Asymmetric Synthesis of Chiral 1,3-Diaminopropanols: Bisoxazolidine-Catalyzed CC Bond Formation with α-Keto Amides
作者:Hanhui Xu、Christian Wolf
DOI:10.1002/anie.201105778
日期:2011.12.16
Three high‐yielding steps lead to the formation of chiral 1,3‐diaminopropanols from aliphatic and aromatic α‐keto amides. In this approach, a nitroaldol reaction, which is catalyzed by Cu(SO2CF3)2 and the bisoxazolidine ligand L1, is followed by two mild reduction reactions (see scheme). Laborious protection and deprotection steps can be avoided by using this method.
三个高产步骤导致由脂肪族和芳香族α-酮酰胺形成手性1,3-二氨基丙醇。在这种方法中,由Cu(SO 2 CF 3)2和双恶唑烷配体L1催化的硝基羟醛反应之后是两个温和的还原反应(参见方案)。使用此方法可以避免繁琐的保护和脱保护步骤。