Patent ID: 6329027
Filing Date: 2001-12-11
Classification: C07C,C07F,C09K

Abstract:
A chlorobenzene derivative expressed by the general formula (1)Ra--A.sub.1 --Z--A.sub.2.paren open-st.Z.sub.2 --A.sub.3.paren close-st..sub.m.paren open-st.Z.sub.3 --A.sub.4.paren close-st..sub.n Rb (1)wherein Ra represents a straight chain or branched alkyl group having 1 to 20 carbon atoms in which group any methylene group (--CH.sub.2) may be replaced by --O--, --CO--, --CH.dbd.CH--, --C.ident.C--, --SiH.sub.2 --, or cyclobutane-1,3-diyl, but in no case continues --O--, and in no case continue --O-- and --CO--, and one or more hydrogen atoms in the Ra may be replaced by a halogen atom; Rb represents a group selected from the Ra, or a halogen atom; A.sub.1, A.sub.2, A.sub.3, and A.sub.4 independently represent trans-1,4-cyclohexylene or 1,4-phenylene in which ring any --CH.sub.2 -- may be replaced by --O--, >CH-- may be replaced by >SiH--, and --CH.dbd. may be represented by --N.dbd., respectively, and one or two hydrogen atoms on the 1,4-phenylene may be replaced by a chlorine atom and/or fluorine atom provided that at least two rings among A.sub.1, A.sub.2, A.sub.3 and A.sub.4 are 1,4-phenylenes, and at least three hydrogen atoms among all hydrogen atoms on the 1,4-phenylenes are replaced by one chlorine atom and at least two fluorine atoms; Z.sub.1, Z.sub.2 and Z.sub.3 independently represent single bond or an alkylene group having 1 to 4 carbon atoms in which group one or more hydrogen atoms may be replaced by a halogen atom, any methylene group (--CH.sub.2 --) in the alkylene group may be replaced by --O--, --CO--, --CH.dbd.CH--, --C.ident.C--, or --SiH.sub.2 -- but in no case continues --O--, and in no case continue --O-- and --CO--; and m is 1, and n is 0 or 1.