Process and intermediates for the preparation of the thienopyrrole derivatives
US7411074B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | Sep 29, 2003 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Jan 17, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing a compound of formula (I) where R4 and R5 are as defined in the specification; and R6 is hydrogen or a protecting group, which process comprises cyclisation of a compound of formula (II) where R4, R5 and R6 are as defined in relation to formula (I), and R7 is nitrogen-protecting group, and removing the group R7—, and thereafter if desired or necessary, removing any protecting group R6 to obtain the corresponding carboxylic acid. Novel intermediates and the use of the products in the preparation of pharmaceutical compounds is also described and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.