Amidation via ligand-free direct oxidative C(sp3)-H/NH coupling with Cu-CPO-27 metal-organic framework as a recyclable heterogeneous catalyst
作者:Thanh T. Hoang、Hanh T.H. Nguyen、Tien T. Le、Dung T. Le、Thanh Truong、Nam T.S. Phan
DOI:10.1016/j.tet.2016.10.059
日期:2016.12
A copper-based metal-organicframework Cu-CPO-27 was synthesized, and used as a recyclablecatalyst for the amidation of unactivated alkanes by benzamides via direct oxidative C(sp3)-H/NH coupling under ligand-free conditions. Using a catalytic amount of the Cu-CPO-27 for the transformation, high yields of N-cyclohexyl benzamides were achieved. The Cu-CPO-27 was more catalytically active than other
合成了铜基金属有机骨架Cu-CPO-27,并用作可再循环的催化剂,用于在无配体条件下通过直接氧化C(sp 3)-H / N H偶联作用使苯甲酰胺酰胺化未活化的烷烃。使用催化量的Cu-CPO-27进行转化,获得了高产率的N-环己基苯甲酰胺。Cu-CPO-27比其他Cu-MOF更具催化活性,例如Cu 3(BTC)2,Cu(BDC),Cu(EDB),Cu 2(BPDC)2(BPY),Cu 2(BDC)2(DABCO)和Cu 2(EDB)2(BPY)。与包括Cu(OAc)2,CuCl 2,CuBr,CuI,CuCl,Cu(NO 3)2和CuSO 4的几种铜基盐相比,Cu-CPO-27也表现出优势。Cu-CPO-27催化剂可重复使用多次进行酰胺化转化,而其催化活性并未明显降低。据我们所知,苯甲酰胺通过直接氧化的C(sp 3)-H / N H偶合反应对未活化的烷烃进行酰胺化反应以前并未在非均相催化条件下进行。