作者:Le Guo、Xiaochen Ma、Huaquan Fang、Xiangqing Jia、Zheng Huang
DOI:10.1002/anie.201410293
日期:2015.3.23
Catalytic α‐alkylation of esters with primary alcohols is a desirable process because it uses low‐toxicity agents and generates water as the by‐product. Reported herein is a NCP pincer/Ir catalyst which is highly efficient for α‐alkylation of a broad scope of unactivated esters under mild reaction conditions. For the first time, alcohols alkylate unactivated α‐substituted acyclic esters, lactones,
酯与伯醇的催化α-烷基化是一个理想的过程,因为它使用低毒性的试剂并产生水作为副产物。本文报道的是一种NCP夹钳/ Ir催化剂,在温和的反应条件下,该催化剂对各种未活化酯的α-烷基化反应非常有效。醇类首次将未活化的α-取代的无环酯,内酯甚至甲基和乙酸乙酯烷基化。该方法可用于具有不同结构和官能团的羧酸衍生物的合成,其中某些是不可能通过常规的用烷基卤化物进行烯醇化烷基化而获得的。