Patent ID: 6303194
Filing Date: 2001-10-16
Classification: C07C,C09K

Abstract:
Acetylene derivatives of the formula I ##STR103##in whichR.sup.1 and R.sup.2, independently of one another, are H, --CN, --F, --OCHF.sub.2, --OCF.sub.3, --OCHFCF.sub.3, --OCH.sub.2 CF.sub.3, --OCF.sub.2 --CF.sub.3, an alkyl radical having 1-12 carbon atoms which is unsubstituted, or an alkyl radical having 1-12 carbon atoms which is substituted one or more times by substituents selected from the group consisting of halogen and CN, and in which, in addition, one or more non-adjacent CH.sub.2 groups may each, independently of one another, be replaced by --O--, --S--, --CO--, ##STR104##--CO--O--, --O--CO--, --O--CO--O-- or --CH.dbd.CH-- in such a way that heteroatoms are not connected directly,X.sup.1, X.sup.2,X.sup.3 and X.sup.4 are each, independently of one another, H or --C.ident.C--R.sup.3 in the axial position, where at least one of the groups X.sup.1, X.sup.2, X.sup.3 and X.sup.4 is not H,R.sup.3 is H, alkyl having 1 to 8 carbon atoms, Cl, CN, SF.sub.5 or CF.sub.3,Q is --CH.sub.2 -- or --O--,Y.sup.1 and Y.sup.2, independently of one another, are C or Si,A.sup.1 and A.sup.2, independently of one another, are an unsubstituted trans-1,4-cyclohexylene radical, F-substututed trans-1-4-cyclohexylene radical or CN-substituted trans-1,4-cyclohexylene radical, in which, in addition, one or more non-adjacent CH.sub.2 groups may be replaced by --O-- and/or --S-- ##STR105##or ##STR106##Z.sup.1 and Z.sub.2 are each, 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--, or a single bond, andn and m, independently of one another, are 0, 1, 2 or 3, wherem+n is 1, 2, 3 or 4.