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.