Patent ID: 8450517

Claim:
A photosensitive compound represented by formula (1): wherein in formula (1), Y 1 is a divalent group represented by formula (2-1) or (2-2); A 1 is 1,4-phenylene, 1,4-cyclohexylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, naphthalene-2,6-diyl, tetrahydronaphthalene-2,6-diyl or 1,3-dioxane-2,5-diyl, and in the 1,4-phenylene, arbitrary hydrogen may be replaced by fluorine, chlorine, cyano, hydroxy, formyl, acetoxy, acetyl, trifluoroacetyl, difluoromethyl, trifluoromethyl, alkyl having 1 to 5 carbons or alkoxy having 1 to 5 carbons; Z 1 is a single bond, —COO—, —OCO—, —CH═CH—COO—, —OCO—CH═CH—, —OCO—CH 2 CH 2 —, —CH 2 CH 2 —COO—, —C≡C—COO—, —OCO—C≡C—, —CH 2 O—, —OCH 2 —, —CF 2 O—, —OCF 2 —, —CONH—, —NHCO—, —(CH 2 ) 4 —, —CH 2 CH 2 —, —CF 2 CF 2 —, —CH═CH—, —CF═CF— or —C≡C—; R 1 and R 2 are each independently hydrogen, fluorine, chlorine, —OH, —C≡N, —NO 2 , trifluoromethyl, alkyl having 1 to 10 carbons or alkoxy having 1 to 10 carbons; Q 1 is independently a single bond or alkylene having 1 to 12 carbons, and in the alkylene, arbitrary hydrogen my be replaced by fluorine and arbitrary —CH 2 — may be replaced by —O—, —COO—, —OCO—, —CH═CH— or —C≡C—; n is 0 to 3; and wherein in formulas (2-1) and (2-2), W 1 and W 2 are each independently hydrogen, fluorine, chlorine, trifluoromethyl, alkyl having 1 to 5 carbons or alkoxy having 1 to 5 carbons.