Visible Light-Mediated Coupling of Thioureas and 1,3-Dicarbonyls: Towards a Leaving Group-Free Synthesis of Aminothiazoles
作者:Irwan Iskandar Roslan、Kian-Hong Ng、Mohammed Ashraf Gondal、Chanbasha Basheer、Mohamed A. Dastageer、Stephan Jaenicke、Gaik-Khuan Chuah
DOI:10.1002/adsc.201701565
日期:2018.4.17
A synthesis of aminothiazoles from various 1,3‐dicarbonyls and thioureas without a leavinggroup has been developed. The reaction is photocatalyzed by tetraiodofluorescein, an organic dye. Under irradiation with green LEDs, a sulfur radical is generated in situ from thiourea, followed by addition to the enol tautomer, forming the aminothiazole backbone. This novel strategy provides a greener alternative