Liu, Chen-Fei published the artcileIridium(III)-Catalyzed Tandem Annulation Synthesis of Pyrazolo[1,2-α]cinnolines from Pyrazolones and Sulfoxonium Ylides, Application In Synthesis of 4551-69-3, the publication is Journal of Organic Chemistry (2019), 84(1), 409-416, database is CAplus and MEDLINE.
A highly efficient iridium-catalyzed cascade annulation of pyrazolones and sulfoxonium ylides to access various pyrazolo[1,2-α]cinnoline derivatives has been achieved. This novel approach expanded the application scope of coupling partners to ylides. The control experiments were performed to give insight into the mechanism of this reaction.
Journal of Organic Chemistry published new progress about 4551-69-3. 4551-69-3 belongs to pyrazoles-derivatives, auxiliary class Benzenes, name is 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, and the molecular formula is C17H14N2O2, Application In Synthesis of 4551-69-3.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics