Palladium-Catalyzed Oxidative Annulation<i>via</i>CH/NH Functionalization: Access to Substituted Pyrroles
作者:Shiyong Peng、Lei Wang、Jiayao Huang、Shaofa Sun、Haibing Guo、Jian Wang
DOI:10.1002/adsc.201300512
日期:2013.9.16
Pyrroles, ubiquitous bioactive heterocycles in nature, are readily prepared via a palladium‐catalyzedoxidative annulation of cyclic trans‐enamines to various internal alkynes in the absence of a directing group.
Acetic acid promoted an efficient and eco-friendly one-pot synthesis of functionalized novel isoxazolyl amino chromenopyrrole derivatives in aqueous medium
作者:Nallamothu Vanaja Rani、Ravindhranath Kunta
DOI:10.1080/00397911.2020.1846058
日期:2021.2.16
An efficient, economical, and environmentally friendly method has been reported for one-potsynthesis of isoxazolyl amino chromenopyrrole derivativesfrom 4-amino-3-methyl-5-styrylisoxazoles, aryl ...
An effective tandem reaction of 4-aminocoumarins and 1,3-diarylpropenes mediated by Cu(OTf)2/TBHP (tert-butyl hydroperoxide)/O2 that provides various benzopyrano[4,3-b]pyridines in moderate to good yields is disclosed. The reaction proceeds through oxidative coupling, intramolecular cyclization, and dehydro-aromatization. This approach has the advantages of high atom-economy, environmental compatibility