A number of β-keto esters were synthesized by Pd-catalyzed carbonylation of halomethylketones in the presence of tributylamine in 68-86% yields. The reaction is completed in 2 hours at 110 °C and 10 bar CO pressure. Chloromethylketones are carbonylated selectively while 2-bromoacetophenone is partly reduced to acetophenone as a byproduct. The reaction can be carried out at atmospheric pressure though the rate stays low. The reaction mechanism is discussed.
通过Pd催化的卤甲酮碳酰化反应,在
三丁胺存在下,合成了多种β-
酮酯,产率介于68-86%之间。该反应在110°C、10巴CO压力下进行,仅需2小时即可完成。
氯甲酮碳酰化反应有选择性,而2-
溴乙酰苯部分被还原成
乙酰苯作为副产物。反应也可在常压下进行,尽管速率较低。反应机理进行了探讨。