ASYMMETRIC SYNTHESIS OF 3-ALKYLSUCCINALDEHYDIC ACID METHYL ESTERS

Abstract
The highly stereoselective Michael addition was achieved by treating an aminal, prepared from (S)-2-(anilinomethyl)pyrrolidine and fumaraldehydic acid methyl ester, with the Grignard reagents. 3-Alkylsuccinaldehydic acid methyl esters were obtained with high enantiomeric excesses by the hydrolysis of the resulting aminals.