Method of making organic electroluminescent materials

摘要

A method of making ligands for producing novel heteroleptic iridium complexes is provided. The method includes reacting the condensation product of an aryl 1,2-diamine and an aryl aldehyde with manganese dioxide in a solvent. The novel iridium complexes produced using the ligands are useful compounds in OLED devices.

主权项

1. A method of making a compound of formula: comprising reacting an aryl 1,2-diamine and an aryl aldehyde with manganese dioxide and a phase transfer catalyst, comprising 1-hexadecylpyridinium bromide, in a solvent; wherein the aryl 1,2-diamine has a structure of formula IV:and the aryl aldehyde has a structure of formula V: wherein R1 and R2 may represent mono-, di-, tri- or tetra-substitution; wherein R1 and R2 and are each independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, phosphino, and combinations thereof; wherein R1 and R2 are optionally fused and may be further substituted; and wherein R5 is substituted aryl.