Preparation of 2-(2H-Benzotriazol-2-yl)phenols by the Reduction of 2-[(2-Nitrophenyl)azo]phenols with Thiourea S,S-Dioxide

Shigeo Tanimoto; Takayoshi Kamano

doi:10.1055/s-1986-31733

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Synthesis 1986; 1986(8): 647-649
DOI: 10.1055/s-1986-31733

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Preparation of 2-(2H-Benzotriazol-2-yl)phenols by the Reduction of 2-[(2-Nitrophenyl)azo]phenols with Thiourea S,S-Dioxide

Shigeo Tanimoto^* , Takayoshi Kamano

^*Institute for Chemical Research, Kyoto University, Uji, Kyoto 611,Japan

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Publikationsdatum:
22. August 2002 (online)

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The reduction of 2-[(2-nitrophenyl)azo]phenols 1 with thiourea S,S-dioxide and sodium hydroxide in a mixture of isopropyl alcohol and water at reflux provide, 2-(2H-benzotriazol-2-yl)phenols 3 in excellent yields.