RICE HUSK ASH: A NEW, CHEAP, EFFICIENT, AND REUSABLE REAGENT FOR THE PROTECTION OF ALCOHOLS, PHENOLS, AMINES, AND THIOLS

A mild, efficient, and eco-friendly protocol for the protection of alcohols and phenols as trimethylsilyl ethers has been developed using rice husk ash as a reagent. This reagent is also able to catalyze the acetylation of alcohols, phenols, thiols, and amines with acetic anhydride. All reactions were performed under mild conditions in good to high yields.