Copper‐Promoted N‐Arylation of the Indole Side Chain of Tryptophan Using Triarylbismuthines
作者:Adrien Le Roch、Hwai‐Chien Chan、Alexandre Gagnon
DOI:10.1002/ejoc.202000667
日期:2020.9.30
for the regioselective N‐arylation of the indole sidechain of tryptophan using triarylbismuth reagents as the arylating agent is reported. The reaction is catalyzed by copper(II) acetate in the presence of an organic base. The protocol allows the installation of electron rich or poor aryl groups with substituents at any position, shows excellent scope and functional group compatibility, and retains
Comparison of Copper(II) Acetate Promoted N-Arylation of 5,5-Dimethyl Hydantoin and Other Imides with Triarylbismuthanes and Aryl Boronic Acids
作者:Helmut Hügel、Colin Rix、Karin Fleck
DOI:10.1055/s-2006-949638
日期:2006.9
This work demonstrates that the copper acetate promoted N-arylation of imides with boronic acids can be employed as a major method for the synthesis of N3-aryl hydantoins.
Copper Salt Catalyzed Coupling of Organobismuth Reagents and Azo Compounds
作者:Uno Mäeorg、Olga Tšubrik、Ksenija Kisseljova
DOI:10.1055/s-2006-950408
日期:2006.9
A new copper salt catalyzed C-N coupling is described. This smooth reaction between azo compounds and organobismuth reagents provides efficient and highly regioselective access to Boc-protected aryl hydrazines. The yields under optimized conditions are mostly excellent and the synthetic procedure is robust and simple.
Synthesis of 2-Aryl-3-(arylselanyl)imidazo[1,2-a]pyridines: Copper-Catalyzed One-Pot, Two-Step Se-Arylation of Selenium with Imidazopyridines and Triarylbismuthanes
donors containing elements such as boron, silicon, tin, and iodine. A simple and general method for the synthesis of 2-aryl-3-(arylselanyl)imidazo[1,2-a]pyridines is described. A one-pot, two-step reaction between triarylbismuthanes and diimidazopyridyl diselenides, generated from imidazo[1,2-a]pyridines and Se powder in the presence of CuI and 1,10-phenanthroline, affords 3-selanylimidazopyridines in moderate
摘要 描述了一种简单且通用的合成2-芳基-3-(芳基硒基)咪唑并[1,2- a ]吡啶的方法。在CuI和1,10-菲咯啉的存在下,由咪唑并[1,2- a ]吡啶和Se粉末生成的三芳基双muthanes与二咪唑并吡啶基二硒化物之间的一锅两步反应,可提供中等收率至优异收率的3-selanylimidazopyridines。在有氧条件下。反应有效地进行,并且铋上的硒和所有芳基转移到偶联产物上。与其他含有硼,硅,锡和碘等元素的芳基供体相比,三芳基双muthanes可获得更好的结果。 描述了一种简单且通用的合成2-芳基-3-(芳基硒基)咪唑并[1,2- a ]吡啶的方法。在CuI和1,10-菲咯啉的存在下,由咪唑并[1,2- a ]吡啶和Se粉末生成的三芳基双muthanes与二咪唑并吡啶基二硒化物之间的一锅两步反应,可提供中等收率至优异收率的3-selanylimidazopyridines。在
Multicomponent synthesis of sulfonamides from triarylbismuthines, nitro compounds and sodium metabisulfite in deep eutectic solvents
作者:Xavier Marset、Javier Torregrosa-Crespo、Rosa M. Martínez-Espinosa、Gabriela Guillena、Diego J. Ramón
DOI:10.1039/c9gc01541h
日期:——
Na2S2O5 and nitro compounds in a DeepEutecticSolvent (DES) as a reaction medium is described. Thus, triarylbismuthines are used as reagents for the incorporation of SO2 into organic motifs. The bismuth salts formed as by-products can be easily removed from the crude reaction mixture by precipitation with water, while the use of volatile organic compounds (VOCs) as solvents can be avoided in the entire
描述了一种在深度共晶溶剂(DES)中使用铜催化的方法从三芳基双变异蛋白,Na 2 S 2 O 5和硝基化合物开始可持续合成磺酰胺的方法。因此,将三芳基双突变蛋白用作掺入SO 2的试剂变成有机图案。通过用水沉淀,可以很容易地从粗反应混合物中除去作为副产物形成的铋盐,同时在整个过程中可以避免使用挥发性有机化合物(VOC)作为溶剂。用作溶剂的低共熔混合物已得到充分表征,初步结果证明其毒性低。设计的DES还可以进行新颖的多组分反应,从而节省时间并减少纯化步骤,能源和成本。