Palladium-Catalyzed Pathways to Aryl-Substituted Indenes: Efficient Synthesis of Ligands and the Respective <i>a</i><i>nsa</i>-Zirconocenes
作者:Vyatcheslav V. Izmer、Artyom Y. Lebedev、Mikhail V. Nikulin、Alexey N. Ryabov、Andrei F. Asachenko、Alexander V. Lygin、Denis A. Sorokin、Alexander Z. Voskoboynikov
DOI:10.1021/om050937e
日期:2006.2.1
cyclopenta[b]thiophenes of importance for further synthesis of ansa-metallocenes. Alternatively, (2-methyl-1H-inden-4-yl)boronic acid and (1-methoxy-2-methyl-2,3-dihydro-1H-inden-4-yl)boronic acid as well as the respective organozinc and -magnesium reagents can be used for synthesizing aryl-subsituted indenes via the Pd-catalyzed reactions with aryl halides. These synthetic methods were shown to have a very broad
取代的4- / 7-卤代-1 H-茚和5-甲基-3-溴-4- / 6 H-环戊[ b ]噻吩被证明是Suzuki-Miyaura,Negishi和Murahashi方案的简便起始原料。给出了相应的芳基取代的茚满和环戊[ b ]噻吩,它们对于进一步合成ansa-茂金属具有重要意义。或者,(2-甲基-1 H-茚满-4-基)硼酸和(1-甲氧基-2-甲基-2,3-二氢-1 H-茚-4-基)硼酸以及相应的有机锌和-镁试剂可用于通过Pd催化的与芳基卤化物的反应合成芳基取代的茚基。这些合成方法显示出提供芳基取代的茚的文库的非常广泛的范围。最后,几个代表性手性的合成和结构表征柄-zirconocenes,高活性和立体选择性的烯烃聚合催化剂的组分中潜在有用的,已被执行。
Palladium-catalyzed arylation of bis(4-bromo-2-methylinden-1-yl)dimethylsilane and related compounds
作者:M. V. Nikulin、A. A. Tsarev、A. V. Lygin、A. N. Ryabov、I. P. Beletskaya、A. Z. Voskoboinikov
DOI:10.1007/s11172-008-0325-z
日期:2008.11
the synthesis of a broad range of ansa-zirconocenes containing bis(2-methyl-4-arylindenyl)dimethylsilane ligands. The method is based on the palladium-catalyzed reaction of halogen-substituted bis(indenyl)dimethylsilanes with various organozinc compounds. The aryl-substituted bridging ligands thus prepared serve as the starting compounds for the synthesis of ansa-zirconocenes, which can be used as components