Various aryl, tertiary phosphines were oxidized by elemental sulfur and selenium. In contrast to the standard 8-36 h toluene reflux, 30–55 min microwave irradiations at 170°C in ethyl acetate were observed to produce the tertiary phosphine chalcogenides with conversion rates of greater than 95% and purities of greater than 98% - with multiple targets crystallizing directly from the reaction solution. Products were confirmed by melting point, IR, MS and heteronuclear (31P, 77Se) NMR. This faster, and greener procedure was an easy alternative protocols for the oxidation of phosphines with heavier chalcogens.

Green, facile method for the synthesis of phosphine sulfides and selenides

256th National Meeting (2018)

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