Process for the preparation of 2H-chromenes
US7893262B2 · kind B2 · utility
0Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2004 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Mar 19, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/58
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention concerns a novel process for the preparation of 2H-chromenes of formula I and formula 5 and valuable intermediates of formulae 3 and 4 of this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.