Pd-Catalyzed Regio- and Stereoselective Addition of Boronic Acids to Silylacetylenes: A Stereodivergent Assembly of β,β-Disubstituted Alkenylsilanes and Alkenyl Halides
作者:Wei Kong、Chao Che、Jialin Wu、Liai Ma、Gangguo Zhu
DOI:10.1021/jo500925p
日期:2014.6.20
Pd-catalyzed addition of boronic acids to silylacetylenes is described, providing β,β-disubstituted (E)- or (Z)-alkenylsilanes in satisfactory yields with excellent regio- and stereoselectivity under mild reaction conditions. It represents the first highly regio- and stereoselective addition of boronic acids to aryl and alkenyl silylacetylenes. Moreover, the sequential Pd-catalyzed boron addition/N-halosuccinimide-mediated
描述了硼酸向甲硅烷基乙炔的有效Pd催化加成,以令人满意的产率提供β,β-二取代的(E)-或(Z)-烯基硅烷,在温和的反应条件下具有优异的区域和立体选择性。它代表了硼酸向芳基和烯基甲硅烷基乙炔的首次高度区域选择性和立体选择性加成。此外,顺序的Pd催化的硼加成/ N-卤代琥珀酰亚胺介导的卤代甲硅烷基化反应导致立体发散的方法合成β,β-二取代的烯基卤化物,可以用作(E)-和(Z)立体发散组装的通用合成中间体。过渡金属催化的交叉偶联反应)合成三取代的烯烃。