Synthesis of Polycyclic Nitrogen Heterocycles via Cascade Pd-Catalyzed Alkene Carboamination/Diels–Alder Reactions
作者:Derick R. White、John P. Wolfe
DOI:10.1021/acs.orglett.5b00896
日期:2015.5.15
Cascade Pd-catalyzed alkenecarboamination/Diels–Alder reactions between bromodienes and amines bearing two pendant alkenes are described. These transformations generate 4 bonds, 3 rings, and 3–5 stereocenters to afford polycyclic nitrogen heterocycles with high diastereoselectivity.
Palladium-Catalyzed Aerobic Oxidative Cyclization of Aliphatic Alkenyl Amides for the Construction of Pyrrolizidine and Indolizidine Derivatives
作者:Dan Yang、Kai-Yip Lo、Liu Ye
DOI:10.1055/s-0036-1588502
日期:2017.8
An efficient palladium-catalyzed aerobic oxidative cyclization has been developed to synthesize a variety of pyrrolizidine and indolizidine derivatives from simple aliphatic alkenyl amides in moderate to good yields. The reaction features the capability of accessing various N-heterocycles and the use of molecular oxygen (1 atm) as the green oxidant.
chemistry because of its wide occurrence in a variety of biological and pharmaceutical molecules. We report an efficient metal‐free, highly stereoselective intramolecular diamination using a novel chiral hypervalentiodine reagent together with its application as an efficient catalyst for the synthesis of diamines.