Understanding the efficacy of<i>N,N</i>-dimethylformamide and oxalyl chloride combination as chemoselective<i>O</i>-formylating agent: An unified experimental and theoretical study
作者:Shaikh Batuta、Md. Ashif Ali、Anirban Chatterjee、Md. Niharul Alam、Sreeparna Das、Debabrata Mandal、Naznin Ara Begum
DOI:10.1080/00397911.2016.1168450
日期:2016.4.17
efficient synthetic protocol for the O-formylation of a wide range of aromatic hydroxyl/phenolic substrates using an N,N-dimethylformamide (DMF) and oxalyl chloride [(COCl)2] combination in dichloromethane (DCM) as solvent at ambient temperature. The DMF/(COCl)2 combination was found to be highly chemoselective for the aromatic/phenolic hydroxyl group over aliphatic hydroxyl or aromatic amine/thiol
摘要 我们开发了一种简单但有效的合成方案,用于在二氯甲烷 (DCM) 中使用 N,N-二甲基甲酰胺 (DMF) 和草酰氯 [(COCl)2] 组合对各种芳香羟基/酚类底物进行 O-甲酰化在环境温度下作为溶剂。发现 DMF/(COCl)2 组合对芳香族/酚羟基的化学选择性高于脂肪族羟基或芳香胺/硫醇基团。基于实验和基于密度泛函理论的理论研究结果解释了 DMF/(COCl)2 组合对芳香醇 O-甲酰化的这种化学选择性。图形概要