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. 1369959-12-5, name is 3-Chloro-5-nitro-1H-pyrazole, A new synthetic method of this compound is introduced below., Computed Properties of C3H2ClN3O2
Tin (II) chloride (12.8 g, 68 mmol) was added in portions to a solution of 3-chloro-5-nitro- lH-pyrazole (2.0 g, 13.6 mmol) in methanol (200 mL) and cone. HCl (10 mL) at 0 C. The reaction mixture was stirred at room temperature for 6 hours, and the organic solvent was removed under reduced pressure. The residue was diluted with water (20 mL), neutralized to pH 7 with Na2C03, then extracted with EtOAc (3 x 50 mL). The combined organic phases were washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated to give the title compound (1.4 g, 87%), which was used without further purification. 1H NMR (400 MHz, DMSO-d6): delta 11.55 (bs, 1H), 5.26 (s, 2H), 5.21 (s, 1H).
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Patent; CORNELL UNIVERSITY; DANA-FARBER CANCER INSTITUTE, INC.; CHILDREN’S MEDICAL CENTER CORPORATION; MELNICK, Ari, M.; GABAS, Lorena, Fontan; US, Ilkay; CASALENA, Gabriella; GRAY, Nathanael, S.; SCOTT, David, A.; HATCHER, John; DU, Guangyan; WU, Hao; QIAO, Qi; (157 pag.)WO2018/85247; (2018); A1;,
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