Polyhydro-2-phenanthrylideneacetic acids and esters thereof
US3932482A · kind A · utility
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10Claims
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Key dates
| Filing date | Jan 5, 1971 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Jan 5, 1991 |
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 tertiary-amino-lower-alkanol to give basic esters having cardiotonic activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.