Crown ether complex cation ionic liquids (CECILs) as environmentally benign catalysts for three-component synthesis of 4,5-dihydropyrano[3,2-c]chromene and 4,5-dihydropyrano[4,3-b]pyran derivatives
作者:Mehdi Abaszadeh、Mohammad Seifi
DOI:10.1007/s11164-014-1855-7
日期:2015.10
Crown ether complex cation ionic liquids (CECILs) catalyze three-component reaction of aromatic aldehydes, malononitrile, and 4-hydroxycoumarin or 4-hydroxy-6-methylpyrone, in EtOH under reflux, for synthesis of 4,5-dihydropyrano[3,2- c ]chromene and 4,5-dihydropyrano[4,3- b ]pyran derivatives. CECILs are environmentally benign, easily obtained, stable catalysts. High conversion, short reaction times
冠醚络合物阳离子离子液体(CECIL)在EtOH中回流下催化芳香醛,丙二腈和4-羟基香豆素或4-羟基-6-甲基吡喃酮的三组分反应,合成4,5-二氢吡喃[3,2] - c ^ ]色和4,5-二氢吡喃并[4,3- b ]吡喃衍生物。CECIL是对环境无害,易于获得的稳定催化剂。高转化率,较短的反应时间和更清洁的反应曲线是该方法的一些优势。