A three‐step, one‐pot tandem reaction including radical nucleophilic alkylation/cyclization/aromatization was developed using 0.3 equivalents of silver(I) acetate (AgOAc) as the catalyst and 2 equivalents of ammonium persulfate [(NH4)2S2O8] as the oxidant. This strategy is highly efficient for the assembly of pentacyclic complex carbazoles from aryl‐fused bromobenzoquinones and indol‐3‐ylpropanoic
使用0.3当量的乙酸银(I)(AgOAc)作为催化剂和2当量的过硫酸铵[(NH 4)2 S 2 O 8 ]作为氧化剂。这种方法对于从芳基稠合的溴苯醌和吲哚-3-基丙酸组装五环复合咔唑的总收率(三步)为52-72%,效率很高。该新方法相对于先前报道的方法提供了显着改进,并且将极大地促进五环复合咔唑的类似物文库的构建,并有利于这些化合物的进一步生物学评估。
Syntheses of spiro-oxindoles via KI/oxone-mediated oxidation/cyclization of homotryptamine and homotryptophol derivatives
utility of indoles. In continuation of our research interest in green oxidative cyclization of indoles with Oxone-halide. Here we report an oxidative cyclization of hometryptamine and hometryptophol derivatives using KI/oxone, enabling efficiently access to spiro-heterocyclic oxindoles incorporating tetrahydrofurans, pyrrolidines, pyranones, furanones, and lactams would be difficult to prepare by other
Diradical Polar Reactivity Induced by Electricity‐Mediated Ground State Triplet Nitrenium Species
作者:Nakshatra Banerjee、Apoorv Kushwaha、Shiv Dutt、Debarshi Saha、T. J. Dhilip Kumar、Prabal Banerjee
DOI:10.1002/adsc.202301494
日期:2024.7.2
reactive intermediates to possess a groundstatetriplet character. Excited statetriplet intermediates are generally accessed by means of photon transfer from a tunable light source or by using any triplet sensitizers. N‐acyl N‐alkoxy nitreniums are an important class of reactive intermediates in the synthetic organic community due to their prolonged lifetime and ground‐state singlet character. Herein, we
New small molecule inhibitors of hepatitis C virus
作者:Wanguo Wei、Cuifang Cai、Smitha Kota、Virginia Takahashi、Feng Ni、A. Donny Strosberg、John K. Snyder
DOI:10.1016/j.bmcl.2009.10.070
日期:2009.12
New small molecule inhibitors of HCV were discovered by screening a small library of indoline alkaloid-type compounds. An automated assay format was employed which allowed identification of dimerization inhibitors of core, the capsid protein of the virus. These compounds were subsequently shown to block production of infectious virus in hepatoma cells. (C) 2009 Elsevier Ltd. All rights reserved.