Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 25700-12-3, name is 3-(1H-Pyrazol-1-yl)pyridine, A new synthetic method of this compound is introduced below., Recommanded Product: 25700-12-3
Step 2: Preparation of 3-(4-nitro-pyrazol-1-yl)-pyridine 3-Pyrazol-1-yl-pyridine (2 g, 0.032 mol) was dissolved in concentrated H2SO4 (32 mL 0.598 mmol) and cooled at -5 C. using an ice bath. To the reaction mass, a 1:1 mixture of concentrated HNO3 (30 mL, 0.673 mmol) and concentrated H2SO4 (30 ml, 15 Vol.) was added dropwise over a period of 30 min. Cooling was discontinued and the reaction mixture was stirred at room temperature overnight. After the reaction was complete, the mixture was poured over crushed ice and neutralized with saturated NaHCO3, filtered, washed with water and dried to furnish the nitro pyrazole as pale yellow solid (1.8 g, 68%): 1H NMR (400 MHz, DMSO-d6) delta 9.03 (d, J=2.8 Hz, 1H); 8.70 (dd, J=4.8, 1.6 Hz, 1H), 8.69 (s, 1H), 8.33 (s, 1H), 8.11-8.08 (m, 1H), 7.51 (dd, J=8.4, 4.8 Hz, 1H); MS (m/z) 191 [M+1].
The synthetic route of 25700-12-3 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Dow AgroSciences LLC; Buysse, Ann M.; Niyaz, Noormohamed M.; Demeter, David A.; Zhang, Yu; Walsh, Martin J.; Kubota, Asako; Hunter, Ricky; Trullinger, Tony K.; Lowe, Christian T.; Knueppel, Daniel I.; Patny, Akshay; Garizi, Negar; LePlae, JR., Paul Renee; Wessels, Frank J.; Ross, JR., Ronald; DeAmicis, Carl; Borromeo, Peter; (118 pag.)US2016/60245; (2016); A1;,
Pyrazole – Wikipedia,
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