Cu(OAc)2·H2O-catalyzed N-arylation of nitrogen-containing heterocycles
作者:Zhong-Lin Xu、Hong-Xi Li、Zhi-Gang Ren、Wei-Yuan Du、Wei-Chang Xu、Jian-Ping Lang
DOI:10.1016/j.tet.2011.05.025
日期:2011.7
In the absence of any additional ligands, the efficientN-arylation of nitrogen-containing heterocycles with aryl iodides catalyzed by relative low catalyst amount of Cu(OAc)2·H2O was developed. This simple catalytic system is involved in the C–N cross-coupling reaction and works for a variety of pyrazole, pyrrole, imidazole, triazole, indole, benzoimidazole, benzotriazole, carbazole, and anilines
Site-selective arene C-H amination via photoredox catalysis
作者:Nathan A. Romero、Kaila A. Margrey、Nicholas E. Tay、David A. Nicewicz
DOI:10.1126/science.aac9895
日期:2015.9.18
cross-coupling chemistry has developed into one of the most reliable approaches to assemble complex aromatic compounds from preoxidized starting materials. More recently, transitionmetal–catalyzed carbon-hydrogen activation has circumvented the need for preoxidized starting materials, but this approach is limited by a lack of practical aminationprotocols. Here, we present a blueprint for aromatic carbon-hydrogen
为芳基 CN 键合开辟道路 药物化学家喜欢将 N 键添加到芳环的 C 原子上以制造生物活性化合物。通过利用可见光中的能量,Romero 等人。建立这些联系并将 CH 转化为 CN 键。他们使用一种吸收蓝色的吖啶离子来激活一个环 C 以供传入的 N 伙伴使用。然后,硝酰基自由基助催化剂 (TEMPO) 对 H 原子向 O 的转移进行了编排。该反应适用于广泛的底物,包括作为 N 源的铵。科学,这个问题 p。1326 两种催化剂利用可见光和氧气形成药物研究中感兴趣的碳氮键基序。在过去的几十年里,有机金属交叉偶联化学已发展成为从预氧化起始材料组装复杂芳香族化合物的最可靠方法之一。最近,过渡金属催化的碳氢活化避免了对预氧化起始材料的需求,但这种方法因缺乏实用的胺化方案而受到限制。在这里,我们提出了通过光氧化还原催化进行芳香碳氢功能化的蓝图,并描述了该策略在芳烃胺化中的应用。一种基于有机光氧化还原的催
Phosphorescent Platinum(II) Complexes Based on C<sup>∧</sup>C* Cyclometalating Aryltriazol-5-ylidenes
solid-state structures of seven complexes could be obtained by single-crystal X-ray diffraction. According to absorption and emission spectra, the complexes reveal interesting photophysical properties with strong emissions in the blue region of the visible spectrum at room temperature, which are sensitive to the donor and acceptor properties of the substituents at the cyclometalating ligand.
两个系列的杂铂(II)卡宾的类型的compexes [PT(C ∧ C *)(O ∧ O)](O ∧ O =乙酰丙酮)以C ∧ C *环金属化4-苯基-1,2,4-制备了三唑-5-亚烷基以及1-苯基-1,2,4-三唑-5-亚烷基配体。各种取代基在苯环的4位上的作用(4-苯基三唑:H,Cl,OCH 3,NO 2; 1-苯基三唑:H,Cl,OCH 3,CH 3)进行了研究。通过将相应的芳基1,2,4-三唑与碘甲烷季铵化获得配体前体。通过三唑鎓前体经由银(I)碳烯,二氯(1,5-环辛二烯)铂(II)的金属转移,环金属化反应以及最后添加乙酰丙酮化物的反应顺序来合成配合物。所有配合物均已通过标准技术进行了表征,例如1 H NMR,1313 C NMR和元素分析。另外,可以通过单晶X射线衍射获得七个配合物的固态结构。根据吸收和发射光谱,该络合物在室温下在可见光谱的蓝色区域中显示出有趣的光物理性质和强发
[EN] PHOTOREDOX-CATALYZED DIRECT C-H FUNCTIONALIZATION OF ARENES<br/>[FR] FONCTIONNALISATION DIRECTE DE LA LIAISON C-H D'ARÈNES CATALYSÉE PAR UNE RÉACTION PHOTORÉDOX
申请人:UNIV NORTH CAROLINA CHAPEL HILL
公开号:WO2016196816A1
公开(公告)日:2016-12-08
The invention generally relates to methods of making substituted arenes via direct C-H amination. More specifically, methods of making para- and ortho-substituted arenes via direct C-H amination are disclosed. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
Photoredox-catalyzed direct C—H functionalization of arenes
申请人:THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL
公开号:US10399947B2
公开(公告)日:2019-09-03
The invention generally relates to methods of making substituted arenes via direct C—H amination. More specifically, methods of making para- and ortho-substituted arenes via direct C—H amination are disclosed. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.