate.
TL;DR: In the title compound, C13H14O4S, both C=C double bonds adopt an E conformation as mentioned in this paper, and they are linked into centrosymmetric R22(14) dimers via pairs of C-H⋯O hydrogen bonds.
Journal ArticleDOI
A One-Pot Stereoselective Synthesis of Electron-Deficient 4-Substituted (E,E)-1-Arylsulfonylbuta-1,3-dienes and Their Chemoselective [3 + 2] Cycloaddition with Azomethine Ylides — A Simple Synthesis of 1,3,4-Trisubstituted Pyrrolidines and Pyrroles.
TL;DR: Substrates (I) undergo alkylative elimination upon treatment with bromides (II) to afford (E,E)-1,3-dienes (III) as mentioned in this paper.