Patent ID: 6051288
Filing Date: 2000-04-18
Classification: C07C,C07D,C09K

Abstract:
A liquid crystalline compound expressed by general formula (1) ##STR1395## wherein R represents an alkyl group or alkoxy group having 1 to 10 carbon atoms, or an alkenyl group having 2 to 10 carbon atoms (any methylene group (--CH.sub.2 --) in the alkenyl group may be replaced by oxygen atom (--O--) provided that in no case two or more methylene groups are continually replaced by oxygen atom), m and n are independently 0 or 1, A.sub.1, A.sub.2, and A.sub.3 are independently trans-1,4-cyclohexylene group, 1,4-phenylene group one or more hydrogen atoms on the ring of which may be replaced by F, pyrimidine-2,5-diyl group, pyridine-2,5-diyl group, or 1,3-dioxane-2,5-diyl group, Z.sub.1, Z.sub.2, and Z.sub.3 independently represent --COO--, --OCO--, --(CH.sub.2).sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, or a covalent bond provided that at least one of Z.sub.1, Z.sub.2, and Z.sub.3 represents ester bond, --CH.sub.2 O--, or --OCH.sub.2 --; X represents CF.sub.3, CF.sub.2 H, CFH.sub.2, OCF.sub.3, OCF.sub.2 H, or CN, and Y represents H or F, provided that when X is CN, then n is 0, m is 1, A.sub.2 is trans-1,4-cyclohexylene group, A.sub.1 is 1,4-phenylene group one or more hydrogen atoms on the ring of which are replaced by F, Z.sub.2 represents a covalent bond, Z.sub.1 is ester bond, and Y represents F.