| CPC H10K 85/6572 (2023.02) [C07D 471/04 (2013.01); H10K 85/615 (2023.02); H10K 85/654 (2023.02); H10K 50/16 (2023.02); H10K 50/171 (2023.02)] | 13 Claims |

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1. Compound of formula (I)
![]() wherein R1 and R2 are independently selected from the group consisting of substituted or unsubstituted C6 to C48 aryl and substituted or unsubstituted C2 to C42 heteroaryl;
the substituents of R1 and R2, if present, are selected from the group consisting of deuterium, fluorine, RF, C1 to C20 linear alkyl, C3 to C20 branched alkyl, C1 to C12 linear fluorinated alkyl, CN, RCN, C6 to C20 aryl, C2 to C20 heteroaryl, P(═O)R′R″, wherein each R, R′ and R″ is independently selected from the group consisting of C1 to C20 linear alkyl, C1 to C20 alkoxy, C1 to C20 thioalkyl, C3 to C20 branched alkyl, C3 to C20 cyclic alkyl, C3 to C20 branched alkoxy, C3 to C20 cyclic alkoxy, C3 to C20 branched thioalkyl, C3 to C20 cyclic thioalkyl, Co to C20 aryl and C2 to C20 heteroaryl; n and m are independently selected from 0, 1, 2 and n+m≥1;
n and m are independently selected from 0, 1, 2 and n+m≥1;
wherein at least one of R1 and R2 is connected to the ring Y, respectively the ring Z, by a spacer unit, wherein the spacer unit is selected from the group consisting of phenylene, biphenylene, naphthylene, anthracenylene, pyridinylene, diazinylene, dibenzofuranylene, and triazinylene, wherein the respective group may be substituted or unsubstituted;
wherein in case that the spacer unit is substituted the one or more substituent(s) are independently selected from the group consisting of deuterium, C6 to C14 aryl, C2 to C20 heteroaryl, CN-substituted C6 to C14 aryl, CN, P(═O)R′R″, wherein R′ and R″ may be the same or different and are independently selected from C1 to C10 alkyl or C6 to C12 aryl;
provided that if the spacer unit is phenylene or phenyl-substituted phenylene the group R1, respectively R2, connected via this spacer unit to the ring Y, respectively Z, is not phenyl;
provided that if the spacer unit is pyridinylene, diazinylene, dibenzofuranylene, or triazinylene, then at least one of a substituent on the spacer unit and the group R1, respectively R2, connected to the spacer unit is a heteroaryl.
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