Application of 3920-50-1,Some common heterocyclic compound, 3920-50-1, name is Pyrazole-3-carboxaldehyde, molecular formula is C4H4N2O, 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.
Reference Production Example 6-1 1-(hydroxymethyl)-3-formyl-1H-pyrazole The mixture of 0.96 g of 3-formyl-1H-pyrazole, 0. 60 g of paraformaldehyde and 0.3 ml of triethylamine was stirred at 100 °C for 5 hours. After the reaction mixture was cooled to room temperature, acetone was added to the reaction mixture. The mixture was filtered. The filterate was concentrated under reduced pressure to obtain 1.21 g of 1-(hydroxymethyl)-3-formyl-1H-pyrazole. The crude product was used for next process without purification. 1H-NMR(CDCl3,TMS,delta(ppm)):5.63(2H,s),6.84(1H,d),7.67(1H,d),9.96(1H,s)
The synthetic route of 3920-50-1 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Sumitomo Chemical Company, Limited; EP1710234; (2006); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics