Deoxygenative radical cross-coupling of C(sp3)−O/C(sp3)−H bonds promoted by hydrogen-bond interaction

Autor: Yue Wang, Suping Zhang, Ke Zeng, Pengli Zhang, Xiaorong Song, Tie-Gen Chen, Guoqin Xia
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Nature Communications, Vol 15, Iss 1, Pp 1-8 (2024)
Druh dokumentu: article
ISSN: 2041-1723
DOI: 10.1038/s41467-024-50897-7
Popis: Abstract Building C(sp3)-rich architectures using simple and readily available starting materials will greatly advance modern drug discovery. C(sp3)−H and C(sp3)−O bonds are commonly used to strategically disassemble and construct bioactive compounds, respectively. However, the direct cross coupling of these two chemical bonds to form C(sp3)−C(sp3) bonds is rarely explored in existing literature. Conventional methods for forming C(sp3)−C(sp3) bonds via radical-radical coupling pathways often suffer from poor selectivity, severely limiting their practicality in synthetic applications. In this study, we present a single electron transfer (SET) strategy that enables the cleavage of amine α-C − H bonds and heterobenzylic C − O bonds to form C(sp3)−C(sp3) bonds. Preliminary mechanistic studies reveal a hydrogen bond interaction between substrates and phosphoric acid facilitates the cross-coupling of two radicals with high chemoselectivity. This methodology provides an effective approach to a variety of aza-heterocyclic unnatural amino acids and bioactive molecules.
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