Highly Substituted Furo[3,4-<i>c</i>]azepines by Gold(I)-Catalyzed Diastereoselective Tandem Double Heterocyclizations and 1,2-Alkyl Migration
作者:Hongyin Gao、Xiaoli Zhao、Yihua Yu、Junliang Zhang
DOI:10.1002/chem.200901813
日期:2010.1.11
Rapid access to heterobicycles: A novel cationic gold(I)‐catalyzed tandem heterobicyclization and 1,2‐alkyl migration was developed, which provides a rapid, efficient, and stereoselective access to highly substituted furo[3,4‐c]azepines from simple, readily available 2‐(1‐alkynyl)‐2‐alken‐1‐ones and α,β‐unsaturated imines under mild conditions (see scheme). In contrast, when heteroaryl imines were
快速访问杂环自行车:开发了一种新型的阳离子金(I)催化的串联异双环化和1,2-烷基迁移,可从简单的方法快速,高效且立体选择性地访问高度取代的呋喃[3,4- c ]氮杂环庚烷,在温和条件下容易获得的2-(1-炔基)-2-烯键-1-酮和α,β-不饱和亚胺(参见方案)。相反,当使用杂芳基亚胺时,仅形成直接的正式的[4 + 3]环加合物。