A highly efficient solvent-free asymmetric direct aldol reaction organocatalyzed by recoverable (S)-binam-L-prolinamides. ESI-MS evidence of the enamine-iminium formation.

A highly efficient solvent-free asymmetric direct aldol reaction organocatalyzed by recoverable (S)-binam-L-prolinamides. ESI-MS evidence of the enamine-iminium formation.