Process for the preparation of cyclic diketones
US6855831B2 · kind B2 · utility
1Cited by
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1Claims
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Key dates
| Filing date | Apr 8, 2003 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Apr 8, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2602/44
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the preparation of compounds of formula I: wherein the substituents are as defined in claim 1, by conversion of a compound of formula II: reaction of that compound with a compound of formula IV:X—C(O)—Q (IV),wherein X is a leaving group, to form a compound of formula V: and treatment of that compound in the presence of a base with catalytic amounts of cyanide ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.