Process for manufacturing chlorolactones from unsaturated carboxylic acids
US4413133A · kind A · utility
1Cited by
3References
9Claims
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Key dates
| Filing date | Nov 13, 1981 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Nov 13, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D493/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for manufacturing chlorolactones by reacting, within an ahydrous organic solvent, a metal N-chlorosulfonamidate of the formula ##STR1## wherein R is a hydrogen or halogen atom or an alkyl radical, Ar is a mono- or polycyclic divalent aromatic radical and M is an alkali metal, with a substantially stoichiometrical proportion of an aliphatic or alicyclic carboxylic acid having at least one double bond separated from the COOH group by at least 2 carbon atoms, in the presence of a substantially stoichiometrical amount of a strong acid whose conjugate base is weakly nucleophilic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.