Fragrance mixture
AssigneeSymrise AG
InventorsVijayanand Chandrasekaran, Johannes Panten, Oskar Koch, Edison Diaz Gomez
Life of this patent
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Abstract
A fragrance mixture and its applications, in particular perfume oils, cosmetic agents, application agents or washing and cleaning agents, containing a sensory effective amount of (i) (E)-2-methyl-but-2-endicarboxylic acid diethyl ester, (ii) (Z)-2-methyl-but-2-endicarboxylic acid diethyl ester or (iii) 2-methylenebutanedicarboxylic acid diethyl ester and mixtures thereof and analogous esters derived from these compounds and mixtures.
Claims21
A fragrance mixture comprising a sensory effective amount of one, two or all three compounds selected from the group consisting of:
- formula (i), formula (ii) and formula (iii):
- wherein R1 each represents a linear, branched or cyclic alkyl radical having 1 to 10 carbon atoms, an araliphatic or aromatic radical, and
- wherein R2 each represents a linear, branched or cyclic alkyl radical having 1 to 10 carbon atoms, an araliphatic or aromatic radical.
A process for the preparation of a mono- and/or diester of mesaconic acid comprising the following steps:
- (i) reacting itaconic acid with acetic anhydride to obtain itaconic acid anhydride;
- (ii) isomerization of itaconic acid anhydride to citraconic acid anhydride;
- (iii) esterification of citraconic acid anhydride with an aliphatic, araliphatic or aromatic alcohol having 1 to 10 carbon atoms or diol having 1 to 5 hydroxyl groups to give a mono- and/or diester of the citraconic acid;
- and
- (iv) rearrangement of the mono- and/or diester of the citraconic acid to a mono- and/or diester of mesaconic acid.
A process for the preparation of a mono- and/or diester of mesaconic acid comprising the following steps:
- (i) providing a solution containing at least one mono- and/or diester of citraconic acid, and optionally, a solvent;
- (ii) Adding iodine to the solution;
- (iii) heating the iodine-containing solution to about 170 to 200° C.;
- and
- (iv) optionally, distillative purification of the resulting product.
(canceled)
Dependencies are inferred from the claim text.