New material for transporting electrons and organic electroluminescent display using the same

A compound represented by chemical formula 2:

• 18
• wherein
• R1 and R2 are independently or simultaneously a hydrogen atom, a C1-20 aliphatic hydrocarbon, benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or aromatic ring, and R1 and R2 cannot simultaneously be hydrogen atoms;
• Ar is benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or an aromatic ring;
• and
• R4 is a hydrogen atom, a C1-12 alkyl or aliphatic hydrocarbon, benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or aromatic ring.

A compound represented by chemical formula 3:

• 19
• wherein
• R1 and R2 are independently or simultaneously a hydrogen atom, a C1-20 aliphatic hydrocarbon, benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or aromatic ring, and R1 and R2 cannot simultaneously be hydrogen atoms;
• R3 is a hydrogen atom, a C1-20 alkyl group or an aliphatic hydrocarbon, a substituted or unsubstituted benzene, naphthalene, biphenyl, anthracene, or an aromatic heterocycle or aromatic ring;
• and
• R4 is a hydrogen atom, a C1-12 alkyl or aliphatic hydrocarbon, benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or aromatic ring

A compound represented by chemical formula 4:

• 20
• wherein
• R1 and R2 are independently or simultaneously a hydrogen atom, a C1-20 aliphatic hydrocarbon, benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or aromatic ring, and R1 and R2 cannot simultaneously be hydrogen atoms;
• and
• R4 is a hydrogen atom, a C1-12 alkyl or aliphatic hydrocarbon, benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or aromatic ring.

A compound represented by chemical formula 5:

• 21
• wherein
• R1 and R2 are independently or simultaneously a hydrogen atom, a C1-20 aliphatic hydrocarbon, benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or aromatic ring, and R1 and R2 cannot simultaneously be hydrogen atoms;
• Ar is benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or an aromatic ring;
• and
• R4 is a hydrogen atom, a C1-12 alkyl or aliphatic hydrocarbon, benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or aromatic ring.

An organic electroluminescent display, which comprises:

• At least one organic layer containing at least one compound selected from the group consisting of a compound represented by chemical formula 1, a compound represented by chemical formula 2, a compound represented by chemical formula 3, a compound represented by chemical formula 4, and a compound represented by chemical formula 5:
• 22
• wherein in the above chemical formulas 1, 2, 3, 4, and 5,
• R1 and R2 are independently or simultaneously a hydrogen atom, a C1-20 aliphatic hydrocarbon, benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or aromatic ring, and R1 and R2 cannot simultaneously be hydrogen atoms;
• Ar is benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or an aromatic ring;
• R3 is a hydrogen atom, a C1-20 alkyl group or an aliphatic hydrocarbon, a substituted or unsubstituted benzene, naphthalene, biphenyl, anthracene, or an aromatic heterocycle or aromatic ring;
• and
• R4 is a hydrogen atom, a C1-12 alkyl or aliphatic hydrocarbon, benzene, naphthalene, biphenyl, anthracene, or a group derived from an aromatic heterocycle or aromatic ring.