Non-aromatic oxygenated strong acid dehydration of 9.alpha.-hydroxyandrostenediones
USRE33364E · kind E · reissue
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23Claims
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Inventors
Key dates
| Filing date | Apr 14, 1988 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Apr 14, 2008 |
Classification
- Technology area (CPC —)General
Abstract
The present invention discloses a process for the production of androsta-4,9(11)-diene-3,17-dione type compounds from 9.alpha.-hydroxyandrostenedione type compounds by non-aromatic oxygenated strong acid dehydration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.