Synthesis of Highly Substituted Cyclobutane Fused-Ring Systems from N-Vinyl β-Lactams through a One-Pot Domino Process
作者:Lawrence L. W. Cheung、Andrei K. Yudin
DOI:10.1002/chem.200902748
日期:2010.4.6
In this contribution, aminocyclobutanes, as well as eight‐membered enamide rings, have been made from N‐vinyl β‐lactams. The eight‐membered products have been formed by a [3,3]‐sigmatropic rearrangement, whereas the aminocyclobutanes have been derived from a domino [3,3]‐rearrangement/6π‐electrocyclisation process. The aminocyclobutanes have been obtained in a highly diastereoselective fashion. The
在此贡献中,氨基环丁烷以及八元烯酰胺环是由N乙烯基β-内酰胺类。八元产物是通过[3,3]-σ重排而形成的,而氨基环丁烷则是从多米诺[3,3]-重排/6π-电环化过程衍生而来的。氨基环丁烷已经以高度非对映选择性的方式获得。即使存在相邻的四元中心,环丁烷环系统也能耐受聚变。包含多达四个稠环的系统很容易获得。通过使用高斯03研究了反应曲线。这项研究表明,氨基环丁烷形成的两个反应途径是可能的。在一种途径中,[3,3]-σ重排是限速步骤,在第二种途径中,电环化是限速步骤。总而言之,这些反应应有助于稠合杂环的构建。