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KMID : 0380319900460000031
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Journal of Korean Research Institute for Better Living
1990 Volume.46 No. 0 p.31 ~ p.37
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A Study of Efficient Syntheses and Reactions of UV Absorbing Compounds
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康順姬/Kang, Soonhee
朴種倫/南貞姬/Park, Jong-Yun/Nam, Jeong-Hee
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Abstract
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Derivatives of 2,4-dihydroxybenzophenone are widely used as UV light absorbers. Furthermore 4-hydroxybenzophenone derivatives have been reported as a new HNE inhibitor.
In this study, these derivatives were prepared effciently by using DMAP as catalytic amounts(5mol％) on O-alkylation of 2,4-dihydroxybenzophenone with methyl sulfate, ethyl iodide, and ethyl bromide in the presence of potassium carbonate in acetone at 60℃. The products obtained were 2-hydroxy-4-methoxy-benzophenone, and 2,4-dimethoxybenzophenone, 2-hydroxy-4-ethoxy-benzophenone, and 2,4-diethoxybenzophenone. When DMAP was used as a catalyst, the reaction time had been shorthened enormously by comparing with that of the reaction without DMAP.
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