1-Butanol → UV-328

Participants

Reaction Steps

2-(2-hydroxy-3,5-di-t-amylphenyl)benzotriazole-N-oxide 23.2 g was added to a mixture of n-butanol 60 g, water 12 g and 97% sodium hydroxide 16.5 g, and 9-fluorenone 2.0 g was further added to the resultant mixture. The resultant mixture was heated to 80° C., and was further stirred at 80°~85° C. for 2.5 hours, thus the reduction reaction being completed. The reaction liquor was treated in the same manner as in Example 17 to recover butanol, and 1.8 g of 9-fluorenone catalyst was recovered as a fraction at 120°~130° C. under vacuum of 2~3 mmHg. After recovering the catalyst, the remaining material was washed with methanol to produce the desired product, i.e. 20.5 g of 2-(2-hydroxy-3,5-di-t-amylphenyl)benzotriazole having a melting point of 79°~80° C. at the yield of 92.8%.

Provenance & Evidence