Production process of 2-(tetrazol-5-yl)-4-oxo-4H-benzopyran
US5597929A · kind A · utility
1Cited by
0References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1996 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | Feb 23, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D405/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for producing a 2-(tetrazol-5-yl)-4-oxo-4H-benzopyran of general formula (1): ##STR1## which comprises reacting a hydroxyacetophenone of general formula (2): ##STR2## with a tetrazole compound of general formula (3): ##STR3## in the presence of a base in a solvent composed mainly of at least one selected from hydrocarbons, halogenated hydrocarbons and alcohols, and then treating the reaction mixture under acidic conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.