Cyanomethyl substituted tetrahydropyrans useful as fragrances for detergents
US4150037A · kind A · utility
2Cited by
1References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1978 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Jun 23, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D309/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the cyclization of gamma-delta or delta-epsilon unsaturated alcohols in order to obtain certain tetrahydrofuran and tetrahydropyran derivatives which are useful in the perfuming of detergents, the improvement consisting in that the alcohol to be cyclized is reacted with a cationic ion-exchange resin. The useful temperature range is from 20.degree. C. to 150.degree. C.: in practice the alcohol and the resinare boiled together or refluxed until the reaction is completed. A number of examples is reported and physicochemical data are given.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.