Highly efficient asymmetric hydrogenation of cyano-substituted acrylate esters for synthesis of chiral γ-lactams and amino acids
作者:Duanyang Kong、Meina Li、Rui Wang、Guofu Zi、Guohua Hou
DOI:10.1039/c5ob02422f
日期:——
A highly efficient and enantioselective synthesis of γ-lactams and γ-amino acids by Rh-catalyzed asymmetric hydrogenation has been developed. Using the Rh-(S,S)-f-spiroPhos complex, under mild conditions a wide range of 3-cyano acrylate esters including both E and Z-isomers and β-cyano-α-aryl-α,β-unsaturated ketones were first hydrogenated with excellent enantioselectivities (up to 98% ee) and high
已经开发了通过Rh催化的不对称氢化的高效和对映选择性的合成γ-内酰胺和γ-氨基酸。使用Rh-(S,S)-f-spiroPhos络合物,在温和条件下,可以得到包括E和Z-异构体以及β-氰基-α-芳基-α,β-不饱和酮在内的各种3-氰基丙烯酸酯。首先以优异的对映选择性(高达98%ee)和高周转率(TON高达10000)进行氢化。