申请人:MONSANTO COMPANY
公开号:EP0001910A1
公开(公告)日:1979-05-16
Dehydrohalogenation-rearrangement of 1,1-bis (4-oxy-substituted aryl)-2- haloethanes to yield 4,4'-dioxy- substituted stiibenes is effected by heating an acidic reaction medium comprising the 1,1-bis (4-oxy- substituted aryl)-2- haloethana dissolved in a solution of an aliphatic carboxylic acid and a carboxylic acid salt The process is particularly directed to the preparation of 4,4'-dihydroxystilbene from 1,1-bis (4-hydroxyphenyl)- 2-chloroethane. The 4,4'-dihydroxystilbene may further be acylated to the diacyloxy derivative.
1,1-双(4-氧代芳基)-2-卤代乙烷的脱氢卤化重排生成 4,4'-二氧代链烷烃的方法是加热酸性反应介质,该介质包括溶解在脂肪族羧酸和羧酸盐溶液中的 1、该工艺特别适用于从 1,1-双(4-羟基苯基)-2-氯乙烷制备 4,4'-二羟基二苯乙烯。4,4'-二羟基二苯乙烯可进一步酰化为二乙酰氧基衍生物。