Cesium Carbonate Catalyzed Esterification of <i>N</i>-Benzyl-<i>N</i>-Boc-amides under Ambient Conditions
作者:Danfeng Ye、Zhiyuan Liu、Hao Chen、Jonathan L. Sessler、Chuanhu Lei
DOI:10.1021/acs.orglett.9b02513
日期:2019.9.6
We report a general activated amide to ester transformation catalyzed by Cs2CO3. Using this approach, esterification proceeds under relatively mild conditions and without the need for a transition metal catalyst. This method exhibits broad substrate scope and represents a practical alternative to existing esterification strategies. The synthetic utility of this protocol is demonstrated via the facile synthesis of crown ether derivatives and the late-stage modification of a representative natural product and several sugars in reasonable yields.