Patent ID: 6171664
Filing Date: 2001-01-09
Classification: C07C,C09K

Abstract:
A tolan compound of the formula ##STR33##in whichR.sup.1 is H or an alkyl radical having 1-12 carbon atoms which is unsubstituted, monosubstituted by CN or CF, or monosubstituted to perhalosubstituted by halogen, where one or more non-adjacent CH.sub.2 groups in these radicals are, independently of one another, each optionally replaced by --CH.dbd.CH--, --O--, --S--, --CO--, ##STR34##--CO--O--, --O--CO--, or --O--CO--O--,R.sup.2 is alkyl or alkoxy having 1 to 10 carbon atoms which is unsubstituted or monosubstituted to perhalosubstituted by halogen; alkenyl or alkenyloxy having 2 to 10 carbon atoms which is unsubstituted or at least monosubstituted by --CN, CF.sub.3 or --F; or --F, --Cl, --CF.sub.3, --OCHF.sub.2, --OCF.sub.3, --OCHFCF.sub.3 or --OCF.sub.2 CF.sub.3,L.sup.1 is either H or F,Q is --O-- or a single bondA are independently a trans-1,4-cyclohexylene radical, in which one or more non-adjacent CH.sub.2 groups are optionally replaced by --O-- and/or --S--; or a 1,4-cyclohexenylene radical where the rings are optionally substituted by CN, Cl or F,Z are, independently of one another, --CO--O--, --O--CO--, --CH.sub.2 O--, --O--, --O--CH.sub.2 --, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C-- or a single bond,n is 0, 1, 2, 3 or 4 andm is 0, 1 or 2,with the proviso that compounds in which m is 0 and simultaneously R.sup.2 is alkyl or alkoxy are excluded.