An efficient synthesis of 2H-chromen-3-yl derivatives via CuI/(NH4)2HPO4 catalyzed reaction of O-propargyl salicylaldehydes with active methylene compounds
作者:Kumkum Kumari、Dushyant Singh Raghuvanshi、Krishna Nand Singh
DOI:10.1016/j.tet.2012.10.066
日期:2013.1
alononitriles/cyanoacrylates/cyanoacrylamides with variant structural features have been serendipitously formed during an endeavour to prepare 5H-chromeno[3,4-c]pyridine using CuI/(NH4)2HPO4 catalyzed reaction of O-propargyl salicylaldehyde with malononitrile/ethyl cyanoacetate/cyanoacrylamide. The process is convenient, speedy and high yielding, and the products formed have been finally characterized
在使用CuI /(NH 4)2 HPO 4催化制备5 H -chromeno [3,4- c ]吡啶的过程中,已经偶然形成了具有不同结构特征的2 H -Chromen-3-基-亚甲基丙二腈/氰基丙烯酸酯/氰基丙烯酰胺。的反应ø -propargyl水杨醛与丙二腈/氰基乙酸乙酯/氰基丙烯酰胺。该方法方便,快速且高产率,并且通过X射线衍射分析最终表征了形成的产物。