Preparation of sulfonic acid anhydrides
US8222450B2 · kind B2 · utility
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Key dates
| Filing date | Jul 25, 2007 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Jul 9, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Sulfonic acid anhydrides, and more particularly triflic anhydride, are prepared by reacting a sulfonic acid or a mixture of two sulfonic acids with a reactant exhibiting acid pseudohalide tautomerism and containing at least one carbon atom which is involved in the tautomerism bearing two halogen atom substituents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.