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    • 8. 发明授权
    • Fluorine-containing acetophenones optionally halogenated on the CH.sub.3
-group and their precurser fluorine-containing benzonitriles
    • 任选在CH3-基上卤化的含氟苯乙酮及其前体含氟苯腈
    • US5142092A
    • 1992-08-25
    • US739738
    • 1991-07-30
    • Ernst KyselaBernd BaasnerKlaus Schaller
    • Ernst KyselaBernd BaasnerKlaus Schaller
    • C07C45/00C07C45/63C07C49/80C07C49/807C07C49/84C07C255/50C07C255/54
    • C07C45/63C07C255/50C07C255/54C07C45/004C07C49/80C07C49/807C07C49/84
    • 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, orb) R.sub.1, R.sub.3 and R.sub.4 denote fluorine and R.sub.2 and R.sub.5 denote hydrogen, orc) 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, ord) 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, ore) R.sub.1, R.sub.4 and R.sub.5 denote hydrogen and R.sub.2 and R.sub.3 denote CF.sub.3, orf) 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, org) 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, orh) R.sub.1 denotes chlorine, R.sub.2, R.sub.4 and R.sub.5 denote hydrogen and R.sub.3 denotes CF.sub.3and 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.
    • 其中X表示氢,氯或溴,R 1至R 5基团的式(I)中任选卤代的含氟苯乙酮具有下列含义:a)R 1和R 4表示氟,R 2 或R 3表示CF 3,或b)R 1,R 3和R 4表示氟,R 2和R 5表示氢,或c)R 1,R 4和R 5表示氢,R 2表示氯,R 3表示CF 3,或d) R4和R5表示氢,R2表示氯,R3表示OCF3,或e)R1,R4和R5表示氢,R2和R3表示CF3,或f)R1表示氯,R2表示CF3和R3,R4和R5表示氢, 或g)R 1表示氯,R 2,R 3和R 4表示氢,R 5表示CF 3,或h)R 1表示氯,R 2,R 4和R 5表示氢,R 3表示CF 3,以及由相应的氟化苯腈或苄基 通过与能够引入甲基的有机镁化合物反应并随后h进行卤化反应 如果合适,然后进行氯解或溴化。