Process for the preparation of toltrazuril and an intermediate useful for its preparation
US9802906B1 · kind B1 · utility
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5Claims
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Key dates
| Filing date | Apr 6, 2017 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Apr 6, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C319/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of toltrazuril of formula (I) via the intermediate N-methyl-N′-[3-methyl-4-[4-[(trifluoromethyl)thio]phenoxy]phenyl] imidodicarbonic diamide of formula (III)wherein intermediate (III) is obtained via a novel intermediate without the use of potentially hazardous reagents or potentially unstable intermediates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.