Method for producing 4,4-dimethyl-3&bgr;-hydroxypregna-8, 14-diene-21-carboxylic acid esters and intermediate products obtained by said method
US6653491B1 · kind B1 · utility
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7Claims
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Key dates
| Filing date | Sep 19, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Sep 19, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07J13/007
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a method for representing compounds of the general formula (1). The invention further relates to the hitherto unknown compounds of general formulas (5, 6 and 7) in the form of intermediate products and to the use of 4,4-dimethyl-3&bgr; hydroxypregna-8,14-diene-21-carboxylic acid esters of the general formula (1) for producing 4,4-dimethyl-5&agr;-cholesta-8,14,24-triene-3&bgr;-ol (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.