Efficient and facile strategy to substituted 2-aminothiazoles via ring opening of α-nitroepoxides

NH4I-promoted electrosynthesis of 2-aminothiazole derivatives from ketone compounds and NH4SCN

A novel and efficient electrochemical synthesis of 2-aminothiazole derivatives from ketones and NH4SCN is described. Under the co-action of NH3 and iodine free radicals or iodine (I2) electrochemically generated in situ, the target product 2-aminothiazole derivatives could be successfully obtained in good to excellent yields.

Catalyst-Free Synthesis of Benzofuran Derivatives from Cascade Reactions between Nitroepoxides and Salicylaldehydes

Different benzofuran derivatives are synthesized via a catalyst-free reaction between nitroepoxides and salicylaldehydes. In the employed methodology, K₂CO₃ and DMF have been used at 110 °C, and the reactions were completed after 12 h in 33-84% yields. The highest yields were obtained using 3-nitrosalicylaldehyde. Finally, a plausible mechanism was proposed for the reaction, and some evidence was provided for this mechanism such as the detection of released acetate anion (using FTIR) and isolation and structure determination of the critical intermediate.

Nitroepoxide ring opening with thionucleophiles in water: synthesis of α-xanthyl ketones, β-keto sulfones and β-keto sulfonic acids

Nitroepoxide ring opening with thionucleophiles such as potassium xanthates, sodium aryl sulfinates and sodium bisulfite in water is investigated to provide the corresponding α-xanthyl-α-aryl-2-propanones, β-keto sulfones and β-keto sulfonic acids.