Tunable Phosphoramidite Ligands for Asymmetric Hydrovinylation: Ligands par excellence for Generation of All-Carbon Quaternary Centers
作者:T. RajanBabu、Craig Smith、Hwan Lim、Aibin Zhang
DOI:10.1055/s-0029-1216826
日期:2009.6
2′-biphenol are almost as good as ligands derived from the more expensive enantiopure 1,1′-bi(2-naphthol)s. The hydrovinylation products, which carry two versatile latent functionalities, an aryl and a vinyl group, are potentially useful for the synthesis of several important natural products containing benzylic all-carbon quaternary centers. alkenes - asymmetric catalysis - hydrovinylation - phosphoramidite
α-烷基苯乙烯在由 [(烯丙基)NiBr] 2、Na + [BAr 4 ] - [Ar = 3,5-双(三氟甲基)苯基]制备的镍催化剂存在下进行有效的加氢乙烯基化(添加乙烯),并且亚磷酰胺配体以优异的产率和对映选择性提供产品。在许多情况下,衍生自非手性 2,2'-双酚的亚磷酰胺几乎与衍生自更昂贵的对映体纯 1,1'-双(2-萘酚)的配体一样好。氢乙烯基化产物带有两个通用的潜在官能团,一个芳基和一个乙烯基,可用于合成几种含有苄基全碳季中心的重要天然产物。 烯烃 - 不对称催化 - 加氢乙烯基化 - 亚磷酰胺配体 - 镍