Processes for the preparation of benzo(chalcogeno)(4,3,2-cd)indazoles and intermediates thereof
US4806654A · kind A · utility
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21Claims
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Key dates
| Filing date | Feb 11, 1988 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Feb 11, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P35/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Improved processes for producing substituted benzo(chalcogeno)[4,3,2-cd] indazoles. The processes produce compounds in higher yields and of greater purity by using a novel sequence of acylation chemistry and easily removed protecting groups. The compounds produced have antibacterial, antifungal, antileukemic, and antitumor activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.