Ionic Liquid Catalyzed One-Pot, Three Component Synthesis of Dihydropyrano[2,3-c]pyrazole under Green Conditions
作者:S. Yakaiah、G. Buchappa、K. Durgaprasad、K. Ravibabu、P. Aparna
DOI:10.14233/ajchem.2016.20008
日期:——
A new series of 6-amino-3-methyl-4-phenyl-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile derivatives were synthesized, where the three-component reaction of ethyl 3-oxobutanoate, hydrazinehydrate, aromatic aldehyde and malononitrile performed under green conditions by using ionic liquid [Bmim]BF4 as reaction media. This method has the several advantages such as good yields, shorter reaction time, operational simplicities and eco-friendliness. The chemical structures of all the synthesized compounds were well characterized by physical, analytical and spectroscopic techniques.
以离子液体[Bmim]BF4 为反应介质,在绿色条件下进行 3-氧代丁酸乙酯、肼水合物、芳香醛和丙二腈的三组分反应,合成了一系列新的 6-氨基-3-甲基-4-苯基-1,4-二氢吡喃并[2,3-c]吡唑-5-甲腈衍生物。该方法具有收率高、反应时间短、操作简单和环保等优点。所有合成化合物的化学结构都通过物理、分析和光谱技术得到了很好的表征。