Synthesis of peptide thiazolines from β-hydroxythioamides. An investigation of racemization in cyclodehydration protocols
作者:Peter Wipf、Paul C. Fritch
DOI:10.1016/s0040-4039(00)73509-x
日期:1994.7
The formation of thiazolines from beta-hydroxythioamides under TsCl/Et(3)N, SOCl2, and Mitsunobu conditions leads to extensive epimerization at the C(2) exo methine position. In contrast, thiazolines of >94%, diastereomeric purity are isolated when the Burgess cyclodehydration protocol is applied.