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■ Synthesis of 2-Arylquinoxalines: Triarylstibane-Catalyzed Oxidative Cyclization of α-Hydroxy Ketones with 1,2-Diamines under Aerobic Conditions

Mio Matsumura, Rie Takada, Yuu Ukai, Mizuki Yamada, Yuki Murata, Naoki Kakusawa, and Shuji Yasuike*

*Faculty of Pharmaceutical Sciences, Aichi Gakuin University, 1-100 Kusumoto-cho Chikusa-ku Nagoya city 464-8650, Japan

Abstract

The reaction of -hydroxy ketones with 1,2-diamines in the presence of triphenylstibane (10 mol%) as catalyst led to the formation of 2-arylquinoxalines in moderate to good yield under aerobic conditions. This reaction is the first example of oxidative cyclization catalyzed by organoantimony compounds.