Patent ID: 8148045

Claim:
An oxime ester compound represented by the following general formula (I): wherein, R 1 represents CN, a C 1-20 alkyl group, a C 6-30 aryl group, or a C 7-30 arylalkyl group; a hydrogen atom in the substituents represented by R 1 may optionally be substituted by OR 21 , COR 21 , SR 21 , a halogen atom, or COOR 21 ; R 21 represents a hydrogen atom, or a C 1-20 alkyl group; R 2 represents R 11 ; R 11 represents a C 1-20 alkyl group, a C 6-30 aryl group, or a C 7-30 arylalkyl; a hydrogen atom in the substituents represented by R 11 may optionally be substituted by a halogen atom; an alkylene portion in the substituents represented by R 1 , R 11 , and R 21 may be interrupted 1 to 5 times by —O—, —S—, —COO—, —OCO—, or —NR 24 —; R 24 represents a hydrogen atom, a C 1-20 alkyl group, a C 6-30 aryl group, or a C 7-30 arylalkyl group; an alkyl portion in the substituents represented by R 11 and R 21 may have a branched side chain or may be cyclopentyl or cyclohexyl; R 3 and R 4 each independently represent R 11 , OR 11 , CN, hydroxyl group, or a halogen atom; a and b each independently represent an integer of 0 to 4; X represents a sulfur atom; and R 5 represents OH, COOH, or a group represented by the following general formula (II); wherein, Z 1 is a bonding hand and represents —O—, —S—, —OCO—, or —COO—; Z 2 is a bonding hand and represents a C 1-20 alkyl group, a C 6-30 aryl group, or a C 7-30 arylalkyl group, each of which being substituted by one to three of R 6 ; an alkylene portion in the bonding hand represented by Z 2 may be interrupted 1 to 5 times by —O—, —S—, —COO—, or —OCO—; an alkylene portion in the bonding hand represented by Z 2 may have a branched side chain or may be cyclohexylene; R 6 represents OR 41 or COOR 41 ; R 41 represents a hydrogen atom; and c represents an integer of 1 to 3.