从苯酮氧化为芳基乙二醛的三步反应开始,开发了一种无溶剂的合成新型苯并呋喃衍生物的途径。钼酸硫酸催化芳基乙二醛与苯甲酰胺和苯酚的反应,以高收率提供2-芳基-3-苯甲酰胺基苯并呋喃。根据元素分析,IR,1 H NMR和13 C NMR光谱数据指定合成的化合物的结构。本方法具有许多优点,例如无危险的反应条件,简单的操作和后处理程序。
An operationally simple, green and efficient procedure for one‐pot synthesis of novelpolycyclicheteroaromaticcompounds such as benzamidonaphtho[2,1‐b]furans and benzamidobenzo[b]furans has been developed from the reaction of arylglyoxals, benzamide, and phenols. The reactions were mediated with low amounts of yttrium nitrate hexahydrate as a suitable Lewis acid catalyst without using solvent.
通过芳基乙二醛,苯甲酰胺和苯酚的反应,已经开发出一种操作简单,绿色高效的方法,可以一锅合成新型多环杂芳族化合物,如苯甲酰胺基萘并[2,1– b ]呋喃和苯甲酰氨基苯并[ b ]呋喃。在不使用溶剂的情况下,以少量硝酸钇六水合物作为合适的路易斯酸催化剂来介导反应。
Synthesis of a novel class of benzofurans via a three-component, regiospecific intramolecular heterocylization reaction
A new, convenient, and environmentally benign three-component synthesis of a novel class of benzofurans is developed by condensing different arylglyoxals, benzamide, and phenolic substrates under solvent-free conditions. These reactions are catalyzed by tungstate sulfuricacid (TSA) as a safe, clean, and recyclable solid acid. The method is operationally simple and provides access to a variety of 2-aryl-3-benzamido
A one-pot, three-component reaction of arylglyoxals, benzamide and phenols using catalytic amounts of zirconium oxychloride octahydrate under solvent-free conditions produce new amido-substituted benzo[b]furans. The reactions showed chemoselectivity towards benzofuran instead of oxazols which this claim has been confirmed by nuclear magnetic resonance (NMR) and infrared spectroscopy (IR).