Metal-free oxidative decarbonylative halogenation of fused imidazoles
作者:Davinder Singh、Javeed Ahmad Tali、Gulshan Kumar、Ravi Shankar
DOI:10.1039/d1nj04440k
日期:——
An efficient strategy has been developed for the deformylative halogenation of carbaldehyde imidazo-fused heterocycles in the presence of TBHP controlled by temperature.
[EN] MATERIALS FOR ORGANIC ELECTROLUMINESCENT DEVICES<br/>[FR] MATÉRIAUX POUR DISPOSITIFS ÉLECTROLUMINESCENTS ORGANIQUES
申请人:MERCK PATENT GMBH
公开号:WO2019068679A1
公开(公告)日:2019-04-11
The present invention relates to compounds of the formula (1 ) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to electronic devices which comprise these compounds.
A CuX-mediated regioselective halogenation reaction of 2-phenylimidazo[1,2-a]pyridine in the presence of oxygen is introduced in this paper. This reaction provides an effective method for the production of C-3 halogenated 2-phenylimidazo[1,2-a]pyridines with a yield of up to 96%. A plausible mechanism for the formation of title compounds via 2-phenylimidazo[1,2-a]pyridine–CuX complex intermediate is
本文介绍了CuX介导的2-苯基咪唑并[1,2- a ]吡啶在氧气存在下的区域选择性卤化反应。该反应为生产C-3卤代2-苯基咪唑并[1,2- a ]吡啶提供了一种有效的方法,收率高达96%。提出了一种通过 2-苯基咪唑并[1,2- a ]吡啶-CuX 络合物中间体形成标题化合物的合理机制。代表性化合物的结构是通过单晶XRD方法建立的。通过 Hirshfeld 表面分析和 DFT 计算证实的电子结构合理化了相关吸收和发射的特征以及大的斯托克斯位移。
MATERIALS FOR ORGANIC ELECTROLUMINESCENT DEVICES
申请人:Merck Patent GmbH
公开号:US20200295270A1
公开(公告)日:2020-09-17
The present invention relates to compounds of the formula (1) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to electronic devices which comprise these compounds.
Generation of Dimethyl Sulfoxide Coordinated Thermally Stable Halogen Cation Pools for C−H Halogenation
作者:Pallaba Ganjan Dalai、Kuntal Palit、Niranjan Panda
DOI:10.1002/adsc.202101291
日期:2022.3
A method to generate halogen cation pools from the reaction of 1,2-dihaloethanes (hal=Br, I) and dimethyl sulfoxide (DMSO) for C−H halogenation of arenes and heteroarenes was reported. The initial reaction of DMSO and 1,2-dihaloethane generates the sulfur ylide, which undergoes pyrolytic elimination of ethylene by affording halonium ions. These ions were accumulated and stabilized by DMSO through coordination