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Fe/S-Catalyzed Redox Condensation of -Nitrophenols with Isothiocyanates to 2-Aminobenzoxazoles. | LitMetric
As frequently encountered byproducts of isocyanate chemistry, hydrogen sulfide and related sulfur containing compounds should be treated in a safe way to lower their adverse health and environmental effects, especially in large scale syntheses. As a proof of concept, we report herein an example of in situ recycling of sulfur byproduct to reductant in the synthesis of bioactive 2-aminobenzoxazoles . Using an Fe/S catalytic system, this heterocyclic scaffold could be obtained from nitrophenols with isothiocyates via direct redox condensation consisting of reduction of the nitro group of by the sulfur moiety of .
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