The Stereo-differentiating (Asymmetric) Hydrogenation of the C=O Double Bond with a Modified Nickel Catalyst. XXXV. A Facile Method for the Preparation of Optically Pure β-Diols
作者:Kazuhisa Ito、Tadao Harada、Akira Tai
DOI:10.1246/bcsj.53.3367
日期:1980.11
The hydrogenation of RCOCH2COR over a Raney nickel catalyst modified with a mixture of tartaric acid and NaBr gave (R*, R*-RCH(OH)CH2CH(OH)R selectively with a high optical purity. The substrates with R=CH3–, CH3CH2–, CH3CH2CH2–, CH3(CH2)4CH2–, and Ph– were employed in this study. In all cases, the recrystallization of the hydrogenation product gave an optically pure (R*,R*)-isomer which was free from the (R*,S*)-isomer.
在改性了酒石酸和NaBr混合物的Raney镍催化剂上,对RCOCH2COR进行氢化反应,得到了光学纯度较高的(R*, R*-RCH(OH)CH2CH(OH)R选择性产物。该研究中使用的底物包括R=CH3–、CH3CH2–、CH3CH2CH2–、CH3(CH2)4CH2–以及Ph–。在所有情况下,氢化产物的再结晶得到的都是光学纯的(R*,R*)-异构体,且不含(R*,S*)-异构体。