Saturated bicyclic compounds make up a valuable class of building blocks in the development of agrochemicals and pharmaceuticals. Here, we present the synthesis of borylated bicyclo[2.1.1]hexanes via crossed [2 + 2]-cycloaddition. Due to the presence of the C–B bond, a variety of structures can be easily prepared that are not accessible by other methods. Moreover, a rare photo-ene reaction is also disclosed, allowing for the diastereoselective synthesis of trisubstituted borylated cyclopentanes.

中文翻译：

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[2 + 2]-环加成和光烯反应合成硼化碳环

饱和双环化合物是农用化学品和药品开发中一类有价值的构建模块。在这里，我们介绍了通过交叉[2 + 2]-环加成合成硼酸化双环[2.1.1]己烷。由于 C-B 键的存在，可以轻松制备其他方法无法获得的各种结构。此外，还公开了一种罕见的光烯反应，允许非对映选择性合成三取代的硼基化环戊烷。