Stereospecific Opening and Cyclization of the Strained Ring Systems for the Synthesis of Six-Membered Heterocycles
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2022
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Abstract
The thesis is divided into four chapters. The first chapter describes the general introduction to the opening and cyclization of the strained ring system for the synthesis of six-membered heterocycles. The second chapter focuses on the synthesis of piperazines and tetrahydropyrazines through stereospecific ring-opening and cycloisomerization of aziridines with N-propargylamines. Third chapter covers stereospecific synthesis of substituted 1,4-oxazine via Zn/Ag Relay catalyzed ring opening/hydroalkoxylation of oxiranes with N-propargylamines. Chapter four deals with the stereospecific assembly of tetrahydroquinolines via tandem ring-opening/oxidative cyclization of donor-acceptor cyclopropanes with N-alkyl anilines.
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Supervisor: Punniyamurthy, T