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Issue 67, 2018
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Visible-light photocatalyzed oxidative decarboxylation of oxamic acids: a green route to urethanes and ureas

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Abstract

A sustainable metal-free route to urethanes and ureas based on a photocatalyzed oxidative decarboxylation of oxamic acids is described. The reaction includes in situ generation of an isocyanate from the oxamic acid, using an organic dye as a photocatalyst, a hypervalent iodine reagent as an oxidant and a light source, which trigger the free-radical decarboxylation. This protocol successfully avoids the isolation, purification and storage of carcinogenic isocyanates and allows elaboration of urethanes and ureas in a one-pot process from commercially available sources.

Graphical abstract: Visible-light photocatalyzed oxidative decarboxylation of oxamic acids: a green route to urethanes and ureas

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Publication details

The article was received on 09 Jul 2018, accepted on 27 Jul 2018 and first published on 27 Jul 2018


Article type: Communication
DOI: 10.1039/C8CC05462B
Citation: Chem. Commun., 2018,54, 9337-9340
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    Visible-light photocatalyzed oxidative decarboxylation of oxamic acids: a green route to urethanes and ureas

    G. G. Pawar, F. Robert, E. Grau, H. Cramail and Y. Landais, Chem. Commun., 2018, 54, 9337
    DOI: 10.1039/C8CC05462B

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