α, β-Unsaturated acyl cyanide synthesis via triethylamine catalyzed redox cyanation

HH Choi, YH Son, MS Jung, EJ Kang

Index: Choi, Hyung Ho; Son, Young Hoon; Jung, Min Seok; Kang, Eun Joo Tetrahedron Letters, 2011 , vol. 52, # 18 p. 2312 - 2315

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Citation Number: 8

Abstract

Stereoselective redox cyanation of alkynyl aldehydes was explored, furnishing (E)-α, β- unsaturated acyl cyanides. This reaction was catalyzed by mild TEA base, as a dual role of Lewis base and Brönsted base. TMSCN treated with TEA was an effective reagent for generating umpolung intermediates from alkynyl aldehydes, and this nucleophilic intermediate can be protonated by equimolar amount of EtOH, promoting the efficient ...