Asymmetric Hydrogenation of β-Aryl Alkylidene Malonate Esters: Installing an Ester Group Significantly Increases the Efficiency
作者:Qian-Kun Zhao、Xiong Wu、Lin-Ping Li、Fan Yang、Jian-Hua Xie、Qi-Lin Zhou
DOI:10.1021/acs.orglett.1c00093
日期:2021.3.5
practical method for efficient asymmetric hydrogenation of β-aryl alkylidene malonates. With a site-specifically tailored chiral spiro iridium catalyst, a series of β-aryl alkylidene malonate esters were hydrogenated to afford chiral malonate esters with good to excellent enantioselectivities (up to 99% ee) and high turnover numbers (up to 19000). The results showed that installing an ester group in α,β-unsaturated
在此,我们报告了一种有效的不对称氢化β-芳基亚烷基丙二酸酯的实用方法。使用针对特定位置的手性螺铱铱催化剂,一系列β-芳基亚烷基丙二酸酯被氢化,得到手性丙二酸酯,具有良好的对映体选择性(高达99%ee)和高周转率(高达19000)。结果表明,在α,β-不饱和羧酸酯中安装酯基显着提高了其不对称氢化反应的效率。