Holzapfel-Meyers-Nicolaou Modification of the Hantzsch Thiazole Synthesis
作者:Mark Bagley、Eleanor Merritt
DOI:10.1055/s-2007-990851
日期:2007.11
Modified conditions for Hantzsch thiazolesynthesis provides valine- and threonine-derived thiazoles without significant loss of optical purity. This two- or three-step procedure proceeds by the cyclocondensation of the corresponding thioamide under basic conditions, according to modified methods of Meyers and Holz-apfel. The hydroxythiazoline intermediate is then dehydrated by treatment with trifluoroacetic