Conjugated Azoalkenes. Part XVIII. Synthesis of Functionally Substituted 3-Phosphono-1-aminopyrrol-2-ones and Phosphonohydrazones by Reaction of Conjugated Azoalkenes with β-Phosphonocarboxylates

Abstract

New 3-diethylphosphono-2,3-dihydro-3,5-dimethyl-4-alkoxycarbonyl-1-aminopyrrol-2-ones and ethyl 2-diethylphosphono-2-methyl-3-alkoxycarbonyl-4-hydrazonopentanoates were obtained from conjugated azoalkenes and triethyl 2-phosphonopropionate. The synthesis of methyl 2-dimethylphosphono-3-alkoxycarbonyl-4-hydrazonopentanoates by reaction between conjugated azoalkenes and trimethyl phosphonoacetate is also reported.