Method for synthesis of aryl difluoromethyl ethers
US5731477A · kind A · utility
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16Claims
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Assignee
Inventors
Key dates
| Filing date | Jan 31, 1995 |
| Grant date | Mar 24, 1998 |
| Priority date | — |
| Expiry date | Jan 31, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D209/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a method for preparing difluoromethyl ethers, thiols and amines without using chlorofluorocarbon gases. The intermediates prepared by this method can be used to make certain compounds which act as PDE IV inhibitors which are useful for treating asthma and other diseases implicated with the PDE IV isozyme.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.