Asymmetric Hydrogenation of α,β-Unsaturated Carboxylic Acids Catalyzed by Ruthenium(II) Complexes of Spirobifluorene Diphosphine (SFDP) Ligands
作者:Xu Cheng、Jian-Hua Xie、Sheng Li、Qi-Lin Zhou
DOI:10.1002/adsc.200606065
日期:2006.7
The ruthenium diacetate complexes ligated by chiral spirobifluorene diphosphines (SFDP) were very effective catalysts for the asymmetric hydrogenation of tiglic acid derivatives and α-methylcinnamic acid derivatives with high activities and excellent enantioselectivities (up to 98 % ee). The α-aryloxybutenoic acids can also be hydrogenated by these catalysts to provide the corresponding saturated α-aryloxybutanoic
由手性螺二芴二膦(SFDP)连接的二乙酸钌络合物是非常有效的催化剂,用于对酸衍生物和α-甲基肉桂酸衍生物进行不对称氢化,具有高活性和出色的对映选择性(最高98%ee)。这些催化剂还可以将α-芳氧基丁烯酸加氢,以提供相应的饱和α-芳氧基丁酸,以高收率(89-93%)和对映选择性(高达95%ee)提供。在该反应中,配体SFDP与对位上的甲基团P -苯基环,得到最好的结果。