Red light has the advantages of low energy, less health risk and high penetration depth through various media. Thus, the development of a sustainable catalytic system for red-light-induced photocatalysis is of great significance. Herein, a helical carbenium ion (N,N’-di-n-propyl-1,13-dimethoxyquinacridinium (nPr-DMQA+) tetrafluoroborate) has been used as an organic photoredox catalyst (PC) for photoreductions and photooxidations in the presence of red light (λmax = 640 nm). Its successful applications in aerobic oxidative hydroxylation of arylboronic acids and oxidation of benzylic C(sp3)-H bond (reductive quenching), as well as dual transition-metal/nPr-DMQA+-catalyzed C-H arylations and intermolecular atom transfer radical addition (oxidative quenching) have further supported its role as a versatile and efficient organic PC.

Helical carbenium ion: A versatile organic photoredox catalyst for red-light-induced reactions

ACS Spring Meeting 2021

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