Polyamide from optically active, anti head-to-head coumarin dimer
US4975517A · kind A · utility
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2Claims
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Key dates
| Filing date | Mar 26, 1987 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Mar 26, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/26
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A racemic, anti head-to-head coumarin dimer can be separated into its optically active constituents by using an optically active amine. Each optically active isomer can be further reacted with a diamine to afford an optically active polyamide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.