Sulphated Zirconia in the Alkylation of ortho-Cresol by Camphene
S. A. POPOVA,В В I. YU. CHUKICHEVA and A. V. KUCHIN
Institute of Chemistry, Komi Science Centre, Ural Branch of the Russian Academy of Sciences, Ul. Pervomayskaya 48, Syktyvkar 167982 (Russia)
popsyz@yandex.ru
Keywords: sulphated zirconia, alkylation, ortho-cresol, camphene
Pages: 445–449
Abstract
An influence of the synthesis conditions upon the direction of o-cresol alkylation conditions with camphene in the presence of sulphated zirconia was investigated. There were O- and C-alkylation products obtained with a different structure of terpene substituent. It is demonstrated that the presence of sulphated zirconia results in the formation of 4-isobornylphenol, 4-isocamphylphenol and para-alkylated phenol with the methyl groups at positions 1, 4, 7 in the terpene moiety. The catalysis with sulphated zirconia allows obtaining para-alkylated 2-methylphenol with the isobornyl structure of terpene substituent, with a yield of 58 %.
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