A method to achieve the synthesis of highly substituted spirocyclic cyclobutanes is disclosed. The reaction involves the catalytic arylboration of cyclobutenes. Depending on the substitution pattern of the cyclobutene, either a Cu/Pd- or a Ni-catalyzed reaction was utilized. In the case of the Cu/Pd-catalyzed reactions, the identification of a Cu-complex for arylboration was crucial to observe high selectivity. The synthetic utility of the products is demonstrated, and the mechanistic details are discussed.

中文翻译：

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螺环环丁烯的催化芳基硼化：快速获得高度取代的螺[3.n]烷烃

公开了一种合成高度取代的螺环环丁烷的方法。该反应涉及环丁烯的催化芳基硼化。根据环丁烯的取代模式，使用 Cu/Pd 或 Ni 催化反应。在铜/钯催化反应的情况下，鉴定用于芳基硼化的铜络合物对于观察高选择性至关重要。展示了产品的合成效用，并讨论了机械细节。