申请人:YOSHITOMI PHARMACEUTICAL INDUSTRIES, LTD.
公开号:EP0335674A2
公开(公告)日:1989-10-04
The invention provides a selective process for preparing a 2,4- or 3,6-di-substituted phenol compound which comprises reacting an olefin compound of the formula:
wherein R¹ is hydrogen, halogen, alkyl, halogen substituted-alkyl, aryl, halogen substituted-aryl or alkyl substituted-aryl; and R², R³ and R⁴ are the same or different and each is hydrogen, halogen, alkyl, halogen substituted-alkyl or aralkyl; with a phenol compound of the formula:
wherein R⁵ is hydrogen, hydroxy, halogen, alkyl, halogen substituted-alkyl, alkoxy or -C(R⁶)(R⁷)CH(R⁸)(R⁹) (wherein R⁶ is hydrogen, halogen, alkyl, halogen substituted-alkyl, aryl, halogen substituted-aryl or alkyl substituted-aryl; and R⁷, R⁸ and R⁹ are the same or different and each is hydrogen, halogen, alkyl, halogen substituted-alkyl or aralkyl), in the presence of a phosphorus compound and a carboxylic acid compound as catalysts.
本发明提供了一种制备 2,4- 或 3,6- 二取代酚化合物的选择性工艺,该工艺包括使式 如下的烯烃化合物发生反应:
其中R¹为氢、卤素、烷基、卤素取代的烷基、芳基、卤素取代的芳基或烷基取代的芳基;且R²、R³和R⁴相同或不同,且各自为氢、卤素、烷基、卤素取代的烷基或芳烷基;与式中的苯酚化合物反应:
其中 R⁵ 是氢、羟基、卤素、烷基、卤素取代的烷基、烷氧基或 -C(R⁶)(R⁷)CH(R⁸)(R⁹)(其中 R⁶ 是氢、卤素、烷基、卤素取代的烷基、芳基、卤素取代的芳基或烷基取代的芳基;以及 R⁷、R⁸ 和 R𠞙 相同或不同,且各自为氢、卤素、烷基、卤素取代的烷基或芳烷基),以磷化合物和羧酸化合物为催化剂。