| abstract |
Cyclobutane derivatives of the formula I. wherein R 1 is an unsubstituted, at least one halogen or CN substituted alkyl radical with 1-12 C atoms, in which one or more CH 2 groups are each independently of one another by -O-, -S-, -CO-, , -CO-O-, -O-CO-, -O-CO-O- or -CH = CH- can be replaced so that heteroatoms are not directly connected, QC = O, CF 2 or C = CX 1 X 2 , X 1 , X 2 H, Cl or F, Y CH-R 2 , R 2 H, A, A 1 independently of one another, even if they occur more than once, a) trans-1,4-cyclohexylene radical, in which one or more non-adjacent CH 2 groups can also be replaced by -O- and / or -S-, b) 1,4-phenylene radical, where the residues a), b) and d) can be substituted by CN, Cl or F, Z 1 in the event of multiple occurrences independently of one another -CO-O-, -O-CO-, -CH 2 O-, -O-, -O-CH 2 -, -CH 2 CH 2 -, -CH = CH-, - C≡C-, or a single bond, and m means 1 or 2. |