NOVELTY - Aryl compound (I) excluding e.g. 9,11-dimethoxy-8H-benzofuro(2,3-c)xanthen-8-one, 16-phenyl-16H-dibenzofuro(3,2-a:3',2'-i)xanthen-16-ol, 17'-(2-aminoethyl)-3-oxo-3H-14'-oxa-9'-thiaspiro(2-benzofuran-1,21'-pentacyclo(11.8.0.0(2,10).0(3,8).0(15,20))henicosane)-1'(13'),2'(10'),3'(8'),4',6',11',15'(20'),16',18'-nonaene-12'-carbaldehyde, 3H-14'-oxa-9'-thiaspiro(2-benzofuran-1,21'-pentacyclo(11.8.0.0(2,10).0(3,8).0(15,20))henicosane)-1'(13'),2'(10'),3'(8'),4',6',11',15',17',19'-nonaene,16H-dibenzofuro(3,2-a:3',2'-i)xanthen-16-one, 16-methylene-16H-dibenzofuro(3,2-a:3',2'-i)xanthene, is new.    USE - (I) or oligomer, polymer or dendrimer is useful as a hole transport material in a hole transport layer or a hole injection layer, a matrix material in combination with at least one additional matrix material in an emitting layer or a dopant in an emitting layer of an electronic device, 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 or organic electroluminescent devices (all claimed).    ADVANTAGE - (I) exhibits: improved hole mobility, which allows a reduction of the operating voltage in electronic devices, thus it is suitable as hole transport material for improving operational life and power efficiency of electronic devices; improved temperature-stability, thus it can be largely sublimated without decomposition; high oxidation stability in solution, which is suitable in the purification and handling of itself and in their use in electronic devices; and high purity, thus it improves the performance and durability of the electronic devices.    DETAILED DESCRIPTION - Aryl compound of formula (I) excluding 9,11-dimethoxy-8H-benzofuro(2,3-c)xanthen-8-one, 16-phenyl-16H-dibenzofuro(3,2-a:3',2'-i)xanthen-16-ol, 17'-(2-aminoethyl)-3-oxo-3H-14'-oxa-9'-thiaspiro(2-benzofuran-1,21'-pentacyclo(11.8.0.0(2,10).0(3,8).0(15,20))henicosane)-1'(13'),2'(10'),3'(8'),4',6',11',15'(20'),16',18'-nonaene-12'-carbaldehyde, 3H-14'-oxa-9'-thiaspiro(2-benzofuran-1,21'-pentacyclo(11.8.0.0(2,10).0(3,8).0(15,20))henicosane)-1'(13'),2'(10'),3'(8'),4',6',11',15',17',19'-nonaene,16H-dibenzofuro(3,2-a:3',2'-i)xanthen-16-one, 16-methylene-16H-dibenzofuro(3,2-a:3',2'-i)xanthene, and 16H-dibenzofuro(3,2-a:3',2'-i)xanthene, is new.    A=cyclohexyl compounds of formulae (II) or (III);    X1, X2, X3=BR1, C(R1) 2, Si(R1) 2, C=O, C=NR1, C=C(R1) 2, NR1, O, S, S=O, S(=O) 2, PR1 or P(=O)R1;    X4, X5=CR1, N or P;    Z=CR1 or N;    A1, A2=aryl with 6-60 aromatic ring atoms or heteroaryl with 5-60 aromatic ring atoms, which may be substituted with at least one R2; either    R1, R2=H, D, F, Cl, Br, I, B(OR3) 2, CHO, C(O)R3, CR3=C(R3)2, CN, COOR3, CON(R3) 2, Si(R3) 3, N(R3)2, NO 2, P(=O)(R3) 2, OSO 2R3, OH, S(=O)R3, S(=O) 2R3, straight chain 1-40C alkyl, 1-40C alkoxy, 1-40C thioalkyl, branched or cyclic 3-40C alkyl, 3-40C alkoxy, 3-40C thioalkyl, 2-40C alkenyl or 2-40C alkynyl group having 2 to 40 carbon atoms (where (a) each one is substituted with at least one R3, and at least one nonadjacent CH 2is replaced by -R3C=CR3-, -CC-, Si(R3) 2, Ge(R3) 2, Sn(R3) 2, C=O, C=S, C=Se, C=NR3, -COO-, -CONR3-, NR3, P(=O)(R3), -O-, -S-, SO or SO 2, and (b) at least one H is replaced by D, F, Cl, Br, I, CN or NO 2), optionally (hetero)aromatic ring with 5-60 aromatic ring atoms (where each one is substituted by at least one R3), aryloxy with 5-60 aromatic ring atoms, heteroaryloxy with 5-60 aromatic ring atoms, aralkyl with 5-60 aromatic ring atoms or heteroaralkyl with 5-60 aromatic ring atoms (where each one is substituted by at least one R3), or combination of these systems; or    R1+R2=aliphatic or aromatic ring system; either    R3=H, D, F, Cl, Br, I, B(OR4) 2, CHO, C(O)R 4, CR4=C(R4) 2, CN, COOR4, CON(R4) 2, Si(R4) 3, N(R4) 2, NO 2, P(=O)(R4) 2, OSO 2R4, OH, S(=O)R4, S(=O) 2R4, straight chain 1-40C alkyl, 1-40C alkoxy, 1-40C thioalkyl, branched or cyclic 3-40C alkyl, 3-40C alkoxy, 3-40C thioalkyl, 2-40C alkenyl, 2-40C alkynyl (where (ai) each one is substituted with at least one R4, (bi) at least one nonadjacent CH 2is replaced by R4C=CR4-, -CC-, Si(R4) 2, Ge(R4) 2, Sn(R4) 2, C=O, C=S, C=Se, C=NR4, -COO-,-CONR4, NR4, P(=O)(R4), -O-, -S-, SO or SO 2, and (ci) at least one H is replaced by D, F, Cl, Br, I, CN or NO 2), optionally (hetero)aromatic ring system with 5-60 aromatic ring atoms, aryloxy with 5-60 aromatic ring atoms, heteroaryloxy with 5-60 aromatic ring atoms (where each one is substituted by at least one R4), or combination of these systems; or    at least two R3=aliphatic or aromatic ring system; either    R4=H, D, F, aliphatic, optionally (hetero)aromatic 1-20C organic residue (where at least one H is replaced by D or F; or    at least two R4=aliphatic or aromatic ring system;    X2, X3=C=O; and    X4, X5=CR1.    INDEPENDENT CLAIMS are also included for:    (1) the preparation of (I);    (2) an oligomer, polymer or dendrimer comprising (I), where the bond to the polymer, oligomer or dendrimer is localized at arbitrary substituted positions in (I) with R1 or R2; and    (3) a formulation comprising (I) or the oligomer, polymer or dendrimer and at least one solvent.