Some common heterocyclic compound, 162758-35-2, name is 5-(4-Chlorophenyl)-1-(2,4-dichlorophenyl)-4-methylpyrazole-3-carboxylic acid, molecular formula is C17H11Cl3N2O2, 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. HPLC of Formula: C17H11Cl3N2O2
3.8 ml dichlorosulfoxide was added to a suspension of 6.7g of the intermediate (4) in 70 ml toluene, the mixture was refluxed for 3 hours, evaporated in vacuum to dryness. The residue was dissolved in 70 ml toluene, and evaporated in vacuum to dryness, such evaporation was repeated for three times to give 6.2 g of yellow solid intermediate (5).
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 162758-35-2, its application will become more common.
Reference:
Patent; Beijing Molecule Science and Technology Co., Ltd.; EP1975168; (2008); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics