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Communication | Regular issue | Vol 22, No. 2, 1984, pp.261-264
Published online, 1st January, 1970
DOI: 10.3987/R-1984-02-0261
Syntheses of Licoricone and Its Isomer

Masao Tsukayama,* Kunihiro Fujimoto, Tokunaru Horie, Mitsuo Masumura, and Mitsuru Nakayama

*Department of Chemical Science and Technology, Faculty of Engineering, University of Tokushima, Minamijosanjima-cho, Tokushima 770-8506, Japan

Abstract

The condensation of 6’,7-dibenzoyloxy-2’,4’- dimethoxyisoflavone with 2-methyl-3-buten-2-ol, followed by the hydrolysis of the resultant 3’-(3-methyl-2-butenyl)isoflavone afforded licoricone. Its isomer, 5’-(3-methyl-2-butenyl)isoflavone, was also synthesized from 7-benzoyloxy or 6’,7-dibenzoyloxyisoflavone in a similar manner.