| abstract |
Fluoro-substituted phenyl-cyclohexylacetylenes have the formula: ##STR1## wherein R signifies alkyl, alkoxy, alkenyl or alkenyloxy with 1 or, respectively, 2 to 12 carbon atoms in which one CH 2 group can be replaced by oxygen and/or one or more hydrogen atoms can be replaced by fluorine atoms, with the proviso that two oxygen atoms are not directly adjacent; n A 1 represents 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl; n A 2 signifies trans-1,4-cyclohexylene or 1,4-phenylene which is optionally substituted with fluorine; n Z 1 signifies a single covalent bond, --CH 2 CH 2 --, --OCH 2 --, --CH 2 O--, --(CH 2 ) 4 --, --O(CH 2 ) 3 --, --(CH 2 ) 3 O-- or, when ring A 1 represents a saturated ring, also the trans form of --CH═CH(CH 2 ) 2 -- or --CH═CHCH 2 O--; n Z 2 signifies a single covalent bond, --CH 2 --CH 2 --, --OCH 2 --, --CH 2 O--, --(CH 2 ) 4 --, --O(CH 2 ) 3 --, --(CH 2 ) 3 O-- or the trans form of --CH═CH(CH 2 ) 2 -- or --CH═CHCH 2 O--; n n signifies 0 or 1; n m signifies 0 or 1, with the proviso that n+m is <1; and n X signifies cyano, --CF 3 , --OCF 3 , --OCHF 2 , --CH═CF 2 , --CH═CHCl, alkyl, alkenyl, alkoxy, alkenyloxy or alkoxyalkyl with 1 or, respectively, 2 to 6 carbon atoms or on trans-1,4-cyclohexylene also --CH═CHF or --CH═CHCl or on 1,4-phenylene also fluorine or chlorine. |