An efficient approach for one‐pot three‐component reaction of aromatic amines, α,β‐unsaturated aldehydes and β‐keto esters using magneticnanocrystallineFe3O4 as a catalyst has been described. The corresponding 1,4‐dihydropyridines are obtained in good yields under mild conditions. In addition, the catalyst can be recovered with a magnet and reused at least five consecutive cycles without appreciable
描述了一种使用磁性纳米晶体Fe 3 O 4作为催化剂进行芳族胺,α,β-不饱和醛和β-酮酸酯的单锅三组分反应的有效方法。在温和的条件下,可以良好的收率获得相应的1,4-二氢吡啶。此外,可以用磁体回收催化剂,并至少连续五个循环重复使用,而不会明显降低其催化活性。
Sulfonic Acid Functionalized Silica: An Efficient Heterogeneous Catalyst for a Three-Component Synthesis of 1,4-Dihydropyridines under Solvent-Free Conditions
Sulfonicacidfunctionalized silica catalyzed the three-component reaction of aromatic amines, alpha,beta-unsaturated aldehydes and beta-keto esters forming the corresponding 1,4-dihydropyridines in short reaction times and in high yields.