Vitamin B₁₂ plays a crucial role in enzymatic transformations. This natural compound proved also useful as a catalyst in numerous organic reactions. Commercial availability and lower cost than precious metal complexes, make cobalamin an attractive candidate for a broader use as a benign Co-catalyst. Herein, the vitamin B₁₂-catalyzed dicarbofuntionalization of bromoalkenes with electrophilic olefins is reported leading to substituted pyrrolidines and piperidines in decent yields after only 15 minutes under light irradiation.

中文翻译：

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可见光照射下维生素B12催化的溴代烯烃的双碳官能化

维生素B ₁₂在酶促转化中起关键作用。事实证明，这种天然化合物还可用作许多有机反应的催化剂。商业可获得性和比贵金属络合物更低的成本，使钴胺素成为广泛用作良性助催化剂的诱人候选物。在本文中，据报道维生素B ₁₂催化的具有亲电烯烃的溴代烯烃的二碳甲酰化作用导致在光照射下仅15分钟后以适当的产率产生取代的吡咯烷和哌啶。