Process for the preparation of 1-4-disubstituted-5 (4H)-tetrazolinones
US5767286A · kind A · utility
5Cited by
2References
6Claims
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Key dates
| Filing date | Sep 23, 1994 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Sep 23, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D257/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
1,4-Disubstituted-5(4H)-tetrazolinones of the formula (I) ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 have the meanings given in the specification), which are known to be useful as herbicides, can be obtained in very good yields by reacting the corresponding 1-substituted-5(4H)-tetrazolinones with the corresponding carbamoyl chlorides in the presence of 4-dimethylaminopyridine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.