El-Kousy, S. M. published the artcileA study on rearrangement of arylazo furanones and pyrrolinones, Application of 1,5-Diphenyl-1H-pyrazole-3-carboxylic acid, the publication is International Journal of Chemistry (Calcutta, India) (1994), 5(2), 65-75, database is CAplus.
Rearrangement of 5-phenyl-2,3-furandione 3-(phenylhydrazones) and 5-phenyl-2,3-furandione 3-[(4-chlorophenyl)hydrazones] gave 5-phenyl-1H-pyrrole-2,3-dione 3-(phenylhydrazones) and 5-phenyl-1H-pyrrole-2,3-dione 3-[(4-chlorophenyl)hydrazones]. Rearrangement of 5-phenyl-1H-pyrrole-2,3-dione 3-(phenylhydrazones) gave 1H-pyrazole-3-carboxylic acids. The oxopyrroline derivatives 4 were converted into 5 by treatment with phosphorous oxychloride. Replacement of chlorine atom in 5 was affected using aniline to give 6.
International Journal of Chemistry (Calcutta, India) published new progress about 13599-22-9. 13599-22-9 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Carboxylic acid,Benzene, name is 1,5-Diphenyl-1H-pyrazole-3-carboxylic acid, and the molecular formula is C16H12N2O2, Application of 1,5-Diphenyl-1H-pyrazole-3-carboxylic acid.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics