| | Identification | More |  | [Name] 
 Flavoxate hydrochloride
 |  | [CAS] 
 3717-88-2
 |  | [Synonyms] 
 3-METHYL-4-OXO-2-PHENYL-4H-1-BENZOPYRAN-8-CARBOXYLIC ACID 2-(1-PIPERIDINYL)ETHYL ESTER HYDROCHLORIDE
 3-METHYL-4-OXO-2-PHENYL-4H-BENZOPYRAN-8-CARBOXYLIC ACID 2-PIPERIDINYL ETHYL ESTER HYDROCHLORIDE
 DW-61
 FLAVOXATE HCL
 FLAVOXATE HYDROCHLORIDE
 REC-7-0040
 1-piperidineethanol,3-methyl-4-oxo-2-phenyl-4h-1-benzopyran-8-carboxylate,h
 2-piperidinoethyl-3-methyl-4-oxo-2-phenyl-4h-1-benzopyran-8-carboxylatehydro
 3-methyl-4-oxo-2-phenyl-4h-1-benzopyran-8-carboxylicaci2-piperidinoethyl
 bladderon
 flaroxatehydrochloride
 genurin
 nsc-114649
 piperidinoethyl-3-methylflavone-8-carboxylatehydrochloride
 spasuret
 FLAVOMYCINPREMIX
 Urispas
 |  | [EINECS(EC#)] 
 223-066-4
 |  | [Molecular Formula] 
 C24H26ClNO4
 |  | [MDL Number] 
 MFCD00072099
 |  | [Molecular Weight] 
 427.92
 |  | [MOL File] 
 3717-88-2.mol
 | 
 | Chemical Properties | Back Directory |  | [Appearance] 
 Crystalline Solid
 |  | [Melting point ] 
 232-234°C
 |  | [storage temp. ] 
 Inert atmosphere,Room Temperature
 |  | [solubility ] 
 H2O: ~6.6 mg/mL
 
 |  | [form ] 
 solid
 
 |  | [color ] 
 white
 
 |  | [Usage] 
 Smooth muscle relaxant. Used as antispasmodic; in treatment of urinary incontinence
 |  | [InChI] 
 InChI=1S/C24H25NO4.ClH/c1-17-21(26)19-11-8-12-20(23(19)29-22(17)18-9-4-2-5-10-18)24(27)28-16-15-25-13-6-3-7-14-25;/h2,4-5,8-12H,3,6-7,13-16H2,1H3;1H
 |  | [InChIKey] 
 XOEVKNFZUQEERE-UHFFFAOYSA-N
 |  | [SMILES] 
 C12OC(=C(C)C(=O)C=1C=CC=C2C(=O)OCCN1CCCCC1)C1C=CC=CC=1.Cl
 |  | [CAS DataBase Reference] 
 3717-88-2(CAS DataBase Reference)
 | 
 | Safety Data | Back Directory |  | [Hazard Codes ] 
 Xn
 |  | [Risk Statements ] 
 R22:Harmful if swallowed.
 R36/37/38:Irritating to eyes, respiratory system and skin .
 |  | [Safety Statements ] 
 S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
 |  | [WGK Germany ] 
 3
 |  | [RTECS ] 
 DJ2450000
 
 |  | [HS Code ] 
 29349990
 |  | [Toxicity] 
 LD50 i.v. in rats:  27.4 mg/kg (Cazzulani)
 | 
 | Hazard Information | Back Directory |  | [Chemical Properties] 
 Flavoxate hydrochloride is Crystalline Solid
 |  | [Originator] 
 Urispas,SKF,US,1971
 |  | [Uses] 
 Antispasmodic;Phosphodiesterase inhibitor
 |  | [Uses] 
 Flavoxate hydrochloride is used as antispasmodic; in treatment of urinary incontinence
 |  | [Definition] 
 ChEBI: The hydrochloride salt of flavoxate.
 |  | [Manufacturing Process] 
 A mixture of 13.3 grams of anhydrous aluminum chloride and 100 ml of
carbon disulfide is added to 19.4 grams of 2-propionyloxybenzoic acid
(prepared from the reaction of propionyl chloride and 2-hydroxybenzoic acid).
After an initial evolution of hydrogen chloride, the solvent is removed by
distillation and the mixture is heated at 150° to 160°C for 4 hours. The cooled
reaction mixture is treated with ice and hydrochloric acid and the product, 2-
hydroxy-3-carboxypropiophenone, is obtained from the oily residue by
distillation in vacuo.
 A mixture of 1.9 grams of 2-hydroxy-3-carboxypropiophenone, 5.0 grams of
sodium benzoate and 20.0 grams of benzoic anhydride is heated at 180° to
190°C for 6 hours. A solution of 15.0 grams of potassium hydroxide in 50 ml
of ethanol and 20 ml of water is added and refluxed for 1 hour. The mixture is
evaporated and the residue after addition of water yields 3-methylflavone-8-
carboxylic acid.
 To a suspension of 12.0 grams of 3-methylflavone-8-carboxylic acid in 200 ml
of anhydrous benzene is added 10.0 grams of thionyl chloride. The mixture is
refluxed for 2 hours during which the suspended solid goes into solution. The
solvent is completely removed by distillation, the residue extracted with
benzene and the extract evaporated to dryness. The product, 3-
methylflavone-8-carboxylic acid chloride, is recrystallized from ligroin to give
crystals melting at 155° to 156°C.
 To 11.0 grams of 3-methylflavone-8-carboxylic acid chloride dissolved in 150
ml of anhydrous benzene is added at room temperature 4.8 grams of
piperidinoethanol and the mixture refluxed for 2 to 3 hours. The separated
solid is filtered, washed with benzene and dried. The product, piperidinoethyl
3-methylflavone-8-carboxylate hydrochloride is obtained as a colorless
crystalline solid, MP 232° to 234°C, (from US Patent 2,921,070).
 |  | [Brand name] 
 Urispas (Ortho-McNeil).
 |  | [Therapeutic Function] 
 Spasmolytic
 |  | [Biological Activity] 
 L-type Ca2+ (Cav1.2) channel inhibitor
 |  | [Side effects] 
 The following adverse reactions have been observed, but there are not enough data to support an estimate of their frequency.
 Gastrointestinal: Nausea, vomiting, dry mouth.
 CNS: Vertigo, headache, mental confusion, especially in the elderly, drowsiness, nervousness.
 Hematologic: Leukopenia (one case which was reversible upon discontinuation of the drug).
 Cardiovascular: Tachycardia and palpitation.
 Allergic: Urticaria and other dermatoses, eosinophilia and hyperpyrexia.
 Ophthalmic: Increased ocular tension, blurred vision, disturbance in eye accommodation.
 Renal: Dysuria.
 |  | [Veterinary Drugs and Treatments] 
 Flovoxate may be considered for treating dogs with detrusor hyperspasticity
(hyperactive bladder, urge incontinence).
 |  | [Pharmacology] 
 Flavoxate hydrochloride counteracts smooth muscle spasm of the urinary tract and exerts its effect directly on the muscle. In a single study of 11 normal male subjects, the time to onset of action was 55 minutes. The peak effect was observed at 112 minutes. 57% of the flavoxate hydrochloride was excreted in the urine within 24 hours.
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