Compound with novel six-membered ring structure for use in organic electronic devices

A compound

• selected from the group consisting of
• wherein
• RA wherein at each occurrence RA is independently of each other selected from the group consisting of fluoroalkyl, F, BR12, B(OR1)2, CHO, C(═O)R1, C(═O)OR1, C(═O)N(R1)2, CR1═C(CN)2, N3, NO2, P(═O)(R1)2, S(═O)R1, S(═O)2R1, heteroaryl, heteroaryl substituted with one or more electron withdrawing groups and aryl substituted with one or more electron withdrawing groups, wherein the electron withdrawing groups are selected from the group consisting of fluoroalkyl, F, B(OR1)2, CHO, C(═O)R1, CN, C(═O)OR1, C(═O)N(R1)2, NO2, P(═O)(R1)2, S(═O)R1, and S(═O)2R1;
• RD is independently of each other of general formula (N-a)
• Ar1′)m—NR12 (N-a)
• wherein
• Ar1′ is a substituted or unsubstituted aromatic with 6 to 30 aromatic ring atoms, or a heteroaromatic ring system with 5 to 30 aromatic ring atoms;
• m is 0 or 1;
• and
• two RS together form a five-membered ring,
• wherein two groups RS together form a five-membered ring of the following formulae (II-A)
• A1 and A3 are at each occurrence independently selected from the group consisting of C(R3)2, O, S, NR3 and C(═O);
• A2 is at each occurrence independently selected from the group consisting of C(R1)2, O, S, NR3 and C(═O);
• and in case two groups A2 are adjacent to each other, A2-A2 may also be selected from the group consisting of ortho-linked arylene- or heteroarylene-group with 5 to 14 aromatic ring atoms, each of which may independently of the other be substituted with R2 as defined above;
• R1 is at each occurrence independently selected from the group consisting of H, D, F, Cl, Br, I, B(OR2)2, CHO, C(═O)R2, CR2═C(R2)2, CN, C(═O)OR2, C(═O)N(R2)2, Si(R2)3, N(R2)2, NO2, P(═O)(R2)2, OSO2R2, OR2, S(═O)R2, S(═O)2R2, OH, SH, linear alkyl-, alkoxy- or thioalkyl-group with 1 to 20 C-atoms or a branched or cyclic alkyl-, alkoxy- or thioalkyl-group with 3 to 20 C-atoms or a alkenyl- or alkinyl-group with 2 to 20 C-atoms, wherein the group may be substituted with one or more of groups R2 and wherein one or more CH2-groups in the group may be replaced by —R2C═CR2—, —C≡C—, Si(R2)2, C═O, C═S, C═NR2, C(═O)O—, C(═O)NR2—, NR2, P(═O)(R2), O, S, SO or SO2, and wherein one or more H-atoms in the group may be replaced by D, F, Cl, Br, I, CN or NO2, or an aromatic or heteroaromatic ring system with 5 to 60 aromatic ring atoms, which can be substituted with one or more groups R2, or an aryloxy- or heteroaryloxy-group with 5 to 60 aromatic ring atoms, which can be substituted with one or more groups R2, or an aralkyl- or heteroaralkyl-group with 5 to 60 aromatic ring atoms, which can be substituted with one or more groups R2, wherein two or more groups R2 may be linked with each other and form an aliphatic or aromatic or heteroaromatic ring;
• R2 is at each occurrence independently selected from the group consisting of H, D, F, alkyl having from 1 to 20 C-atoms, aromatic groups having from 1 to 20 aromatic carbon atoms and heteroaromatic groups having from 1 to 20 aromatic ring atoms, wherein the aromatic groups and the heteroaromatic groups may be substituted with an alkyl having from 1 to 20 carbon atoms;
• and
• R3 is at each occurrence independently selected from the group consisting of F, linear alkyl- or alkoxy-group with 1 to 20 C-atoms, a branched or cyclic alkyl- or alkoxy-group with 3 to 20 C-atoms, each of which may be substituted with one or more of groups R2, wherein one or more non-adjacent CH2-groups may be replaced by R2C═CR2, C≡C, Si(R2)2, C═O, NR2, O, S or CONR2, and wherein one or more H-atom may be replaced with D or F, or an aromatic or heteroaromatic ring system with 5 to 24 aromatic ring atoms, each of which may each be substituted with one or more of groups R2, or an aryloxy- or heteroaryloxy-group with 5 to 24 aromatic ring atoms, which can be substituted with one or more groups R2, or an aralkyl- or heteroaralkyl-group with 5 to 24 aromatic ring atoms, which can be substituted with one or more groups R2, wherein two R2 bound to the same carbon atom may form an aliphatic or aromatic ring system and thus a spiro system;
• or R3 can form together with a neighboring group R1 or R2 an aliphatic ring system,
• provided that in A1-A2-A3 no two heteroatoms are adjacent.