Method for preparing 3-keto-benzofurane derivatives
US8871956B2 · kind B2 · utility
13Cited by
0References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2011 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | May 29, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D307/80
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a method for preparing 3-keto-benzofurane derivatives of the general formula: Formula (I), where R is an alkyl or aryl group, R1 is hydrogen or an alkyl or aryl group, and R2 is a substituted alkyl or phenyl group. Said preparation method involves coupling a derivative of Formula III, where X is chlorine, bromine, or iodine or a sulfonate grouping: Formula (III) with a sulfonamide derivative of the formula R—SO2—NH2 in the presence of a basic agent and a catalytic system formed of a complex between a palladium compound and a ligand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.