Indium–Silver- and Zinc–Silver-Mediated Barbier–Grignard-Type Alkylation Reactions of Imines by Using Unactivated Alkyl Halides in Aqueous Media
作者:Zhi-Liang Shen、Hao-Lun Cheong、Teck-Peng Loh
DOI:10.1002/chem.200701468
日期:2008.2.18
efficient and practical method for the Barbier-Grignard-type alkylation reactions of simple imines by using a one-pot condensation of various aldehydes, amines (including the aliphatic and chiral version), and secondary alkyl iodides has been developed. The reaction proceeded more efficiently in water than in organic solvents. Without the use of CuI, it mainly gave the imine self-reductive coupling product
在In或Zn / AgI / InCl(3)存在的情况下,通过使用一锅缩合的各种醛,胺(包括脂肪族和手性化合物)的简单亚胺进行Barbier-Grignard型烷基化反应的高效实用方法版本),并且已经开发了仲烷基碘。该反应在水中比在有机溶剂中更有效地进行。不使用CuI,它主要得到亚胺自还原偶联产物,它不是烷基化产物。当使用L-缬氨酸甲酯作为底物时,获得了良好的非对映选择性(高达92:8 dr)。