Esters and ethers of 3-methyl-pentane-diol and unsaturated derivatives thereof and their use as aroma chemical

A compound of the general formula (I)

• wherein
• one of the symbols designates a single bond and the other designates a double bond or a single bond,
• R1 is hydrogen, C1-C4-alkyl or —(C═O)—R3,
• R2 is hydrogen, C1-C4-alkyl or —(C═O)—R4,
• R3 is hydrogen or C1-C4-alkyl, and
• R4 is hydrogen or C1-C4-alkyl,
• a stereoisomer thereof, a mixture of stereoisomers thereof, or a mixture of different compounds of formula (I),
• with the proviso that if R1 is hydrogen R2 is different from hydrogen,
• except for the following compounds and mixtures:
• (5-acetoxy-3-methylene-pentyl) acetate,
• [(E)-5-acetoxy-3-methyl-pent-3-enyl] acetate,
• [(Z)-5-acetoxy-3-methyl-pent-3-enyl] acetate,
• (5-acetoxy-3-methyl-pentyl) acetate,
• [(E)-5-formyloxy-3-methyl-pent-3-enyl] formate,
• [(Z)-5-formyloxy-3-methyl-pent-3-enyl] formate,
• (3-methyl-5-propanoyloxy-pentyl) propanoate,
• [5-(2,2-dimethylpropanoyloxy)-3-methyl-pentyl] 2,2-dimethylpropanoate,
• 1,5-dimethoxy-3-methylene-pentane,
• (E)-1,5-dimethoxy-3-methyl-pent-2-ene,
• (Z)-1,5-dimethoxy-3-methyl-pent-2-ene,
• 1,5-dimethoxy-3-methyl-pentane,
• (Z)-1,5-diethoxy-3-methyl-pent-2-ene,
• 1,5-diethoxy-3-methyl-pentane,
• (E)-1,5-diisopropoxy-3-methyl-pent-2-ene,
• (Z)-1,5-diisopropoxy-3-methyl-pent-2-ene,
• 1,5-dibutoxy-3-methylene-pentane,
• (E)-1,5-dibutoxy-3-methyl-pent-2-ene,
• (Z)-1,5-dibutoxy-3-methyl-pent-2-ene,
• 5-isopropoxy-3-methyl-1-pentanol,
• 5-sec-butoxy-3-methyl-1-pentanol,
• 1-acetoxy-5-isopropoxy-3-methyl-2-pentene,
• (5-hydroxy-3-methyl-pentyl) 3-methylbutanoate,
• [3-methyl-5-(3-methylbutanoyloxy)pentyl] 3-methylbutanoate,
• (5-hydroxy-3-methylene-pentyl) acetate,
• [(E)-5-hydroxy-3-methyl-pent-2-enyl] acetate,
• [(Z)-5-hydroxy-3-methyl-pent-2-enyl] acetate,
• (5-hydroxy-3-methyl-pentyl) formate,
• mixture of [(E)-5-acetoxy-3-methyl-pent-3-enyl] acetate and [(Z)-5-acetoxy-3-methyl-pent-3-enyl] acetate,
• mixture of [(E)-3-methyl-5-propanoyloxy-pent-3-enyl] propanoate and [(Z)-3-methyl-5-propanoyloxy-pent-3-enyl] propanoate,
• mixture of (E)-1,5-dimethoxy-3-methyl-pent-2-ene and (Z)-1,5-dimethoxy-3-methyl-pent-2-ene,
• mixture of (E)-1,5-diethoxy-3-methyl-pent-2-ene and (Z)-1,5-diethoxy-3-methyl-pent-2-ene,
• mixture of (E)-3-methyl-1,5-dipropoxy-pent-2-ene and (Z)-3-methyl-1,5-dipropoxy-pent-2-ene,
• mixture of (E)-1,5-dibutoxy-3-methyl-pent-2-ene and (Z)-1,5-dibutoxy-3-methyl-pent-2-ene, and
• mixture of (5-hydroxy-3-methylene-pentyl) acetate, [(E)-5-hydroxy-3-methyl-pent-2-enyl]acetate and [(Z)-5-hydroxy-3-methyl-pent-2-enyl] acetate.