Reduction of hydroxy-functionalised carbaboranyl carboxylic acids by organolithium reagents yields the corresponding tertiary alcohols. This is in contrast to exo-polyhedral C–C bond cleavage of unsubstituted carbaboranyl carboxylic acids upon reaction with lithium organyls. The proposed dimeric contact ion pairs may also explain the formation of tertiary alcohols instead of the expected ketones.
有机锂试剂还原羟基官能化碳
硼烷基
羧酸可生成相应的叔醇。这与未取代的碳
硼酰基
羧酸与
有机锂反应时外多面体 C-C 键裂解形成鲜明对比。提出的二聚接触离子对也可以解释形成叔醇而不是预期的酮的原因。