An efficient and highly selective deprotecting method for beta-(trimethylsilyl)ethoxymethyl ethers

J Org Chem. 2002 Feb 22;67(4):1384-7. doi: 10.1021/jo0107204.

Abstract

A series of beta-(trimethylsilyl)ethoxymethyl ethers were hydrolyzed to their corresponding alcohols in high yields by using a catalytic amount of CBr4 (15%) in MeOH under refluxing reaction conditions. The chemoselective deprotection between trialkylsilyl and beta-(trimethylsilyl)ethoxymethyl-protected alcohols can be achieved by using an alcohol with steric hindrance such as iPrOH. The selectivity also can be achieved in the CBr4/MeOH reaction mixture under ultrasonic reaction conditions.