Stereoselective Synthesis of 4-Substituted Cyclic Sulfamidate-5-Phosphonates by Using Rh-Catalyzed, Asymmetric Transfer Hydrogenation with Accompanying Dynamic Kinetic Resolution
作者:Yeon Ji Seo、Jin-ah Kim、Hyeon-Kyu Lee
DOI:10.1021/acs.joc.5b01434
日期:2015.9.4
asymmetric transfer hydrogenation of 4-substituted cyclic sulfamidate imine-5-phosphonates produces the corresponding cyclic sulfamidate-5-phosphonates. The process employs a HCO2H/Et3N mixture as the hydrogen source and the chiral Rh catalysts, (R,R)- or (S,S)-Cp*RhCl(TsDPEN), and it takes place at room temperature within 1 h with high yields and high levels of stereoselectivity.
由动态动力学拆分驱动的4-取代的环状氨基磺酸亚胺-5-膦酸酯的不对称转移氢化反应生成了相应的环状氨基磺酸5-膦酸酯。该方法使用HCO 2 H / Et 3 N混合物作为氢源和手性Rh催化剂((R,R)-或(S,S)-Cp * RhCl(TsDPEN) 1 h具有高收率和高水平的立体选择性。