Method for preparing substituted 3,7-dihydroxy steroids
US9802976B2 · kind B2 · utility
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21References
17Claims
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Key dates
| Filing date | Oct 19, 2015 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Nov 11, 2035 |
Classification
- Technology area (CPC —)General
Abstract
The invention relates to processes for preparing 17-alkynyl-7-hydroxy-steroids, such as 17-Ethynyl-10R,13S-dimethyl 2,3,4,7,8R,9S,10,11,12,13,14S,15,16,17-hexadecahydro-1H-cyclopenta[a]phenanthrene-3R,7R,17S-triol (also referred to as 17α-ethynyl-androst-5-ene-3β,7β,17β-triol), that are essentially free of process impurities having binding activity at nuclear estrogen receptors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.