A full conversion of benzyl chloride or substituted benzyl chloride is almost achieved in reaction with n-butyl magnesium chloride, above 94%, but the cross-coupling product yield is affected severely by the formation of homo-coupling counterpart. 苄基氯代物与正丁基氯化镁反应,转化基本完全,转化率大于94%,但自偶联产物的生成严重影响了交叉偶联产物的收率;