Water-soluble chiral monosulfonamide-cyclohexane-1,2-diamine-RhCp∗ complex and its application in the asymmetric transfer hydrogenation (ATH) of ketones
作者:Norma A. Cortez、Gerardo Aguirre、Miguel Parra-Hake、Ratnasamy Somanathan
DOI:10.1016/j.tetlet.2007.04.116
日期:2007.6
Monosulfonamide ligands with heteroatom/heterocyclic systems were derived from trans-(1R,2R)-cyclohexane-1,2-diamine and complexed with [Ru(benzene)Cl2]2, [Cp∗RhCl2]2 in situ and used in the ATH of aromatic ketones with aqueous sodium formate as the hydrogen source. The chiral secondary alcohols were obtained with >93% enantioselectivity and >89% yield. Reduction in water was faster than in isopropanol/KOH
具有杂原子/杂环系统的单磺酰胺配体衍生自反式-(1 R,2 R)-环己烷-1,2-二胺,并与[Ru(苯)Cl 2 ] 2,[Cp ∗ RhCl 2 ] 2原位复合,用于以甲酸钠水溶液为氢源的芳香族酮的ATH。以> 93%的对映选择性和> 89%的产率获得手性仲醇。水中的还原比异丙醇/ KOH中的还原更快。表面活性剂的添加显示很少或没有效果。