fh fh DIBENZOfhQUINOXALINE DERIVATIVE METHOD OF SYNTHESIZING THE SAME LIGHT-EMITTING ELEMENT LIGHT-EMITTING DEVICE ELECTRONIC APPLIANCE AND LIGHTING DEVICE

摘要

The present invention provides a novel synthesis method for synthesizing a dibenzo[f,h]quinoxaline derivative with reduced impurities and a dibenzo[f,h]quinoxaline derivative with reduced impurities. Furthermore, there is provided a light-emitting element, light-emitting device, electronic device, or lighting device having high luminous efficiency and high reliability, using the dibenzo[f,h]quinoxaline derivative as an EL material. By passing the 2-(chloroaryl)dibenzo[f,h]quinoxaline derivative as a synthetic intermediate, the impurities contained in the final product can be easily removed by sublimation purification, so that the impurities can be reduced. It is a dibenzo[f,h]quinoxaline derivative with reduced impurities and a method for synthesizing a benzo[f,h]quinoxaline derivative.