On March 1, 2022, Ma, Tiantian; Zheng, Yiyi; Xu, Jiacong published a patent.Category: benzoxazole The title of the patent was Preparation of heterocyclic nitrogen compounds for organic electroluminescent device. And the patent contained the following:
The present invention relates to the preparation of heterocyclic nitrogen compounds for organic electroluminescent device. In particular, the preparation of compound I (wherein, * represents a connection site, ring A, B and C = C6-14 aryl and are not benzene rings at the same time; in formula II * is the bond which represents fusion on any two adjacent carbon atoms of ring B in I; U1, U2 = (un)substituted [C6-30 aryl, C3-30 heteroaryl] or a structure shown in formula III or IV, and at least one of U1 and U2 is selected from formula III or IV; X = S or O; X1, X2 and X3 = N or C(R), and at least one of X1, X2 and X3 is N; E1 = (R1)n1; E2 = (R2)n2; E3 = (R3)n3; E4 = (R4)n4; E5 = (R5)n5; R1-5 = hydrogen, deuterium, halogen, cyano, C6-12 aryl, C5-12 heteroaryl, C1-5 alkyl, C1-5 haloalkyl, C1-5 deuterated alkyl, C3-12 trialkylsilyl). Further, (n1, n2 represents the number of substituents R1 and R2 resp.; n1, n2 = 1-8, when n1 or n2 is greater than 1, any two R’s are the same or different, optionally, any two adjacent R’s form a ring; n3 represents the number of substituent R3, n3 = 1-6, when n3 is greater than 1, any two R3 are the same or different, optionally, any two adjacent R3 form a ring; n4 represents the number of substituent R4, n4 = 1-3, when n4 is greater than 1, any two R4 are the same or different, any optionally, any two adjacent R4 form a ring). Also, (n5 represents the number of substituent R5, n5 = 1-4, when n5 is greater than 1, any two R5 is the same or different, optionally, any two adjacent R5 form a ring; L, L1-4 = a single bond, (un)substituted [C6-30 arylene, C3-30 heteroarylene]; Ar1 and Ar2 = (un)substituted [C6-30 aryl, C3-30 heteroaryl]; the substituents in the U1, U2, L, L1-4, Ar1 and Ar2 = deuterium, halogen, cyano, C3-20 heteroaryl, C6-20 aryl, C3-12 trialkylsilyl, C1-10 alkyl, C1-10 haloalkyl, C1-10 deuterated alkyl, C3-10 cycloalkyl, C2-10 heterocycloalkyl or C1-10 alkoxy; optionally, in Ar1 and Ar2, any two adjacent substituents form a ring). The inventive compound having a fused heteroaromatic ring as a hole transporting group and a nitrogen-containing heteroaryl group as an electron transporting group is suitable for use in an organic electroluminescent device, and the performance of the organic electroluminescent device can be significantly improved. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).Category: benzoxazole
The Article related to heterocyclic nitrogen compound preparation hole transport material oled, Heterocyclic Compounds (More Than One Hetero Atom): Triazines and other aspects.Category: benzoxazole
Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem