On September 15, 2017, Huang, Jinhai; Su, Jianhua published a patent.Formula: C13H8BrNO The title of the patent was Preparation of spiroazole compounds as organic electroluminescent materials. And the patent contained the following:
The present invention provides a spiroazole organic electroluminescent compounds as shown in formula I [wherein X1 and X2 are -N=, -NR, -O-, -S-; Y1 and Y2 are -N=, -NR11, -O-, -S-, and X1 and Y1, X2 and Y2 are not simultaneously -N=; R are independently selected from H, C1-C12 alkyl, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C3-C30 heteroaryl, substituted or unsubstituted fiver- or six-membered heterocycloalkyl, substituted or unsubstituted C12-C30 diaryl amino, substituted or unsubstituted C18-C30 triarylamino, carbazolyl]. For example, compound II was prepared in a multi-step synthesis. This title compounds have good thermostability, high luminous efficiency, high luminous purity, can be used for fabricating organic electroluminescent device, used in organic solar cell, organic thin-film transistor or organic photoreceptor. (characterization data given). The organic electroluminescent device contains an anode, a cathode and an organic layer; and the organic layer contains at least one of light-emitting layer, a hole injection layer, a hole transport layer, a hole blocking layer, electron injection layer, electron transporting layer. The organic electroluminescent device has good elec. electroluminescent efficiency, excellent purity of color and long service life. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).Formula: C13H8BrNO
The Article related to preparation spiroazole compound organic electroluminescent materials, Heterocyclic Compounds (More Than One Hetero Atom): Oxazoles, Isoxazoles and other aspects.Formula: C13H8BrNO
Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem