Process for the preparation of and crystalline forms of optical enantiomers of modafinil
US9382200B2 · kind B2 · utility
0Cited by
8References
18Claims
0Family size
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Key dates
| Filing date | Jul 22, 2009 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | Aug 12, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B2200/13
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to a polymorphic form of (−)-modafinil that produces a powder X-ray diffraction spectrum comprising intensity peaks corresponding to interplanar spacings of about 8.54, 4.56, and 3.78 Å, and a process for the preparation thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.