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
探索了炔醛的立体选择性氧化还原氰化,提供了(E)-α,β-不饱和酰基氰。该反应是由温和的TEA碱催化的,这是Lewis碱和Brönsted碱的双重作用。经TEA处理的TMSCN是一种有效的试剂,可从炔基醛生成umpolung中间体,并且该亲核中间体可以被等摩尔量的EtOH质子化,从而促进了向α,β-不饱和酰基氰化物的高效转化。合成的酰基氰化物已成功地用作铁催化的芳基化反应的合成前体。