Intramolecular Aminyl and Iminyl Radical Additions to α,β-Unsaturated Esters. Diastereoselective Tandem Cyclofunctionalization and Hydrogen Transfer Reactions
作者:Yvan Guindon、Brigitte Guérin、Serge R. Landry
DOI:10.1021/ol0160809
日期:2001.7.1
[reaction: see text] A tandem process featuring intramolecular aminyl radical cyclofunctionalization and hydrogen transfer affords 2,3-trans-disubstituted pyrrolidines with anti or syn diastereoselectivity. The extension of this strategy to iminyl radicals gives trans-anti pyrrolenines with high levels of 1,2-induction in both steps of the tandem process.
[反应:见正文]以分子内氨基自由基环官能化和氢转移为特征的串联过程可提供具有反或非对映选择性的2,3-反式-二取代的吡咯烷。该策略扩展至亚氨基自由基使在串联过程的两个步骤中反式反吡咯啉均具有较高的1,2-诱导水平。