In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 478968-48-8 as follows. HPLC of Formula: C7H10N2O3
Step 4. Ethyl 3-methoxy-l-pyrimidin-2-yl-lH-pyrazole-4-carboxylate; Sodium hydride (60% in mineral oil, 528 mg, 13.2 mmol) is added portion wise to a solution of ethyl 3-methoxy-lH-pyrazole-4-carboxylate (1.5 g, 8.81 mmol) in 40 mL of THF at RT. Evolution of H2 (g) is observed. After about 5-10 min, 2-chloropyrirnidine (1.0 g, 8.81 mmol) is added, and the resulting reaction mixture is stirred at reflux for 15 h. After cooling to RT, the reaction is quenched with 10 mL of sat. NH4Cl and 10 mL of water and extracted with CH2Cl2 (2 x 40 mL). The combined organic extracts are dried (Na2SO4), filtered, and evaporated in vacuo to give a brown solid. Purification by silica gel column chromatography (gradient from 50% EtOAc/hexane to EtOAc) affords the title compound as a fluffy white solid.
According to the analysis of related databases, 478968-48-8, the application of this compound in the production field has become more and more popular.
Reference:
Patent; NEUROGEN CORPORATION; WO2009/12482; (2009); A2;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics