I found the field of Chemistry very interesting. Saw the article Iridium(III)-Catalyzed Tandem Annulation Synthesis of Pyrazolo[1,2-alpha]cinnolines from Pyrazolones and Sulfoxonium Ylides published in 2019. Quality Control of 3-Methyl-1-p-tolyl-5-pyrazolone, Reprint Addresses Dong, L (corresponding author), Sichuan Univ, West China Sch Pharm, Educ Minist, Key Lab Drug Targeting & Drug Delivery Syst, Chengdu 610041, Sichuan, Peoples R China.. The CAS is 86-92-0. Through research, I have a further understanding and discovery of 3-Methyl-1-p-tolyl-5-pyrazolone
A highly efficient iridium-catalyzed cascade annulation of pyrazolones and sulfoxonium ylides to access various pyrazolo[1,2-alpha]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.
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Reference:
Article; Zhang, Yong; Nie, Long-Jun; Luo, Liang; Mao, Jia-Xin; Liu, Jin-Xiang; Xu, Guo-Hai; Chen, Deliang; Luo, Hai-Qing; Tetrahedron; vol. 76; 7; (2020);,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics