Process for the stereospecific preparation of 24(R),25- and 24(S),25-dihydroxycholecalciferol and novel intermediates used therefor
US4758382A · kind A · utility
9Cited by
3References
16Claims
0Family size
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Key dates
| Filing date | Dec 22, 1986 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Dec 22, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C401/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A novel process for the stereospecific preparation of a 24(R),25- and 24(S),25-dihydroxycholecalciferol. Also provided are novel intermediates used in the above process, being 22-p-toluenesulfonyl derivatives of 23,24,25,26,27-pentanorcholecalciferol and of 24(R)- and 24(S),25-dihydroxycholecalciferol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.