title: Zirconium(IV) chloride catalyzed new and efficient protocol for the selective cleavage of p-methoxybenzyl ethers.
abstract: A highly selective and efficient method for the unmasking of p-methoxybenzyl (PMB) ethers and esters has been developed by use of 20 mol % of zirconium(IV) chloride as Lewis acid in acetonitrile. The present method is very fast, and the conditions are tolerable to a variety of acid/base-sensitive protecting groups and substrates such as carbohydrates, terpenes, and amino acids. The products are obtained in good to high yields.
authors.affiliation: D-211, Discovery Laboratory, Organic Chemistry Division III, Indian Institute of Chemical Technology, Hyderabad 500 007, India. esmvee@iict.ap.nic.in
authors.forename: Gangavaram V Madhava
authors.initials: GV
authors.lastname: Sharma
authors.forename: Ch Govardhan
authors.initials: ChG
authors.lastname: Reddy
authors.forename: Palakodety Radha
authors.initials: PR
authors.lastname: Krishna