Synthesis of structurally diverse pyrazolo[1,2-a]pyrazolones based on the selective C–H bond alkenylation–annulation of 1-arylpyrazolidinones with allenyl acetates

Abstract

Presented herein is a concise synthesis of structurally diverse pyrazolo[1,2-a]pyrazolones based on condition-controlled divergent reactions of 1-arylpyrazolidinones with allenyl acetates. To be specific, mono C−H bond alkenylation-annulation or double C−H...