Synthesis and characterization of polybrominated fluorenes and their conversion to polyphenylated fluorenes and cyclopenta[def]triphenylene
作者:Sushil Kumar、Durai Karthik、K.R. Justin Thomas、Maninder Singh Hundal
DOI:10.1016/j.tetlet.2014.02.002
日期:2014.3
We report the synthesis and characterization of polyphenylated fluorene derivatives and a ring cyclized product containing cyclopenta[def]triphenylene core. Polybromination on fluorene was achieved either by solid state reaction with bromine or utilizing Br2/KBrO3 in AcOH/H2SO4 mixture. The bromofluorenes were converted to the corresponding polyphenylated fluorenes by Suzuki coupling protocol. A hexabromofluorene
我们报告了合成和表征聚苯芴基衍生物和包含环戊环[ def ]三亚苯基核心的环化产物。在芴上的多溴化反应可通过与溴进行固态反应或通过在AcOH / H 2 SO 4混合物中使用Br 2 / KBrO 3来实现。通过Suzuki偶联方案将溴芴转化为相应的多苯基芴。六溴芴经过多次Suzuki偶联,然后经C–H活化,生成环戊[ def ]三亚苯基衍生物。芴环显示出超过四取代的平面度的严重变形,这在光学性质中表现出来。