A serendipitous cascade of rhodium vinylcarbenoids with aminochalcones for the synthesis of functionalized quinolines
作者:Kiran Chinthapally、Nicholas P. Massaro、Haylee L. Padgett、Indrajeet Sharma
DOI:10.1039/c7cc07181g
日期:——
A serendipitous five-step cascade of rhodium vinylcarbenoids with aminochalcones enables a unique synthetic approach to highly functionalized tri- and tetra-cyclic quinolines. The cascade reaction begins with the insertion of aminochalcone nitrogen into rhodium vinylcarbenoids followed by intramolecular aldol cyclization to provide a substituted indoline intermediate that undergoes an oxy-Cope rearrangement
ZnCl2-Catalyzed Intramolecular Cyclization Reaction of 2-Aminochalcones Using Polymer-Supported Selenium Reagent: Synthesis of 2-Phenyl-4-quinolones and 2-Phenyl-2,3-dihydroquinolin-4(1H)-one
作者:E Tang、Bangzheng Chen、Lianpeng Zhang、Wen Li、Jun Lin
DOI:10.1055/s-0030-1259549
日期:2011.3
A new and efficient method for the synthesis of 2-phenyl-4-quinolones and 2-phenyl-2,3-dihydroquinolin-4(1H)-ones is described. The reaction involves ZnCl2-mediated polystyrene-supported selenium-induced intramolecular cyclization of 2-aminochalcones and subsequent traceless or functionalizing cleavage of selenium linker.
The enantioselective synthesis of 2-aryl-substituted 2,3-dihydroquinolin-4-ones, a class of heterocyclic compounds with interesting biological activities, has been achieved through a Brønsted acidcatalyzed enantioselectiveintramolecular Michael addition. The products are available in moderate to high yields and with good enantioselectivities. Graphical Abstract Asymmetric Brønsted Acid-catalyzed Intramolecular
One-Pot Synthesis of Phenanthridinones by Using a Base-Catalyzed/Promoted Bicyclization of α,β-Unsaturated Carbonyl Compounds with Dimethyl Glutaconate
作者:Lei Li、Jia-Jia Chen、Xing-Lan Kan、Lu Zhang、Yu-Long Zhao、Qun Liu
DOI:10.1002/ejoc.201500414
日期:2015.8
A new strategy for the highly efficient construction of functionalized phenanthridinones has been developed by starting from readily available acyclic α,β-unsaturated carbonyl compounds that have a 2-aminophenyl group at the β-position or carbonyl carbon and dimethyl glutaconate. The domino reaction involves an intermolecular [3+3] annulation followed by an intramolecular aza-cyclization/aromatization