Organocatalytic Synthesis of Spiro[pyrrolidin-3,3′-oxindoles] with High Enantiopurity and Structural Diversity
作者:Xiao-Hua Chen、Qiang Wei、Shi-Wei Luo、Han Xiao、Liu-Zhu Gong
DOI:10.1021/ja905302f
日期:2009.9.30
diversity is described. The asymmetriccatalytic three-component 1,3-dipolarcycloaddition of a broad range of methyleneindolinones with aldehydes and amino esters in the presence of chiral phosphoric acid provides spirooxindole derivatives in high yield with unusual regiochemistry and excellent stereoselectivities (up to 98% ee) under mild conditions. The straightforward construction of spirooxindole skeletons