Solvent-Free NaHSO<sub>4</sub>-SiO<sub>2</sub>-Catalyzed Efficient Tetrahydropyranylation of Alcohols and Phenols
作者:Henok H. Kinfe、Fanuel M. Mebrahtu、Paseka T. Moshapo
DOI:10.1080/00397911.2011.629068
日期:2013.5.3
Abstract A simple and efficienttetrahydropyranylation of alcohols and phenols has been developed using NaHSO4-SiO2 (0.5 mol%) as a catalyst under solvent-free conditions to yield corresponding tetrahydropyranyl ethers in excellent yields. GRAPHICAL ABSTRACT
Chemoselective trimethylsilylation and tetrahydropyranylation of benzylic and primary and secondary aliphatic alcohols proceed efficiently in the presence of 1,3-dibromo-5,5-dimethylhydantoin (DBH) under mild and completely heterogeneous reaction conditions in excellent yields.