44 research outputs found
A Versatile Approach to Ullmann C–N Couplings at Room Temperature: New Families of Nucleophiles and Electrophiles for Photoinduced, Copper-Catalyzed Processes
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Synthesis of Cyclic Dienamide Using Ruthenium-Catalyzed Ring-Closing Metathesis of Ene-Ynamide
No full textHeteropolyacids as Green and Reusable Catalysts for the Synthesis of Isoxazole Derivatives
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Synthesis of Ketene N,N-Acetals by Copper-Catalyzed Double-Amidation of 1,1-Dibromo-1-alkenes
No full textAn efficient procedure for the preparation of ketene N,N-acetals by copper-catalyzed double amidation of 1,1-dibromo-1-alkenes is reported. The reaction was found to be general, and ketene aminals could be obtained in good yields when potassium phosphate in toluene was used at 80 °C. The reaction was found to proceed through a regioselective monocoupling reaction followed by dehydrobromination and hydroamidation.info:eu-repo/semantics/publishe
A Formal [3 + 3] Cycloaddition Reaction. Improved Reactivity Using α,β-Unsaturated Iminium Salts and Evidence for Reversibility of 6π-Electron Electrocyclic Ring Closure of 1-Oxatrienes
No full textCopper-Catalyzed Alkynylation of Amides with Potassium Alkynyltrifluoroborates: A Room-Temperature, Base-Free Synthesis of Ynamides
No full textAn efficient copper-mediated method for the coupling of potassium alkynyltrifluoroborates with nitrogen nucleophiles is reported. This reaction provides the first base-free and room-temperature synthesis of ynamides and allows for an easy preparation of these useful building blocks.info:eu-repo/semantics/publishe
