Synthetic Route of 16617-46-2,Some common heterocyclic compound, 16617-46-2, name is 3-Amino-1H-pyrazole-4-carbonitrile, molecular formula is C4H4N4, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
5-Amino-1H-pyrazole-4-carbonitrile (1) (5 g, 0.046 mol) was added to cooled concentrated sulphuric acid (10 ml) with stirring sothat the temperature did not rise above 20 °C. The addition took about one-half hour and solution was stirred at room temperaturefor 4 h. The acid solution was then poured with stirring into ice and the solution was kept overnight in the refrigerator. The solid was then filtered and washed with water to free of excess sulphuric acid to afford the desired product 5-amino-1H-pyrazole-4-carboxylic acid amide (2) as white solid; (5.19 g, 89percent); mp 220-222 °C (Lit.mp 222-225 °C) [33].
The synthetic route of 16617-46-2 has been constantly updated, and we look forward to future research findings.
Reference:
Article; Singla, Prinka; Luxami, Vijay; Singh, Raja; Tandon, Vibha; Paul, Kamaldeep; European Journal of Medicinal Chemistry; vol. 126; (2017); p. 24 – 35;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics