Gharbi, Rafik published the artcileA convenient synthesis of a novel fused tetracyclic heterocoumarin, Application of Ethyl 5-amino-3-methyl-1H-pyrazole-4-carboxylate, the publication is Journal of Heterocyclic Chemistry (2005), 42(1), 169-172, database is CAplus.
New tetracyclic 6H-[1]benzopyrano[3,4-e]pyrazolo[1,5-a]pyrimidin-6-ones (I, R1 = H, Me, Et; R2 = CN, CO2Et) have been synthesized through the condensation under acidic conditions of [1]benzopyrano[4,3-c][1,5]benzodiazepin-7(8H)-one (II) and a series of 3,4-disubstituted 5-amino-1H-pyrazoles (III).
Journal of Heterocyclic Chemistry published new progress about 23286-70-6. 23286-70-6 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Amine,Ester, name is Ethyl 5-amino-3-methyl-1H-pyrazole-4-carboxylate, and the molecular formula is C7H11N3O2, Application of Ethyl 5-amino-3-methyl-1H-pyrazole-4-carboxylate.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics