26033-20-5,Some common heterocyclic compound, 26033-20-5, name is 3-Phenyl-1H-pyrazole-4-carbaldehyde, molecular formula is C10H8N2O, 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.
To a solution of S-phenyl-lH-pyrazole-^carbaldehyde (10.0 g, 58.1 mmol) in acetic acid(100 mL, 58.1 mmol) was added bromine (10 mL, 195 mmol) dropwise at room temperature. The reaction was stirred at room temperature for 2 h. After quenched with aqueous solution of Na2SO3 (10 % wt aq., 10 mL), the reaction was concentrated and extracted with EtOAc, washed with brine, dried over MgSO4, and purified by silica gel column chromatography to give the title compound as yellow oil (10.2 g). LCMS mlz = 223.0 [MH-H]+; 1H NMR (400 MHz, DMSO-J6) delta ppm 7.37-7.53 (m, 3H), 7.76-7.84 (m, 2H), 7.91 (s, IH).
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 26033-20-5, its application will become more common.