Process for the preparation of donepezil
US6844440B2 · kind B2 · utility
2Cited by
2References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2003 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Jun 11, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention provides a process for the preparation of a compound of the formula 6 comprising the hydrolysis and decarboxylation of a compound of the formula 5 according to the reaction: wherein R and R2 independently a C1-C4 alkyl group or an aralkyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.