带有α-手性碳中心的旋光中型环状羰基化合物在制药科学和不对称合成中引起人们的兴趣。在本文中,SpinPhox / Ir I催化剂在环外α,β-不饱和环状羰基化合物(包括各种α-亚烷基内酰胺,不饱和环状酮)中的CC键的不对称氢化中被证明具有高度对映选择性。内酯。值得注意的是,该方法可以成功地用于具有六元或七元环的具有挑战性的α-烷基亚内酰胺底物的不对称氢化,从而提供相应的具有α-手性碳中心的旋光羰基化合物,其对映体过量通常非常好(高达ee的98% )。该协议的合成用途还已在抗炎药洛索洛芬及其类似物以及生物学上重要的ε-氨基己酸衍生物的不对称合成中得到证明。
SpinPhox/Iridium(I)-Catalyzed Asymmetric Hydrogenation of Cyclic α-Alkylidene Carbonyl Compounds
作者:Xu Liu、Zhaobin Han、Zheng Wang、Kuiling Ding
DOI:10.1002/anie.201309521
日期:2014.2.10
cyclic carbonyl compounds bearing an α‐chiral carbon center are of interest in pharmaceutical sciences and asymmetric synthesis. Herein, SpinPhox/IrI catalysts have been demonstrated to be highly enantioselective in the asymmetric hydrogenation of the CC bonds in the exocyclicα,β‐unsaturated cyclic carbonyls, including a broad range of α‐alkylidene lactams, unsaturated cyclic ketones, and lactones. It
带有α-手性碳中心的旋光中型环状羰基化合物在制药科学和不对称合成中引起人们的兴趣。在本文中,SpinPhox / Ir I催化剂在环外α,β-不饱和环状羰基化合物(包括各种α-亚烷基内酰胺,不饱和环状酮)中的CC键的不对称氢化中被证明具有高度对映选择性。内酯。值得注意的是,该方法可以成功地用于具有六元或七元环的具有挑战性的α-烷基亚内酰胺底物的不对称氢化,从而提供相应的具有α-手性碳中心的旋光羰基化合物,其对映体过量通常非常好(高达ee的98% )。该协议的合成用途还已在抗炎药洛索洛芬及其类似物以及生物学上重要的ε-氨基己酸衍生物的不对称合成中得到证明。
Optical resolution of (.+-.)-2-(4-(2-oxocyclohexylidenemethyl)phenyl)propionic acid.
作者:Shunji NARUTO、Atsusuke TERADA
DOI:10.1248/cpb.39.190
日期:——
The title compound showed potent anti-inflammatory and analgesic activities. For the determination of pharmacological activity differences between the optical isomers, we resolved the title compound via diastereomeric separation of the (-)-phenylethyl amide derivatives and followed by amide bond cleavege with N2O4. The absolute configurations of the enantiomers were determined by comparison of the optical rotatory dispersion and circular dichroism spectra with those of known optically active 2-phenylpropionic acids.