Method for producing 1-unsubstituted pyrazolo[3,4-b]pyridine ketones
US3987051A · kind A · utility
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11Claims
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Key dates
| Filing date | Apr 16, 1975 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | Apr 16, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D471/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A new process for the production of pyrazolo-[3,4-b]pyridine ketones which are unsubstituted in the 1-position comprises reacting a 1-furanylmethylpyrazolo[3,4-b]pyridine ketone with an inorganic strong mineral acid like sulfuric acid, phosphoric acid or polyphosphoric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.