Catalysts for the asymmetric transfer hydrogenation of various ketones from [3-[(2S)-2-[(diphenylphosphanyl)oxy]-3-phenoxypropyl]-1-methyl-1H-imidazol-3-ium chloride] and [Ru(η6-arene)(μ-Cl)Cl]2, Ir(η5-C5Me5)(μ-Cl)Cl]2 or [Rh(μ-Cl)(cod)]2
作者:Nermin Meriç、Nevin Arslan、Cezmi Kayan、Khadichakhan Rafikova、Alexey Zazybin、Aygul Kerimkulova、Murat Aydemir
DOI:10.1016/j.ica.2019.04.016
日期:2019.6
-imidazol-3-ium chloride] with [Ru(η6-arene)(μ-Cl)Cl]2, Ir(η5-C5Me5)(μ-Cl)Cl]2 or [Rh(μ-Cl)(cod)]2, in the presence of KOH/isoPrOH, has been found to generate catalysts that are capable of enantioselectively reducing alkyl, aryl ketones to the corresponding (R)-alcohols. Under optimized conditions, when the catalysts were applied to the asymmetric transfer hydrogenation, we obtained the secondary alcohol
摘要[3-[(2S)-2-[(二苯基膦烷基)氧基] -3-苯氧基丙基] -1-甲基-1H-咪唑-3-氯化铵]与[Ru(η6-芳烃)(μ-发现在KOH / isoPrOH的存在下,Cl)Cl] 2,Ir(η5-C5Me5)(μ-Cl)Cl] 2或[Rh(μ-Cl)(cod)] 2生成的催化剂具有对映选择性地将烷基,芳基酮还原为相应的(R)-醇的能力。在最佳条件下,将催化剂应用于不对称转移氢化反应时,仅使用0.5摩尔%的催化剂负载量,我们就可以得到高转化率和对映选择性的仲醇产品。另外,[3-[(2S)-2-[(氯(ɳ4-1,5-环辛二烯)铑)二苯基膦基]氧基} -3-苯氧基丙基] -1-甲基-1H-咪唑-3-基氯化物],(6)配合物在转移氢化中的活性比其他类似配合物高得多。