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Efficient method for tetrahydropyranylation/depyranylation of phenols and alcohols using a solid acid catalyst with Wells–Dawson structure

✍ Scribed by Gustavo P. Romanelli; Graciela Baronetti; Horacio J. Thomas; Juan C. Autino

Book ID: 104252073
Publisher: Elsevier Science
Year: 2002
Tongue: French
Weight: 109 KB
Volume: 43
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(02)01822-1

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✦ Synopsis

A simple and efficient procedure to form 2-tetrahydropyranyl acetals of phenols and alcohols is reported. Wells-Dawson heteropolyacid catalyst is used both in bulk form or supported on silica, reaction conditions include room temperature and toluene as solvent. Fast deprotection of THP-acetals can be attained by mere change of the solvent using THF-1% MeOH. In both reactions the supported catalyst is easily recoverable and reusable, and the yields are good to excellent.

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