These common heterocyclic compound, 26621-44-3, name is 3-Nitro-1H-pyrazole, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. category: pyrazoles-derivatives
To a solution of 3-nitro-lH-pyrazole (5.0g, 44.22mmol, l .Oeq) in tetrahydrofuran (50mL) was added sodium hydride (1.6g, 66.33mmol, 1.5eq) at 0C and reaction mixture was stirred for 30 min followed by 2-(Trimethylsilyl)ethoxym ethyl chloride (8.86g, 53.06mmol, 1.2eq) was added at the same temperature. The reaction mixture was allowed to come at room temperature and stirred for 24h. After completion of reaction, reaction mixture was transferred in to ice cold water and extracted with ethyl acetate. Organic layer was combined, washed with brine, dried over sodium sulphate and concentrated under reduced pressure to obtain crude material. This was further purified by column chromatography and compound was eluted on 15% ethyl acetate in hexane as eluent to obtain 185.1. (7.9g, 73.42%). MS(ES): m/z 244.34 [M+H]+
The synthetic route of 3-Nitro-1H-pyrazole has been constantly updated, and we look forward to future research findings.