Process for preparing Tadalafil and its intermediate
US7223863B2 · kind B2 · utility
2Cited by
0References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2006 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Jul 25, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D471/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates an improved process for the preparation of tetrahydro-β-carboline derivative of formula (V) which is useful as an intermediate for the preparation of Tadalafil of formula (I). Moreover, the present invention relates to the process for the preparation of Tadalafil of formula (I)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.