| 摘要 |
Optically active compounds of the formula I <IMAGE> (I) where R is C1-C12-alkyl or -perfluoroalkyl in which one or two non-adjacent CH2 or CF2 groups can also be replaced by -O- and/or -CO- and/or -CO-O- and/or -CH=CH- and/or -CH-halogen- and/or -CHCN- and/or -0-CO-CH-halogen- and/or -O-CO-CHCN-, or is C1-C12-alkyl which can have a terminal chemically reactive group and in which a CH2 group can be replaced by -O-, A1 and A2 are each, independently of one another, 1,4-phenylene which is unsubstituted or substituted by one or two F and/or Cl and/or Br atoms and/or CH3 groups and/or CN groups and in which one or two CH groups can also be replaced by N, 1,4-cyclohexylene in which one or two non-adjacent CH2 groups can also be replaced by -O- and/or -S-, 1,4-piperidinediyl, 1,4-bicyclo[2.2.2]octylene, 2,6-naphthalenediyl, decahydro-2,6-naphthalenediyl or 1,2,3,4-tetrahydro-2,6-naphthalenediyl, A3 is unsubstituted or substituted phenyl, Z is -CO-O-, -O-CO-, -CH2CH2-, -OCH2-, -CH2O-, -C 3BOND C- or a single bond and m is 0, 1, 2 or 3.
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