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ALOSETRON

ALOSETRON Suppliers list
Company Name: Hubei Jusheng Technology Co.,Ltd.
Tel: 86-18871470254
Email: linda@hubeijusheng.com
Products Intro: Product Name:alosetron
CAS:122852-42-0
Purity:0.99 Package:5KG;1KG Remarks:C17H18N4O
Company Name: HENAN BON INDUSTRIAL CO.,LTD
Tel: 0371-55170695
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Products Intro: CAS:122852-42-0
Purity:0.99 Package:25KG;5KG;1KG;500G
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Products Intro: Product Name: ALOSETRON
CAS:122852-42-0
Purity:85.0-99.8% Package:1KG;1USD
Company Name: Shaanxi Dideu Medichem Co. Ltd
Tel: 13772537765
Email: 1010@dideu.com
Products Intro: Product Name:Alosetron
CAS:122852-42-0
Purity:99% Package:1g;1USD|10g;1USD|100g;1USD|1KG;1USD|25KG;1USD
Company Name: Zhuozhou Wenxi import and Export Co., Ltd
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Products Intro: Product Name:Alosetron
CAS:122852-42-0
Purity:99%+ HPLC Package:1KG;15USD|100KG;12USD|1000KG;10USD

ALOSETRON manufacturers

  • ALOSETRON USP/EP/BP
  • $1.10 / g
  • 2021-08-04
  • CAS:122852-42-0
  • Min. Order: 1g
  • Purity: 0.999
  • Supply Ability: 100 Tons min
  • Alosetron
  • $1.00-1.00 / KG
  • 2021-07-20
  • CAS:122852-42-0
  • Min. Order: 1g
  • Purity: 99%
  • Supply Ability: 50tons
  • Alosetron
  • $15.00-10.00 / KG
  • 2021-07-13
  • CAS:122852-42-0
  • Min. Order: 1KG
  • Purity: 99%+ HPLC
  • Supply Ability: Monthly supply of 1 ton
ALOSETRON Basic information
Product Name:ALOSETRON
Synonyms:ALOSETRON;ALOSETRON 2,3,4,5-Tetrahydro-5-methyl-2-((5-methyl-1H-imidazol-4-yl)methyl)-1H-pyrido(4,3-b)indol-1-one;5-Methyl-2-[(4-methyl-1H-imidazol-5-yl)methyl]-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indol-1-one;5-METHYL-2-[(5-METHYL-1H-IMIDAZOL-4-YL)METHYL]-3,4-DIHYDROPYRIDO[4,3-B]INDOL-1-ONE;GR-68755X;GR-68755;Alosetron (GR-68755X;GR 68755; GR 68755X; LOTRONEX;GR-68755;GR68755;1H-Pyrido[4,3-b]indol-1-one, 2,3,4,5-tetrahydro-5-methyl-2-[(4-methyl-1H-imidazol-5-yl)methyl]-
CAS:122852-42-0
MF:C17H18N4O
MW:294.35
EINECS:
Product Categories:
Mol File:122852-42-0.mol
ALOSETRON Structure
ALOSETRON Chemical Properties
Melting point 238-240 °C
Boiling point 648.1±55.0 °C(Predicted)
density 1.34±0.1 g/cm3(Predicted)
pka14.10±0.10(Predicted)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-36
MSDS Information
ALOSETRON Usage And Synthesis
Chemical Propertiescrystalline powder
OriginatorAlosetron hydrochloride,GlaxoSmithKline
UsesAnti-emetic.
IndicationsAlosetron (Lotronex) is a 5-HT3 receptor antagonist. Blocking this receptor results in decreased GI motility. Alosetron received FDA approval in February 2000 for the treatment of women with diarrhea-predominant IBS. In November 2000, at the request of the FDA, the drug was voluntarily withdrawn due to reported cases of ischemic colitis, including some fatalities.
DefinitionChEBI: A pyrido[4,3-b]indole compound having a 5-methyl-1H-imidazol-4-ylmethyl group at the 2-position.
Manufacturing Process4-(Chloromethyl)-1-(triphenylmethyl)-1H-imidazole.
Thionyl chloride (0.829 g) was added over 1 min to a stirred suspension of 1- (triphenylmethyl)-1H-imidazole-4-methanol (1.3 g) in a mixture of dichloromethane (50 ml) and DMF (1.0 ml) at 23°C. The solution so obtained was stirred for 15 min. and extracted with 8% sodium bicarbonate solution (80 ml). The organic phase was washed with water (50 ml), dried and evaporated to give an oil which solidified. The solid was slurried in hexane and filtered to give the title compound (1.28 g), m.p. 139-141°C.
3,4-Dihydro-4-methylcyclopent[b]indol-1(2H)-one oxime.
3,4-Dihydro-4-methylcyclopent[b]indol-1(2H)-one (1.7 g) and hydroxylamine hydrochloride (1.925 g) in pyridine were heated at 60°C for 18 h and cooled. The reaction mixture was evaporated in vacuo to a residue to which was added 8% sodium bicarbonate (150 ml). Extraction with ethyl acetate (300 ml) produced a suspension in the organic layer; this layer and associated solid was separated from the aqueous layer. The aqueous layer was re-extracted with ethyl acetate (250 ml). The combined organic extracts (and suspended solid) were evaporated to a residue, boiled with a mixture of ethanol (150 ml) and methanol (150 ml) and cooled to 50°C. The residue was adsorbed from this solution on to FCC silica and applied to an FCC column. Elution with ethyl acetate/3-10% methanol provided the title compound (1.69 g), m.p. 219- 224°C (decomp.).
2,3,4,5-Tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one.
3,4-Dihydro-4-methylcyclopent[b]indol-1(2H)-one oxime (1.53 g), polyphosphoric acid (409 g) and dioxan (15 ml) were heated at 110-120°C for 2.2 h under nitrogen. The reaction mixture was cooled, and treated with 2 N sodium carbonate solution (1 L). The suspension was extracted with ethyl acetate (4x400 ml) and the combined extracts were dried. Evaporation gave a solid (1.43 g) which was recrystallised from ethyl acetate/cyclohexane. This solid was purified by FCC, eluting with dichloromethane:ethanol:ammonia solution (200:10:1) to give a solid (1.26 g) which was recrystallised from ethanol to provide the title compound (960 mg), m.p. 234-238°C.
2,3,4,5-Tetrahydro-5-methyl-2-[(5-methyl-1H-imidazol-4-yl)methyl]-1Hpyrido[ 4,3-b]indol-1-one maleate.
A mixture of 2,3,4,5-tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one (0.6 g) and 78% sodium hydride dispersion in mineral oil (0.109 g) in dry DMF (15 ml) was stirred under nitrogen at 50°C until hydrogen evolution ceased (ca. 1.5 h). The mixture was cooled to 40°C and a solution of 4-(chloromethyl)-5- methyl-1-(triphenylmethyl)-1H-imidazole (1.12 g) in dry THF (15 ml) was added. The reaction was then stirred at 40°C for 3 h, at 20°C for 16 h and a further portion of 4-(chloromethyl)-5-methyl-1-(triphenylmethyl)-1H-imidazole (1.12 g) in dry THF (15 ml) was added. The resulting mixture was heated at 40°C for 3 h, quenched with water (20 ml) and acetic acid (20 ml), and heated at 100°C for 2 h. The mixture was then concentrated in vacuo to ca. 60 ml, diluted with 1 M hydrochloric acid (40 ml) and washed with ethyl acetate (3x50 ml). The organic phase was discarded and the acidic aqueous phase was basified (pH=9) with potassium carbonate and extracted with ethyl acetate:ethanol (20:1; 3x100 ml). The extracts were combined, dried and evaporated to give a brown gum (ca. 1 g). This gum was adsorbed onto silica and purified by FCC eluting with dichloromethane:ethanol:ammonia solition (100:8:1) to give a pale brown solid (0.8 g); m.p. 238-240°C (decomp.). This solid was dissolved in a mixture of (hot ethanol and methanol (1:1; 100 ml) and treated with an ethanolic solution of maleic acid (3.18 g). The resulting solution was concentrated to ca. 20 ml and diluted with dry diethyl ether (ca. 8 ml) to precipitate the title compound (0.75 g) as an off-white solid melting point 160-162°C. Hydrochloride may be prepared by treating the above solid with an equivalent of an ethanolic solution of HCl.
Brand nameLotronex (GlaxoSmithKline).
Therapeutic FunctionAntidiarrheal
Tag:ALOSETRON(122852-42-0) Related Product Information
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