Process for preparation of a polymorphic form of terphenadine having a high melting point and enhanced purity, and the product thus obtained
US5380856A · kind A · utility
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7Claims
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Key dates
| Filing date | Sep 13, 1993 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Sep 13, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/22
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention concerns a process for preparation of a polymorphic form of terphenadine having a high melting point and enhanced purity, according to which water and a raw terphenadine solution are mixed in dimethylformamide and the pure terphenadine thus precipitated is collected. The invention also concerns the product obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.