Palladium‐Copper‐Catalyzed Coupling of Tricarbonylchromium‐Complexed Phenylacetylene with Iodoarenes – A Facile Access to Alkynyl‐Bridged Cr(CO)
<sub>3</sub>
‐Complexed Benzenes
作者:Thomas J. J. Müller、Hans Jörg Lindner
DOI:10.1002/cber.19961290604
日期:1996.6
(4a–e) or 1 to give polynuclear Cr(CO)3-complexed (phenylethynyl)benzenes 5a–e and doubly Cr(CO)3-complexed tolane 6 in good to moderate yield. The crystal structure analyses of μ3-η6:η6:η6[1,3,5-benzenetriyltris(2,1-ethynediyl)]tris(benzene)}tris[tricarbonylchromium(0)] (5e) and μ-η6:η6-[1,2-ethynediylbis(benzene)]}bis[tricarbonylchromium(0)] (6) reveal that the tricarbonylchromium tripods in the same
钯-铜-催化的三羰基-铬络合氯苯的耦合1与(三甲基甲硅烷)-acetylene给出三羰基η 6铬(0)( - [(三甲基甲硅烷基)乙炔基] -苯} 2在高收率)。的脱甲硅基化后2三羰基[η 6 - (乙炔基苯)]铬(0)(3)被定量地得到。使用钯-铜催化的方法,我们可以通过3与碘苯,1,2-,1,3-,1,4-di-和1的多重偶联轻松引入Cr(CO)3络合的苯基乙炔基单元。3,5-硫代苯(4a–e)或1得到多核Cr(CO)3络合的(苯基乙炔基)苯5a-e和双Cr(CO)3络合的芳烃6,产率中等至中等。μ的晶体结构分析3 - η 6:η 6:η 6 [1,3,5-benzenetriyltris(2,1-ethynediyl)〕三(苯)}三[tricarbonylchromium(0)](图5e)和μ - η 6:η 6 - 〔1,2-ethynediylbis(苯)]}双[trica