5334-40-7, 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. 5334-40-7, name is 4-Nitro-1H-pyrazole-3-carboxylic acid belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.
EXAMPLE 6 N-(4-((4-morpholinyl)methyl)phenyl)-4-nitro-1H-3-pyrazolecarboxamide (I-f) Crude I-d (7.5 g, 39.0 mmol), 4-nitro-1H-pyrazole-3-carboxylic acid (6.3 g, 40.1 mmol), EDC¡¤HCl (8.4 g, 44.0 mmol), HOBT (6.0 g, 44.4 mmol) and anhydrous DMF (100 ml) were added into a 250 mL round bottom flask, which was stirred for 24 hours at room temperature. The depletion of the starting materials was confirmed by TLC (methanol: chloroform = 1:20). The reaction mixture was poured into 200 mL ice water and a large amount of yellowish solid precipitation was acquired, which was allowed to stand and suction filtered to give yellow solid. The crude was recrystallized from the mixed solvents of ethyl acetate and methanol to give 11.6 g (I-f); Yield: 89.7%; mp: 208-210 C; MS [M+H]+332.4. 1H-NMR[300MHz, DMSO-d6]: delta2.4 (4H, t, J = 4.1 Hz, -NCH2-*2), 3.4 (2H, s, -CH2-), 3.6 (4H, t, J = 4.1 Hz, -OCH2-*2), 7.3 (2H, d, J = 8.4 Hz, ArH), 7.6 (2H, d, J = 8.4 Hz, ArH), 8.9 (1H, s, ArH), 10.7 (1H, s, -NHCO-), 14.2 (1H, s, Pyrazole).
The synthetic route of 5334-40-7 has been constantly updated, and we look forward to future research findings.