An efficient synthesis of 2H-chromen-3-y1 derivatives via CuI/(NH4)2HPO4 catalyzed reaction of O-propargyl salicylaldehydes with active methylene compounds

被引：19
|
作者：
Kumari, Kumkum [1 ]
Raghuvanshi, Dushyant Singh [1 ]
Singh, Krishna Nand [1 ]
机构：
[1] Banaras Hindu Univ, Fac Sci, Dept Chem, Varanasi 221005, Uttar Pradesh, India
来源：
TETRAHEDRON | 2013年 / 69卷 / 01期
关键词：
Chromenes; Copper catalysis; O-Propagyl salicylaldehydes; Cycloaddition; Knoevenagel condensation; DIELS-ALDER REACTION; SOLVENT-FREE; HETEROCYCLES; ALKYNE; ACID; ACTIVATION; IMINES; INDOLE;
D O I：
10.1016/j.tet.2012.10.066
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
2H-Chromen-3-yl-methylenemalononitriles/cyanoacrylates/cyanoacrylamides with variant structural features have been serendipitously formed during an endeavour to prepare 5H-chromeno[3,4-c]pyridine using CuI/(NH4)(2)HPO4 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 by X-ray diffraction analysis. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：82 / 88
页数：7
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