New Simple Hydrophobic Proline Derivatives as Highly Active and Stereoselective Catalysts for the Direct Asymmetric Aldol Reaction in Aqueous Medium
作者:Francesco Giacalone、Michelangelo Gruttadauria、Paolo Lo Meo、Serena Riela、Renato Noto
DOI:10.1002/adsc.200800555
日期:——
different hydrophobic properties of the acyl group were easily synthesized and used as catalysts in the direct asymmetric aldolreaction between cyclic ketones (cyclohexanone and cyclopentanone) and several substituted benzaldehydes. Reactions were carried out using water, this being the best reaction medium examined. Screening of these catalysts showed that compounds bearing the most hydrophobic acyl