The synthesis of ten ortho-fused PAHs bearing boronic pinacol ester groups (BPin) is reported. The products are obtained via modification of Mallory photocyclization in 45-99% yields. Among them are examples of highly strained molecules such as [4]helicene derivatives with BPin substituents in the cavity. The method allows double C-C coupling and tolerates more than one BPin functionality.

中文翻译：

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具有硼酸酯部分的二芳基乙烯的光环化：可溶性PAH结构单元的有用合成工具。

报道了十个带有硼频哪醇酯基（BPin）的邻位熔融PAHs的合成。通过修饰马洛里光环化获得产物，产率为45-99％。其中有高应变分子的例子，例如在腔中具有BPin取代基的[4]螺旋衍生物。该方法允许双CC耦合，并可以承受多个BPin功能。