Half-sandwich ruthenium(II) and rhodium(III) complexes bearing chiral amino-phosphoramidite ligands: Synthesis, characterization and application in asymmetric transfer hydrogenation of acetophenone
作者:Carmela Grazia Arena、Angela Cuzzola、Dario Drommi
DOI:10.1016/j.poly.2012.08.066
日期:2012.11
Abstract Cationic (η6-p-cymene) ruthenium(II) and (η5-C5Me5) rhodium(III) complexes containing chiral chelate P,N ligands (1R,2R)-N1-(4,8-di-tert-butyl-2,10-dimethoxydibenzo[d,f][1,3,2]dioxaphosphepin-6-yl)-N1,N2-dialkylcyclohexane-1,2-diamine (alkyl = Me L1, Et L2) have been synthesized and characterized by multinuclear one- and two-dimensional NMR spectroscopy, conductivity measurements, mass spectroscopy
摘要含有手性螯合P,N配体(1R,2R)-N1-(4,8-二叔丁基-合成并表征了2,10-二甲氧基二苯并[d,f] [1,3,2]二氧杂磷酰基-6-基)-N1,N2-二烷基环己烷-1,2-二胺(烷基= Me L1,Et L2)多核一维和二维NMR光谱,电导率测量,质谱和元素分析。在钌配合物[Ru(η6-p-cymene)(κ-P,κ-N)-(L1-L2)Cl] SbF6 1-2的情况下,形成具有S⩾构型的SRu非对映异构体98%。对于铑配合物[Rh(η5-C5Me5)(κ-P,κ-N)-(L1-L2)Cl] SbF6 3-4,螯合过程的立体选择性和配合物的构型稳定性取决于反应条件和氨基氮的N-取代基。