Synthetic Study on Tetrapetalones: Stereoselective Cyclization of <i>N</i>-Acyliminium Ion To Construct Substituted 1-Benzazepines
作者:Cheng Li、Xinyu Li、Ran Hong
DOI:10.1021/ol901349b
日期:2009.9.17
The synthesis of the tetracycliccore of complex antibiotic tetrapetalones has been achieved in three steps starting from the simple intermediate γ-hydroxy amide, which can be accessed through a high-yielding six-step sequence. The successful synthesis relies on a novel strategy based on the N-acyliminium ion cyclization.
Synthesis of Substituted Tetrahydroindoloisoquinoline Derivatives via Intramolecular Pd-Catalyzed Alkene Carboamination Reactions
作者:Jeremiah Alicea、John P. Wolfe
DOI:10.1021/jo500470m
日期:2014.5.2
Intramolecular Pd-catalyzed alkene carboamination reactions of substituted 2-allyl-N-(2-bromobenzyl)anilines are described. The substrates for these reactions are generated in two steps from readily available 2-allylanilines and 2-bromobenzaldehyde derivatives. The transformations afford substituted tetrahydroindoloisoquinolines, an uncommon class of fused bicyclic heterocycles, in good yield. The mechanism of these transformations is described, and a model that accounts for the observed product stereochemistry is proposed.