Nickel-catalyzed cyclo-oligomerization of aryl-substituted 1,1-dibromoethylenes in the presence or absence of diarylacety-lenes produces 1,2,3,4,6,6-hexaarylfulvenes and/or 1,2-diaryl-3,4-bis(diarylmethylene)cyclobutenes in moderate yields, providing a new and simple method for C6Ar6 conjugated hydrocarbons, highly overcrowded systems.
在存在或不存在二芳基
乙烯的情况下,
镍催化芳基取代的 1,1-二
溴乙烯的环-异构化反应,以中等产率生成 1,2,3,4,6,6-六芳基
富烯和/或 1,2-二芳基-3,4-双(二芳基亚
甲基)
环丁烯,为 C6Ar6 共轭烃类高度过密体系提供了一种新的简单方法。