Mild direct amination of benzoxazoles using interpenetrating Cobalt(II)-based metal-organic framework as an efficient heterogeneous catalyst
作者:Sheng-Chun Chen、Nan Li、Feng Tian、Nan-Nan Chai、Ming-Yang He、Qun Chen
DOI:10.1016/j.mcat.2018.03.011
日期:2018.5
activity toward the direct amination of 5-methylbenzoxazoles with TBHP as oxidant and acetic acid as an additive under mild reaction conditions, and various 2-aminobenzoxazoles were synthesized in moderate to good yields under optimized reaction conditions. Furthermore, the Co-MOF catalyst could be easily recovered and reused several times without loss of its crystallinity and activity.
基于酸碱混合配体组装策略,酸和碱稳定的新型钴(II)金属有机骨架[Co(tcpa)(Fbtx)(H 2 O)2 ]·0.5H 2 O} n(表示为Co-MOF,Fbtx = 1,4-双(1,2,4-三唑-1-基甲基)-2,3,5,6-四氟苯,H 2 tcpa = 3,4,5,6 -四氯邻苯二甲酸)是在水热条件下合成的,并通过各种光谱和分析技术进行了表征。单晶X射线衍射分析显示Co-MOF具有罕见的三维二维互穿cds类型的框架。结晶Co-MOF在温和的反应条件下,以TBHP为氧化剂和乙酸为添加剂,对5-甲基苯并恶唑的直接胺化表现出优异的活性,在优化的反应条件下以中等至良好的收率合成了各种2-氨基苯并恶唑。此外,Co-MOF催化剂可以容易地回收并重复使用几次,而不会损失其结晶度和活性。