Process for the preparation of 2,2-difluoro-1,3-benzodioxole
US5432290A · kind A · utility
1Cited by
4References
17Claims
0Family size
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Key dates
| Filing date | Jan 21, 1992 |
| Grant date | Jul 11, 1995 |
| Priority date | — |
| Expiry date | Jan 21, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D317/46
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.