首页> 外文期刊>Organometallics >An eta~2-Aryl- Metal Interaction Turns a Chiral Monodentate Phosphoramidite into a Chelating Ligand in (S_a,S_(Ru),R_C,R_C)-[RuCl(eta~6-p-cymene) O,O-(1,1'-dinaphthyl-2,2'-diyl)-N-(1-(1,2-eta-1-naphthyl)ethyl)-N-(1-(1-naphthyl)ethyl)phosphoramidite-k
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An eta~2-Aryl- Metal Interaction Turns a Chiral Monodentate Phosphoramidite into a Chelating Ligand in (S_a,S_(Ru),R_C,R_C)-[RuCl(eta~6-p-cymene) O,O-(1,1'-dinaphthyl-2,2'-diyl)-N-(1-(1,2-eta-1-naphthyl)ethyl)-N-(1-(1-naphthyl)ethyl)phosphoramidite-k

机译:η〜2-芳基金属相互作用将手性单齿亚磷酰胺转变为(S_a,S_(Ru),R_C,R_C)-[RuCl(eta〜6-p-cymene)O,O-(1, 1'-二萘基-2,2'-二基)-N-(1-(1,2-eta-1-萘基)乙基)-N-(1-(1-萘基)乙基)亚磷酰胺-k

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摘要

Chloride abstraction from the half-sandwich complex [RuCl_2(eta~6-p-cymene)(1-kappaP)] (2; 1=(S_a,R_C,R_C)-O,O'-(1,1'-dinaphthyl-2,2'-diyl)-N,N-bis(1-(1-naphthyl)-ethyl)phosphoramidite) with TlPF_6 or (Et_3O)PF_6 gives the cationic,18-electron complex (S_a,S_(Ru),R_C,R_C)-[RuCl-(eta~6-p-cymene)(O,O'-(1,1'-dinaphthyl-2,2'-diyl)-N-(1-(1,2-eta-1-naphthyl)ethyl)-N-(1-(1-naphthyl)ethyl)phosphora-midite-kappaP)]PF_6,(S_a,S_(Ru),R_C,R_C)-3,which features the eta~2-coordination of a naphthyl substituent of the phos-phoramidite ligand,as indicated by ~1H,~(13)C,and ~(31)P NMR spectroscopy and by X-ray studies.Complex (S_a,S_(Ru),R_C,R_C)-3 catalyzes the asymmetric cyclopropa-nation of styrene and alpha-methylstyrene with ethyl diazo-acetate,giving good enantioselectivities for the latter olefin (up to 86% and 87% ee for the cis- and the trans-cyclopropane,respectively) when formed in situ in the presence of an excess of 1 to suppress ligand dissociation.
机译:从半三明治复合物[RuCl_2(eta〜6-p-cymene)(1-kappaP)]中提取氯离子(2; 1 =(S_a,R_C,R_C)-O,O'-(1,1'-二萘基具有TlPF_6或(Et_3O)PF_6的-2,2'-二基)-N,N-双(1-(1-(萘基)-乙基)亚磷酰胺)得到阳离子的18电子络合物(S_a,S_(Ru), R_C,R_C)-[RuCl-(η〜6-对-cymene)(O,O'-(1,1'-二萘基-2,2'-二基)-N-(1-(1,2-eta) -1-萘基)-N-(1-(1-萘基)乙基-亚磷酰胺-κP]] PF_6,(S_a,S_(Ru),R_C,R_C)-3,其eta〜2为特征-H,〜(13)C,〜(31)P NMR光谱和X射线研究表明,磷-亚磷酰胺配体的萘基取代基的配位。((S_a,S_(Ru),R_C ,R_C)-3催化重氮乙酸乙酯对苯乙烯和α-甲基苯乙烯的不对称环丙烷化反应,对后者的烯烃具有良好的对映选择性(顺式和反式环丙烷的ee分别高达86%和87%ee) )当在过量1的存在下原位形成以抑制配体解离。

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