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Perfumery compositions
| Details |
Inventors: Ansari, Hifzur R.; Schleppnik, Alfred A.;
Assignee: Bush Boake Allen Limited (London, GB2)
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:
3,3-Dimethyl-1,5-dioxaspiro [5,5] undecane is useful in perfumery compositions. It can be made economically by reaction of cyclohexanone with neopentyl glycol in the presence of an acid, generally paratoluene sulphonic acid, under dehydrating conditions, generally by refluxing with a non-polar solvent. |
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DETAILED DESCRIPTION We claim: 1.
A perfumery composition comprising 3,3-dimethyl-1,5-dioxaspiro [5,5] undecane and a perfumery composition carrier.
2.
A composition according to claim 1 including at least one other odiferous compound.
3.
A composition according to claim 1 which comprises 3 to 40% by weight of 3,3-dimethyl-1,5-dioxaspiro [5,5] undecane and that is a perfumery concentrate that can be incorporated into a consumer composition.
4.
A composition according to claim 1 that is a consumer composition selected from shampoos, creams, lotions, room sprays, cleansers, soaps and detergents.
5.
A process in which 3,3-dimethyl-1,5-dioxaspiro [5,5] undecane is made by reacting cyclohexanone with neopentyl glycol in the presence of an acid under dehydrating conditions.
6.
A process according to claim 5 in which the acid is paratoluene sulphonic acid.
7.
A process according to claim 5 conducted by refluxing cyclohexanone, neopentyl glycol and a non-polar solvent in the presence of paratoluene sulphonic acid.
Description:
This invention relates to compounds of value as synthetic perfumery compounds.
If a compound is to serve as a synthetic perfumery compound it has to comply with three essential requirements and failure of any of these requirements will prevent it being a useful synthetic perfumery compound.
One requirement is that the compound has, at low concentrations, a pleasant odour and can be blended with other perfumery compounds to give pleasant blended odours.
Another requirement is that it is stable in compositions in which it can be used commercially, for instance when in soap or shampoo its odour and other properties must not change on storage.
The third requirement is that the compound must be capable of being synthesized at low cost from readily available starting materials.
There is little or no commercial interest in compounds as synthetic perfumery compounds if their synthesis requires expensive and poorly available starting materials or if it requires expensive process steps, since the reason for providing synthetic perfumery compounds is to get away from the expense of natural perfumery compositions
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