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Effects of different reaction conditions on the synthesis of 2-hydroxy-4-n-octaoxybenzophenones (UV-531)

Reaction condition, UV-531, Amount of catalyst, Amount of water, Reaction time, 2, 4 - dihydroxy benzophenone (UV-214).

2, 4 - dihydroxybenzophenone (UV-214) reacted with 1 - bromododecane in KOH solution to produce 2-hydroxy-4-n-octaoxybenzophenones (UV-531). Effects of different reaction conditions such as the amount of catalyst, the amount of water and the reaction time on the synthesis of 2-hydroxy-4-noctaoxybenzophenones have been discussed. The optimum molar ratio of 2, 4 - dihydroxybenzophenone to KOH to 1 - bromododecane to dimethyl cetyl ammonium chloride to water and the reaction time were 0.06:0.07:0.06:0.002:0.25 and 6 hours, respectively.The experimental results showed that the yield of 2-hydroxy-4-n-octaoxybenzophenones by adding dimethyl cetyl ammoniumchloride into the reactionmixture reached 93.2%. It was found that dimethyl cetyl ammonium chloride was an ideal phase transfer agent.