Azobenzene → 2-(2-hydroxy-5-t-butylphenyl)benzotriazole-N-oxide

Participants

Reaction Conditions

Reaction Steps

9-fluorenone 2.5 g was added to a mixture of secondary butanol 80 g, water 14 g and 97% sodium hydroxide 22.4 g, and 2-nitro-2'-hydroxy-5'-t-butylazobenzene 19.9 g was added to the resultant mixture for one hour while stirring at 80° C. The mixture was further stirred at 90°~97° C. for 4 hours, thus almost all of the azobenzene having disappeared to produce 2-(2-hydroxy-5-t-butylphenyl)benzotriazole-N-oxide. Thus, the reaction of Process (b) was completed. The resultant reaction liquor was further stirred for 4 hours, thus the N-oxide having disappeared to finish the reaction of Process (c).

Provenance & Evidence