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Synthesis of 1-perfluoroalkyl-3-heteroaryl bicyclo[1.1.1]pentanes via visible light-induced and metal-free perfluoroalkylation of [1.1.1]propellane

Perfluoroalkyl groups containing bicyclo[1.1.1]pentanes (BCPs) are gaining increasing interest in the pharmaceutical industry and materials science; however, the development of an efficient methodology to construct perfluoroalkylated BCPs remains a challenging task. In this paper, we present a metal...

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Published in:Green chemistry : an international journal and green chemistry resource : GC 2023-03, Vol.25 (5), p.1948-1954
Main Authors: Yan, Boan, Xu, Gongcheng, Han, Hang, Hong, Jun, Xu, Wenhao, Lan, Deyou, Yu, Chuanming, Jiang, Xinpeng
Format: Article
Language:English
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Summary:Perfluoroalkyl groups containing bicyclo[1.1.1]pentanes (BCPs) are gaining increasing interest in the pharmaceutical industry and materials science; however, the development of an efficient methodology to construct perfluoroalkylated BCPs remains a challenging task. In this paper, we present a metal-free strategy to synthesize 1-perfluoroalkyl-3-heteroaryl bicyclo[1.1.1]pentanes using an electron donor–acceptor (EDA) complex for the perfluoroalkylation of [1.1.1]propellane. After visible light irradiation, the resulting EDA complexes formed by perfluoroalkyl iodide and DBU lead to the generation of perfluoroalkyl radicals. These then sequentially react with highly strained [1.1.1]propellane and various heterocyclic compounds. Mechanistic studies revealed that this method proceeded via a radical chain reaction. This strategy may provide a versatile and sustainable way to obtain 1-perfluoroalkyl-3-heteroaryl bicyclo[1.1.1]pentanes with good functional group tolerance under mild conditions.
ISSN:1463-9262
1463-9270
DOI:10.1039/D2GC04683K