Synthesis of <i>N</i>-Vinyl Cinnamaldehyde Nitrones through Atropisomeric Quinoxaline-Derived <i>N</i>,<i>N</i>,<i>O</i>-Ligand-Promoted Chan-Lam Reaction
作者:Hao Chen、Cui Wei、Guang-Li Pang、Cui Liang、Dong-Liang Mo、Xiao-Pan Ma
DOI:10.1021/acs.orglett.2c02288
日期:2022.8.19
A type of quinoxaline-derived tridentate N,N,O-ligand was synthesized in good to excellent yields over three steps through iodination of 2-aryl indoles, sequential Kornblum-type oxidation with DMSO, and capture by 1,2-diaminobenzenes. The prepared atropisomeric N,N,O-ligand was successfully applied in the synthesis of N-vinyl cinnamaldehyde nitrones as only Z-isomers in good yields through the Chan-Lam
通过 2-芳基吲哚的碘化、DMSO 的连续 Kornblum 型氧化和 1,2-二氨基苯的捕获,通过三个步骤以良好至优异的产率合成了一种喹喔啉衍生的三齿N、N、O-配体。所制备的阻转异构体N , N , O-配体通过Chan-Lam反应成功地用于合成N-乙烯基肉桂醛硝酮作为Z-异构体,收率良好。该方法具有易于获得的可调三齿N、N、O-配体、底物范围广、官能团耐受性好、高N-乙烯基硝酮的Z-异构体。