Process for preparing compounds containing a difluoromethylene g

Details Process for preparing compounds containing a difluoromethylene g Process for preparing compounds containing a difluoromethylene g

1985-12-17

1987-09-22

Reamer, James H.

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

Organic compounds

Oxygen containing

560138, 560141, 560142, 560144, 560145, 560227, 564442, 568 54, 568433, 568588, 568639, 568642, 568649, 568655, 568683, C07C 4302, C07C 4318, C07C 6963, C07C 6962

Patent

active

046956573

ABSTRACT:
A process for the preparation of compounds containing a difluoromethylene group in a position .alpha. to an oxygen atom. An alcohol or a phenol is brought into contact with trifluoroacetic acid or a halide or anhydride thereof in anhydrous liquid hydrofluoric acid, in the presence of boron trifluoride, in a quantity such that the absolute pressure of boron trifluoride is at least about one bar. The compounds obtained according to the invention are used as synthesis intermediates in the pharmaceutical, plant-protection, and dye industries, as anesthetics and as additives for lubricating oils.

REFERENCES:
patent: 2567569 (1951-09-01), McBee et al.
patent: 4093665 (1978-06-01), Belous et al.
Prober, Jour. Amer. Chem. Soc. 75 (1953), 968-973.

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