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Note | Regular issue | Vol 78, No. 10, 2009, pp.2579-2588
Published online, 19th June, 2009
DOI: 10.3987/COM-09-11759
One-Pot Synthesis of Benzotriazoles and Benzotriazole 1-Oxides by Reductive Cyclization of o-Nitrophenylazo Compounds with Benzyl Alcohol

Renata Farkas, Mercedes Törincsi, Pal Kolonits, Oscar Jimenez Alonso, and Lajos Novak*

*Institute for Organic Chemistry, Technical University Budapest, H-1521 Budapest, P.O. Box 91Gellért tér 4, Hungary


Reductive cyclization of 2-[(2-nitrophenyl)azophenols 1 with benzyl alcohol and sodium hydroxide afforded 2-(2H-benzotriazol- 2-yl)phenols 3 and their 1-oxide 2 in good to excellent yields.