Synthetic Route of 37622-90-5, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 37622-90-5 name is Ethyl 4-pyrazolecarboxylate, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.
292.1 (1H-pyrazol-4-yl)-methanol To a suspension of LiAlH4 (5.3 g) in dry THF (100 mL) in a round-bottomed flask, under inert atmosphere (N2), was added portionwise ethyl pyrazole-4-carboxylate (10.0 g) at rt. The reaction mixture was stirred at rt overnight and then poured into a sat. aq. Rochelle salt solution. The mixture was stirred at rt for 3 h and diluted with EA. The layers were separated and the aq. layer was extracted with EA (3*). The combined org. layers were dried over MgSO4, filtered and concentrated under reduced pressure. The title compound was obtained, after drying, as a white solid (5.2 g; 76% yield). 1H NMR (d6-DMSO) delta: 12.60 (s, 1H); 7.50 (s, 2H); 4.77 (br. s, 1H); 4.38 (br. s, 2H).
At the same time, in my other blogs, there are other synthetic methods of this type of compound, Ethyl 4-pyrazolecarboxylate, and friends who are interested can also refer to it.
Reference:
Patent; Bur, Daniel; Gude, Markus; Hubschwerlen, Christian; Panchaud, Philippe; US2013/96119; (2013); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics