Related Products of 28466-26-4, 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. 28466-26-4 name is 4-Aminopyrazole, 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.
Example 150 3-[(2-chlorophenoxy)methyl]-N-1H-pyrazol-4-ylbenzamide 3-[(2-Chlorophenoxy)methyl]benzoic acid was suspended in tetrahydrofuran (50 mL), and oxalyl chloride (1.03 mL) and N,N-dimethylformamide (catalytic amount) were added. After stirring at room temperature for 30 min, the mixture was added dropwise to a suspension of 1H-pyrazol-4-amine (1.0 g) in N,N-dimethylacetamide (50 mL). After stirring at room temperature for 5 hr, ethyl acetate was added, and the mixture was washed 3 times with saturated aqueous sodium hydrogen carbonate solution. The organic layer was dried over sodium sulfate and concentrated under reduced pressure. The residue was purified by silica gel chromatography and recrystallized from ethyl acetate/hexane to give the object product (280 mg, 7.8%). 1H NMR (300 MHz, DMSO-d6) delta ppm 5.29 (s, 2H) 6.93-7.02 (m, 1H) 7.22-7.35 (m, 2H) 7.46 (dd, J=1.51, 7.91 Hz, 1H) 7.56 (t, J=7.72 Hz, 1H) 7.63-7.70 (m, 1H) 7.85 (brs, 2H) 7.89-7.95 (m, 1H) 8.02-8.06 (m, 1H) 10.47 (s, 1H) 12.63 (brs, 1H)
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 4-Aminopyrazole, and friends who are interested can also refer to it.
Reference:
Patent; Taniguchi, Takahiko; Miyata, Kenichi; Kubo, Osamu; Matsui, Junji; US2009/325956; (2009); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics