Electric Literature of 1621-91-6, These common heterocyclic compound, 1621-91-6, name is 1H-Pyrazole-3-carboxylic acid, its 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.
Scheme 33–Route to Preferred Groups 49 [4,3-d] ring fusion Nitration of pyrazole-3-carboxylic acid followed by reduction gives 4-aminopyrazole-3-carboxylic acid.
The synthetic route of 1621-91-6 has been constantly updated, and we look forward to future research findings.