Karchaudhuri, Nilay; De, Aparna; Mitra, Alok Kumar, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2003, vol. 42, # 6, p. 1537 - 1539
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Electron Donor–Acceptor Complex-Mediated Aerobic Sulfenylation of Indoles under Visible-Light Conditions
efficient B(C6F5)3-catalyzed aerobic oxidative C–S cross-coupling reaction of thiophenol with indoles was developed, affording a wide range of diaryl sulfides in good yields. An electron donor–acceptor complex between B(C6F5)3 and indoles was formed, facilitating the photoinduced single-electron transfer (SET) from indole substrates to the B(C6F5)3catalyst. This protocol demonstrates a new reaction model
开发了一种高效的 B(C 6 F 5 ) 3催化的苯硫酚与吲哚的有氧氧化 C-S 交叉偶联反应,以良好的收率提供了范围广泛的二芳基硫化物。B(C 6 F 5 ) 3和吲哚之间形成了电子供体-受体复合物,促进了从吲哚底物到B(C 6 F 5 ) 3催化剂的光诱导单电子转移(SET) 。该协议展示了使用 B(C 6 F 5 ) 3作为单电子氧化剂的新反应模型。
An iron(<scp>iii</scp>)-catalyzed dehydrogenative cross-coupling reaction of indoles with benzylamines to prepare 3-aminoindole derivatives
作者:Wei-Li Chen、Kun Li、Wei-Cong Liao、Wang-Fu Liang、Pei-Wen Qiu、Cui Liang、Gui-Fa Su、Dong-Liang Mo
DOI:10.1039/d1gc02849a
日期:——
excellent yields through an iron(III)-catalyzed dehydrogenative cross-coupling reaction of 2-arylindoles and primary benzylamines under mild reaction conditions. Mechanistic studies show that a cascade reaction involves a tert-butyl nitrite (TBN)-mediated nitrosation of 2-substituted indoles and a 1,5-hydrogen shift to afford indolenine oximes, sequential iron(III)-catalyzed condensation and a 1,5-hydrogen
我们报告了一种绿色级联方法,通过铁 ( III ) 催化的 2-芳基吲哚和伯苄胺在温和反应条件下的脱氢交叉偶联反应,以良好到优异的产率制备各种 3-氨基吲哚衍生物。机理研究表明,级联反应涉及亚硝酸叔丁酯 (TBN) 介导的 2-取代吲哚的亚硝化和 1,5-氢转移以提供吲哚啉肟、序贯铁 ( III))-催化缩合和 1,5- 氢转移在一锅反应的四个步骤中。该反应显示了吲哚和苄胺的广泛底物范围,并且可以耐受广泛的官能团。此外,反应很容易以克规模进行,反应完成后不会产生废物。3-氨基吲哚产物通过简单的萃取、洗涤和重结晶纯化,无需快速柱色谱。含有3-氨基吲哚单元的双亚胺配体易于一步获得,产率为52%。本方法突出了容易获得的起始材料、简单的纯化程序以及廉价、无毒和环境友好的铁 ( III ) 催化剂的使用。
Discovery of 1,3-diphenyl-1H-pyrazole derivatives containing rhodanine-3-alkanoic acid groups as potential PTP1B inhibitors
Two series of 1,3-diphenyl-1H-pyrazole derivativescontaining rhodanine-3-alkanoic acidgroups were identified as competitive protein tyrosine phosphatase 1B (PTP1B) inhibitors. Among the compounds studied, IIIv was found to have the best in vitro inhibition activity against PTP1B (IC50 = 0.67 ± 0.09 µM) and the best selectivity (9-fold) between PTP1B and T-cell protein tyrosine phosphatase (TCPTP)
Copper-Catalyzed Aerobic Dehydrogenative Cyclization of N-Methyl-N-phenylhydrazones: Synthesis of Cinnolines
作者:Guangwu Zhang、Jinmin Miao、Yan Zhao、Haibo Ge
DOI:10.1002/anie.201204339
日期:2012.8.13
The title reaction proceeds through an oxidation/cyclization sequence, thus representing the first copper‐catalyzed coupling reaction of hydrazones through a CH bond functionalization process (see scheme; DMF=N,N′‐dimethylformamide, Py=pyridine). The method provides an environmentally friendly and atom‐efficient approach to biologically active cinnoline derivatives.
O 2 占主导地位:标题反应按氧化/环化顺序进行,因此代表through通过CH键官能化过程进行的首次铜copper偶联反应(请参阅示意图; DMF = N,N'-二甲基甲酰胺,Py =吡啶)。该方法为生物活性的cinnoline衍生物提供了一种环境友好且原子效率高的方法。
Synthesis of novel 1,3-diaryl pyrazole derivatives bearing rhodanine-3-fatty acid moieties as potential antibacterial agents
In the present study, a series of 1,3-diaryl pyrazole derivativesbearing rhodanine-3-fatty acid moieties were synthesized and their antimicrobial activities were tested against various Gram-positive and Gram-negative bacteria. 1,3-diaryl-4-formylpyrazoles were synthesized as key intermediates following a Vilsmeier–Haack strategy. Several compounds with an MIC of 2 μg/mL, exhibited stronger antibacterial