申请人:Bayer Aktiengesellschaft
公开号:US05142092A1
公开(公告)日:1992-08-25
Fluorine-containing acetophenones, optionally halogenated on the CH.sub.3 group, of the formula ##STR1## in which X represents hydrogen, chlorine or bromine and the radicals R.sub.1 to R.sub.5 have the following meaning, a) R.sub.1 and R.sub.4 denote fluorine, R.sub.2 and R.sub.5 denote chlorine and R.sub.3 denotes CF.sub.3, or b) R.sub.1, R.sub.3 and R.sub.4 denote fluorine and R.sub.2 and R.sub.5 denote hydrogen, or c) R.sub.1, R.sub.4 and R.sub.5 denote hydrogen, R.sub.2 denotes chlorine and R.sub.3 denotes CF.sub.3, or d) R.sub.1, R.sub.4 and R.sub.5 denote hydrogen, R.sub.2 denotes chlorine and R.sub.3 denotes OCF.sub.3, or e) R.sub.1, R.sub.4 and R.sub.5 denote hydrogen and R.sub.2 and R.sub.3 denote CF.sub.3, or f) R.sub.1 denotes chlorine, R.sub.2 denotes CF.sub.3 and R.sub.3, R.sub.4 and R.sub.5 denote hydrogen, or g) R.sub.1 denotes chlorine, R.sub.2, R.sub.3 and R.sub.4 denote hydrogen and R.sub.5 denotes CF.sub.3, or h) R.sub.1 denotes chlorine, R.sub.2, R.sub.4 and R.sub.5 denote hydrogen and R.sub.3 denotes CF.sub.3 and a process for their preparation from the corresponding fluorinated benzonitriles or benzyl halides by reaction with an organomagnesium compound capable of introducing methyl groups and subsequent hydrolysis, if appropriate followed by a chlorination or bromination.
含氟苯乙酮,可选择在CH.sub.3基团上卤化,化学式如下:##STR1## 其中X代表氢、氯或溴,基团R.sub.1至R.sub.5的含义如下,a) R.sub.1和R.sub.4表示氟,R.sub.2和R.sub.5表示氯,R.sub.3表示CF.sub.3,或者b) R.sub.1、R.sub.3和R.sub.4表示氟,R.sub.2和R.sub.5表示氢,或者c) R.sub.1、R.sub.4和R.sub.5表示氢,R.sub.2表示氯,R.sub.3表示CF.sub.3,或者d) R.sub.1、R.sub.4和R.sub.5表示氢,R.sub.2表示氯,R.sub.3表示OCF.sub.3,或者e) R.sub.1、R.sub.4和R.sub.5表示氢,R.sub.2和R.sub.3表示CF.sub.3,或者f) R.sub.1表示氯,R.sub.2表示CF.sub.3,R.sub.3、R.sub.4和R.sub.5表示氢,或者g) R.sub.1表示氯,R.sub.2、R.sub.3和R.sub.4表示氢,R.sub.5表示CF.sub.3,或者h) R.sub.1表示氯,R.sub.2、R.sub.4和R.sub.5表示氢,R.sub.3表示CF.sub.3,以及从相应的氟代苯腈或苄卤化物通过与能引入甲基基团的有机镁化合物反应,并随后可能的水解、氯化或溴化制备这些化合物的方法。