Palladium-Catalyzed Alkynylative Lactonization of Unsaturated Bicyclic Carboxylic Acids: Synthesis of Fused Polycyclic γ-Lactone Compounds
作者:Ning Sun、Yibiao Li、Gengming Yin、Shaohua Jiang
DOI:10.1002/ejoc.201300037
日期:2013.5
Unsaturated bicyclic carboxylicacids undergo palladium-catalyzed coupling with bromoalkynes to produce γ-alkynyl lactones in moderate to good yields with excellent chemo- and regioselectivity. The reaction conditions were extremely mild, and functional groups such as methyl, methoxy, chloro, and bromo were tolerated under the optimized reaction conditions. Moreover, γ-chloroalkenyl lactones were facilely