Phenylated Benzotetraphenes (Dibenzanthracenes) by Nickel-Catalyzed Diphenylacetylene Cycloadditions to Linear [3]Phenylenes
作者:K. Vollhardt、Zhenhua Gu
DOI:10.1055/s-0033-1338500
日期:——
diphenylacetylene to the four-membered rings of linear [3]phenylene and its 2,3,7,8-tetrakis(trimethylsilyl) derivative. The reaction proceeds via initial formation of the 5,6-diphenylbenzo[3,4]cyclobuta[1,2-b]phenanthrene frame, followed by a competitive second, nonregioselective alkyne insertion to furnish the corresponding phenyl-substituted benzo[k]- and -[m]tetraphenes. Ni(COD)(PMe3)2 catalyzes the cycloaddition
摘要 Ni(COD)(PMe 3)2催化二苯基乙炔与线性[3]亚苯基及其2,3,7,8-四(三甲基甲硅烷基)衍生物的四元环的环加成反应。该反应通过最初形成5,6-二苯基苯并[3,4]环丁[1,2- b ]菲框架而进行,然后进行竞争性的第二,非区域选择性炔烃插入,以提供相应的苯基取代的苯并[ k ]-和-[ m ]四苯。 Ni(COD)(PMe 3)2催化二苯基乙炔与线性[3]亚苯基及其2,3,7,8-四(三甲基甲硅烷基)衍生物的四元环的环加成反应。该反应通过最初形成5,6-二苯基苯并[3,4]环丁[1,2- b ]菲框架而进行,然后进行竞争性的第二,非区域选择性炔烃插入,以提供相应的苯基取代的苯并[ k ]-和-[ m ]四苯。