Elnagdi, Mohamed H. published the artcilePyrimidine derivatives and related compounds. I. Synthesis of some 2,3-disubstituted-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine derivatives, Name: Ethyl 5-amino-3-methyl-1H-pyrazole-4-carboxylate, the publication is Zeitschrift fuer Naturforschung, Teil B: Anorganische Chemie, Organische Chemie (1975), 30B(9-10), 778-83, database is CAplus.
The 5-aminopyrazole derivatives I (R = PhN:N, R1 = Ph; R = PhN:NCO2Et, R1 = Me) react with H2C:CHCN to yield the corresponding 1-β-cyanoethyl-5-aminopyrazole derivatives, which were readily cyclised into the corresponding pyrazolo[1,5-a]pyrimidines II (R2 = H). Under similar conditions I failed to react with methylacrylonitrile or Me methactylate. When the reaction of I with these reagents was conducted in ethanolic NaOEt, the II (R2 = Me) were formed. Structures of resulting products was established by their synthesis via interaction of β-cyanoethylhydrazine and β-cyanopropylhydrazine with the appropriate β-bifunctional nitrile. I (R = PhN:N, R1 = Me, Ph) also reacted with PhC:CCO2Et to yield the pyrazolo[1,5-a]pyrimidine derivatives (III).
Zeitschrift fuer Naturforschung, Teil B: Anorganische Chemie, Organische Chemie 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, Name: Ethyl 5-amino-3-methyl-1H-pyrazole-4-carboxylate.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics