Organocatalytic Michael Addition of Indoles to Isatylidene-3-acetaldehydes: Application to the Formal Total Synthesis of (−)-Chimonanthine
摘要:
A novel strategy for the enantioselective synthesis of 3,3'-disubstituted oxindoles by the organocatalytic Michael addition of indoles to isatylidene-3-acetaldehydes was developed, which can be used for the formal total synthesis of (-)-chimonanthine and the core structure construction of (+)-gliocladin C.
Organocatalytic Michael Addition of Malonates to Isatylidene-3-acetaldehydes: Application to the Total Synthesis of (−)-Debromoflustramine E
作者:Renrong Liu、Junliang Zhang
DOI:10.1002/chem.201300977
日期:2013.6.3
Flustering oxindoles: An enantioselective synthesis of 3,3′‐disubstituted oxindoles by conjugate addition of malonates to isatylidene‐3‐acetaldehydes in high yield and enantioselectivity is developed (see scheme). The synthetic utility of this reaction is demonstrated by the synthesis of three oxindole core structures and the asymmetric total synthesis of debromoflustramine E.