The use of two optically active N-sulfinyl α-imino esters in the stereoselective aza-Diels–Alder reaction
作者:Trygve Andreassen、Marianne Lorentzen、Lars-Kristian Hansen、Odd R. Gautun
DOI:10.1016/j.tet.2009.01.090
日期:2009.4
Diastereoselective aza-Diels–Alder (aza-DA) reactions of ethyl (S)-N-(tert-butanesulfinyl)iminoacetate (2a) and ethyl (S)-N-(p-toluenesulfinyl)iminoacetate (2b) with different dienes including activated, non-activated, cyclic, and acyclic dienes in the presence of Lewis acids are described. Reactions with 2a were found to be more selective. Reactions of unactivated dienes (acyclic and cyclic) with