On November 23, 2021, Gao, Chunji; Zhao, Xiaoyu published a patent.Safety of 7-Bromo-2-phenylbenzo[d]oxazole The title of the patent was Preparation of heterocyclic compound as light emitting host material layer for organic electroluminescent device. And the patent contained the following:
The invention relates to preparation of heterocyclic compound as light emitting host material layer for organic electroluminescent device. In particular, the heterocyclic compound as light emitting host material layer I or II (wherein, Ar1 – Ar4 = (un)substituted C6-C30 aryl or (un)substituted C3-C30 heteroaryl groups; X1 – X4 = C or N; Y1 and Y2 = NR1 or O; R1 = (un)substituted C1-C20 alkyl, (un)substituted C6-30 aryl or (un)substituted C3-C30 heteroaryl group; L1 and L2 = single bond, (un)substituted C6-C30 arylene, or (un)substituted C3-C30 heteroarylene group). Further, (R2 – R9 = H, D, halogen, cyano, carboxy, nitro, hydroxyl, (un)substituted C1-C20 alkyl, (un)substituted C3-C30 cycloalkyl, (un)substituted C3-C30 cycloalkenyl group, (un)substituted C3-C7 heterocycloalkyl, (un)substituted C6-C30 aryl, (un)substituted C3-C30 heteroaryl; or adjacent ones of R2 to R9 may be connected to each other to form one or more rings, the premise is that at least one pair of R2 and R3, R3 and R4, R4 and R5, R5 and R6, R6 and R7, R7 and R8, and R8 and R9 may be connected to each other to form one or more rings, wherein the ring has 1 to 5 single rings) was prepared The organic electroluminescent device of the present invention has excellent luminous efficiency and lifetime. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).Safety of 7-Bromo-2-phenylbenzo[d]oxazole
The Article related to oxazolophenanthridine derivative preparation light emitting host material oled, imidazophenanthridine derivative preparation light emitting host material oled, carbazole derivative preparation light emitting host material oled and other aspects.Safety of 7-Bromo-2-phenylbenzo[d]oxazole
Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem