Patent ID: 8202679

Claim:
An oxime ester compound represented by general formula (I): wherein R 1 and R 2 each independently represent R 11 , OR 11 , COR 11 , SR 11 , CONR 12 R 13 , or CN; R 11 , R 12 , and R 13 each represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, or a heterocyclic group having 2 to 20 carbon atoms, the alkyl group, the aryl group, the arylalkyl group, and the heterocyclic group optionally substituted with OR 21 , COR 21 , SR 21 , NR 22 R 23 , CONR 22 R 23 , —NR 22 —OR 23 , —NCOR 22 —OCOR 23 , —C(═N—OR 21 )—R 22 , —C(═N—OCOR 21 )—R 22 , CN, a halogen atom, —CR 21 ═CR 22 R 23 , —CO—CR 21 ═CR 22 R 23 , a carboxyl group, or an epoxy group; R 21 , R 22 , and R 23 each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, or a heterocyclic group having 2 to 20 carbon atoms; the methylene units of the alkylene moiety of the substituents represented by R 11 , R 12 , R 13 , R 21 , R 22 , and R 23 may be interrupted by an unsaturated linkage, an ether linkage, a thioether linkage, an ester linkage, a thioester linkage, an amido linkage, or a urethane linkage at 1 to 5 sites thereof; the alkyl moiety of the substituents represented by R 11 , R 12 , R 13 , R 21 , R 22 , and R 23 may be branched or cyclic; an alkyl terminal of the substituents represented by R 11 , R 12 , R 13 , R 21 , R 22 , and R 23 may have an unsaturated bond; R 12 and R 13 , and R 22 and R 23 may be connected to each other to form a ring; R 3 and R 4 each independently represent R 11 , OR 11 , SR 11 , COR 11 , CONR 12 R 13 , NR 12 COR 11 , OCOR 11 , COOR 11 , SCOR 11 , OCSR 11 , COSR 11 , CSOR 11 , CN, a halogen atom, or a hydroxyl group; a and b each independently represent an integer of 0 to 4; X represents an oxygen atom, a sulfur atom, a selenium atom, CR 31 R 32 , CO, NR 33 , or PR 34 ; R 31 , R 32 , R 33 , and R 34 each independently represent R 11 , OR 11 , COR 11 , SR 11 , CONR 12 R 13 , or CN; when X is CR 31 R 32 , R 3 and R 4 may be connected to each other to form a ring, or R 3 may be connected to one of the carbon atoms of the benzene ring neighboring via —X— to form a cyclic structure; when X is an oxygen atom, a sulfur atom, a selenium atom, or PR 34 , R 3 may be connected to one of the carbon atoms of the benzene ring neighboring via —X— to form a ring, or R 3 and R 4 may be connected to each other to form a ring; and each of R 31 , R 32 , R 33 , and R 34 may independently be connected to either one of the neighboring benzene rings to form a ring.