The strategy of secondary interaction enables enantioselectivity for homogeneous hydrogenation. By introducing hydrogen bonding of substrates with thiourea from the ligand, α,β-unsaturated carbonyl compounds, such as amides and esters, are hydrogenated with high enantiomeric excess. The substrate scope for this chemical transformation is broad with various substituents at the β-position. Control experiments
二次相互作用的策略使得对映异构体能够进行均相氢化。通过引入来自
配体的
硫脲与底物进行氢键键合,α,β-不饱和羰基化合物(如酰胺和酯)以高对映体过量进行氢化。该
化学转化的底物范围很广,在β位带有各种取代基。对照实验表明,
配体ZhaoPhos的每个单元都是不可替代的。Rh / ZhaoPhos催化的不对称氢化没有观察到非线性效应。