The reduction of some o-Nitrophenylazo dyes with thiourea S, S-Dioxide (Formamidinesulfinic acid): a general synthesis of 2-Aryl-2H-benzotriazoles and their 1- …
J Rosevear, JFK Wilshire
Index: Rosevear, Judi; Wilshire, John F. K. Australian Journal of Chemistry, 1984 , vol. 37, # 12 p. 2489 - 2497
Full Text: HTML
Citation Number: 15
Abstract
Abstract Thiourea S, S-dioxide (formamidinesulfinic acid) reacts with o-nitrophenylazo dyes in ethanolic alkali to give, depending on the reaction conditions, either the corresponding 2- aryl-2H-benzo-triazoles or their 1-oxides. The reagent is particularly effective for preparing in high yield 2-(2'H-benzotriazol-2'-yl) phenols, which are important ultraviolet absorbers. The corresponding reductions involving ammonium sulfide and sodium dithionite were also ...
Related Articles:
Construction of 2-(2′-Hydroxy-5′-methylphenyl) benzotriazole over Pd/γ-Al2O3 by a Continuous Process
[Kim, Byeong Hyo; Lee, Doo Byung; Kim, Dae Ho; Han, Rongbi; Jun, Young Moo; Baik, Woonphil Heterocycles, 2000 , vol. 53, # 4 p. 841 - 850]
[Baik, Woonphil; Park, Tae Hong; Kim, Byeong Hyo; Jun, Young Moo Journal of Organic Chemistry, 1995 , vol. 60, p. 5683 - 5685]
Construction of 2-(2′-Hydroxy-5′-methylphenyl) benzotriazole over Pd/γ-Al2O3 by a Continuous Process
[Rosevear, Judi; Wilshire, John F. K. Australian Journal of Chemistry, 1982 , vol. 35, # 10 p. 2089 - 2093]
Construction of 2-(2′-Hydroxy-5′-methylphenyl) benzotriazole over Pd/γ-Al2O3 by a Continuous Process
[Rosevear, Judi; Wilshire, John F. K. Australian Journal of Chemistry, 1982 , vol. 35, # 10 p. 2089 - 2093]