Dorn, Helmut et al. published their research in Chemische Berichte in 1966 | CAS: 3528-58-3

1-Ethyl-1H-pyrazol-5-amine (cas: 3528-58-3) belongs to pyrazole derivatives. The strategies for the synthesis of pyrazoles generally can be applied for the construction of indazoles. Pyrazole rings have been used as core components of several leading non-steroidal anti-inflammatory drugs (NSAIDs) and antihypertensive drugs. It has also been found to be useful as a bifunctional ligand for metal catalysis.COA of Formula: C5H9N3

Redox cleavage of sulfonamides. V. Structure of the bis-(arylsulfonyl) derivatives of 5-amino-1-methylpyrazole was written by Dorn, Helmut;Hilgetag, Guenter;Zubek, Alfred. And the article was included in Chemische Berichte in 1966.COA of Formula: C5H9N3 This article mentions the following:

Bis(arylsulfonyl) derivatives of 5-amino-1-methylpyrazole formed from 5-amino-1-methylpyrazole (I) and the 5-SO2NH2 analog of I in C5H5N were shown by spectroscopic and chem. evidence to carry the 2 sulfonyl groups on the exocyclic N atom. II (Ar = Ph or p-ClC6H4) (0.004 mole) in 16 cc. dry C5H5N shaken 48 hrs. at room temperature with 0.0043 mole Ar’SO2Cl (Ar’ = p-ClC6H4 or p-MeC6H4) and poured onto ice and 80 cc. 2N HCl gave the following III (Ar, Ar’, % yield, and m.p. given): Ph, p-ClC6H4, (IV), 81.5, 128-9°; Ph, p-MeC6H4 (V), 85.0, 116-17°; p-ClC6H4, p-MeC6H4, (VI), 74.2, 171-2°. The same compounds were also prepared in a similar manner from the II (Ar = p-ClC6H4 or p-MeC6H4) with the Ar’SO2Cl (Ar’ = Ph or p-ClC5H4) (% given): IV 51.2, V 62.4, VI 65.8. The uv spectra of 5-(p-toluenesulfonamino)-1-methylpyrazole, V, and VI are recorded. In the experiment, the researchers used many compounds, for example, 1-Ethyl-1H-pyrazol-5-amine (cas: 3528-58-3COA of Formula: C5H9N3).

1-Ethyl-1H-pyrazol-5-amine (cas: 3528-58-3) belongs to pyrazole derivatives. The strategies for the synthesis of pyrazoles generally can be applied for the construction of indazoles. Pyrazole rings have been used as core components of several leading non-steroidal anti-inflammatory drugs (NSAIDs) and antihypertensive drugs. It has also been found to be useful as a bifunctional ligand for metal catalysis.COA of Formula: C5H9N3

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics