Enantioselective Synthesis of Azaflavanones Using Organocatalytic 6-<i>endo</i>Aza-Michael Addition
作者:Shuanghua Cheng、Lili Zhao、Shouyun Yu
DOI:10.1002/adsc.201300920
日期:2014.3.24
A method to prepare highly enantioenriched azaflavanonesusing an organocatalytic 6‐endo aza‐Michael addition has been described. A variety of 2‐aryl‐, 2‐vinyl‐ and 2‐methylazaflavanones were prepared in good yields (53–84%) and excellent enantioselectivities (97.6:2.4 to 99.3:0.7 er).
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
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