Method for producing bis (trifluoromethyl) benzene

Details Method for producing bis (trifluoromethyl) benzene Method for producing bis (trifluoromethyl) benzene

1999-04-27

2000-07-25

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

20415797, C07C 2200, C07C 1700

Patent

active

060938587

ABSTRACT:
The invention relates to a method for producing a bis(trifluoromethyl)benzene. This method includes the steps of (a) chlorinating a compound represented by the general formula (1) by chlorine, thereby to produce a trichloromethyltrifluoromethylbenzene; and (b) fluorinating the tricbloromethyltrifluoromethylbenzene by hydrogen fluoride, thereby to produce the bis(trifluoromethyl)benzene, ##STR1## where m is 1, 2 or 3. It is not necessary in the invention to handle solid in any reaction step. Therefore, the invention is very useful in the production of a bis(trifluoromethyl)benzene in an industrial scale

REFERENCES:
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patent: 2859245 (1958-11-01), Smith
patent: 4079089 (1978-03-01), Klauke
patent: 4462937 (1984-07-01), Ramanadin et al.
patent: 4966988 (1990-10-01), Schinski et al.
Marsh, F.D., Farnham, W.B., Sam, D.J., and Smart, B.E. (1982) "Dichlorine Monoxide: A Powerful and Selective Chlorinating Reagent". J. Am. Chem. Soc. 104:4680-4682.
Anonymous (1985) "Preparation of Methyl Substituted Trifluoromethylbenzenes". Research Disclosure 255:368.
Murray, R.L., Beanblossom, W.S., and Wojcik, B.H., (1947) "Production of Bis (Trifluoromethyl) Benzene". Industrial and Engineering Chemistry 39:302-305.
McBee, Earl T., Frederick, Marvin R., (1949) "Chlorination of bis- and Chloro-bis-(perfluoroalkyl)-benzenes" J. Am. Chem. Soc. 71:1490-1491.

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