Catalytic Asymmetric Hydrogenation of α-CF<sub>3</sub>- or β-CF<sub>3</sub>-Substituted Acrylic Acids using Rhodium(I) Complexes with a Combination of Chiral and Achiral Ligands
作者:Kaiwu Dong、Yang Li、Zheng Wang、Kuiling Ding
DOI:10.1002/anie.201307903
日期:2013.12.23
Only the mixture works! Acrylic acid derivatives with CF3 substituents in α or β position were efficiently hydrogenated in the presence of a RhI complex with a chiral secondary phosphine oxide (SPO; see scheme) and an achiral Ph3P as ligands. The corresponding propanoic acid derivatives were obtained with generally high conversion (>99 %) and high enantioselectivity (92–>99 %).
只有混合物有效!在具有手性仲氧化膦(SPO;参见方案)和非手性Ph 3 P作为配体的Rh I络合物的存在下,在α或β位置具有CF 3取代基的丙烯酸衍生物被有效地氢化。相应的丙酸衍生物通常具有较高的转化率(> 99%)和高的对映选择性(92-> 99%)。