A simple, green and multi component, one pot synthesis of 14-Aryl-14H-dibenzo[a, j]xanthene derivatives by condensation of aryl aldehydes with 2-naphthol using magnetically separable and recyclable heterogeneous catalyst nano nickel cobalt ferrite (Ni0.5Co0.5Fe2O4), has been described. In addition, a one-pot three component condensation of aryl aldehydes, 2-naphthol and dimedone has been developed to furnish 12-Aryl-8, 9, 10, 12-tetrahydrobenzo[a]xanthene-11-one derivatives in good to excellent yields under the same reaction conditions. The main advantage of this method is the nano catalyst can be reused up to five reaction cycles without losing the catalytic activity.
利用磁性可分离和可回收的异相催化剂纳米
镍钴铁氧体(Ni0.5Co0.5Fe2O4),通过芳基醛与
2-萘酚的缩合,描述了一种简单、绿色、多组分、一锅合成 14-芳基-14H-二苯并[a,j]呫吨衍
生物的方法。此外,还开发出了芳基醛、
2-萘酚和
二甲酮的一锅三组分缩合法,在相同的反应条件下,可生成 12-芳基-8, 9, 10, 12-四氢苯并[a]
氧杂蒽-11-酮衍
生物,收率从良好到极佳。这种方法的主要优点是纳米催化剂可以重复使用长达五个反应周期而不会失去催化活性。