Asymmetric Binary Acid Catalysis: Switchable Enantioselectivity in Enantioselective Conjugate Hydride Reduction
作者:Man Wang、Ran Song、Daoshan Yang、Jian Lv
DOI:10.1021/acs.orglett.2c04087
日期:2023.1.20
exchange of the metal ion from Zr(IV) to Fe(III) leads to a switch in the enantioselectivity of binary acid-catalyzed conjugate hydride reductions. In the presence of Hantzsch ester, γ-indolyl β,γ-unsaturated α-keto esters could be reduced to the desired (S)- or (R)-products, respectively, with good to excellent enantioselectivity (up to 98% ee).
金属离子从 Zr(IV) 到 Fe(III) 的交换导致二元酸催化的共轭氢化物还原的对映选择性发生变化。在 Hantzsch 酯存在下,γ-吲哚基 β,γ-不饱和 α-酮酯可以分别还原为所需的 ( S )- 或 ( R )- 产物,具有良好至优异的对映选择性(高达 98% ee) .