One-pot four-component synthesis of polysubstituted thiazoles via cascade Ugi/Wittig cyclization starting from odorless Isocyano(triphenylphosphoranylidene)-acetates
作者:Zhi-Rong Guan、Zi-Ming Liu、Qin Wan、Ming-Wu Ding
DOI:10.1016/j.tet.2020.131101
日期:2020.4
A new one-potfour-component preparation of polysubstituted thiazoles by a cascade Ugi/Wittig cyclization has been developed. The four-component reactions of the odorless isocyano(triphenylphosphoranylidene)acetates 1, aldehydes 2, amines 3 and thiocarboxylic acids 4 produced 2,4,5-trisubstituted thiazoles 5 in moderate to good yields in the presence of triethylamine. The two-component reactions between