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Communication | Regular issue | Vol 43, No. 3, 1996, pp.509-512
Published online, 1st January, 1970
DOI: 10.3987/COM-95-7311
Azolium Salts as Effective Catalysts for Benzoin Condensation and Related Reactions

Akira Miyashita,* Yumiko Suzuki, Motoi Kobayashi, Naomi Kuriyama, and Takeo Higashino

*School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Shizuoka 422, Japan


A catalytic ability of several azolium salts for benzoin condensation, the benzoylation of 4-chloro-1-phenyl-1H-pyrazolo[3,4-d]pyrimidine, and oxidative aroylation was examined. We found that azolium salts having an imidazolium moiety, such as 1,4-dimethyl-1,2,4-triazolium iodide (3), and 2-methylpyrido[1,2-c]- (4), dipyrido[1,2-c:2’,1’-e]- (5), naphtho[1,2-c]- (10), and phenanthro[9,10-c]imidazolium iodide (11) can be used as effective catalysts for benzoin condensation and related reactions.