Polarity Umpolung Strategy for the Radical Alkylation of Alkenes

Free radical mediated alkylation of alkenes is a challenging and largely unmet goal. Disclosed here is a conceptually novel “polarity umpolung” strategy for radical alkylation of alkenes using a portfolio of easily accessed, difunctional alkylating reagents. This strategy is achieved by substituting...

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Veröffentlicht in:Angewandte Chemie 2020-05, Vol.132 (21), p.8272-8279
Hauptverfasser: Liu, Jige, Wu, Shuo, Yu, Jiajia, Lu, Chenxi, Wu, Zhen, Wu, Xinxin, Xue, Xiao‐Song, Zhu, Chen
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container_end_page 8279
container_issue 21
container_start_page 8272
container_title Angewandte Chemie
container_volume 132
creator Liu, Jige
Wu, Shuo
Yu, Jiajia
Lu, Chenxi
Wu, Zhen
Wu, Xinxin
Xue, Xiao‐Song
Zhu, Chen
description Free radical mediated alkylation of alkenes is a challenging and largely unmet goal. Disclosed here is a conceptually novel “polarity umpolung” strategy for radical alkylation of alkenes using a portfolio of easily accessed, difunctional alkylating reagents. This strategy is achieved by substituting inherently nucleophilic alkyl radicals with electrophilic sulfone‐bearing surrogates, thus inverting the usual mode of reactivity. Along with alkylation, either an heteroaryl or oximino group is concurrently incorporated into the alkenes by a consecutive docking and migration process, leading to valuable products. The reaction displays a broad functional‐group tolerance under mild reaction conditions. The protocol opens new vistas for the late‐stage modification of complex natural products and drug molecules containing alkene moieties. Ein einfaches Protokoll für die radikalische Alkylierung von Alkenen wurde basierend auf einer Strategie der Polaritätsumpolung entwickelt. Sowohl aktivierte als auch schwierige unaktivierte Alkene können umgesetzt werden. Die Methode bietet sich für späte Modifizierungen von Natur‐ und Wirkstoffmolekülen mit Alkengruppen an.
doi_str_mv 10.1002/ange.201915837
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subjects Alkene
Alkenes
Alkylation
Chemistry
Free radicals
Heterocyclen
Natural products
Photochemie
Polarity
Radikale
Reagents
Strategy
Umpolung
title Polarity Umpolung Strategy for the Radical Alkylation of Alkenes
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