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Catalytic Alkylation of 2-Naphthol With C1-C3 Alcohols

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The vapour phase alkylation of 2-naphthol with C1-C3 alcohols in the presence of an iron catalyst that contains Cr-, Si- and K- oxides was investigated. 2-Naphthol was methylated in a temperature range 520-645 K giving first 1-methyl-2-naphthol and then 1,3-dimethyl-2-naphthol with total selectivity of ortho-alkylation over 98%. In the cases of ethanol and n-propanol, derivatives of 2-naphthol alkylated in the 1-position were obtained with high yield and selectivity. The reactions were carried out in a continuous process at atmospheric pressure.

Affiliations: 1: Department of Catalysis, W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-590 Wroclaw 2, P.O. Box 93 7, Poland; 2: Institute of Organic Chemistry, Biochemistry and Biotechnology, Technical University of Wroclaw, Poland


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