Method of preparation of florasulam
US12134618B2 · kind B2 · utility
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4References
18Claims
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Key dates
| Filing date | Oct 10, 2018 |
| Grant date | Nov 5, 2024 |
| Priority date | — |
| Expiry date | Jun 21, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01N43/90
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present disclosure concerns a method for preparing florasulam which involves treating a solution of 2,6-difluoroaniline in 1,2-propylene glycol with: a) sulfonyl chloride III and then b) a base to provide, after workup and isolation, florasulam (I) in yields of about 65-85%. The treatment of 2,6-difluoroaniline with sulfonyl chloride III and the base are conducted by controlled additions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.