Vitamin D3 derivative and production process thereof
US6177586A · kind A · utility
6Cited by
0References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1999 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Jun 8, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/1804
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The starting materials for a production process of a vitamin D.sub.3 derivative are disclosed, e.g., a cyclopentene derivative represented by the formula (1-2): ##STR1## wherein R.sub.1.sup.1 is a hydrogen atom, tri(C.sub.1 to C.sub.7 hydrocarbon) silyl group, C.sub.2 to C.sub.7 acyl group, group forming an acetal bond together with an oxygen atom of a hydroxyl group, and X.sub.1 is a bromine or iodine atom; and a heptanoic acid derivative represented by the formula (2-4): ##STR2## wherein X.sub.2 is a bromine atom or iodine atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.