Synthesis of Optically Active Oxazoline Derivatives via Catalytic Asymmetric Desymmetrization of 1,3-Diols
作者:Yutaro Tsuda、Masami Kuriyama、Osamu Onomura
DOI:10.1002/chem.201103800
日期:2012.2.27
oxazolines: A synthetic method to prepare optically active oxazolines through a copper‐catalyzed asymmetric desymmetrization of 1,3‐diols has been successfully developed. This reaction system tolerated a diverse range of substrates to give the desired oxazoline derivatives in good to excellent yields with high enantioselectivities (see scheme).
The enantioselective copper-catalyzed oxidative desymmetrization for the synthesis of chiral α-substituted serine derivatives is reported. The combination of Cu(OTf)2/(R,R)-PhBOX catalyst system, N-bromosuccinimide, and MeOH enables us to provide chiral α-substituted serines from N-2-methylbenzoyl-protected 2-amino-1,3-diols through a simple procedure at room temperature under an air atmosphere. A