Silica-Supported Perchloric Acid (HClO₄-SiO₂): A Versatile Catalyst for Tetrahydropyranylation, Oxathioacetalization and Thioacetalization

Abstract

A simple and convenient synthetic protocol for the protection of hydroxyl group as tetrahydropyranyl ether as well as carbonyl functionality as oxathioacetal and thioacetal has been achieved using a catalytic amount of silica-supported perchloric acid under solvent-free conditions. This protocol has many advantages compared to currently available methodologies in terms of simplicity, yield, reaction time, reusability of the catalyst and economic viability.

alcohols - phenols - THP ethers - carbonyl compounds - oxathioacetals - thioacetals

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