The Catalyst-Controlled Divergent Cascade Reactions of Homo-Propargylic Amines and Nitrones: Synthesis of Pyrrolo-Isoxazolidines and γ-Lactams
作者:Yuanfang Kong、Yingze Liu、Boyi Wang、Shengli Li、Lingyan Liu、Weixing Chang、Jing Li
DOI:10.1002/adsc.201701476
日期:2018.3.20
Two controllable one‐pot cascade cyclization reactions of homopropargylic amines and nitrones were developed by using different metal Cu and Ag salts. The pyrroloisoxazolidines and γ‐lactams were obtained in good to high yields, respectively. Herein, nitrones played dual roles, both as 1,3‐dipoles and oxidants, and four stereocenters were simultaneously formed in the hydroamination cyclization‐1,3‐dipolar
通过使用不同的金属铜和银盐,开发了两个可控制的一锅级均丙炔胺和硝酮的级联环化反应。吡咯并恶唑烷和γ-内酰胺分别以良好或高收率获得。在此,硝酮起着1,3-偶极子和氧化剂的双重作用,并且在存在AgOAc的情况下,在炔丙基胺和硝酮的加氢环化1,3-偶极环加成级联反应中同时形成了四个立体中心。