A Novel Synthesis of 2,2-Disubstituted 3-Amino-2H-azirines Based on the Reaction between Amide Enolates and Diphenyl Phosphorochloridate
作者:Jos� M. Villalgordo、Heinz Heimgartner
DOI:10.1002/hlca.19930760809
日期:1993.12.15
A novel synthesis of 2,2-disubstituted 3-amino-2H-azirines based on the reaction between amide enolates and diphenyl phosphorochloridate (DPPCl), followed by treatment with NaN3 is presented. The yields obtained in general are excellent, and the method is suitable for laboratory-scale preparations as well as for larger amounts.
Oxindole synthesis <i>via</i> polar–radical crossover of ketene-derived amide enolates in a formal [3 + 2] cycloaddition
作者:Niklas Radhoff、Armido Studer
DOI:10.1039/d1sc07134c
日期:——
and transition-metal free method for the preparation of valuable and sterically hindered 3,3-disubstituted oxindoles via polar–radical crossover of ketene derived amide enolates. Various easily accessible N-alkyl and N-arylanilines are added to disubstituted ketenes and the resulting amide enolates undergo upon single electron transfer oxidation a homolytic aromatic substitution (HAS) to provide 3,3-disubstituted