Formylation Products of Thioamides; Part 16:1Synthesis of 2-(2-Amino-1-phenylethenyl)thiazoles by Amine-Exchange Reactions or by New Ring Transformations of Pyrimidin-4(1H)-thiones
Formylation Products of Thioamides; Part 16:<sup>1</sup>Synthesis of 2-(2-Amino-1-phenylethenyl)thiazoles by Amine-Exchange Reactions or by New Ring Transformations of Pyrimidin-4(1<i>H</i>)-thiones
作者:Alexander Knoll、Jürgen Liebscher
DOI:10.1055/s-1987-28137
日期:——
Substituted 2-(2-amino-1-phenylethenyl)- and 2-(2-hydroxy-1-phenylethenyl)thiazoles react with primary amines by amine-exchange and condensation, respectively, to give 2-(2-amino-1-phenylethenyl)thiazoles 5, bearing monosubstituted amino groups. The same compounds can be synthesized by a new ring transformation of pyrimidin-4(1H)-thiones, achieved by their reaction with methyl halides substituted with electron withdrawing groups in the presence of a base.