Several oxazoles and thiazoles were synthesized easily by the reaction of N-(methylthioalkylidene)glycine ethyl ester with diethyl oxalate, acid halides, and thionesters in the presence of base.
Nickel/Photoredox-Catalyzed Amidation via Alkylsilicates and Isocyanates
作者:Shuai Zheng、David N. Primer、Gary A. Molander
DOI:10.1021/acscatal.7b02795
日期:2017.11.3
A nickel/photoredox, dual-catalyzed amidationreaction between alkylsilicate reagents and alkyl/aryl isocyanates is reported. In contrast to the previously reported reductive coupling process, this protocol is characterized by mild reaction conditions and the absence of a stoichiometric reductant. A mechanistic hypothesis involving a nickel-isocyanate adduct is proposed based on literature precedent