Zhu, Ye-Fu published the artcileSynthesis of pyrazolones and pyrazoles via Pd-catalyzed aerobic oxidative dehydrogenation, Formula: C10H9ClN2O, the publication is Tetrahedron Letters (2019), 60(17), 1202-1205, database is CAplus.
A novel, ligand free and easily accessible approach for the synthesis of pyrazolones I [R1 = Me, t-Bu, Ph, etc.; R2 = H, 4-Me, 2-Cl, etc.] and pyrazoles II [R3 = H, 4-Me, 3,4,5-tri-OMe; R4 = Me, CF3; R5 = H, 4-Me, 4-SO2NH2, etc.] was developed via Pd-catalyzed oxidative dehydrogenation of phenylpyrazolidines/substituted hydrazones in the presence of anthradione (AMS) as a cocatalyst. This method can be utilized to a wide range of substrates, operates under mild reaction conditions and could give high yields.
Tetrahedron Letters published new progress about 14580-22-4. 14580-22-4 belongs to pyrazoles-derivatives, auxiliary class Organic Pigment, name is 1-(2-Chlorophenyl)-3-methyl-5-pyrazolone, and the molecular formula is C38H74Cl2N2O4, Formula: C10H9ClN2O.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics