Functionalized chiral carbazolones with α‐quaternary carbon centers are formed through the ligand‐controlled Pd‐catalyzed enantioselective decarboxylative allylicalkylation of carbazolones (see scheme). This catalyticasymmetric reaction was employed as the key step in the total synthesis of aspidospermidine and (+)‐kopsihainanine A.
Enantioselective Palladium-Catalyzed Decarboxylative Allylation of Carbazolones and Indolones: Formal Synthesis of (+)-Kopsihainanine A
作者:Christopher J. Gartshore、David W. Lupton
DOI:10.1002/anie.201209069
日期:2013.4.8
Adding value: A four‐step synthesis of enantioenriched carbazolone and indolone derivatives has been developed using an enantioselective Pd‐catalyzeddecarboxylativeallylation. The scope of this reaction is broad, and the materials are suited for natural product synthesis, shown with the completion of a formalsynthesis of (+)‐kopsihainanine (see scheme).