Application of 637336-53-9, Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 637336-53-9, name is Methyl 4-amino-1-methyl-1H-pyrazole-3-carboxylate, This compound has unique chemical properties. The synthetic route is as follows.
C) Methyl 4-[(3-methoxy-3-oxopropyl)amino]-1-methyl-1H-pyrazole-3-carboxylate To a mixture of methyl 4-amino-1-methyl-1H-pyrazole-3-carboxylate (7.67 g) and methyl acrylate (5.45 g), acetic acid (0.77 g) was added, and the resulting mixture was stirred at 135C for 1 hour under irradiation with microwave. The reaction mixture was cooled to room temperature and then diluted with ethyl acetate. The reaction mixture was washed with a saturated aqueous solution of sodium bicarbonate and saturated brine and then dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/petroleum ether) to obtain the title compound (6.76 g). 1H NMR (400 MHz, CDCl3) delta 2.61 (2H, t, J = 6.8 Hz), 3.28-3.35 (2H, m), 3.70 (3H, s), 3.87 (3H, s), 3.89 (3H, s), 5.03 (1H, t, J = 6.4 Hz), 6.88 (1H, s).
The chemical industry reduces the impact on the environment during synthesis Methyl 4-amino-1-methyl-1H-pyrazole-3-carboxylate. I believe this compound will play a more active role in future production and life.
Reference:
Patent; Takeda Pharmaceutical Company Limited; ASANO, Yasutomi; KOJIMA, Takuto; KURASAWA, Osamu; WONG, Tzu-Tshin; HIRATA, Yasuhiro; IWAMURA, Naoki; SAITO, Bunnai; TANAKA, Yuta; ARAI Ryosuke; IMAMURA, Shinichi; YONEMORI, Kazuko; MIYAMOTO, Yasufumi; KITAMURA, Shuji; SANO, Osamu; (222 pag.)EP3287441; (2018); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics