Ring-Opening Metathesis Polymerization-based Recyclable Magnetic Acylation Reagents
作者:Quirin M. Kainz、Roland Linhardt、Pradip K. Maity、Paul R. Hanson、Oliver Reiser
DOI:10.1002/cssc.201200453
日期:2013.4
simple method for the acylation of amines utilizing carbon‐coated metal nanoparticles as recyclable supports is reported. Highly magnetic carbon‐coated cobalt (Co/C) and iron (Fe/C) nanobeads were functionalized with a norbornene tag (Nb‐tag) through a “click” reaction followed by surface activation employing Grubbs‐II catalyst and subsequent grafting of acylated N‐hydroxysuccinimide ROMPgels (ROMP=ring‐opening
据报道,一种操作简单的方法是利用碳包覆的金属纳米颗粒作为可循环利用的载体来酰化胺。高磁性碳包覆的钴(Co / C)和铁(Fe / C)纳米珠通过“点击”反应通过降冰片烯标签(Nb-tag)功能化,然后使用Grubbs-II催化剂进行表面活化,然后接枝酰化N-羟基琥珀酰亚胺ROMPgels(ROMP =开环复分解聚合)。高负荷(高达2.6 mmol g -1杂化材料用于各种伯胺和仲胺的酰化反应。在快速倾析和简单蒸发溶剂后,分离出的产品具有高收率(86-99%)和出色的纯度(通过NMR光谱均大于95%)。废树脂成功地被酰氯,酸酐和羧酸重新酰化,并可以连续使用多达五个周期,而活性却没有显着降低。