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Acylation of alcohols and activated aromatic compounds on silica embedded-triflate catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
43962 45997 2006 5 PDF Available
Title
Acylation of alcohols and activated aromatic compounds on silica embedded-triflate catalysts
Abstract

A series of triflate derivatives (La(OTf)3, tert-butyl-dimethyl-silyltrifluoromethane-sulfonate (BDMST) and triflic acid (HOTf)) embedded in a silica matrix were used as heterogeneous catalysts for the acylation of alcohols and activated aromatic compounds. Acylation of saturated alcohols and cyclohexanol resulted in O-acylated products. The acylation of the aromatic compounds was dependent on temperature and substituents. At low temperatures, for phenols and naphtols, acylation occurred mainly to O-acylated. Under these conditions, the presence of catalysts only enhanced the reaction rate. The increase of the temperature above 150 °C also led to C-acylation. For anisole and 1-methoxynaphtalene, acylation occurred at the aromatic ring even at low temperatures.

Keywords
La(OTf)3; tert-butyl-dimethyl-silyltrifluoromethane-sulfonate; Triflic acid; Acylation of alcohols; Phenols; Naphtols; Anisol; 1-Methoxynaphtalene
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Acylation of alcohols and activated aromatic compounds on silica embedded-triflate catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 301, Issue 1, 10 February 2006, Pages 133–137
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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