Halogen Atoms as Reactive Centers for the Introduction of Functional Side Chains into (Arene)ruthenium(0) Complexes
作者:Gregor Bodes、Frank W. Heinemann、Günter Jobi、Jens Klodwig、Stefan Neumann、Ulrich Zenneck
DOI:10.1002/ejic.200390038
日期:2003.1
[(COD)(η6-naphthalene)Ru] (2) (COD = 1,5-cyclooctadiene) by suitable haloarenes (halogen = F, Cl, Br, I) affords several new mono- and dihaloarene(cyclooctadiene)ruthenium complexes. Depending on the number and position of the halogen and organyl substituents, the haloarenes form achiral or planar-chiral π-ligands; [(η6-bromoarene)(COD)Ru] complexes are prone to rapid bromine/lithium exchange with nBuLi at low temperatures
[(COD)(η6-萘)Ru] (2)(COD = 1,5-环辛二烯)的萘配体被合适的卤代芳烃(卤素 = F、Cl、Br、I)取代,得到了几种新的单卤代芳烃和二卤代芳烃(环辛二烯)钌配合物。根据卤素和有机基取代基的数量和位置,卤代芳烃形成非手性或平面手性 π-配体;[(η6-溴芳烃)(COD)Ru] 配合物在低温下易于与 nBuLi 进行快速溴/锂交换,而氯和氟衍生物在相同条件下会发生邻位金属化。锂化物质很容易与手性或非手性亲电试剂反应,例如氯代二有机磷烷、碳酰氯、醛、内酯、酮和环氧化物,生成侧链带有供体功能的取代 [(η6-芳烃)(COD)Ru] 配合物,无法通过其他路线。当非手性锂硫芳烃配合物与手性亲电试剂结合时,可以获得对映体纯复合物,但如果锂硫芳烃配体是平面手性物质,则会形成非对映异构体对。双核钌配合物 [1,1-双(COD)(η6-苯基)Ru}-1,4-丁二醇] (28) 和 [1