Water-Compatible Organocatalysts for Direct Asymmetric <i>syn</i>-Aldol Reactions of Dihydroxyacetone and Aldehydes
作者:S. S. V. Ramasastry、Klaus Albertshofer、Naoto Utsumi、Carlos F. Barbas
DOI:10.1021/ol8002833
日期:2008.4.1
effectively catalyzed the reactions of unprotected or protected dihydroxyacetone with a variety of aldehydes to provide syn-aldol products with good yields and ee values up to >99%. Significantly, this amide catalyst was effective with a variety of nonaromatic aldehyde acceptors that had proven difficult in the presence of other catalysts. Reactions of protected dihydroxyacetone proceeded in aqueous media
开发了一种新型的有机催化剂,该催化剂可有效催化未保护或受保护的二羟基丙酮与各种醛的反应,从而提供具有良好收率和ee值高达> 99%的顺式醛醇产物。重要的是,这种酰胺催化剂对多种非芳族醛受体均有效,这些受体在其他催化剂的存在下被证明是困难的。受保护的二羟基丙酮的反应在水性介质中进行,无需添加有机溶剂。