Catalyst- and Substituent-Controlled Regio- and Stereoselective Synthesis of Indolyl Acrylates by Lewis-Acid-Catalyzed Direct Functionalization of 3-Formylindoles with Diazo Esters
作者:Sana Jamshaid、Shreedhar Devkota、Yong Rok Lee
DOI:10.1021/acs.orglett.1c00277
日期:2021.3.19
A facile and efficient In(OTf)3- and BF3·OEt2-catalyzed direct transformation of 3-formylindoles with diazo esters has been developed for synthesizing diverse and functionalized indolyl acrylates. This one-pot protocol furnishes various (Z)-α-hydroxy-β-indolyl acrylates, (E)-β-(2-alkoxy-2-oxoethoxy)-α-indolyl acrylates, and (Z)-3-hydroxy-2-indolyl acrylates by a catalyst- and substituent-controlled
Rh(<scp>iii</scp>)-Catalyzed tandem indole C4-arylamination/annulation with anthranils: access to indoloquinolines and their application in photophysical studies
the tandem C4 arylamination/annulation of indole derivatives with anthranil to provide indoloquinoline moieties. This method is simple and regioselective with a wide scope and functional group tolerance. Mechanistic studies revealed the important role of the newly installed azacycle in the conversion of O-protected aldoximes to their cyano derivatives. Studies were carried out to explore the promising
Copper-Catalyzed Aerobic Methyl/Methylene Oxygenation and C-H Formylation with a DABCO-DMSO System for the Synthesis of Carbonyl Indoles and Pyrroles
作者:Shunsuke Chiba、Yi-Feng Wang、Feng-Lian Zhang
DOI:10.1055/s-0031-1290815
日期:2012.5
Abstract Copper-catalyzed aerobic methyl/methylene oxygenation of substituted indoles and pyrroles was developed using 1,4-diazabicyclo[2.2.2]octane (DABCO) as an additive in dimethyl sulfoxide (DMSO). Similar aerobic catalytic conditions could also be utilized for direct C–H formylation of C(3) on indoles and C(2) on pyrroles. Copper-catalyzed aerobic methyl/methylene oxygenation of substituted indoles