Electric Literature of 3920-50-1, These common heterocyclic compound, 3920-50-1, name is Pyrazole-3-carboxaldehyde, 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.
EXAMPLE 3 Synthesis of 3-pyrazolecarbaldehyde-(5-nitro-2-pyridyl)hydrazone (compound 3) A desired product was obtained in the same manner as in Example 1 by using 3.20 g (20.8 mmol) of 5-nitro-2-pyridylhydrazine and 1.90 g (19.8 mmol) of 3-pyrazolecarbaldehyde. Yield: 3.92 g (16.9 mmol) [yield rate: 85percent] Melting point: 286° to 287° C.
The synthetic route of 3920-50-1 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Kabushiki Kaisha Toshiba; US5569763; (1996); A;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics