Author:
Yang Shang-Feng,Li Pei,Fang Zi-Lin,Liang Sen,Tian Hong-Yu,Sun Bao-Guo,Xu Kun,Zeng Cheng-Chu
Abstract
The electrochemical preparation of 2-aminothiazoles has been achieved by the reaction of active methylene ketones with thioureas assisted by ᴅʟ-alanine using NH4I as a redox mediator. The electrochemical protocol proceeds in an undivided cell equipped with graphite plate electrodes under constant current conditions. Various active methylene ketones, including β-keto ester, β-keto amide, β-keto nitrile, β-keto sulfone and 1,3-diketones, can be converted to the corresponding 2-aminothiazoles. Mechanistically, the in situ generated α-iodoketone was proposed to be the key active species.
Funder
National Natural Science Foundation of China