On January 22, 2019, Xing, Qifeng; Li, Zhiyang; Liu, Shuyao; Ren, Xueyan published a patent.HPLC of Formula: 160377-42-4 The title of the patent was Preparation of pyrazoloindazole derivatives and their application in OLED. And the patent contained the following:
The invention relates to pyrazoloindazole derivative of formula I [wherein Ar1 = H, (un)substituted C6-30 aryl or fused aryl, and (un)substituted C3-30 heteroaryl or fused heteroaryl; Ar2 = (un)substituted C6-30 aryl or fused aryl, and (un)substituted C3-30 heteroaryl or fused heteroaryl], method for their preparation and their application in OLED. The inventive compound can be applied in OLED to effectively reduce the work voltage and improve the light-emitting efficiency of the OLED. The experimental process involved the reaction of 5-(4-Bromophenyl)pyrimidine(cas: 160377-42-4).HPLC of Formula: 160377-42-4
The Article related to pyrazoloindazole derivative preparation oled, Heterocyclic Compounds (More Than One Hetero Atom): Pyrazoles and other aspects.HPLC of Formula: 160377-42-4
Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia