Polymorphic B form of 3-(cyclopropylmethoxy)-4-[4-(methylsulfonyl)phenyl]-5,5-dimethyl-5H-furan-2-one
US6677373B2 · kind B2 · utility
2Cited by
1References
12Claims
0Family size
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Key dates
| Filing date | Apr 8, 2002 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Apr 8, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P43/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
This invention is related to a polymorphic B Form of 3-(cyclopropylmethoxy)-4-[4-(methylsulfonyl)phenyl]-5,5-dimethyl-5H-furan-2-one characterized by the following parameters:cristalline systemTrigonalspace groupR-3descriptionhexagonalunit-cell dimensionsa (å)18.183b (å)18.183c (å)26.950&agr; (°)90&bgr; (°)90&ggr; (°)120unit-cell volume (å3)7716.5number of molecules per unit-cell Z18Temperature of measurement (° K)293calculated specific gravity1.303weight absorption coefficient (cm−1)2.11.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.