Chen MY, Lee ASY. An efficient and highly selective deprotecting method for beta-(trimethylsilyl)ethoxymethyl ethers.
J Org Chem 2002;
67:1384-7. [PMID:
11846692 DOI:
10.1021/jo0107204]
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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.
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