Bayat, Mohammad published the artcileChemoselective synthesis of novel spiropyrano acenaphthylene derivatives via one-pot four-component reaction, Recommanded Product: 1-(2-Chlorophenyl)-3-methyl-5-pyrazolone, the publication is Tetrahedron Letters (2017), 58(45), 4260-4263, database is CAplus.
An efficient one-pot four-component condensation reaction of acenaphthoquinone, pyrazolones or barbituric acid and 1,1-bis(methylthio)-2-nitroethene and alkylamines in ethanol for the synthesis of novel spiro[acenaphthylene-1,4′-pyrano[2,3-c]pyrazol]-2-one and spiro[acenaphthylene-1,5′-pyrano[2,3-d]pyrimidine]trione is described. The significant features of this method include, readily available starting materials, operational simplicity, green solvent, catalyst-free condition, no column chromatog. purification and good to high yields. Thus, e.g., acenaphthoquinone I + pyrazolone II + ketene thioacetal III + MeNH2 afforded IV (81%) when the reaction was conducted in EtOH at 80° (90% in presence of nano SiO2 catalyst).
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 C10H9ClN2O, Recommanded Product: 1-(2-Chlorophenyl)-3-methyl-5-pyrazolone.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics