申请人:Hoechst Celanese Corporation
公开号:US05072025A1
公开(公告)日:1991-12-10
3-substituted-4-hydroxy- and 4-acetoxystyrene compounds, especially 3,5-di(methyl, bromo or chloro)-4-acetoxystyrene as well as a process for its preparation. 2,6-dimethylphenol is acylated with acetic anhydride and HF catalyzed to produce 3,5-dimethyl-4-hydroxy-acetophenone. After subsequent esterification with acetic anhydride and catalyzed hydrogenation to form 1-(3',5'-dimethyl-4'-acetoxyphenyl)ethanol, this intermediate is then dehydrated with an acid and a polymerization inhibitor to produce 3,5-dimethyl-4-acetoxystyrene.
3-取代-4-羟基和4-乙酰氧基苯乙烯化合物,特别是3,5-二(甲基、溴或氯)-4-乙酰氧基苯乙烯,以及其制备方法。2,6-二甲基酚与乙酸酐和HF催化剂酰化,产生3,5-二甲基-4-羟基-乙酰苯。随后,通过乙酸酐酯化和催化氢化形成1-(3',5'-二甲基-4'-乙酰氧基苯基)乙醇,然后用酸和聚合抑制剂脱水,产生3,5-二甲基-4-乙酰氧基苯乙烯。