A ReCl(CO)5/MeC(CH2PPh2)3 (L2) system was developed for the C-methylation reactions utilizing methanol and base, following the borrowing hydrogen strategy. Diverse ketones, indoles, and arylacetonitriles underwent mono- and dimethylation selectively up to 99% yield. Remarkably, tandem multiple methylations were also achieved by employing this catalytic system.
按照借用氢的策略,开发了一种ReCl(CO)5 / MeC(CH 2 PPh 2)3(
L2)系统,用于利用
甲醇和碱进行C-甲基化反应。对各种酮,
吲哚和芳基
乙腈进行选择性的单-和二甲基化反应,收率高达99%。值得注意的是,通过采用该催化体系,也能实现串联多个甲基化。