A highly efficient alkyl-selective addition to ketones with magnesium ate complexes derived from Grignard reagents and alkyllithiums is described. The nucleophilicity of R in R3MgLi is remarkably increased compared to that of the original RLi or RMgX, while the basicity of R3MgLi is decreased. Furthermore, a highly R-selective addition to ketones is demonstrated using RMe2MgLi in place of R3MgLi. [reaction:
描述了由衍生自
格氏试剂和烷基
锂的
镁盐络合物向酮高效烷基选择性加成的方法。与原始RLi或RMgX相比,R3MgLi中R的亲核性显着提高,而R3MgLi的碱性降低。此外,使用RMe2MgLi代替R3MgLi证明了对酮的高度R选择性加成。[反应:看文字]