Application of 35691-93-1, 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. 35691-93-1 name is Ethyl 3,5-dimethyl-1H-pyrazole-4-carboxylate, 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.
General procedure: 4.3.1. Ethyl 5-amino-2-methylpyrazolo[1,5-a]quinoline-3-carboxylate (7a). Condition C: A mixture of 2-fluorobenzonitrile6a (121 mg, 1.00 mmol), 1H-pyrazole 4 (202 mg, 1.20 mmol) andCs2CO3 (980 mg, 3.00 mmol) in DMF (5.0 mL) was stirred at 120 Cfor 16 h. After monitoring the end of the reaction on TLC, themixture was cooled to room temperature and diluted with water.The resulting mixture was extracted with ethyl acetate twice. Thecombined organic layers werewashed with water twice, dried overMgSO4 and the solvent was removed in vacuo to afford a residue.The residue was purified by flash column chromatography(hexane:EtOAc1:1) on silica gel to afford 7a (124 mg, 46% yield).Condition D: The reaction was carried out in DMSO instead of DMFunder the same conditions as that of condition C to afford 7a (175 mg, 65% yield).
At the same time, in my other blogs, there are other synthetic methods of this type of compound, Ethyl 3,5-dimethyl-1H-pyrazole-4-carboxylate, and friends who are interested can also refer to it.