Copper-Catalyzed Oxidative CO Coupling by Direct CH Bond Activation of Formamides: Synthesis of Enol Carbamates and 2-Carbonyl-Substituted Phenol Carbamates
作者:G. Sathish Kumar、C. Uma Maheswari、R. Arun Kumar、M. Lakshmi Kantam、K. Rajender Reddy
DOI:10.1002/anie.201105020
日期:2011.12.2
Formamide CH bond activation has been achieved under oxidative conditions, using a copper catalyst and tert‐butyl hydroperoxide (TBHP) as the external oxidant (see scheme). This oxidative coupling of a range of dialkyl formamides provides an easy, phosgene‐free route for the selective synthesis of Z‐enol carbamates and 2‐carbonyl‐substituted phenol carbamates in high yields.
使用铜催化剂和叔丁基氢过氧化物(TBHP)作为外部氧化剂,可以在氧化条件下实现甲酰胺CH键的活化(参见方案)。多种二烷基甲酰胺的这种氧化偶联为高产率地选择性合成Z-烯醇氨基甲酸酯和2-羰基取代的苯甲酸氨基甲酸酯提供了一种简单,无光气的途径。