NOVELTY - Substituted benzene derivatives (I) are new.    USE - (I) or the oligomer, polymer or the dendrimer is useful as a hole transport material in a hole transport layer, as a matrix material in an emitting layer, as an electron blocking material or exciton-blocking material, or as a matrix material in a phosphorescent-emitting layer of electronic devices, preferably organic integrated circuits, organic field-effect transistors, organic thin film transistors, organic light-emitting transistors, organic solar cells, organic optical detectors, organic photoreceptors, organic field-quench devices, light-emitting electrochemical cells, organic laser diodes and organic electroluminescent devices (all claimed).    ADVANTAGE - (I) is oxidation stable and temperature stable, and exhibits high glass transition temperature and high-lying excited triplet state. The electronic device comprising (I) exhibits good performance efficiency and long service life, and requires low operating voltage.    DETAILED DESCRIPTION - Substituted benzene derivatives of formula (I) are new.    A = -N(AR1)2 or heteroaryl moiety of formula (IIa);    G = heteroaryl with 5-30 aromatic ring atoms (optionally substituted by at least one group R2); either    Ar1 = (hetero)aromatic ring with 5-30 aromatic ring atoms (optionally substituted by at least one group R2); or    2Ar1+Y1 (which connects 2 Ar1)+N of A = ring;    R1 = 1-20C alkyl, 1-20C alkoxy, 1-20C thioalkyl (all linear) or 3-20C alkyl, 3-20C alkoxy, 3-20C thioalkyl (all branched or cyclic), 2-20C alkenyl, 2-20C alkynyl (in all groups at least one CH2 group may be replaced by -R3C=CR3-, -CC-, Si(R3)2, C=O, C=S, C=NR3, -C(=O)O-, -C(=O)NR3, NR3, P(=O)(R3), -O-, -S-, SO or SO2, and in all groups at least one H may be replaced by D, F, Cl, Br, I, CN or NO2), aromatic ring with 6-60 aromatic ring atoms, heteroaromatic ring with 5-60 aromatic ring atoms, which is not bonded through ring N, (hetero)aryloxy with 5-60 aromatic ring atoms, (hetero)aralkyl with 5-60 aromatic ring atoms (all optionally substituted by at least one group R3), F, Cl, Br, I, B(OR3)2, CHO, C(=O)R3, CR3=C(R3)2, CN, C(=O)OR3, C(=O)N(R3)2, Si(R3)3, NO2, P(=O)(R3)2, OSO2R3, OR3, S(=O)R3 or S(=O)2R3; either    R2 = 1-20C alkyl, 1-20C alkoxy, 1-20C thioalkyl (all linear) or 3-20C alkyl, 3-20C alkoxy, 3-20C thioalkyl (all branched or cyclic), 2-20C alkenyl, 2-20C alkynyl (in all groups at least one CH2 group may be replaced by -R3C=CR3-, -CC-, Si(R3)2, C=O, C=S, C=NR3, -C(=O)O-, -C(=O)NR3, NR3, P(=O)(R3), -O-, -S-, SO or SO2, and in all groups at least one H may be replaced by D, F, Cl, Br, I, CN or NO2), (hetero)aromatic ring with 5-60 aromatic ring atoms, (hetero)aryloxy with 5-60 aromatic ring atoms, (hetero)aralkyl with 5-60 aromatic ring atoms (all optionally substituted by at least one group R3), H, D, F, Cl, Br, I, B(OR3)2, CHO, C(=O)R3, CR3=C(R3)2, CN, C(=O)OR3, C(=O)N(R3)2, Si(R3)3, N(R3)2, NO2, P(=O)(R3)2, OSO2R3, OR3, S(=O)R3 or S(=O)2R3; or    at least 2R2 = ring; either    R3 = 1-20C alkyl, 1-20C alkoxy, 1-20C thioalkyl (all linear) or 3-20C alkyl, 3-20C alkoxy, 3-20C thioalkyl (all branched or cyclic), 2-20C alkenyl, 2-20C alkynyl (in all groups at least one CH2 group may be replaced by -R4C=CR4-, -CC-, Si(R4)2, C=O, C=S, C=NR4, -C(=O)O-, -C(=O)NR4, NR4, P(=O)(R4), -O-, -S-, SO or SO2, and in all groups at least one H may be replaced by D, F, Cl, Br, I, CN or NO2), (hetero)aromatic ring with 5-60 aromatic ring atoms, (hetero)aryloxy with 5-60 aromatic ring atoms, (hetero)aralkyl with 5-60 aromatic ring atoms (all optionally substituted by at least one group R4), H, D, F, Cl, Br, I, B(OR4)2, CHO, C(=O)R4, CR4=C(R4)2, CN, C(=O)OR4, C(=O)N(R4)2, Si(R4)3, N(R4)2, NO2, P(=O)(R4)2, OSO2R4, OR4, S(=O)R4 or S(=O)2R4; or    at least 2R3 = ring; either    R4 = 1-20C aliphatic organic group, 1-20C (hetero)aromatic organic group (in all groups at least one H may be replaced by D or F), H, D or F; or    at least 2R4 = ring; and    Y1 = single bond, BR2, C(R2)2, Si(R2)2, NR2, PR2, P(=O)R2, P(=S)R2, O, S, S=O or S(=O)2.    INDEPENDENT CLAIMS are also included for:    (1) preparing (I);    (2) an oligomer, polymer or dendrimer comprising (I), where the bonds to the oligomer, polymer or dendrimer are localized at any position in (I) substituted with R1, R2 or R3;    (3) a formulation comprising (I) or at least one oligomer, polymer or dendrimer, and at least one solvent; and    (4) an electronic device comprising (I) or at least one oligomer, polymer or dendrimer.