作者:Ken Cheng、Andrew McClory、Whitney Walker、Jie Xu、Haiming Zhang、Remy Angelaud、Francis Gosselin
DOI:10.1016/j.tetlet.2015.12.069
日期:2016.4
A general approach to 2-substituted ethyl 5-aminothiazole-4-carboxylates is reported herein. Both aliphatic and aromatic thioamides undergo 1,2-addition to ethyl glyoxylate to give hemiaminals which, when treated with acetyl chloride, undergo elimination to the corresponding imines. Upon exposure to aqueous sodium cyanide the imines undergo a Strecker addition-cyclization reaction to provide the target heterocycles in modest to good yields over the 3-step process. (C) 2016 Published by Elsevier Ltd.