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我们曾报道在合适的条件下三烷基炔基硼酸锂可以与CO_2反应,当亲电试剂CO_2进攻三烷基炔基硼酸锂中炔基上的β-碳原子时,硼原子上的一个烷基即向炔基的α-碳上转移.而且转移烷基在反应前后其构型保持不变.反应式为
We have reported that lithium trialkyl alkynyl borate can react with CO 2 under suitable conditions and when the electrophile CO 2 attacks the β-carbon atom of the alkynyl group in the lithium trialkyl lithium alkylate, one alkane on the boron atom The base is transferred to the α-carbon of the alkynyl group, and the alkyl group remains unchanged before and after the reaction. The reaction formula is