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研究了光促进温和条件下,以甲酸甲酯为C1源,非贵金属钴盐、铜盐催化的溴代烷烃的羰基化反应。实验表明,在光促进下,钴盐、铜盐均可催化溴代烷烃与甲酸甲酯的羰基化反应,得到相应的羧酸甲酯。钴盐催化下,碱性添加物NaOAc对反应有很好的促进作用,直链溴代烷烃在反应中除了得到相应的正构酯外,还有少量异构酯生成;铜盐催化下,直链溴代烷烃在反应中主要生成相应的正构酯。机理研究表明,在光照下甲酸甲酯先分解为CO和CH3OH,再与溴代烷烃进行羰基化反应。
The carbonylation of brominated alkanes catalyzed by methyl formate as a source, non-noble metal cobalt salts and copper salts under light mild conditions was studied. Experiments show that, under light, both cobalt salts and copper salts can catalyze the carbonylation of brominated alkanes with methyl formate to give the corresponding methyl esters. Under the catalysis of cobalt salt, the basic additive NaOAc can promote the reaction. In addition to the corresponding normal ester, the straight-chain brominated alkane can be generated in the reaction. Chain brominated alkane in the reaction mainly to generate the corresponding normal ester. Mechanism studies show that methyl formate is first decomposed into CO and CH3OH under light irradiation and then carbonylated with brominated alkanes.