Liu Lianli
2011
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Journal
Journal of Molecular Catalysis
Abstract
Cobalt sulfate-acetic acid is found to catalyze the tetrahydropyranylation of alcohols and phenols efficiently at room temperature under solvent-free conditions.It is a synergistic catalytic system,and both cobalt sulphate and acetic acid are indispensable for the rate acceleration of the reaction.Compared with other conventional catalysts,cobalt sulphate-acetic acid proved to be the best.After reaction,cobalt sulphate can be easily recovered by simple phase-separation and reused for many times without deterioration in catalytic activity.A probable reaction mechanism is proposed.