Process for the preparation of 2,2-difluoro-1,3-benzodioxole

Details Process for the preparation of 2,2-difluoro-1,3-benzodioxole Process for the preparation of 2,2-difluoro-1,3-benzodioxole

1992-01-21

1995-07-11

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31746

Patent

active

054322901

ABSTRACT:
A process for the preparation of 2,2-difluoro-1,3-benzodioxole from 2,2-dichlorol,3-benzodioxole. 2,2-Difluoro-1,3-benzodioxole is prepared by reaction of 2,2-dichloro-1,3-benzodioxole with potassium fluoride in the presence of an effective quantity of a catalyst selected from potassium hydrogen fluoride, sodium hydrogen fluoride, cesium hydrogen fluoride, rubidium hydrogen fluoride, and quaternary ammonium hydrogen fluoride. 2,2-Difluoro-1,3-benzoxodiole is an intermediate compound which is used particularly for the preparation of products for agricultural chemistry and for the synthesis of pharmaceutical products.

REFERENCES:
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patent: 4438275 (1984-03-01), Lantzsch et al.
patent: 4600787 (1986-07-01), Marhold et al.
patent: 4692166 (1987-09-01), Junino et al.
Chem. Berichte vol. 96, 1382 (1963).

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