| abstract |
The present invention relates to compounds having terminal alkyloxypropenyl groups of the general formula (I), their preparation, liquid crystal mixtures containing these compounds as well as their use for electroluminescent purposes:n n n n n n n n Wherein each ring A 1 and A 2 are each independently an unsubstituted or halogen-substituted 1,4-phenylene or trans 1,4-cyclohexylene, optionally substituted with 1 or 2 CH groups by nitrogen Or trans-1,3-dioxane-2,5-diyl; n is 0 or 1;n n n Z 1 and Z 2 are independently a single covalent bond or -CH 2 CH 2- , -COO-, -OOC-, -OCH 2- , -CH 2 O-,-(CH 2 ) 4- , -O ( CH 2 ) 3 -,-(CH 2 ) 3 O-, trans form -O-CH 2 -CH = CH-, -CH = CH-CH 2 -O-,-(CH 2 ) 2 CH = CH- Or -CH = CH- (CH 2 ) 2- ; R 1 represents an alkyl group; R 2 is halogen, cyano, trifluoroacetyl, optionally one -CH 2 -group or two non-adjacent -CH 2 -groups are replaced with oxygen and / or -CH 2 CH 2 -group is -CH = CH Optionally substituted fluorine-substituted alkyl having 1 to 12 carbon atoms substituted by-. |