Recyclable heterogeneous gold(I)-catalyzed oxidation of internal acylalkynes: Practical access to vicinal tricarbonyls
作者:Wenli Hu、Bin Huang、Bingbo Niu、Mingzhong Cai
DOI:10.1016/j.tetlet.2021.152953
日期:2021.3
A highly efficient heterogeneous gold(I)-catalyzed oxidation of internal acylalkynes has been developed using 2,6-dichloropyridine N-oxide as the oxidant in dichloromethane (CH2Cl2) at room temperature, providing a novel and practical approach for the construction of diverse vicinal tricarbonyls such as α,β-diketoesters, 1,2,3-triketones, and α,β-diketoamides in good to excellent yields. The heterogeneous
在室温下,使用2,6-二氯吡啶N-氧化物作为二氯甲烷(CH 2 Cl 2)的氧化剂,开发了一种高效的异质金(I)催化内部酰基炔烃氧化的方法,为构建该结构提供了一种新颖而实用的方法种类繁多的邻位三羰基化合物,如α,β-二酮酸酯,1,2,3-三酮和α,β-二酮酰胺,收率良好。可以通过简单的制备方法容易地从市售试剂中获得非均相金(I)催化剂,并通过过滤反应混合物进行回收并重复使用多达七次,而不会显着降低催化效率。