Manganese-Mediated Reductive Transamidation of Tertiary Amides with Nitroarenes
作者:Chi Wai Cheung、Jun-An Ma、Xile Hu
DOI:10.1021/jacs.8b03739
日期:2018.6.6
an important class of organic compounds, which have widespread industrial applications. Transamidation of amides is a convenient method to generate new amides from existing ones. Tertiary amides, however, are challenging substrates for transamidation. Here we describe an unconventional approach to the transamidation of tertiary amides using nitroarenes as the nitrogen source under reductive conditions
Organocatalytic, Enantioselective Reductive Bis-functionalization of Secondary Amides: One-Pot Construction of Chiral 2,2-Disubstituted 3-Iminoindoline
We report the first catalytic, enantioselectivereductive bis-functionalization of common amides, which provides a facile access to a variety of 2,2-disubstituted 3-iminoindolines in good yields and with excellent enantioselectivities. The reaction conditions are quite mild and can be run on a gram scale. In this one-pot reaction, three C-C bonds, one ring, and one nitrogen-containing tetrasubstituted
Palladium-Catalysed Multicomponent Aminocarbonylation of Aryl or Heteroaryl Halides with [Mo(CO)<sub>6</sub>] and Aryl- or Heteroarylamines Using Conventional Heating
作者:Agathe Begouin、Maria-João R. P. Queiroz
DOI:10.1002/ejoc.200900167
日期:2009.6
synthesized in short reaction times by palladium-catalysedmulticomponentaminocarbonylation of either electron-deficient or electron-rich heteroarylhalides and p-iodoanisole with several arylamines bearing either electron-donating or -withdrawing groups and aminopyridines using [Mo(CO)6] as a solid CO source and conventionalheating. Starting from heteroaryl bromides, a palladacycle with tBu3PHBF4
二(杂)芳基酰胺已通过钯催化的多组分氨基羰基化反应合成缺电子或富电子杂芳基卤化物和对碘苯甲醚与几种带有给电子或吸电子基团的芳胺和氨基吡啶,使用 [Mo (CO)6] 作为固体 CO 源和常规加热。从杂芳基溴化物开始,需要以 tBu3PHBF4 作为配体的钯环以及作为碱的二恶烷中的 DBU 和 125°C 的温度。来自(杂)芳基碘化物、不含配体的 Pd(OAc)2 和 DBU 在 110 °C 下用于二恶烷中。在后一种条件下,我们能够将此反应应用于失活的氨基吡啶以获得相应的二(杂)芳基酰胺。我们已经证明这些反应可以在常规加热(110-125°C)下进行,以在较短的反应时间(1-3 小时)内以中等至高产率产生相应的二(杂)芳基酰胺,而无需兆瓦辐照。2-碘苯甲酸或2-碘苯甲酸甲酯与对茴香胺通过一步羰基化环化反应得到了N-取代的异吲哚啉-1,3-二酮。因此,我们使用常规加热将这种钯催化的氨基羰基化反应的范围与
Copper(<scp>ii</scp>) incorporated functionalized polystyrene catalyzed N-arylation of amides under solvent free condition with broad substrate scope
作者:Md. Mominul Islam、Mita Halder、Anupam Singha Roy、Sauvik Chatterjee、Asim Bhaumik、Sk. Manirul Islam
DOI:10.1039/c6ra24459a
日期:——
We demonstrate here, a new polystyrene supported Cu(II) catalyzed proficient synthetic methodology for the facile N-arylation of aromatic, aliphatic, cyclic and heterocyclic amides with aryl halides underneatconditions. The catalyst, PS–Cu(II)–ala, was prepared through the grafting of copper metal on a polystyrene-β-alanine imine network. The catalyst shows a wide range of substrate scope and excellent
Catalytic Hydrogenation of α-Iminophosphonates as a Method for the Synthesis of Racemic and Optically Active α-Aminophosphonates
作者:Nataliya S. Goulioukina、Grigorii N. Bondarenko、Sergey E. Lyubimov、Vadim A. Davankov、Konstantin N. Gavrilov、Irina P. Beletskaya
DOI:10.1002/adsc.200700466
日期:2008.2.22
It was shown that the catalytic hydrogenation of α-iminophosphonates by molecular hydrogen can serve as a convenient method for the synthesis of racemic and opticallyactive α-aminophosphonates. Up to 94% ee was achieved in the rhodium-catalyzed enantioselective hydrogenation using chiral ligand (R)-BINAP.