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ChemInform Abstract: Reductive Cyclization of o-Nitrophenylazobenzenes to 2-Aryl-2H-benzotriazoles by SmI2.

✍ Scribed by B. H. KIM; S. K. KIM; Y. S. LEE; Y. M. JUN; W. BAIK; B. M. LEE

Publisher: John Wiley and Sons
Year: 2010
Weight: 31 KB
Volume: 29
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199807153

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## Abstract Zinc powder‐mediated reductive cyclization of __o__‐nitrophenylazophenols in alkaline solution affords the corresponding 2‐aryl‐2__H__‐benzotriazoles in high yields under mild reaction conditions. __No organic solvents__ are used in the reaction and only minimal amounts in the work‐up.