electrophilic alkylations. N-Lithiated or C-magnesiated nitriles can be prepared from the same nitrile precursor and selectively reacted with a 1:1 mixture of methyl cyanoformate and benzyl bromide or bifunctional electrophiles through chemoselective attack onto either an alkyl halide or a carbonyl electrophile. A mechanistic explanation for the chemoselectivity preferences is provided that rests on the structural
金属腈在亲电烷基化中表现出互补的
化学选择性。可以从相同的腈前体制备N-
锂化或C-
镁化的腈,并通过
化学选择性攻击烷基卤化物或羰基亲电子试剂,使其与
氰基甲酸甲酯和苄基
溴或双官能亲电试剂的1:1混合物选择性反应。提供了对
化学选择性偏好的机械解释,该解释基于N-和C-
金属腈之间的结构和络合差异。