catalytic reactions using transition metals is an important challenge in organic chemistry in which the intermediates are related to those produced in the classical cross-couplingreactions. As part of our research program devoted to the development of metal-catalyzed reactions using indium organometallics, a protocol for the C⁻H activation and C⁻C coupling of 2-arylpyridines with triorganoindium reagents
Directing Group‐Promoted Inert C−O Bond Activation Using Versatile Boronic Acid as a Coupling Agent
作者:Ram Ambre、Ting‐Hsuan Wang、Anmei Xian、Yu‐Shiuan Chen、Yu‐Fu Liang、Titel Jurca、Lili Zhao、Tiow‐Gan Ong
DOI:10.1002/chem.202004132
日期:2020.12.18
strategy facilitates the efficient catalytic cross‐coupling of methoxyarenes with a variety of organoboronreagents. Directing groups facilitate the activation of inert C−O bonds in under‐utilized aryl methyl ethers enabling their adaptation for C−C cross‐coupling reactions as less toxic surrogates to the ubiquitous haloarenes. The method reported enables C−C cross‐coupling with readily available and economical
Cobalt(II)-Catalyzed Oxidative C–H Arylation of Indoles and Boronic Acids
作者:Xinju Zhu、Jian-Hang Su、Cong Du、Zheng-Long Wang、Chang-Jiu Ren、Jun-Long Niu、Mao-Ping Song
DOI:10.1021/acs.orglett.6b03746
日期:2017.2.3
Co(II)-catalyzed C–H C2 selective arylation of indoles with boronic acids through monodentate chelation assistance has been achieved for the first time. The unique features of this methodology include mild reaction conditions, highly C2 regioselectivity, and employment of a Grignard reagent-free catalytic system. A wide range of substrates, including unreactive arenes, are well tolerated, which enables
Hypercrosslinked Polymer Platform-Anchored Single-Site Heterogeneous Pd–NHC Catalysts for Diverse C–H Functionalization
作者:Tanmoy Mandal、Moumita Mondal、Joyanta Choudhury
DOI:10.1021/acs.organomet.1c00182
日期:2021.8.9
new class of hypercrosslinked polymer (HCP) platform-anchored single-site heterogenized Pd–NHC catalysts for multipurpose C–H functionalization reactions. This new class is represented by a set of three catalysts, viz., HCP-B-MeNHC-Pd, HCP-B-BnNHC-Pd, and HCP-TPM-MeNHC-Pd, having a variation on the structural feature of the anchoring polymeric platform. All three catalysts were fully characterized via
我们展示了一类新的超交联聚合物(HCP)平台锚定的单点异质化 Pd-NHC 催化剂,用于多用途 C-H 功能化反应。这一新类别由一组三种催化剂代表,即HCP-B- Me NHC-Pd、HCP-B- Bn NHC-Pd和HCP-TPM- Me NHC-Pd,在结构特征上有变化锚定聚合物平台。所有三种催化剂都通过各种固态表征和分析技术(如 X 射线光电子能谱、13C 交叉极化魔角自旋核磁共振、场发射扫描电子显微镜、能量色散 X 射线分析、热重分析和电感耦合等离子体-光发射光谱法。三种经常使用且非常有用的 C-H 官能化反应,即 C-H 卤化、乙酰氧基化和芳基化,用新催化剂进行了测试,发现它们具有高度的相容性和成功性。使用HCP-TPM- Me NHC-Pd在催化剂的作用下,卤化、乙酰氧基化和芳基化反应的官能化产物的产率分别高达 85%、75% 和 70%。这种新系统提供了诸如增强的活性、异质性和可回收性等苛刻的特性,使其成为非均相
ORGANIC COMPOUND AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME
申请人:YEN Feng-Wen
公开号:US20200235315A1
公开(公告)日:2020-07-23
The present invention discloses an organic compound and an organic electroluminescence device using the organic compound as a host material, a fluorescent guest material, an electron transporting or a hole blocking material in the light emitting layer of the organic electroluminescence device. The organic compound may be for lowering a driving voltage, power consumption or increasing a current efficiency or half-life of the organic electroluminescence device.
The same definition as described in the present invention.