Nickel-Catalyzed Denitrogenative Annulation Reactions of 1,2,3-Benzotriazin-4(3<i>H</i>)-ones with 1,3-Dienes and Alkenes
作者:Tomoya Miura、Masao Morimoto、Motoshi Yamauchi、Masahiro Murakami
DOI:10.1021/jo1008756
日期:2010.8.6
1,2,3-Benzotriazin-4(3H)-ones react with 1,3-dienes in the presence of a nickel(0)/phosphine complex to give a variety of 3,4-dihydroisoquinolin-1(2H)-ones. Oxidative insertion of nickel(0) into the triazinone moiety prompts extrusion of dinitrogen to give a five-membered ring azanickelacyclic intermediate. Subsequent insertion of 1,3-dienes into the nickel−carbon bond followed by allylic amidation
1,2,3-Benzotriazin-4(3 H)-ones在镍(0)/膦复合物存在下与1,3-二烯反应生成各种3,4-dihydroisoquinolin-1(2 H) -那些。镍(0)氧化插入三嗪酮部分会促使二氮挤出,从而形成五元环的氮杂氮杂环中间体。随后将1,3-二烯插入镍-碳键,然后进行烯丙基酰胺化反应,得到3,4-二氢异喹啉-1(2 H)-one。烯烃也经历插入到五元环氮杂氮杂环中间体中,并且随后的还原消除得到3-取代的3,4-二氢异喹啉-1(2 H)-one。