Method of making m-chlorobenzotrifluoride

Details Method of making m-chlorobenzotrifluoride Method of making m-chlorobenzotrifluoride

C - Chemistry, Metallurgy

07

C

C07C 25/13 (2006.01) C07C 17/12 (2006.01)

Patent

CA 2233799

Disclosed is a method of making m-chlorobenzotrifluoride. Benzotrifluoride is reacted with chlorine gas in the presence of about 0.1 to about 5 mole% (based on benzotrifluoride) of a metal chloride which can be FeCl3, SbCl3, or AlCl3 and about 0.025 to about 5.0 mole% (based on benzotrifluoride) of a catalyst having the formula (See Fig. I) where Z is halogen, alkyl from C1 to C6, alkoxy from C1 to C6, or fluoroalkyl from C1 to C6, n is 0 to 5, and the molar ratio of metal chloride to cocatalyst is about 0.5 to about 4.

L'invention porte sur une méthode permettant de préparer du m-chlorobenzotrifluorure. On fait réagir le benzotrifluorure avec du chlore en présence d'environ 0,1 à environ 5 % molaire (basé sur le benzotrifluorure) d'un chlorure métallique qui peut être le FeCl3, le SbCl3 ou le AlCl3, et d'environ 0,025 à environ 5,0 % molaire (basé sur le benzotrifluorure) d'un catalyseur possédant la formule indiquée à la figure I, dans laquelle Z est un halogène, un alkyle en C1 - C6, un alkoxy en C1 - C6 ou un fluoroalkyle enC1 - C6, n est compris entre 0 et 5 inclusivement, et le rapport molaire du chlorure métallique au cocatalyseur varie d'environ 0,5 à environ 4.

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