Gold-catalyzed transesterification of ortho-alkynylbenzoic acid esters: a novel protecting group for alcohols and phenols
作者:Kazuteru Umetsu、Naoki Asao
DOI:10.1016/j.tetlet.2008.09.146
日期:2008.12
Treatment of ortho-alkynylbenzoic acid esters with excess amounts of EtOH in the presence of a gold catalyst results in the liberation of alcohols or phenols in high yields under mild conditions. The protection of alcohols and phenols proceeds smoothly by use of ortho-alkynylbenzoic acid or ortho-iodobenzoyl chloride. Highly chemoselective deprotections are described.
在金催化剂存在下用过量的EtOH处理邻炔基苯甲酸酯会导致在温和条件下以高收率释放出醇或酚。通过使用邻炔基苯甲酸或邻碘苯甲酰氯,醇和酚的保护可顺利进行。描述了高度化学选择性的脱保护。