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BI-OAc-Accelerated C3-H Alkylation of Quinoxalin-2(1H)-ones under Visible-Light Irradiation.

Xiang-Kui HeJuan LuAi-Jun ZhangQing-Qing ZhangGuo-Yong XuJun Xuan
Published in: Organic letters (2020)
An efficient, photoredox-catalyst-free radical alkylation of quinoxalin-2(1H)-ones has been described. This reaction utilizes 4-alkyl-1,4-dihydropyridines (R-DHPs) as alkyl radical precursors and acetoxybenziodoxole (BI-OAc) as an electron acceptor to undergo single-electron transfer with photoexcited R-DHPs. The benign conditions allow for good compatibility in the scope of both quinoxalin-2(1H)-ones and R-DHPs. The synthetic value of the protocol was also demonstrated by the successful functionalization of natural products and drug-based complex molecules.
Keyphrases
  • visible light
  • electron transfer
  • randomized controlled trial
  • solar cells
  • radiation induced
  • energy transfer
  • gold nanoparticles
  • room temperature