Terpene-derived compounds and methods for preparing and using same
The invention relates to terpene-derived compounds, such as acids, esters thereof, produced by ozonolysis of terpenes, and to alcohols, amides, nitriles derived therefrom, as well as to processes for synthesizing them. Specifically, 2,3,7-trimethyloct-6-en-2-ol, 2,3,7-trimethyloct-7-en-2-ol, or a mixture thereof, produced by Grignard reaction of a terpene derived carboxylate with methyl magnesium bromide is disclosed.
1. A compound of Formula IV:
or a salt (hereof, wherein one of the is a single bond and the other is double bound, and R 3 is unsubslitutcd or substituted C 1 -C 10 alkyl,
wherein the compound is selected from 2,3,7-trimethyloct-6-en-2-ol, 2,3,7- trimcthyloct-7-en-2-ol, and salts thereof.
2. A composition comprising 2 ,3,7-trimethyloct-6-en-2-ol, or 2,3,7-trimethyloct 7-en-2-ol, or salts thereof, or a mixture thereof.
3. A method of producing at least one compound according to claim 1 , the method comprising:
providing an aqueous mixture of compound of Formula II or Formula III
reacting the aqueous mixture with R 3 MgBr, wherein R 1 is H, unsubstitutcd or substituted C 1 -C 10 alkyl, or unsubstitutcd or substituted C 2 -C 10 alkenyl, to form the compound of Formula IV.
4. The method of claim 3 , wherein the reaction is performed under an inert gas.
5. The method of claim 4 , wherein the R 3 MgBr in the presence of an organic solvent and is added to the aqueous mixture to form a reaction mixture which is then stirred at a first temperature for a first time period to produce an intermediate mixture.
6. The method of claim 5 , the method further comprising stirring the intermediate mixture at a second temperature for a second time period to produce a final mixture.
7. The method of claim 6 , the method further comprising cooling the final mixture and quenching the cooled final mixture to produce a quenched final mixture.
8. The method of claim 7 , the method further comprising removing the organic solvent from the quenched final mixture to produce a residue.
9. The method of claim 8 , the method further comprising adding an acid to the residue to form an aqueous layer.
10. The method of claim 9 , the method further comprising extracting the aqueous layer with an organic solvent to obtain at least one organic fraction containing at least one compound of formula IV.
11. The method of claim 10 , the method further comprising purifying the organic fraction.
12. The method of claim 11 , wherein R 1 is (CH)(CH 2 )(CH 3 ) 2 and R 3 is CH 3 .
13. The method of claim 12 , wherein the at least one compound of formula IV comprises 2,3,7-trimethyloct-6-en-2-ol, 2,3,7-trimethyloct-7-en-2-ol, or salts thereof, or a mixture thereof.
14. The composition of claim 2 , wherein the composition comprises 2,3,7-trimethyloct-6-en-2-ol and 2,3,7-trimethyloct-7-en-2-ol, or salts thereof.
15. The composition of claim 14 , wherein the composition comprises 2,3,7-trimethyloct-6-en-2-ol and 2,3,7-trimethyloct-7-en-2-ol, or salts thereof, in a ratio of about 5:5:1.
16. The composition of claim 2 wherein the composition is a fragrance composition.
17. The composition of claim 15 , wherein the composition is a fragrance composition.
18. The composition of claim 14 , wherein the composition comprises the mixture of 2,3,7-trimethyloct-6-en-2-ol and 2,3,7-trimethyloct-7-en-2-ol, having the proton NMR spectrum shown in FIG. 4 .
19. The composition of claim 18 , wherein the composition is a fragrance composition.