Heck and oxidative boron Heck reactions employing Pd(II) supported amphiphilized polyethyleneimine‐functionalized MCM‐41 (MCM‐41@aPEI‐Pd) as an efficient and recyclable nanocatalyst
作者:Seyed Farshad Motevalizadeh、Masoumeh Alipour、Fatemeh Ashori、Alireza Samzadeh‐Kermani、Hosein Hamadi、Mohammad Reza Ganjali、Hamideh Aghahosseini、Ali Ramazani、Mehdi Khoobi、Elham Gholibegloo
DOI:10.1002/aoc.4123
日期:2018.3
MCM‐41@PEI‐dodecane and the resulted MCM‐41@aPEI‐Pd nanocatalyst was characterized by FT‐IR, TEM, ICP‐AES and XPS. Our designed nanocatalyst with a distinguished core‐shell structure and Pd2+ ions as catalytic centers was explored as an efficient and recyclable catalyst for Heck and oxidative boron Heck coupling reactions. In Heck coupling reaction, the catalytic activity of MCM‐41@aPEI‐Pd in the presence of triethylamine
基于MCM-41与聚乙烯亚胺(PEI)的共价表面官能化,基于[3-(2,3-环氧丙氧基)丙基]三甲氧基硅烷(EPO)作为交联剂,开发了一种新型纳米催化剂。然后将MCM-41表面的胺官能团与碘十二烷共轭,使催化剂具有两亲性质。钯(II)最终被固定在MCM-41 @ PEI-十二烷上,并通过FT-IR,TEM,ICP-AES和XPS对所得的MCM-41 @ aPEI-Pd纳米催化剂进行了表征。我们设计的纳米催化剂具有出色的核壳结构和Pd 2+离子作为催化中心被研究为Heck和氧化硼Heck偶联反应的一种有效且可回收的催化剂。在Heck偶联反应中,以三乙胺为碱的MCM-41 @ aPEI-Pd的催化活性导致很高的收率和选择性。同时,在香豆素的C-4区域选择性芳基化中,通过直接C-H活化研究了MCM-41 @ aPEI-Pd作为第一种半均相钯催化剂,对不同的官能团获得了中等至优异的收率。浸出试验表明,MCM-41