Process for the preparation of quinone derivative
US5677471A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Jul 26, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C49/753
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed herein are a quinone derivative represented by the following formula: ##STR1## wherein R.sup.1 and R.sup.2 are identical with or different from each other and mean individually a lower alkyl or lower alkoxy group, or may form an aromatic ring together, R.sup.3 denotes a lower alkyl group, n stands for 0 or an integer of 1-9, and a linkage--is a single or double bond, such as a vitamin K derivative or coenzyme Q derivative; and a process for the preparation of the quinone derivative at a high yield without forming any geometric isomer; as well as a 1,4,4.sub.a,8.sub.a -tetrahydro-4.sub.a .alpha.-alkenyl-1.alpha.,4.alpha.-methanonaphthalene-5,8-dione derivative which is useful as an intermediate for the preparation of the quinone derivative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.