Dynamic Kinetic Resolution Based Asymmetric Transfer Hydrogenation of α-Alkoxy-β-Ketophosphonates. Diastereo- and Enantioselective Synthesis of Monoprotected 1,2-Dihydroxyphosphonates
作者:Se-Mi Son、Hyeon-Kyu Lee
DOI:10.1021/jo500148j
日期:2014.3.21
Dynamic kinetic resolution driven, asymmetric transfer hydrogenation reactions of a wide range of 2-substituted α-alkoxy-β-ketophosphonates 3 were observed to proceed efficiently to give the corresponding 2-substituted α-alkoxy-β-hydroxy phosphonates 4 with excellent levels of diastereo- and enantioselectivity. These processes are promoted by using well-defined, commercially available, chiral transition
观察到由动态动力学拆分驱动的各种2-取代的α-烷氧基-β-酮膦酸酯3的不对称转移氢化反应有效地进行,得到了相应的2-取代的α-烷氧基-β-羟基膦酸酯4。非对映和对映选择性。通过使用定义明确的可商购的手性过渡金属催化剂以及甲酸和三乙胺的0.2:1混合物作为氢源和溶剂,可以促进这些过程。