Palladium-catalyzed double N-arylation to synthesize multisubstituted dibenzoazepine derivatives
摘要:
Palladium-catalyzed double N-arylation of primary amines with (Z)-1,2-bis(2-bromophenyl)ethenes was investigated. A variety of dibenzoazepine derivatives were synthesized in good to excellent yields. (C) 2012 Elsevier Ltd. All rights reserved.
semi‐empirical rules exist to compensate for this shortcoming, among which the Bell–Evans–Polanyi (B‐E‐P) principle is an example for reactions involving bond breakage and reformation. We expand the B‐E‐P principle to a new territory by probing photoinduced structure planarization (PISP) of a series of dibenz[b,f]azepine derivatives incorporating bent‐to‐planar and rotation motion. The latter involves twisting
寻找动力学和热力学之间的关系可能很困难。但是,存在半经验规则来弥补这一缺点,其中Bell-Evans-Polanyi(B-E-P)原理是涉及键断裂和重整反应的一个示例。通过探测一系列结合了平面弯曲和旋转运动的dibenz [ b,f ] azePIne衍生物的光致结构平面化(PISP),我们将B‐E‐P原理扩展到新的领域。后者涉及部分双键特性的扭曲,从而诱导了一个依赖于对N-苯基位置的取代基屏障。过渡态结构和频率数据满足并拓宽了B‐ EP ‐P原理适用于PISP反应,无需键重排。加上PISP期间的双重发射,这使得可以利用动力学/热力学关系,从而利用比例发光特性进行激发态结构转换。
Nickel-Catalyzed <i>N</i>-Arylation of Diarylamines for Triarylamine Synthesis
作者:Kunjun Hu、Yunlong Gao、Jian Jin
DOI:10.1021/acs.organomet.2c00025
日期:2022.3.14
A practical nickel-catalyzed C–N cross-coupling reaction between diarylamines and aryl halides has been developed using commercially available NiCl2(dppf) as the catalyst. This robust method can be efficiently applied to a variety of diarylamines which are privileged motifs in materials science, including phenoxazines, phenothiazines, carbazoles, diphenylamines, 9-10-dihydroacridines, 10,11-dihydro-5H-dibenzo[b
已经使用市售的 NiCl 2 (dppf) 作为催化剂,开发了一种实用的镍催化二芳基胺和芳基卤化物之间的 C-N 交叉偶联反应。这种稳健的方法可以有效地应用于各种二芳基胺,它们是材料科学中的特权基序,包括吩恶嗪、吩噻嗪、咔唑、二苯胺、9-10-二氢吖啶、10,11-二氢-5 H-二苯并[ b , f ]氮杂类、5 H-二苯并[ b , f ]氮杂类和 9 H-三苯并[ b , d , f ]氮杂类。
Composition of matter for use in organic light-emitting diodes
申请人:Kyulux, Inc.
公开号:US10547014B2
公开(公告)日:2020-01-28
The present disclosure relates to compounds of Formula (I)
as compounds capable of emitting delayed fluorescence, and uses of the compounds in organic light-emitting diodes.
The present invention relates to a light emitting element comprising at least a light emitting layer containing a light emitting material and a host material and having a light emission maximum wavelength of 500 nm or less wherein the minimum excitation triplet energy level of the host material is higher than the minimum excitation triplet energy level of the light emitting material.