A convenient preparation of p-methoxybenzyl esters

摘要

Carboxylic acids are conveniently and efficiently protecteda s their p-methoxybenzyl esters under very mild conditions using the pre-formed reagent N,N'-diisopropylO-(4-methoxybenzyl)isourea,and this method allows selective protection of carboxylic acids in the resence of other functionalties such as enolisable ketones and alcohol group.