Solvent-Controlled Synthesis of Thiocyanated Enaminones and 2-Aminothiazoles from Enaminones, KSCN, and NBS
作者:Xiyan Duan、Xiaojing Liu、Xiaodan Cuan、Lin Wang、Kun Liu、Huiyun Zhou、Xue Chen、Huimin Li、Junqin Wang
DOI:10.1021/acs.joc.9b01722
日期:2019.10.4
and simple solvent-controlled synthesis of thiocyanated enaminones and 2-aminothiazoles has been demonstrated from enaminones, potassium thiocyanate, and N-bromosuccinimide. This process features mild reaction conditions, simple and easy operation, short reaction time, and high yield and chemoselectivity and thereby provides an efficient protocol for the divergent synthesis of thiocyanated enaminones
An efficient method for the synthesis of enaminones is described. The aldol-type addition of ketones to aromatic nitriles proceeded smoothly in the presence of a simple copper catalyst system (CuI–2,2′-bipyridine–NaOtBu) in N,N-dimethylformamide. Enaminones in satisfactory to excellent yields were produced using this technique.