[3,2-g] Pyranoquinoline derivatives
US4138401A · kind A · utility
1Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1976 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Mar 29, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/213
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-Keto-6,7,8,9-tetrahydro-2H-pyrano(3,2-g)-quinoline and 2-keto-9-methyl-,8,9-tetrahydro-2H-pyrano(3,2-g)-quinoline, compounds useful as laser dyes, are prepared from 7-hydroxy-1,2,3,4-tetrahydroquinoline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.