Efficient tetrahydropyranylation of phenols and alcohols catalyzed by supported Mo and W Keggin heteropolyacids

GP Romanelli, PG Vázquez, LR Pizzio…

文献索引：Romanelli; Vazquez; Pizzio; Caceres; Blanco; Autino Synthetic Communications, 2003 , vol. 33, # 8 p. 1359 - 1365

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被引用次数: 18

摘要

Abstract The protection of phenols as tetrahydropyranyl acetals is studied using supported Keggin heteropolyacids as catalysts, specifically molybdophosphoric or tungstophosphoric acids supported on silica. Phenol tetrahydropyranyl acetals are obtained in short times at room temperature with excellent yields. Protection of alcohols is also performed under mild conditions using both supported heteropolyacids, with yields ranging between good and ...