α,β-Unsaturated acyl cyanide synthesis via triethylamine catalyzed redox cyanation
作者:Hyung Ho Choi、Young Hoon Son、Min Seok Jung、Eun Joo Kang
DOI:10.1016/j.tetlet.2011.02.063
日期:2011.5
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