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 domino Mannich/aza-Michael reaction 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
已经实现了γ-丙二酸酯取代的α,β-不饱和酯与N-保护的芳基醛亚胺的多米诺曼尼奇/氮杂-迈克尔反应。在双官能硫脲的催化下,可获得2,5-顺式多取代吡咯烷类化合物,收率良好至优异(76-99%),对映选择性(75-94%)和出色的非对映选择性(de > 95%)。可以通过结晶和除去外消旋物获得纯的立体异构体。