Nonstabilized Azomethine Ylides in the Mannich Reaction: Synthesis of 3,3-Disubstituted Pyrrolidines, Including Oxindole Alkaloids
作者:Evgeny M. Buev、Vladimir S. Moshkin、Vyacheslav Y. Sosnovskikh
DOI:10.1021/acs.joc.7b02193
日期:2017.12.1
situ generated nonstabilized azomethine ylides via the domino Mannich reaction–dipolar cycloaddition to form 3,3-disubstituted pyrrolidines, including oxindole alkaloids. When the starting material possesses a single activated hydrogen, the reaction terminates at the Mannich base stage. The developed methodology was applied to a short and efficientsynthesis of (±)-horsfiline and N-protected (±)-coerulescine