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Visible light-induced aerobic oxidation of diarylalkynes to α-diketones catalyzed by copper-superoxo at room temperature

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Abstract

We have developed the visible light induced simple copper(II) chloride catalyzed oxidation of diarylacetylenes to α-diketones by molecular oxygen at room temperature. The in situ generated copper(II)-superoxo complex is a light-absorbing species that oxidizes inert diarylacetylenes to α-diketones. In contrast to reported photochemical processes, the current oxidation protocol does not require any exogenous photocatalyst or radical initiator. The green chemistry metrics evaluation signifies that the E-factor for the current oxidation process is ∼2.3 times better than that of reported photochemical processes. The current reaction scores 63 on the EcoScale of 0–100, indicating an adequate synthesis process. Thus, the overall oxidation process is simple, environmentally benign, and economically feasible.

Graphical abstract: Visible light-induced aerobic oxidation of diarylalkynes to α-diketones catalyzed by copper-superoxo at room temperature

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Supplementary files

Article information


Submitted
19 Mar 2020
Accepted
27 Apr 2020
First published
27 Apr 2020

Green Chem., 2020, Advance Article
Article type
Communication

Visible light-induced aerobic oxidation of diarylalkynes to α-diketones catalyzed by copper-superoxo at room temperature

V. P. Charpe, A. Sagadevan and K. C. Hwang, Green Chem., 2020, Advance Article , DOI: 10.1039/D0GC00975J

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