Preparation of 3,4-difluorobenzotrifluoride

Details Preparation of 3,4-difluorobenzotrifluoride Preparation of 3,4-difluorobenzotrifluoride

1988-11-28

1990-06-26

Evans, J. E.

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

Organic compounds

Halogen containing

570127, C07C 1720, C07C 2124

Patent

active

049373960

ABSTRACT:
3,4-Difluorobenzotrifluoride is prepared by contacting a 3,4-dihalobenzotrifluoride with an effective amount of KF or CsF in a polar aprotic solvent at an elevated temperature under substantially anhydrous conditions. The product can be removed as it is formed or the reaction may be run at the autogenous pressures generated by the reaction mixture in a sealed reactor.

REFERENCES:
patent: 3408412 (1968-10-01), Blackley et al.
patent: 3453337 (1969-07-01), Bennett et al.
patent: 4388472 (1983-06-01), Cartwright et al.
patent: 4590315 (1986-05-01), Maul et al.
patent: 4684734 (1987-08-01), Kaieda et al.
Yakobson et al., "Recent Synthetic Methods for Polyfluoroaromatic Compound" Synthesis, pp. 652-656 10-1976.

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