Bulletin of the Chemical Society of Japan

Diphenyl (2, 3-Dihydro-2-thioxo-3-benzoxazolyl) phosphonate: A New, Reactive Condensing Agent for the Synthesis of Amides, Esters, Peptides, and. BETA.-Lactams …

M Ueda, H Mori

Index: Ueda; Mori Bulletin of the Chemical Society of Japan, 1992 , vol. 65, # 6 p. 1636 - 1641

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Citation Number: 19

Abstract

Diphenyl (2, 3-dihydro-2-thioxo-3-benzoxazolyl) phosphonate (1) prepared from 2- benzoxazolethiol and diphenyl phosphorochloridate was proved to be a very useful condensing agent. A variety of amides, esters, and dipeptides were obtained in excellent yields. Furthermore, this reagent was successfully applied to the synthesis of β-lactams from β-amino acids.