A Highly Efficient, Large-Scale, Asymmetric Direct Aldol Reaction Employing Simple Threonine Derivatives as Recoverable Organocatalysts in the Presence of Water
作者:Chuanlong Wu、Xiangkai Fu、Shi Li
DOI:10.1002/ejoc.201001396
日期:2011.3
A one-step O-acylation of threonine resulted in a simple and readily available threonine-surfactant organocatalyst that could efficiently catalyze the direct asymmetric aldol reactions of cyclic and acyclic ketones with a series of aromatic aldehydes in the presence of water at room temperature with good yields (up to 99 %), diastereoselectivities (up to 99:1), and enantiomeric excesses (>99 %). The