Development of ProPhenol Ligands for the Diastereo- and Enantioselective Synthesis of β-Hydroxy-α-amino Esters
作者:Barry M. Trost、Frédéric Miege
DOI:10.1021/ja4129394
日期:2014.2.26
aldol reaction between glycine Schiff bases and aldehydes is reported. The design and synthesis of new ProPhenol ligands bearing 2,5-trans-disubstituted pyrrolidines was essential for the success of this process. The transformation operates at room temperature and affords syn β-hydroxy-α-amino esters in high yields with good to excellent levels of diastereo- and enantioselectivity.
据报道,锌-苯酚催化甘氨酸席夫碱和醛之间的直接不对称醛醇反应。带有 2,5-反式二取代吡咯烷的新 ProPhenol 配体的设计和合成对于该过程的成功至关重要。该转化在室温下进行,并以高产率提供顺式 β-羟基-α-氨基酯,并具有良好至极好的非对映选择性和对映选择性。