Process for the preparation of acyloxybenzenesulfonates
US6790981B2 · kind B2 · utility
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28References
22Claims
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Key dates
| Filing date | Dec 13, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Dec 13, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of acyloxybenzenesulfonates starting from carbonyl halides and salts of phenolsulfonic acid which have a low water content. Surprisingly, it was discovered that acyloxybenzenesulfonates can be prepared in high yields and good grades, irrespective of the grade or reactivity of the phenolsulfonic acid derivative, if the reaction of the phenolsulfonic acid with an alkanecarboxylic acid derivative is carried out in an aliphatic or aromatic solvent in the presence of 0.5 to 25% by weight of a polyglycol ether.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.