Metalated Nitriles: Organolithium, -magnesium, and -copper Exchange of α-Halonitriles
作者:Fraser F. Fleming、Zhiyu Zhang、Wang Liu、Paul Knochel
DOI:10.1021/jo047877r
日期:2005.3.1
dimethylcuprate reagents generating reactive, metalated nitriles. The rapid halogen−metal exchange with alkyllithium and Grignard reagents allows selective exchange in the presence of reactive carbonyl electrophiles, including aldehydes, providing a high-yielding alkylation protocol. Lithiated and magnesiated nitriles react with propargyl bromide by SN2 displacement whereas organocopper nitriles react
α-卤代腈与烷基锂,有机镁和二甲基cup酸锂试剂反应生成活性的金属化腈。与烷基锂和格氏试剂的快速卤素金属交换可在存在醛的反应性羰基亲电试剂存在下进行选择性交换,从而提供了高产率的烷基化方案。锂化和氧化镁腈通过S N 2置换与炔丙基溴反应,而有机铜腈通过S N 2'置换反应,与C-金属化腈的形成相关。