Graphene Oxide as a Carbocatalyst for a Diels-Alder Reaction in an Aqueous Medium
作者:Yarabhally R. Girish、Subrata Pandit、Subhendu Pandit、Mrinmoy De
DOI:10.1002/asia.201701072
日期:2017.9.19
six‐membered rings. Herein, we report an efficient protocol for the DA reaction between 9‐hydroxymethylanthracene and N‐substituted maleimides using two‐dimensional graphene oxide (GO) as a heterogeneous carbocatalyst in an aqueous medium at room temperature. High yields, a wide substrate scope, low temperature, excellent functional group tolerance, atom economy, and water as a green solvent are noteworthy
Diels–Alder(DA)反应是[4 + 2]环加成反应,在合成有机化学中非常重要,经常用于合成包含六元环的天然产物。在本文中,我们报告了在室温下使用二维氧化石墨烯(GO)作为非均相碳催化剂在9-羟甲基蒽和N-取代的马来酰亚胺之间进行DA反应的有效方案。高收率,广泛的底物范围,低温,出色的官能团耐受性,原子经济性以及水作为绿色溶剂是该协议的重要功能。该多相GO催化剂可以容易地回收并多次使用,而催化活性没有任何明显的损失。