Patent ID: 6177154
Filing Date: 2001-01-23
Classification: C07C,C07D,C09K

Abstract:
A liquid crystalline compound expressed by the general formula (1) ##STR1031##wherein R.sub.0 represents an alkyl group having 1 to 10 carbon atoms in which alkyl group one or more not-adjacent methylene groups may be replaced by oxygen atom, sulfur atom, --SiH.sub.2 --, --CH.dbd.CH--, or --C.tbd.C--, and any hydrogen atom in the alkyl group may be replaced by a halogen atom;R.sub.1 represents an alkyl group having 1 to 10 carbon atoms;ring A.sub.0, ring A.sub.1, ring A.sub.2, and ring A.sub.3 independently represent 1,4-cyclohexylene group, 1,3-dioxane-2,5-diyl group, 1,4-phenylene group in which one or more hydrogen atoms on the ring may be replaced by a halogen atom, pyridine-2,5-diyl group, or pyrimidine-2,5-diyl group;Z.sub.0, Z.sub.1, Z.sub.2, and Z.sub.3 independently represent --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C--, --CH.sub.2 O--, --OCH.sub.2 --, --CF.sub.2 O--, --OCF.sub.2 --, --COO--, --OCO--, --(CH.sub.2).sub.4 --, or single bond;Q.sub.1 and Q.sub.2 independently represent hydrogen atom or a halogen atom;Q.sub.3 represents hydrogen atom, a halogen atom, or R.sub.2 O group;R.sub.2 represents an alkyl group having 1 to 10 carbon atoms;Y represents a halogen atom, cyano group, or an alkyl group having 1 to 10 carbon atoms in which alkyl group one or more not-adjacent methylene groups may be replaced by oxygen atom, sulfur atom, --SiH.sub.2 --, --CH.dbd.CH--, or --C.tbd.C--, and any hydrogen atom in the alkyl group may be replaced by a halogen atom;l, m, n and o are independently 0, 1, or 2 with the proviso that 1.ltoreq.l+m+n+o.ltoreq.3;provided that when one of Z.sub.0, Z.sub.1, Z.sub.2, and Z.sub.3 is --COO--, then Y is not cyano group, andthat when n=o=0, Z.sub.0 and Z.sub.1 are a group selected from --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, --(CH.sub.2).sub.4 --, --C.tbd.C--, and single bond, Q.sub.3 is fluorine atom, and Y is fluorine atom or chlorine atom, then R.sub.2 is C.sub.2 H.sub.5 group; andthe atom which constitutes this compound may be replaced by its isotope.