Effects of solvent and base on the palladium-catalyzed amination: PdCl2(Ph3P)2/Ph3P-catalyzed selective arylation of primary anilines with aryl bromides
摘要:
A readily accessible catalytic system, PdCl2(Ph3P)(2)/Ph3P, was developed for the selective arylation of primary anilines with aryl bromides. The strong influence of solvents and bases on the catalytic activity was observed. In refluxing o-xylene, triphenylphosphine shows high efficiency for Pd-catalyzed intermolecular amination reactions. By changing the bases, mono- and diarylation of primary amines could be selectively achieved in high yields. Moreover, the catalytic system showed good toleration for the steric hindrance of anilines. A series of N,N,N',N'-tetraaryl-1,1'-biphenyl-4,4'-diamines, important intermediates of OLED hole transport materials, were synthesized facilely via coupling reactions between 4,4'-diaminobiphenyls and aryl bromides. (C) 2014 Elsevier Ltd. All rights reserved.
N-alkylation andN-arylation of anilines starting from a mild N?Mg reagent: Its activation causing the ?N?C? coupling to extend the unified structure-reactivity relationship
New N-alkylation and N-arylation procedures starting from anilinomagnesium (ArNHMgBr) are reported. For N-alkylation with alkyl bromides, addition of hexamethylphosphoramide to an ArNHMgBr solution in tetrahydrofuran (THF) is effective. After heating at 55°C, N-monoalkylation product was obtained in 60–90% yield, slight dialkylation taking place. The combined use of aryliminodimagnesium [ArN(MgBr)2]
Spirobifluorene derivative-based materials for electronic devices
申请人:Merck Patent GmbH
公开号:US10032989B2
公开(公告)日:2018-07-24
The present application relates to spirobifluorene derivatives of a formula (I), to the use thereof in electronic devices, and to processes for preparing said derivatives.
本申请涉及式 (I) 的螺二芴衍生物、其在电子设备中的用途以及制备上述衍生物的工艺。
SPIROBIFLUORENE DERIVATIVE-BASED MATERIALS FOR ELECTRONIC DEVICES
申请人:Merck Patent GmbH
公开号:US20180026188A1
公开(公告)日:2018-01-25
The present application relates to spirobifluorene derivatives of a formula (I), to the use thereof in electronic devices, and to processes for preparing said derivatives.
[DE] MATERIALIEN AUF BASIS VON SPIROBIFLUORENDERIVATEN FÜR ELEKTRONISCHE VORRICHTUNGEN<br/>[EN] SPIROBIFLUORENE DERIVATIVE-BASED MATERIALS FOR ELECTRONIC DEVICES<br/>[FR] MATÉRIAUX À BASE DE DÉRIVÉS DE SPIROBIFLUORÈNE POUR DISPOSITIFS ÉLECTRONIQUES
申请人:MERCK PATENT GMBH
公开号:WO2016131521A1
公开(公告)日:2016-08-25
Die vorliegende Anmeldung betrifft Spirobifluoren-Derivate einer Formel (I), ihre Verwendung in elektronischen Vorrichtungen, sowie Verfahren zur Herstellung der genannten Derivate.
Effects of solvent and base on the palladium-catalyzed amination: PdCl2(Ph3P)2/Ph3P-catalyzed selective arylation of primary anilines with aryl bromides
A readily accessible catalytic system, PdCl2(Ph3P)(2)/Ph3P, was developed for the selective arylation of primary anilines with aryl bromides. The strong influence of solvents and bases on the catalytic activity was observed. In refluxing o-xylene, triphenylphosphine shows high efficiency for Pd-catalyzed intermolecular amination reactions. By changing the bases, mono- and diarylation of primary amines could be selectively achieved in high yields. Moreover, the catalytic system showed good toleration for the steric hindrance of anilines. A series of N,N,N',N'-tetraaryl-1,1'-biphenyl-4,4'-diamines, important intermediates of OLED hole transport materials, were synthesized facilely via coupling reactions between 4,4'-diaminobiphenyls and aryl bromides. (C) 2014 Elsevier Ltd. All rights reserved.