Process for the production of 16,17-[(cyclohexylmethylen)bis(oxy)]-11,21-dihydroxy-pregna-1,4-dien-3,20-dion or its 21-isobutyrat by transketalisation
US7468433B2 · kind B2 · utility
2Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 6, 2001 |
| Grant date | Dec 23, 2008 |
| Priority date | — |
| Expiry date | Feb 17, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07J71/0031
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of 16,17-[(cyclohexylmethylene)bis(oxy)]-11,21-dihydroxypregna-1,4-diene-3,20-dione[11β,16α(R)] and similar compounds, by reaction of an appropriate 16,17-ketal with cyclohexanealdehyde.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.