Copper(II)-Catalyzed Synthesis of Pyrazinones from α-Azido-N-allylamides under an Oxygen Atmosphere
作者:Shunsuke Chiba、Line Zhang、Jian-Yuan Lee、Naomi Yamazaki
DOI:10.1055/s-0030-1261185
日期:2011.9
A copper(II)-catalyzed reaction of α-azido-N-allylamide synthetic under an oxygen atmosphere resulted in the formation of 2-formyl pyrazinones. The present transformation was characterized by the following steps: 1) 1,3-dipolar cycloaddition of the azido part onto the intramolecular alkene to give bicyclic aziridine intermediates; 2) further copper(II)-catalyzed oxygenation-oxidation of the aziridines
在氧气氛下铜(II)催化的α-叠氮基-N-烯丙基酰胺合成反应导致2-甲酰基吡嗪酮的形成。该转化的特征在于以下步骤:1)叠氮基部分的1,3-偶极环加成到分子内烯烃上,得到双环氮丙啶中间体。2)进一步的铜(II)催化的氮丙啶的氧化-氧化,得到2-甲酰基吡嗪酮。 吡嗪酮-有机叠氮化物-1,3-偶极环加成-铜-氧