Spanish Sepiolite Clay as a New Heterogeneous Catalyst for the Tetrahydropyranylation of Alcohols and Phenols

Juan M. Campelo Department of Organic Chemistry, University of Cordoba, Avda. S. Alberto Magno, E-14004, Cordoba, Spain

Angel Garcia Department of Organic Chemistry, University of Cordoba, Avda. S. Alberto Magno, E-14004, Cordoba, Spain

Fernando Lafont Department of Organic Chemistry, University of Cordoba, Avda. S. Alberto Magno, E-14004, Cordoba, Spain

Diego Luna Department of Organic Chemistry, University of Cordoba, Avda. S. Alberto Magno, E-14004, Cordoba, Spain

Jose M. Marinas Department of Organic Chemistry, University of Cordoba, Avda. S. Alberto Magno, E-14004, Cordoba, Spain

Abstract

OH-protection of alcohols and phenols by heating the hydroxylated compound with 3,4-dihydro-2H-pyrane in the presence of a readily available and inexpensive spanish sepiolite heterogeneous acid clay catalyst is described. Isolated yields, not optimized, were in the range 29–99%.

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Spanish Sepiolite Clay as a New Heterogeneous Catalyst for the Tetrahydropyranylation of Alcohols and Phenols

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Spanish Sepiolite Clay as a New Heterogeneous Catalyst for the Tetrahydropyranylation of Alcohols and Phenols

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