A new and efficient method for the synthesis of 2,3-dihydroimidazo[2,1-b]thiazoles 3, 2,3-dihydro-5H-thiazolo[3,2-a]pyrimidin-5-ones 4 and 2,3-dihydro-5H-thiazolo[3,2-a]pyrimidines 5 has been developed. The reactions of N′-(4,5-dihydrothiazol-2-yl)-N,N-dimethylamidines 1 with α-halogenoketones, acid chlorides or acrylic dienophiles were performed, leading to the title products.
开发了一种合成2,3-二氢
咪唑并[2,1-b]
噻唑3、2,3-二氢-5H-
噻唑并[3,2-a]
嘧啶-5-酮4和2,3-二氢-5H-
噻唑并[3,2-a]
嘧啶5的新颖高效方法。通过N′-(4,5-二氢
噻唑-2-基)-N,N-二甲基脒1与α-卤代酮、酸酐或
丙烯酸二烯亲和体的反应,得到了目标产物。