6-diisopropylphenyl)acenaphthoimidazol-2-ylidene (AnIPr) with an achiral 2-naphthyl-4,4-dimethyloxazoline palladacyclic fragment. Applying this precatalyst enabled a general protocol for Pd-catalyzedC–Ncross-couplingreactions of challenging five- or six-membered ring heteroaryl chlorides and various heterocyclic amines. The desired aminated products, including commercial pharmaceuticals or key intermediates such
Copper-catalyzed oxidative C‒H, N‒H coupling of azoles and thiophenes
作者:Shinobu Mitsuda、Taiki Fujiwara、Katsuyoshi Kimigafukuro、Daiki Monguchi、Atsunori Mori
DOI:10.1016/j.tet.2012.03.001
日期:2012.5
C-H, N-H coupling of azole and thiophene derivatives takes place in the presence of a catalytic amount of Cu(OAc)(2) and an additive. The reaction of azoles smoothly occurs with several amines and amides catalyzed by 20 mol % of Cu(OAc)(2)-2PPh(3) and 4 equiv of NaOAc under O-2 or in the presence of Ag2CO3 under N-2. The coupling reaction leads to a facile synthesis of a N-substituted analogue of 2,5-diarylthiazole, which shows photoluminescent properties with extended pi-conjugation. Spectroscopic characteristics of the obtained thiazole derivatives are discussed by measurements of UV-vis absorption and photoluminescent spectra. Under the reaction conditions using Ag2CO3 as an additive and Cu(OAc)2-2PPh3 as a catalyst, thiophene derivatives also react with 2-pyrrolidone to undergo C-H, N-H amidation. (C) 2012 Elsevier Ltd. All rights reserved.
CuCl-Catalyzed Ullmann-Type C–N Cross-Coupling Reaction of Carbazoles and 2-Bromopyridine Derivatives
作者:Xiangdong Zhao、Yuanbin She、Kun Fang、Guijie Li
DOI:10.1021/acs.joc.6b02595
日期:2017.1.20
A CuCl-catalyzed Ullmann-type C-N cross coupling reaction of carbazoles and 2-bromopyridine deriva tives has been developed for the synthesis of N-heteroarylcarbazole derivatives employing 1-methyl-imidazole and t-BuOLi as ligand and base, respectively, both of which are found to significantly promote the reaction. Low cost and low loading of both catalyst and ligand, together with high reaction yields, render this practical reaction to be suitable for large-scale preparations and could be useful in material science.
FLUORANTHENE DERIVATIVE, LIGHT-EMITTING DEVICE MATERIAL CONTAINING SAME, AND LIGHT-EMITTING DEVICE
申请人:TORAY INDUSTRIES, INC.
公开号:US20150280139A1
公开(公告)日:2015-10-01
The purpose of the present invention is to provide an organic thin-film luminescent element which exhibits improved luminous efficiency, drive voltage and durability life. This fluoranthene derivative is characterized by having a specific structure that contains a fluoranthene skeleton.