| 主权项 |
1. A cyclohexane derivative with a structure according to formula 1a or 1b having a cis/trans ratio of at least 70/30, where the substituents on the cyclohexyl ring may be in cis or trans position to one another, and a) for formula 1a
R3 to R6 are hydrogen and R1 and R2 independently of one another are selected from the group consisting of C2- to C6-alkyl, C5-alkenyl, C3- to C6-cycloalkenyl and C3- to C6-cycloalkyl, orat least one radical from R3 to R6 is not methyl or hydrogen, and the other radicals R3 to R6 independently of one another are selected from the group consisting of C1- to C6-alkyl, C3- to C6-cycloalkyl, C3- to C6-cycloalkenyl, C2- to C6-alkenyl and hydrogen, and R1 and R2 independently of one another are selected from the group consisting of C1- to C6-alkyl, C2 to C5-alkenyl, C3- to C6-cycloalkenyl and C3- to C6-cycloalkyl, orat least one radical from R1 and R2 is not methyl or ethyl, R3 and R4 are methyl, R5 and R6 are hydrogen, and also R1 and R2 independently of one another are selected from the group consisting of C1- to C6-alkyl, C3- to C6-cycloalkyl, C3- to C6-cycloalkenyl, C2- to C6-alkenyl, orR1 and R2 independently of one another are selected from the group consisting of C1- to C6-alkyl, C3- to C6-cycloalkyl, C3- to C6-cycloalkenyl, C2- to C6-alkenyl, and at least one radical from R3 to R6 is not hydrogen, with the exception of compounds of the formula 1a in which R1 and R2 are methyl or ethyl and at the same time R3 and R4 are each methyl and R5 and R6 are each hydrogen, b) for formula 1b
R1 to R6 independently of one another are selected from the group consisting of C1- to C6-alkyl, C3- to C6-cycloalkyl, C3- to C6-cycloalkenyl, C2- to C6-alkenyl and hydrogen, and at least one radical from R1 and R2 is not hydrogen, and if R1 is hydrogen, R2 is not methyl, C4-alkyl, or vinyl, with the proviso that the summed total number of the carbon atoms in all radicals R1 to R6 for a) and b) is in each case only a whole numerical value from 2 to 20. |
