Patent ID: 7527746
Filing Date: 2009-05-05
Classification: C09K

Abstract:
1. A compound represented by the following general formula (1a) or (1b): wherein R 1 represents a hydrogen atom, a fluorine atom, a chlorine atom, —CN, —NO 2 or an alkyl group having from 1 to 20 carbon atoms, provided that in the alkyl group, an arbitrary hydrogen atom may be replaced by a fluorine atom or a chlorine atom, and arbitrary one or two —CH 2 — groups may be replaced by —O—, —S—, —COO—, —OCO—, —CO—, —CH═CH— or —C≡C—, in which R 1 may be an optically active group; Y 1 and Y 2 each independently represents an alkylene group having from 1 to 20 carbon atoms, provided that in the alkylene group, an arbitrary hydrogen atom may be replaced by a fluorine atom or a chlorine atom, an arbitrary —CH 2 — may be replaced by —O—, arbitrary one or two —CH 2 — groups may be replaced by —COO— or —OCO—, and arbitrary one —CH 2 — may be replaced by —CH═CH— or —C≡C—, in which Y 1 and Y 2 each may be an optically active group; A 1 , A 2 , B 1 and B 2 each independently represents a group selected from 1,4-cyclohexylene, 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, naphthalene-2,6-diyl, tetrahydronaphthalene-2,6-diyl, fluorene-2,7-diyl, 9-methylfluorene-2,7-diyl, 9-ethylfluorene-2,7-diyl, 9,9-dimethylfluorene-2,7-diyl, 9-chlorofluorene-2,7-diyl, 9,9-dichlorofluorene-2,7-diyl, and groups represented by the following formulae (K1), (K2) and (K3), provided that in the 1,4-phenylene group, an arbitrary hydrogen atom may be replaced by a fluorine atom or a chlorine atom, and arbitrary one or two hydrogen atoms may be replaced by a cyano group, a methyl group, a methoxy group, a hydroxyl group, a formyl group, an acetoxy group, an acetyl group, a trifluoroacetyl group, a difluoromethyl group or a trifluoromethyl group; X 1 and X 2 each independently represents a single bond, —COO—, —OCO—, —OCH 2 —, —CH 2 O—, —CONH—, —NHCO—, —CH═CH—COO—, —COO—HC═CH—, —(CH 2 ) 2 —COO—, —OOC—(CH 2 ) 2 —, —(CH 2 ) 2 — or —C≡C—; m represents 0, 1 or 2, provided that when m is 2, two groups represented by A 1 may be the same groups or different groups, and two groups represented by X 1 may be the same groups or different groups; and G represents a hydrogen atom, a fluorine atom, a methyl group, a cyano group or a trifluoromethyl group, provided that a plurality of groups represented by G may be the same groups or different groups: