14398-95-9Relevant articles and documents
Nonstabilized Azomethine Ylides in the Mannich Reaction: Synthesis of 3,3-Disubstituted Pyrrolidines, Including Oxindole Alkaloids
Buev, Evgeny M.,Moshkin, Vladimir S.,Sosnovskikh, Vyacheslav Y.
, p. 12827 - 12833 (2017/12/08)
Active methylene compounds react with in 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 efficient synthesis of (±)-horsfiline and N-protected (±)-coerulescine.