KF-Al₂O₃as an Efficient and Recyclable Basic Catalyst for the Synthesis of 4<i>H</i>-Pyran-3-carboxylates and 5-Acetyl-4<i>H</i>-pyrans  

作　　者：Iadeishisha Kharbangar Md. Rumum Rohman Hormi Mecadon Bekington Myrboh 

机构地区：[1]Department of Chemistry, North-Eastern Hill University (NEHU), Shillong, India

出　　处：《International Journal of Organic Chemistry》2012年第3期282-286,共5页有机化学国际期刊（英文）

摘　　要：KF-Al2O3 as a recyclable basic catalyst for the three-component synthesis of 4H-pyran derivatives by the reaction of aldehydes, malononitrile and active methylene dicarbonyl compounds in ethanol at room temperature is described. The protocol is environmentally benign and offers rapid access to a wide array of 4H-pyran heterocycles in good to excellent yields.KF-Al2O3 as a recyclable basic catalyst for the three-component synthesis of 4H-pyran derivatives by the reaction of aldehydes, malononitrile and active methylene dicarbonyl compounds in ethanol at room temperature is described. The protocol is environmentally benign and offers rapid access to a wide array of 4H-pyran heterocycles in good to excellent yields.

关 键 词：4H-Pyran derivatives Ethanol KF-AL2O3 Room Temperature Three-Component 

分 类 号：O6[理学—化学]