Benzotriazol-1-ylmethanol: An excellent bidentate ligand for the copper/palladium-catalyzed C-N and C-C coupling reaction
作者:Rajeev R. Jha、Jaspal Singh、Rakesh K. Tiwari、Akhilesh K. Verma
DOI:10.3998/ark.5550190.0014.219
日期:——
benzotriazole based N,O bidentate liga nds for the Cu-catalyzed N-arylation of πexcessive nitrogen heterocycles is described. This ligand accomplishes C-Ncoupling of Nheterocycles and C-Ccoupling of boronic acids with a variety of hindered, functionalized aryl/heteroaryl halides under mild reaction conditi ons in good to excellent yields. Using his ligandC-N and C-C (Suzuki) couplings with bromoarenes
描述了一种有效的基于苯并三唑的 N,O 双齿配体,用于铜催化的 π 过量氮杂环的 N-芳基化。该配体在温和的反应条件下以良好至极好的产率完成了杂环的 CN 偶联和硼酸与各种受阻的官能化芳基/杂芳基卤化物的 CC 偶联。使用他的配体 CN 和 CC (Suzuki) 与溴芳烃偶联可以在较少的催化剂负载下进行。一系列失活和受阻的芳基卤化物可以干净地反应,以高产率提供功能化的联芳基衍生物。
A Visible-Light-Mediated Oxidative CN Bond Formation/Aromatization Cascade: Photocatalytic Preparation of N-Arylindoles
作者:Soumitra Maity、Nan Zheng
DOI:10.1002/anie.201205137
日期:2012.9.17
Just add light and air: Structurally diverse N‐arylindoles can be prepared from readily prepared o‐styryl anilines through visible‐light photocatalysis. The reaction, which is conducted open to air, is mediated by [Ru(bpz)3](PF6)2 (bpz=2,2′‐bipyrazine) and involves both CNbondformation and aromatization (see scheme). Using suitably substituted substrates, a 1,2‐carbon shift can be also incorporated
只需添加光和空气:可以通过可见光光催化从容易制备的邻苯乙烯基苯胺制备结构多样的N-芳基吲哚。该反应在空气中进行,由 [Ru(bpz) 3 ](PF 6 ) 2 (bpz=2,2′-联吡嗪)介导,涉及 C N 键形成和芳构化(见方案)。使用适当取代的底物,1,2-碳转移也可以纳入该级联反应中。
A Versatile Approach to Ullmann C–N Couplings at Room Temperature: New Families of Nucleophiles and Electrophiles for Photoinduced, Copper-Catalyzed Processes
作者:Daniel T. Ziegler、Junwon Choi、José María Muñoz-Molina、Alex C. Bissember、Jonas C. Peters、Gregory C. Fu
DOI:10.1021/ja4060806
日期:2013.9.4
The use of light to facilitate copper-catalyzed cross-couplings of nitrogen nucleophiles can enable C-N bond formation to occur under unusually mild conditions. In this study, we substantially expand the scope of such processes, establishing that this approach is not limited to reactions of carbazoles with iodobenzene and alkyl halides. Specifically, we demonstrate for the first time that other nitrogen
A bi-functional sugar-based surfactant ALA14 was designed as the ligand and micelle constructor and demonstrated to promote the copper-catalyzed C–X coupling reaction in water. The nature of this micelle, formed by sugar-based surfactants, was investigated with CMC, DLS, and TEM, by which encapsulation and aggregation of the substrates in micelles were verified. Additionally, it was addressed by 1H-NMR
A Newly Designed Carbohydrate-Derived Alkylamine Promotes Ullmann Type C–N Coupling Catalyzed by Copper in Water
作者:Xin Ge、Hua-Jun Fan、Guoquan Zhou、Wen Chen、Shihui Zhang、Xuemin Liu、Zehui Yang
DOI:10.1055/s-0037-1611695
日期:2019.1
biodegradable carbohydrate-derived alkylamine was designed and employed as ligand for Ullmann type C–N coupling catalyzed by copper in water. The coupling of aryl iodide and N-nucleophiles were examined and moderate to excellent yields were obtained. In addition, the in-water coupling strategy was expanded successfully to the reaction of indoles with 4-iodoanisole. By measuring the solubility, it is speculated