The reaction of 4-chloro-2, 6-dimethylpyrimidine 1-oxide (II) with ethyl cyanoacetate and malononitrile under basic conditions gave the expected condensation products, while the reaction of II with methylene ketones failed. On the other hand, 2, 6-dimethyl-4-phenylsulfonylpyrimidine (X) smoothyl reacted not only with the above active methyl compounds but also with methylene ketones such as acetone, acetophenone and cyclohexanone.
在碱性条件下,4-
氯-2,6-二
甲基嘧啶 1-氧化物(II)与
氰乙酸乙酯和
丙二腈反应得到了预期的缩合产物,而 II 与亚甲基酮的反应却失败了。另一方面,2, 6-二甲基-4-苯磺酰基
嘧啶(X)平滑基不仅与上述活性甲基化合物反应,还与
丙酮、
苯乙酮和
环己酮等亚甲基酮反应。