Preparation of carbazole derivatives for organic electronic device.

Abstract

Title compds. I [R1-R10 = independently H, halo, aryl, etc.; X, Y = independently S, O or Si(R11)(R12); R11, R12 = independently H, aryl, alkyl, etc.; m, n = 0 or 1 such as m+n≥1; L = single bond, arylene, fluorenylene, etc.; Ar1 = heterocyclyl (contg. at least one heteroatom selected from O, N, S, etc.), aryl, fluorenyl, etc.] were prepd. For example, a mixt. of II [R = H] (7.18 g), 2-(4-bromophenyl)-4,6-diphenylpyrimidine (8.35 g), Pd2(dba)3 (0.49 g), 50% P(Bu-t)3 (0.7 mL), and NaOBu-t (5.18 g) in toluene was stirred at 100° to give, after work-up, compd. II [R = 4-(4,6-diphenylpyrimidin-2-yl)phenyl] (73% yield). The electronic device comprising the invention compd. (host material) showed improvements in efficiency and lifetime compared with the device using CBP. [on SciFinder(R)]