Application of 50-33-9,Some common heterocyclic compound, 50-33-9, name is Phenylbutazone, molecular formula is C19H20N2O2, 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.
3-((2R,3R)-1-(Dimethylamino)-2-methylpentan-3-yl)phenol (250 mg) was dissolved while heating in as little ethanol as possible. 4-Butyl-1 ,2-diphenylpyrazolidine-3,5- dione (Phenylbutazone, 339 mg) was dissolved in H2O/ethanol under heating. The solutions were mixed, heated to reflux for 12 hours and allowed to cool to room temperature overnight. The solvent was removed in vacuo and the residue was dried by freeze drying to obtain a white solid (589 mg).
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Phenylbutazone, its application will become more common.
Reference:
Patent; GRUeNENTHAL GMBH; WO2007/128412; (2007); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics