Gholinejad Mohammad, Bonyasi Reza, Najera Carmen, Saadati Fariba, Bahrami Maedeh, Dasvarz Neda
Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), P. O. Box 45195-1159, Gavazang, Zanjan, 45137-66731, Iran.
Research Center for Basic Sciences & Modern Technologies (RBST), Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran.
Chempluschem. 2018 May;83(5):431-438. doi: 10.1002/cplu.201800162.
Gold nanoparticles supported on imidazole-modified bentonite, Bent@Im@Au NPs, has been developed for the first time as an effective heterogeneous catalyst for the synthesis of propargylamines under mild reaction conditions in water at a loading of 0.07 mol % of Au. Various techniques such as X-ray diffraction, high-resolution transmission electron microscopy, Fourier transform infrared spectroscopy, and element mapping by scanning electron microscopy were used to determine the physicochemical properties of the catalysts. The new gold catalyst was found to be highly active providing high to excellent yields of A3 coupling products via the reactions of various aldehydes, having electron-withdrawing as well as electron-donating substituents, with different amines and alkynes. The catalysts can be easily recovered and reused without significant loss of activity and the recycled catalyst was characterized.
负载在咪唑改性膨润土上的金纳米颗粒（Bent@Im@Au NPs）首次被开发为一种有效的多相催化剂，用于在温和反应条件下于水中以0.07 mol %的金负载量合成炔丙胺。采用了各种技术，如X射线衍射、高分辨率透射电子显微镜、傅里叶变换红外光谱以及扫描电子显微镜进行元素映射，以确定催化剂的物理化学性质。发现这种新型金催化剂具有高活性，通过各种具有吸电子和供电子取代基的醛与不同胺和炔烃的反应，能提供高至优异产率的A3偶联产物。该催化剂可以很容易地回收和再利用，而不会显著损失活性，并且对回收的催化剂进行了表征。
