Polyhydrophenanthrene derivatives
US3992437A · kind A · utility
2Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1975 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | Apr 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/26
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Alkyl polyhydro-2-phenanthrylideneacetates are prepared by interacting the corresponding 2-oxopolyhydrophenanthrenes with a tri-lower-alkyl .alpha.-phosphono-lower-alkanoate. Said alkyl polyhydro-2-phenanthrylideneacetates are hydrolyzed to the free acid, and then reesterified via the acid chloride with a tertiaryamino-lower-alkanol to give basic esters having cardiotonic activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.