Organocatalytic Tandem Reaction to Construct Six-Membered Spirocyclic Oxindoles with Multiple Chiral Centres through a Formal [2+2+2] Annulation
作者:Kun Jiang、Zhi-Jun Jia、Shi Chen、Li Wu、Ying-Chun Chen
DOI:10.1002/chem.200903009
日期:——
oxindoles has been successfully developed through a formal [2+2+2] annulation strategy. The amine‐catalysed stereoselective Michael addition of aliphatic aldehydes to electron‐deficient olefinic oxindole motifs gave chiral C3 components, which were further combined with diverse electrophiles (activated olefins or imines) to afford spirocyclic oxindoles with versatile molecular complexity (up to six contiguous
通过正式的[2 + 2 + 2]环空策略已成功开发了一种有效的串联反应,用于不对称合成六元螺环氧吲哚。胺催化的脂肪族醛的胺选择性立体选择性迈克尔加成至缺电子的烯属羟吲哚基序后,得到手性C3组分,再与各种亲电试剂(活化的烯烃或亚胺)结合,得到具有多种分子复杂性的螺环羟吲哚(最多六个连续的立体异构中心) ,高非对映和对映选择性)。