develop drugs for the treatment of cancer. A series of novel hybrid compounds of isatin and Michael acceptor were designed and synthesized on the basis of association principle. These hybrid compounds were tested for cytotoxic potential against human cancer cell lines namely, BGC-823, SGC-7901 and NCI-H460 by MTT assay. Most compounds showed good anti-growth activities in all tested human cancer cells
Studies on the stereochemical assignment of 3-acylidene 2-oxindoles
作者:Steven J. Edeson、Julong Jiang、Stephen Swanson、Panayiotis A. Procopiou、Harry Adams、Anthony J. H. M. Meijer、Joseph P. A. Harrity
DOI:10.1039/c4ob00496e
日期:——
The designation of E/Z-geometrical isomers in 3-acylidene 2-oxindoles by NMR spectroscopy can lead to erroneous assignment of alkene stereochemistry because of the narrow chemical shift range observed over a large series of analogues. In contrast, UV-Vis spectroscopy offers a convenient and more reliable method for alkene stereochemical assignment. A combination of X-ray crystallography and theoretical studies shows that the observed differences in UV-Vis spectroscopic behaviour relate to the twisted conformation of the Z-isomers that provides reduced conjugation and weaker hypsochromic (blue-shifted) absorbances relative to those of the E-isomers.
Highly efficient regioselective synthesis of pyrroles via a tandem enamine formation–Michael addition–cyclization sequence under catalyst- and solvent-free conditions
作者:Thavaraj Vivekanand、Perumal Vinoth、B. Agieshkumar、Natarajan Sampath、Arumugam Sudalai、J. Carlos Menéndez、Vellaisamy Sridharan
DOI:10.1039/c5gc00365b
日期:——
An efficient three-component, catalyst-, solvent-, and column chromatography-free procedure was developed for the synthesis of 3-(1H-pyrrol-3-yl)indolin-2-ones.
A Novel One-Pot Green Synthesis of Dispirooxindolo-pyrrolidines via 1,3-Dipolar Cycloaddition Reactions of Azomethine Ylides
作者:Abdulrahman Almansour、Natarajan Arumugam、Raju Kumar、Govindasami Periyasami、Hazem A. Ghabbour、Hoong-Kun Fun
DOI:10.3390/molecules20010780
日期:——
been accomplished via a one-pot three component 1,3-dipolar cycloaddition reaction. The reaction of azomethine ylides generated in situ from L-phenylalanine and substituted isatins with a series of unusual (E)-2-oxoindolino-3-ylidene acetophenone dipolarophiles in the ionic liquid 1-butyl-3-methylimidazolium bromide [bmim]BF4, furnished the cycloadducts in good yields, with the regioisomers 5a–f being
An Environmentally Benign Cascade Reaction of 1,1-Enediamines (EDAMs) for Site-Selective Synthesis of Highly Functionalized 2,10-Dihydro-1<i>H</i>-imidazo[1′,2′:1,6]pyrido[2,3-<i>b</i>]indoles and Pyrroles
作者:Cong-Hai Zhang、Rong Huang、Zhong-Wei Zhang、Jun Lin、Sheng-Jiao Yan
DOI:10.1021/acs.joc.1c00211
日期:2021.4.16
were synthesized by the facile reaction of the (E)-3-(2-oxo-2-phenylethylidene)indolin-2-one derivatives and 2-(nitromethylene)imidazolidine under basic conditions (Cs2CO3) in ethanol. In addition, a diverse array of EDAM substrates (2b–2k) were tested in this reaction to afford the expected target compounds 5. This protocol is suitable for the combinatorial and parallelsyntheses of natural-like products
从(E)-3-(2-氧代-2-苯基亚乙基)吲哚-2-酮衍生物1和1,1合成吡啶并[2,3- b ]吲哚(α-咔啉,3)的新协议乙二胺(EDAM)2a通过意外的级联反应在乙醇中开发出来。通过相同的反应,尽管将混合物搅拌更长的时间(约48小时),也获得了吡啶并[2,3- b ]吲哚衍生物4。其结果是,二种官能α咔啉的3和4是由(的容易反应合成ë)-3-(2-氧代-2-苯基亚乙基)吲哚啉-2-酮衍生物和2-(硝基亚甲基)咪唑烷在乙醇中的碱性条件下(Cs 2 CO 3)。此外,在该反应中测试了多种EDAM底物(2b – 2k),以提供预期的目标化合物5。该方案适用于天然产物的组合和平行合成,包括高度官能化的α-咔啉和吡咯,尤其是2-氧代吲哚-3-基吡咯。该方法具有几个优点,例如操作简单实用(仅需过滤和洗涤,无需柱色谱),收率极高(72-98%),并可以产生具有潜在生物学活性的多种目标化合物文库。