Substituted benzaldehyde, benzaldehyde and propanal tert-butyl(methyl)hydrazones were successfully acylated with trichloroacetyl chloride to afford 3-unsubstituted and 3-aryl-3-tert-butyl(methyl)hydrazono-1,1,1-trichloro-2-alkanones 2. Several 3-alkyl- or 3-aryl-1-tert-butyl-5-chloro-4-pyridazinones 4 were synthesized in good yields by thermally induced cyclization of 2 in refluxing toluene.
取代的
苯甲醛、
苯甲醛和
丙醛叔丁基(甲基)酰
肼成功地与
三氯乙酰氯酰化,得到了 3-未取代的和 3-芳基-3-叔丁基(甲基)酰
肼-1,1,1-三
氯-2-烷酮 2。通过 2 在回流
甲苯中的热诱导环化反应,合成了几种 3-烷基或 3-芳基-1-叔丁基-5-
氯-4-
哒嗪酮 4,收率很高。