Asymmetric Synthesis of Polyfunctionalized Pyrrolidines via a Thiourea Catalyzed Domino Mannich/Aza-Michael Reaction
作者:Dieter Enders、Dominik P. Göddertz、Christian Beceño、Gerhard Raabe
DOI:10.1002/adsc.201000658
日期:2010.11.22
The dominoMannich/aza-Michaelreaction of γ-malonate-substituted α,β-unsaturated esters with N-protected arylaldimines has been achieved. Catalyzed by bifunctional thioureas, 2,5-cis-configured polysubstituted pyrrolidines are obtained in good to excellent yields (76–99%), enantioselectivities (75–94%) and excellent diastereoselectivities (de >95%). The pure stereoisomers are available by crystallization