In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 121507-34-4, name is 5-Isopropoxy-1H-pyrazol-3-amine belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below. Formula: C6H11N3O
To a mixture of 2,3,6-trichloro-5-nitropyridine (2.61 g, 11.4 mmol) and DIEA (1.90 ml, 11.4 mmol) in THF (50 ml) was added 5-isopropoxy-l/J-pyrazol-3-amine (1.20 g, 8.50 mmol) at 0 0C. After addition, the reaction mixture was stirred at 25 C for 5 days. The solvent was removed under reduced pressure and the resulted residue was purified by column chromatography (hexane-EtOAc = 1 : 1) to give the title compound as a yellow solid (0.51 g, 18%). 1H NMR (400 MHz) delta 12.22 & 11.35 (s, IH), 10.12 & 9.80 (s, IH), 8.64 & 8.54 (s, IH), 5.95 & 5.84 (s, IH), 4.70 & 4.46 (m, IH), 1.27-1.32 (m, 6H). MS: Calcd.: 331; Found: [M+H]+ 332.
The synthetic route of 121507-34-4 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2006/87538; (2006); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics