2438-32-6

Basic information

• Product Name: DEXCHLORPHENIRAMINE MALEATE
• Synonyms: (+)-CHLORPHENIRAMINE MALEATE SALT;DEXCHLOROPHENIRAMINE MALEATE;DEXCHLORPHENIRAMINE MALEATE;D-CHLORPHENIRAMINE MALEATE;GAMMA-[4-CHLOROPHENYL]-N,N-DIMETHYL-2-PYRIDINEPROPANAMINE MALEATE SALT;(+)-2-(p-chloro-alpha-(2-(dimethylamino)ethyl)benzyl)pyridinemaleate;(s)-(+)-chlorpheniraminemaleate;dextrochlorpheniraminemaleate
• CAS NO: 2438-32-6
• Molecular Formula: C₄H₄O₄*C₁₆H₁₉ClN₂
• Molecular Weight: 390.86
• EINECS: 204-037-5
• Product Categories: Amines;Chiral Reagents;Heterocycles;Intermediates & Fine Chemicals;Pharmaceuticals;DIDRONEL
• Mol File: 2438-32-6.mol
• Article Data: 7

Chemical Properties

• Melting Point: 112-115 °C(lit.)
• Boiling Point: 379 °C at 760 mmHg
• Flash Point: 183 °C
• Appearance: White solid
• Vapor Pressure: 6.04E-06mmHg at 25°C
• Storage Temp.: Refrigerator
• Solubility: Very soluble in water, freely soluble in ethanol (96 per cent), in methanol and in methylene chloride.
• Merck: 13,2198
• CAS DataBase Reference: DEXCHLORPHENIRAMINE MALEATE(CAS DataBase Reference)
• NIST Chemistry Reference: DEXCHLORPHENIRAMINE MALEATE(2438-32-6)
• EPA Substance Registry System: DEXCHLORPHENIRAMINE MALEATE(2438-32-6)

Safety Data

• Hazard Codes: T
• Statements: 25
• Safety Statements: 36/37/39-45
• RIDADR: UN 2811 6.1/PG 3
• WGK Germany: 3
• RTECS: US6504000
• Hazardous Substances Data: 2438-32-6(Hazardous Substances Data)

Usage

Chemical Properties

White Solid

Originator

Polaramine,Schering,US,1958

Uses

Different sources of media describe the Uses of 2438-32-6 differently. You can refer to the following data:
1. S-(+)-Chlorpheniramine maleate salt has been used to study the anticholinergic effect of Achillea millefolium and Portulaca olerace on muscarinic receptors of guinea pig tracheal smooth muscle.
2. The S-enantiomer of Chlorpheniramine (C424300). Antihistaminic.
3. bone resorption inhibitor, Antihistaminic.

Manufacturing Process

Twenty grams of d-phenylsuccinic acid and 28 grams of 3-(2-pyridyl)-3-pchlorophenyl-N,N-dimethylpropylamine are dissolved in 400 ml of absolute ethyl alcohol and allowed to stand at room temperature until crystallization is effected. The crystals are filtered, washed with absolute ethyl alcohol and recrystallized from 300 ml of this solvent in the same manner. The crystals are recrystallized twice from 80% ethyl alcohol using 3.5 ml per gram of compound in the manner described above and pure d-3-(2-pyridyl)-3-pchlorophenyl-N,Ndimethylpropylamine-d-phenylsuccinate is obtained, melting point 145-147°C.This salt is shaken with 100 ml of diethyl ether and 50 ml of 20% aqueous potassium carbonate; the ether layer is separated, dried over anhydrous potassium carbonate, filtered and the ether is removed in vacuo. The d-3-(2- pyridyl)-3-p-chlorophenyl-N,N-dimethylpropylamine so obtained is a mobile oil.4.3 grams of the above base and 1.8 grams of maleic acid are dissolved in 20 ml isopropyl acetate and kept at room temperature until crystallization is complete. The crystals are filtered, washed with ethyl acetate and recrystallized from 15 ml of this solvent in the same manner. The crystalline d-3-(2-pyridyl)-3-p-chlorophenyl-N,N-dimethylpropylamine maleate so formed is then filtered off and dried. MP 113-115°C from US Patent 3,030,371.

Brand name

Mylaramine (Morton Grove); Polaramine (Schering).

Therapeutic Function

Antihistaminic

General Description

Dexchlorpheniramine(Polaramine) is the dextrorotatory enantiomer of chlorpheniramine.In vitro and in vivo studies of the enantiomers ofchlorpheniramine showed that the antihistaminic activity existspredominantly in the dextro isomer. As mentioned previously,the dextro isomer has the (S) configuration, which issuperimposable on the (S) configuration of the more activelevorotatory enantiomer of carbinoxamine.

Biochem/physiol Actions

H1 histamine receptor antagonist; active isomer.Chlorpheniramine maleate is clinically used as a topical ointment to treat skin disorders such as sunburn, urticaria, angioedema, pruritus and insect bites.

InChI:InChI=1/C16H19ClN2.C4H4O4/c1-19(2)12-10-15(16-5-3-4-11-18-16)13-6-8-14(17)9-7-13;5-3(6)1-2-4(7)8/h3-9,11,15H,10,12H2,1-2H3;1-2H,(H,5,6)(H,7,8)/b;2-1-/t15-;/m0./s1

Upstream product

• 113-92-8 chlorphenamine maleate 

Relevant articles and documents

Preparation of a β-cyclodextrin-based open-tubular capillary electrochromatography column and application for enantioseparations of ten basic drugs

An open-tubular capillary electrochromatography column was prepared by chemically immobilized β-cyclodextrin modified gold nanoparticles onto new surface with the pre-derivatization of (3-mercaptopropyl)-trimethoxysilane. The synthesized nanoparticles and the prepared column were characterized by transmission electron microscopy, scanning electron microscopy, infrared spectroscopy and ultraviolet visible spectroscopy. When the column was employed as the chiral stationary phase, no enantioselectivity was observed for ten model basic drugs. So β-cyclodextrin was added to the background electrolyte as chiral additive to expect a possible synergistic effect occurring and resulting in a better separation. Fortunately, significant improvement in enantioselectivity was obtained for ten pairs of drug enantiomers. Then, the effects of β-cyclodextrin concentration and background electrolyte pH on the chiral separation were investigated. With the developed separation mode, all the enantiomers (except for venlafaxine) were baseline separated in resolutions of 4.49, 1.68, 1.88, 1.57, 2.52, 2.33, 3.24, 1.63 and 3.90 for zopiclone, chlorphenamine maleate, brompheniramine maleate, dioxopromethazine hydrochloride, carvedilol, homatropine hydrobromide, homatropine methylbromide, venlafaxine, sibutramine hydrochloride and terbutaline sulfate, respectively. Further, the possible separation mechanism involved was discussed.

Enantioselective absorption of enantiomers with maleic anhydride-β-cyclodextrin modified magnetic microspheres

Multifunctional magnetic microspheres have enormous potential in diverse fields. In this work, surface chiral-modified magnetic microspheres as chiral selectors, are prepared by polymerizing maleic anhydride-β-cyclodextrin (MAH-β-CD) for the enantioselective absorption of four enantiomers. The successful grafting of MAH-β-CD onto the surface of magnetic microspheres is confirmed by transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and thermogravimetric analysis. The prepared functional microspheres have a three-ply structure with an average particle size of 550 nm and a high saturation magnetization of 60 emu g-1. The amount of MAH-β-CD modified on the P(MBAAm)@Fe3O4 was about 149.1 mg g-1. The analysis results of specific rotation and capillary electrophoresis reveal that the MAH-β-CD-modified Fe3O4 microspheres show stronger complexation of (-)-enantiomers than (+)-enantiomers. In addition, the MAH-β-CD-modified Fe3O4 microspheres have stronger enantioselective absorption for double-ring chiral compounds. These chiral-functionalized magnetic microspheres are therefore expected to be an efficient and economical chiral separation method for use in further research.

Method for preparing dexchlor tannate

The invention pertains to a method for preparing dexchlorpheniramine (“dexchlor”) tannate by reacting dexchlorpheniramine free base at a temperature of about 75 to about 150° C. with tannic acid neat or as an aqueous slurry containing up to about 20 wt. % water. The dexchlorpheniramine free base may be obtained by reacting a commercially available dexchlorpheniramine salt such as dexchlorpheniramine maleate with a base such as aqueous sodium hydroxide. The resultant dexchlor tannate has extended release properties and is useful in pharmaceutical compositions as an antihistamine for human beings.