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.
取代的2-(2-
氨基-1-苯基
乙烯基)-和2-(2-羟基-1-苯基
乙烯基)
噻唑分别与
伯胺通过胺交换和缩合反应,得到2-(2-
氨基-1-苯基
乙烯基)
噻唑5,带有单取代的
氨基。相同的化合物可以通过
嘧啶-4(1H)-
硫酮的新环转化来合成,这是通过它们与被吸电子基团取代的卤代烷在碱存在下反应来实现的。