Pd-Catalyzed Oxidative Coupling of Enamides and Alkynes for Synthesis of Substituted Pyrroles
摘要:
A novel and efficient palladium(II)-catalyzed alkenyl C-H activation oxidative annulation of enamides with alkynes for the synthesis of substituted pyrroles has been developed. The reaction tolerates a wide range of functional groups and is a reliable method for the synthesis of triaryl-substituted pyrroles in high yields.
Versatile Pyrrole Synthesis through Ruthenium(II)-Catalyzed Alkene C–H Bond Functionalization on Enamines
作者:Lianhui Wang、Lutz Ackermann
DOI:10.1021/ol303224e
日期:2013.1.4
An efficient ruthenium(II) catalyst enabled broadly applicable oxidative alkyne annulations with electron-rich enamines to provide diversely decorated pyrroles, even in an aerobic fashion with air as the ideal oxidant.
An efficient and regioselective cobalt-catalyzed synthesis of multi-substituted pyrroles is reported by the use of readily available enamides and alkynes. The success of the process relies on the employment of a catalytic amount of Cp*Co(CO)I2 together with CuO as the oxidant.