5-Alkylbicyclo[4.3.0]non-1-en-3-one and 5-alkylbicyclo[4.3.0]nonane-3-one perfume compositions
US4206089A · kind A · utility
3Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1978 |
| Grant date | Jun 3, 1980 |
| Priority date | — |
| Expiry date | Mar 21, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C49/633
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel bicyclic ketones having the structure: ##STR1## wherein R is a C.sub.1 -C.sub.5 alkyl group, either straight-chain or branched, and saturated analogs have been prepared. These compounds exhibit floral and woody odors and/or desirable flavor properties, and are useful as fragrance and/or flavor materials. The compounds are conveniently prepared from alkylidene cyclopentanones by Michael addition with alkyl metalloacetoacetates and subsequent decarboxylative cyclization of the adducts. The saturated analogs may then be prepared by hydrogenation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.