6972. Oxyphenbutazone

Nomenclature

CAS number: 129-20-4
4-Butyl-1-(4-hydroxyphenyl)-2-phenyl-3,5-pyrazolidinedione; 4-butyl-2-(p-hydroxyphenyl)-1-phenyl-3,5-pyrazolidinedione; 1-phenyl-2-(p-hydroxyphenyl)-3,5-dioxo-4-n-butylpyrazolidine; 1-(p-hydroxyphenyl)-2-phenyl-4-butylpyrazolidine-3,5-dione; p-hydroxyphenylbutazone; G-27202; Californit (Merckle); Crovaril; Flogitolo; Flogoril; Frabel; Neo-Farmadol; Oxalid (USV); Rapostan (Mepha); Tandearil (Novartis); Visubutina.
C19H20N2O3; mol wt 324.37.
C 70.35%, H 6.21%, N 8.64%, O 14.80%.

Description and references

Prepn: Hafliger, US 2745783 (1956 to Geigy); Pfister, Hafliger, Helv. Chim. Acta 40, 395 (1957).

Chemical structure

Derivative

Monohydrate.

Nomenclature

CAS number: 7081-38-1
Imbun (Merckle); Phlogistol (Spitzner); Phlogase (Adenylchemie); Phlogont (Azupharma).

Properties

Crystals, mp 96°. Anhydr crystals from ether + petr ether, mp 124-125°. Acidic reaction. Soluble in ethanol, methanol, chloroform, benzene, ether. Forms a water-soluble sodium salt.

Therapeutic Category

Anti-inflammatory.

Keywords

Anti-inflammatory (Nonsteroidal); Pyrazolones