申请人:Ciba Specialty Chemicals Holding Inc.
公开号:EP0831081A1
公开(公告)日:1998-03-25
A method of producing N,N-disubstituted aminophenols of the general formula
wherein R1 and R2 are the same or different and each represents a saturated or unsaturated aliphatic hydrocarbyl, cycloalkyl, aralkyl,
the phenyl ring of which may be further substituted, alkoxyalkyl, or a cycloalkylalkyl, except that R1 and R2 are not simultaneously methyl and R' represents hydrogen, halogen, nitro, cyano, alkyl or alkoxy, which comprises reacting an aminophenol of general formula
wherein R3 represents hydrogen or R1, and R' is as defined above, with an organic halide species of general formula R2X wherein R2 is as defined above and X is halogen under aqueous acidic conditions with the periodic addition of an acid trapping agent in such a way that continuous monitoring of pH is not required.
一种生产通式为 N,N-二取代氨基苯酚的方法
其中 R1 和 R2 相同或不同,各自代表饱和或不饱和脂肪族烃基、环烷基、芳烷基、
其中 R1 和 R2 不同时为甲基,R'代表氢、卤素、硝基、氰基、烷基或烷氧基。
其中 R3 代表氢或 R1,R'如上定义,与通式 R2X 的有机卤化物(其中 R2 如上定义,X 为卤素)在酸性水溶液条件下反应,并定期添加酸捕捉剂,从而无需持续监测 pH 值。