ligands were designed and synthesized. The rhodium complexes with the ligands were applied to the asymmetric transfer hydrogenation of broad range of long-chained aliphatic ketoesters in neat water. Quantitative conversion and excellent enantioselectivity (up to 99% ee) was observed for α-, β-, γ-, δ- and ε-ketoesters as well as for α- and β-acyloxyketone using chiral surfactant-type catalyst 2. The CH/π
设计并合成了一系列两亲性
配体。具有
配体的
铑配合物被用于纯
水中宽范围的长链脂族
酮酸酯的不对称转移氢化。使用手性表面活性剂型催化剂2观察到α-,β-,γ-,δ-和ε-
酮酸酯以及α-和β-酰氧基酮的定量转化率和出色的对映选择性(高达99%ee)。在
金属
硅油核中,催化剂与底物之间的长脂肪链之间的CH /π相互作用和长脂肪链的强疏
水相互作用在催化过渡态中起着关键作用。胶束中
金属催化位点与核心的疏
水微环境之间的协同作用有助于实现高立体选择性。