Abstract
A concise and CuI nanoparticle-catalyzed synthesis of tetrahydrochromenediones and dihydropyrano[c]chromenediones under solvent-free grinding conditions via the three-component condensation reaction of Meldrum’s acid, an aromatic aldehyde, and an active methylene compound, including dimedone or 4-hydroxycoumarin, was developed. This new method gives desirable advantages such as simple reaction setup, very mild reaction conditions, production of the desired products in high yields without by-products, recyclability of the catalyst, and environmentally benign procedure.
摘要:在无溶剂研磨条件下,通过Meldrum's酸、芳香醛和活性亚
甲基化合物(包括
二甲酮或
4-羟基
香豆素)的三组分缩合反应,利用CuI纳米颗粒催化合成了四
氢基
色酮二
酮和二
氢吡喃基
色酮。这种新方法具有简单的反应设置、非常温和的反应条件、高产率生产所需产品而无副产物、
催化剂可回收利用以及环保的优点。