Treatment of 6-chloro-4-dialkylamino-5-nitropyrimidines (Ia–d) under acidic conditions resulted in ring cleavage and formation of 3-amino-3-dialkylamino-2-nitroacrylonitriles (IIIa–d). Similar treatment of 4-amino- or 4-alkylamino-6-chloro-5-nitropyrimidines also gave acrylonitriles (IIIe–i) but 4-amino- or 4-alkylamino-5-nitropyrimidin-6(1H)-ones (IIe–i) were formed at the same time.
在酸性条件下处理6-
氯-4-二烷基
氨基-5-
硝基嘧啶(Ia–d)会导致环断裂并形成3-
氨基-3-二烷基
氨基-2-硝基
丙烯腈(IIIa–d)。对4-
氨基-或4-烷基
氨基-6-
氯-5-
硝基嘧啶的类似处理也得到了
丙烯腈(IIIe–i),但4-
氨基或4-烷基
氨基-5-
硝基嘧啶-6(1 H)-一个(IIe) –i)是同时成立的。