A supported palladium nanocatalyst for copper free acyl Sonogashira reactions: One-pot multicomponent synthesis of N-containing heterocycles
作者:Subhankar Santra、Kalyan Dhara、Priyadarshi Ranjan、Parthasarathi Bera、Jyotirmayee Dash、Swadhin K. Mandal
DOI:10.1039/c1gc15869d
日期:——
efficient heterogeneous nanocatalytic system for the copper free acyl Sonogashira reaction. A wide range of ynones was synthesized in high yields under mild reaction conditions. The catalyst was recovered and recycled up to four times. Transmission electron microscopy (TEM) images revealed that the catalyst maintained nanospheric dimensions for four consecutive catalytic cycles. This simple protocol was further
已经开发了一种方便的方法来合成 钯纳米粒子 (PdNP)嵌入到 聚合物基质,PPS [PPS =聚(1,4-亚苯基硫醚)],通过热解醋酸钯。 X射线光电子能谱 (XPS)研究证实,PPS与钯纳米簇之间存在强硫配位。这些钯纳米粒子 (PdNPs-PPS)已被用作无铜的高效多相纳米催化系统 酰基 Sonogashira反应。范围广泛的炔酮在温和的反应条件下以高收率合成了丁二烯。这催化剂被回收并循环使用多达四次。透射电子显微镜(TEM)图像显示催化剂连续四个催化周期保持纳米球尺寸。在一个简单的多锅合成2,4-二取代的多组分合成中进一步探索了这个简单的方案嘧啶类和四氢-β-咔啉衍生物以提高的收率。