Metal–Ligand Cooperative Approach To Achieve Dehydrogenative Functionalization of Alcohols to Quinolines and Quinazolin-4(3<i>H</i>)-ones under Mild Aerobic Conditions
作者:Siuli Das、Suman Sinha、Deepannita Samanta、Rakesh Mondal、Gargi Chakraborty、Paula Brandaõ、Nanda D. Paul
DOI:10.1021/acs.joc.9b01343
日期:2019.8.16
under relatively mild reaction conditions (≤90 °C) is reported. Simple and easy-to-prepare air-stable Cu(II) complexes featuring redox-active azo-aromatic scaffolds, 2-arylazo-(1,10-phenanthroline) (L1,2), are used as catalyst. A wide variety of substituted quinolines and quinazolin-4(3H)-ones were synthesized in moderate to good isolated yields via dehydrogenative coupling reactions of various inexpensive
报道了一种在相对温和的反应条件下(≤90°C)将醇脱氢官能化为各种取代的喹啉和喹唑啉-4(3 H)-的简单的金属-配体协同方法。简单和易于制备空气稳定的Cu(II)配合物配有氧化还原活性的偶氮芳族骨架,2- arylazo-(1,10-菲咯啉)(大号1,2)被用作催化剂。各种各样的取代喹啉和喹唑啉-4(3 H通过好氧条件下各种廉价且容易获得的起始原料的脱氢偶联反应,以中等至良好的分离产率合成了1-酮。进行了一些控制实验和氘标记研究,以了解脱氢偶联反应的机理,这表明铜和配位的偶氮-芳族配体在催化循环中均以协同方式参与。