Synthesis of Multi-Substituted 2-Iminopyridine by Conjugate Addition of Ethyl Cyanoacetate Derivatives to Alkynyl Imines
作者:Iwao Hachiya、Yushi Minami、Tetsuya Aramaki、Makoto Shimizu
DOI:10.1002/ejoc.200701039
日期:2008.3
The synthesis of multi-substituted 2-iminopyridines by conjugate addition of ethyl cyanoacetate derivatives to alkynyl imines has been developed. The reaction of ethyl cyanoacetate derivatives with alkynyl imines provided multi-substituted 2-iminopyridines in good yields. Also described is the transformation of 2-iminopyridines into 2-aminopyridines by deprotection of the substituent on the nitrogen
已经开发了通过将氰基乙酸乙酯衍生物与炔基亚胺共轭加成来合成多取代的 2-亚氨基吡啶。氰基乙酸乙酯衍生物与炔基亚胺的反应以良好的产率提供了多取代的2-亚氨基吡啶。还描述了通过在酸性条件下将氮上的取代基脱保护而将 2-亚氨基吡啶转化为 2-氨基吡啶。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)