Magnesium-promoted reductive carboxylation of ethyl benzoate in the presence of chlorotrimethylsilane in N,N-dimethylformamide brought about a new carbon-carbon bond formation between the carbonyl carbon atom and carbon dioxide to give the corresponding benzoylformic acid in good yield. It is noteworthy that only ethyl benzoates with substituents at the meta-position were converted into benzoylformic
在N,N-二甲基甲酰胺中,在
氯三甲基
硅烷的存在下,
镁促进的
苯甲酸乙酯的还原羧化反应在羰基碳原子和
二氧化碳之间形成了新的碳-碳键形成,从而以高收率得到了相应的苯甲酰基
甲酸。值得注意的是,只有在间位具有取代基的
苯甲酸乙酯被转化为苯甲酰基
甲酸衍
生物。此外,即使在还原条件下也未检测到
扁桃酸。该结果表明,在羧化的中间体
水解后获得苯甲酰基
甲酸,该中间体在反应介质中作为稳定的结构而活着。