Patent ID: 6174456
Filing Date: 2001-01-16
Classification: C07C,C09K

Abstract:
A liquid crystalline compound which is represented by the formula (1):R--A.sub.1 --Z.sub.1 --A.sub.2 --Z.sub.2 --A.sub.3 --Z.sub.3 --A.sub.4 --(CH.sub.2).sub.m.X (1)wherein R indicates H or an alkyl group having 1 to 10 carbon atoms (one or more methylene groups (--CH.sub.2 --) in the alkyl group may be replaced by --O--, --S--, --CO--; --CH.dbd.CH-- or --C.tbd.C--, but --O-- or --S-- are not continuous), m indicates an integer of 1 to 10; X indicates F, Cl, Br, I or OH; A.sub.1, A.sub.2, A.sub.3, and A.sub.4, each independently indicate a trans 1,4-cyclohexylene group, a 1,4-phenylene group with the proviso that when at least two of A.sub.1, A.sub.2, A.sub.3, and A.sub.4 are 1, 4-phenylene groups, one of A.sub.1, A.sub.2, A.sub.3, and A.sub.4 may have one hydrogen substituted by a fluorine atom, cyclohexenylenediyl group, a pyrimidine-2,5-diyl group, a pyridine-2,5-diyl group or a 1,3-dioxane-2,5-diyl group; Z.sub.1, Z.sub.2 and Z.sub.3, each independently, indicate --(CH.sub.2).sub.2 -- or a covalent bond, and at least two of Z.sub.1, Z.sub.2, and Z.sub.3, indicated covalent bond; with the proviso that A.sub.2 to A.sub.4 are never all cyclohexylene groups.