Sulphated Zirconia in the Alkylation of ortho-Cresol by Camphene
S. A. POPOVA, 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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