An efficient synthesis of 2,5-diimino-furans via Pd-catalyzed cyclization of bromoacrylamides and isocyanides

作者:Jiang Huanfeng*; Yin Meizhou; Li Yibiao; Liu Bifu; Zhao Jinwu; Wu Wanqing
来源:Chemical communications, 2014, 50(16): 2037-2039.
DOI:10.1039/c3cc47724j

摘要

A novel palladium-catalyzed cyclization of bromoacrylamides with isocyanides gives substituted 2,5-diimino-furans, which can be used as the precursor of maleamides. This synthesis likely proceeds, after isonitrile insertion into C-Pd(II) bond, through the coordination of the amide oxygen atom to the Pd(II) centre as a key step.