Electric Literature of 288148-34-5,Some common heterocyclic compound, 288148-34-5, name is 1-Methyl-1H-pyrazole-4-sulfonyl chloride, molecular formula is C4H5ClN2O2S, 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.
100 mg (0.25 mmol) of 2-(4-benzyl-3-(ethoxycarbonylamino)chroman-6- yloxy)ethanaminium chloride were dissolved in 5 ml methylene dichloride. Then, 95 mg (0.79 mmol) dimethyl aminopyridine and 54 mg (0.30 mmol) 1 -methyl-1 H-pyrazole-4- sulfonyl chloride were added. The reaction mixture was stirred at room temperature over night. The mixture was concentrated in vacuo and the residue was dissolved in ethylace- tate and water. The phases were separated. The organic phase was washed with saturated ammonium chloride solution (2x), dried over MgS04 and concentrated (127 mg crude). The crude material was purified by column chromatography to give 1 18 mg (0.23 mmol, 93 %) of the desired product.ESI-MS [M+H+] = 515 Calculated for C25H3oN406S = 514.
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 1-Methyl-1H-pyrazole-4-sulfonyl chloride, its application will become more common.