Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device

A compound of formula if formula (1):

• wherein
• R1 to R8 each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms,
• provided that one selected from R1 to R4 is a single bond bonding to *a,
• adjacent two selected from R1 to R4 that are not a single bond and R5 to R8 do not bond to each other and therefore do not form a cyclic structure,
• L2 represents a single bond, a group of formula (10), or a group of formula (11);
• wherein
• R21 to R26 and R31 to R38 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms,
• provided that:
• one selected from R21 to R26 is a single bond bonding to one selected from R1 to R4 via *a, the other one selected from R21 to R26 is a single bond bonding to the benzene ring A,
• one selected from R31 to R38 is a single bond bonding to one selected from R1 to R4 via *a, the other one selected from R31 to R38 is a single bond bonding to the benzene ring A,
• adjacent two selected from R21 to R26 that are not a single bond do not bond to each other, and therefore do not form a cyclic structure,
• adjacent two selected from R31 to R38 that are not a single bond do not bond to each other, and therefore do not form a cyclic structure,
• R41 to R44 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms,
• a pair of adjacent two selected from R41 and R42, and R42 and R43 may bond to each other to form a substituted or unsubstituted benzene ring, or may not bond to each other and therefore may not form a benzene ring;
• R51 to R55 and R61 to R68 each independently represent a hydrogen atom, or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms,
• provided that one selected from R51 to R55 is a single bond bonding to *b, one selected from R61 and R64 is a single bond bonding to *c,
• adjacent two selected from R51 to R55 that are not a single bond do not bond to each other and therefore do not form a cyclic structure,
• adjacent two selected from R61 to R68 that are not a single bond do not bond to each other and therefore do not form a cyclic structure:
• L1 represents a single bond, or a substituted or unsubstituted phenylene group;
• Ar represents a group selected from the formulae (20) to (22):
• wherein
• R71 to R75, R81 to R86, and R91 to R95 each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms,
• provided that:
• one selected from R71 to R75 is a single bond bonding to *d,
• one selected from R81 to R86 is a single bond bonding to *e, the other one selected from R81 to R86 is a single bond bonding to *f,
• ** represents a bonding position to L1,
• m is 0,
• n is 0,
• *f bonds to L1,
• adjacent two selected from R71 to R75 that are not a single bond, adjacent two selected from R81 to R86 that are not a single bond, and adjacent two selected from R91 to R95 each independently may bond to each other to form a substituted or unsubstituted cyclic structure or may not bond to each other and therefore may not form a cyclic structure;
• the benzene ring B and the benzene ring C, the benzene ring B and the benzene ring D, and the benzene ring C and the benzene ring D do not crosslink;
• wherein
• R71 to R75, R81 to R86, *d, *e, *f, **, m, and n are as defined in the formula (20),
• R111 to R118 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms;
• provided that:
• one selected from R111 to R114 is a single bond bonding to *h;
• adjacent two selected from R111 to R114 that are not a single bond and R115 to R118 each independently may bond to each other to form a substituted or unsubstituted cyclic structure, or may not bond to each other and therefore may not form a cyclic structure;
• the benzene ring B and the benzene ring C do not crosslink;
• wherein
• R121 to R128 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms;
• provided that one selected from R121 to R124 is a single bond bonding to *i;
• X represents CRaRb or an oxygen atom;
• one of Ra and Rb is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, the other is a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or Ra and Rb each are independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, and the two aryl groups may bond to each other via a single bond;
• ** represents a bonding position to L1, and
• adjacent two selected from R121 to R124 that are not a single bond and R125 to R128 each independently may bond to each other to form a substituted or unsubstituted cyclic structure, or may not bond to each other and therefore may not form a cyclic structure.