Acetaldehyde → 2-(2-hydroxy-5-methylphenyl)benztriazole N-oxide

Participants

Reaction Conditions

Reaction Steps

2-nitro-2'-hydroxy-5'-methylazobenzene 12.9 g was added to a mixture of methanol 60 ml, water 30 ml and 97% sodium hydroxide 12.4 g, and the resultant mixture was stirred while raising temperature to 65° C. 9-fluorenone 1.2 g and then 90% acetoaldehyde 3.2 g were added to the mixture for 1 hour. The resultant mixture was then heated to the boiling point (75° C.), and was stirred at the boiling point (75° C.) for 6 hours, thus almost all of the azobenzenes having disappeared to produce 2-(2-hydroxy-5-methylphenyl)benzotriazole-N-oxide.

Provenance & Evidence