Ring-opening reactions of a number of halogen-substituted 3-phenylcyclobutenones in acetic acid and in aqueous sodium hydroxide have been investigate and the resulting carboxylic acids identified. The course of reaction in acetic acid can be rationalized by a mechanism involving vinylketene intermediates. The base-induced ring-opening reaction appears to follow a course dependent on the number and
已经研究了许多卤素取代的 3-苯基
环丁烯酮在
乙酸和
氢氧化钠水溶液中的开环反应,并确定了生成的
羧酸。
乙酸中的反应过程可以通过涉及
乙烯基乙烯酮中间体的机制来合理化。碱诱导的开环反应似乎遵循一个取决于卤原子数量和位置的过程,但通常与卤仿反应相似。