New Methods for Stereoselective Synthesis of α-Alkylidene-γ-butyrolactones Using Monoanion of O-Ethyl S-(Tetrahydro-2-oxo-3-furanyl) Thiocarbonate and Dianion …

…, H Uneme, N Yamagishi, R Tanikaga, A Kaji

Index: Tanaka, Kazuhiko; Uneme, Hideki; Yamagishi, Nobuyuki; Tanikaga, Rikuhei; Kaji, Aritsune Bulletin of the Chemical Society of Japan, 1980 , vol. 53, # 10 p. 2910 - 2916

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Citation Number: 20

Abstract

The lithium enolates of O-ethyl S-(tetrahydro-2-oxo-3-furanyl) dithiocarbonate and thiocarbonate were found to be efficient reagents for the stereoselective synthesis of α- alkylidene-γ-butyrolactones from carbonyl compounds. The dianion of α-mercapto-γ- ...