Electric Literature of 35344-95-7, 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. 35344-95-7 name is 1H-Pyrazole-4-carbaldehyde, 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.
To the stirred solution of lH-pyrazole~4~carbaldehyde 46-3 (461.54 mg, 4.80 mmol) and (l-benzy~4~ piperidyl) methanesulfonate 46-2 (1.2 g, 4.46 mmol) in DMF (20 mL) was added cesium carbonate (3.35 g, 10.28 mmol). Reaction mixture was heated at 80C for 16 hours and was then cooled to room temperature, diluted with ethyl acetate, washed with water and brine, dried over sodium sulfate and concentrated under reduced pressure. Crude material was purified by combiflash chromatography eluting at 0 1% methanol in dichlorometha e to afford l~(l-benzyl~4- piperidyl)pyrazole-4-carbaldehyde 46-4 (650 mg, 2.41 mmol, 70.42% yield) as brown gum. LC MS: ES+ 269 8.
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 1H-Pyrazole-4-carbaldehyde, and friends who are interested can also refer to it.
Reference:
Patent; C4 THERAPEUTICS, INC.; VEITS, Gesine, Kerstin; HE, Minsheng; HENDERSON, James, A.; NASVESCHUK, Christopher, G.; PHILLIPS, Andrew, J.; GOOD, Andrew, Charles; (471 pag.)WO2019/191112; (2019); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics