Anti-influenza virus Uses
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Oseltamivir phosphate

Anti-influenza virus Uses
Product Name
Oseltamivir phosphate
CAS No.
204255-11-8
Chemical Name
Oseltamivir phosphate
Synonyms
Osteltamivir phosphate;Oseltamivir Phosphate (200 mg);(3R,5S)-ethyl 4-acetamido-5-amino-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate phosphate;(3R,4R,5S)-ethyl 4-acetaMido-5-aMino-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate phosphate;SOT;Oselt;CS-1978;Oseltamivir PH;US-DMF No.: 035876;OseltaMir phosphate
CBNumber
CB2119221
Molecular Formula
C16H31N2O8P
Formula Weight
410.4
MOL File
204255-11-8.mol
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Oseltamivir phosphate Property

Melting point:
196-198°C
storage temp. 
2-8°C
solubility 
H2O: soluble30mg/mL, clear
form 
powder
color 
white to beige
optical activity
[α]/D -26 to -36°, c = 1 in H2O
Water Solubility 
Soluble in water (75 mM)
BCS Class
1 (CLogP), 3 (LogP)
InChI
InChI=1/C16H28N2O4.H3O4P/c1-5-12(6-2)22-14-9-11(16(20)21-7-3)8-13(17)15(14)18-10(4)19;1-5(2,3)4/h9,12-15H,5-8,17H2,1-4H3,(H,18,19);(H3,1,2,3,4)/t13-,14+,15+;/s3
InChIKey
PGZUMBJQJWIWGJ-IFAKAUOZSA-N
SMILES
[C@@H]1(OC(CC)CC)C=C(C[C@H](N)[C@H]1NC(=O)C)C(=O)OCC.OP(O)(O)=O |&1:0,10,12,r|
CAS DataBase Reference
204255-11-8(CAS DataBase Reference)
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Safety

HazardClass 
IRRITANT
HS Code 
2924299500
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H317May cause an allergic skin reaction

H319Causes serious eye irritation

H412Harmful to aquatic life with long lasting effects

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
PHR1781
Product name
Oseltamivir phosphate
Purity
Pharmaceutical Secondary Standard; Certified Reference Material
Packaging
500mg
Price
$179
Updated
2024/03/01
Sigma-Aldrich
Product number
1479304
Product name
Oseltamivir phosphate
Purity
United States Pharmacopeia (USP) Reference Standard
Packaging
200mg
Price
$572
Updated
2024/03/01
Cayman Chemical
Product number
16070
Product name
Oseltamivir (phosphate)
Purity
≥98%
Packaging
100mg
Price
$49
Updated
2024/03/01
Cayman Chemical
Product number
16070
Product name
Oseltamivir (phosphate)
Purity
≥98%
Packaging
250mg
Price
$115
Updated
2024/03/01
Sigma-Aldrich
Product number
Y0001337
Product name
Oseltamivir phosphate (impurity B free)
Purity
European Pharmacopoeia (EP) Reference Standard
Packaging
y0001337
Price
$220
Updated
2024/03/01
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Oseltamivir phosphate Chemical Properties,Usage,Production

Anti-influenza virus

Oseltamivir phosphate is a kind of anti-influenza drugs, under the trade name Tamiflu. Its appearance exhibits as white to yellowish-white powder. It can be divided into type A (alpha) and B (Beta) selective inhibitor of the influenza virus neuraminidase and can prevent the release of virus from infected cells, through inhibiting the activity of the influenza virus neuraminidase, thus achieving the purpose of control of influenza symptoms. Clinically it can be used for treatment of the type A influenza and type B influenza in adults and children of 1 year old or over 1 year old as well as the clinical prevention of influenza A and B in adult and adolescent of 13 year old or over 13 years old.

Oseltamivir phosphate can subject to rapid metabolism into oselatamivr carboxylate after gastrointestinal absorption with 75% of the total oral administrated dose participating in the systemic circulation in the from of oselatamivr carboxylate. The active ingredient of this drug is a potent and unique neuraminidase inhibitors acting on all the processes of influenza virus infection, preventing the replication of all clinically relevant influenza virus strains A or B strain. It has obvious inhibitory effect even in nanomolar concentration in vitro. It has ben observed in vitro that the active metabolite can inhibit the growth of influenza virus as well as in vivo that it can inhibit the replication and pathogenicity of influenza virus. This product, through inhibiting the release of virus from infected cells, can reduce the spread of influenza A or B virus.
The above information is edited by the chemicalbook of Dai Xiongfeng.

Uses

Oseltamivir Phosphate is an orally active inhibitor of influenza virus neuraminidase; converted in vivo to the active acid metabolite. An antiviral drug. It is a COVID19-related research product.

Description

Oseltamivir phosphate (Tamiflu) was launched in the US and Switzerland for the treatment of influenza infections by all common strain viruses. It is an oral anti-viral drug approved for the treatment of acute, uncomplicated influenza in patients 2 weeks of age and older whose flu symptoms have not lasted more than two days. This product is approved to treat Type A and B influenza; however, the majority of patients included in the studies were infected with type A, the most common in the U.S. Efficacy of Tamiflu in the treatment of influenza in subjects with chronic cardiac disease and/or respiratory disease has not been established.

Chemical Properties

White Cyrstalline Solid. It is freely soluble in water.

Originator

Gilead (US)

Uses

Oseltamivir phosphate (Tamiflu) is a competitive neuraminidase inhibitor. The prodrug oseltamivir phosphate (Tamiflu) is itself not virally effective; however, once in the liver, it is converted by natural chemical processes, hydrolysed hepatically to its

Definition

ChEBI: Oseltamivir phosphate is a phosphate salt. It contains an oseltamivir. It is an acetamido cyclohexene that is a structural homolog of SIALIC ACID and inhibits NEURAMINIDASE.

Preparation

Oseltamivir phosphate (Tamiflu) has been synthesized from cis-2,3-bis(hydroxymethyl)aziridine. After protection of the cis-2,3-bis(hydroxymethyl)aziridine with a Boc group, desymmetrization provided a chiral aziridine, which was a key intermediate to install the required stereogenic center containing a nitrogen atom. Allylation and ring closing metathesis are the key reactions to obtain the cyclic product that was successfully converted to the desired oseltamivir phosphate. DOI: 10.1021/jo3015853

It can also be obtained by a novel 12-step synthesis from (-)-quinic acid.

brand name

Tamiflu (Roche).

Therapeutic Function

Antiviral

General Description

receptor site showed clearly that additional binding sitesexist for the C-5 acetamido carbonyl group and the arginineresidue at position 152 of the receptor site. In addition, the C-2 carboxyl group of sialic acid binds to Arg 118, Arg 292, andArg 371. Position C-6 is capable of undergoing a hydrophobicinteraction with various amino acids, including Glu, Ala,Arg, and Ile. Maximum binding to neuraminidase occurswhen the C-6 substituent is substituted with a nonpolar chain.In oseltamivir, this nonpolar group is 3-pentyl. An importantfeature of oseltamivir is the ethyl ester, which makes the drugorally efficacious. This drug is the first orally active agent foruse against influenza A and B. It is also indicated for the treatmentof acute illness. If administered within 2 days after theonset of influenza symptoms, the drug is effective.

Biochem/physiol Actions

Oseltamivir phosphate is an influenza viral neuraminidase inhititor. Oseltamivir phosphate, an antiviral, is used clinically to treat influenza A and influenza B, and to prevent flu after exposure. Oseltamivir phosphate is hydrolyzed in the liver to its active form, oseltamivir carboxylate, which is an inhibitor of influenza viral neuraminidases essential for viral replication. Oseltamivir has a broad spectrum of activity against a range of influenza A and B subtypes with IC50 values for neuraminidases measured from less than 1 nM to approximately 30 nM, depending on the virus subtype.

Clinical Use

Oseltamivir was approved as the first orally administered neuraminidase inhibitor used against influenza A and B viruses. The drug is indicated for the treatment of uncomplicated acute illness caused by influenza infection.

Side effects

Side effects with oseltamivir are minor, consist of nausea and vomiting, and occur primarily in the first two days of therapy.

Veterinary Drugs and Treatments

Although, there is no research published (at the time of writing— January 2007) documenting oseltamivir safety or efficacy in dogs or cats, there is much interest and discussion regarding its potential for the adjunctive treatment of parvovirus infections in dogs. It may be of benefit for adjunctive treatment of other viral infections, particularly those with associated secondary bacterial components, but research or experience is lacking. A recent study performed in horses, experimentally infected with equine influenza A (H3N8), documented some efficacy in the attenuation of clinical signs (pyrexia), viral shedding, and secondary bacterial pneumonias (Yamanaka, Tsujimura et al. 2006).
Because oseltamivir is the primary antiviral agent proposed for treatment or prophylaxis for an H5N1 influenza (“bird flu”) pandemic in humans, its use in veterinary patients is controversial, particularly due to concerns of adequate drug supply for the human population and the potential for influenza virus resistance development. In 2006, the FDA banned the extra-label use of oseltamivir and other influenza antivirals in chickens, turkeys and ducks. At the time of writing, its use is still allowed in mammal veterinary patients, but veterinarians should use the drug prudently and be cognizant of these public health concerns.

Metabolism

Oseltamivir is readily absorbed from the GI tract following oral administration. It is a prodrug that is extensively metabolized in the liver, undergoing ester hydrolysis to the active carboxylic acid. Two oxidative metabolites also have been isolated, with the major oxidation product being the ω-carboxylic acid.

storage

-20°C

Clinical claims and research

Oseltamivir is the ethyl ester prodrug of GS-4071, the corresponding acid, which is one of the most potent inhibitors of both influenza A and B virus neuraminidase (sialidase) isoenzymes; these glycoproteins are expressed on the virion surface and are essential for virus replication for both A and B strains. Oseltamivir emerged as one of the first two neuraminidase inhibitors to reach the market. GS-4071 demonstrated a low (< 5%) oral bioavailability in animals due to a poor absorption from the gastrointestinal barrier; by incorporating a more lipophilic ester group, the oral bioavailabilty can reach 30 to 100% in mice, rats and dogs. Following oral administration of Oseltamivir in rats, a similar concentration of GS-4071 was found in the bronchoalveolar lining fluid and the plasma which indicated a good penetration of the active compound into the lower respiratory tract. In mice, chickens and ferrets, orally administered Oseltamivir was found to have significant inhibitory effects on A and B influenza infections in protecting against a lethal challenge of virus and lessening virus titer in the lungs or nasal washings. In several clinical trials with patients receiving oral capsules daily, Oseltamivir was shown to be effective in reducing significantly the duration and severity of the clinical symptoms, including fever, cough and general malaise, in both early treatment and prevention.

Mode of action

Oseltamivir Phosphate is the phosphate salt of oseltamivir, a synthetic derivative prodrug of ethyl ester with antiviral activity. By blocking neuraminidases on the surfaces of influenza viruses, oseltamivir interferes with host cell release of complete viral particles.

Oseltamivir phosphate Preparation Products And Raw materials

Raw materials

Preparation Products

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Oseltamivir phosphate Suppliers

Hunan Eurasian Pharmaceutical Co. Ltd.
Tel
0592-5789919 13328776692
Email
2851802016@qq.com
Country
China
ProdList
66
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Varnor Chemical Co., Ltd.
Tel
0796-8330061 18779971813
Fax
0086-796-8330061
Email
sales@varnorchem.com
Country
China
ProdList
21
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INTERCHEMIE NANJING PHARMATECH CO., LTD
Tel
13656237714 13656237714
Fax
0512-65852853
Email
xiaokunfu@kyyykj.com
Country
China
ProdList
310
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Tianjin shijia biomedical technology co., LTD
Tel
15022261580;411316762
Email
tjshj1212@163.com
Country
China
ProdList
2254
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58
Shanghai Gukang Biotechnology Co., LTD
Tel
021-34080528 13564510648
Fax
021-54301252
Email
info@kanghaopharm.com
Country
China
ProdList
123
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58
Hangzhou Runyan Medical Technology Co., LTD
Tel
13989459766 18112526015
Email
sales@runyanpharma.com
Country
China
ProdList
369
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58
Shandong Mingfeng Pharmaceutical and Technology Co. Ltd
Tel
-1345456643 15315114555
Fax
QQ:1345456643
Email
1345456643@qq.com
Country
China
ProdList
248
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Shanghai Boyle Chemical Co., Ltd.
Tel
Fax
86-21-57758967
Email
sales@boylechem.com
Country
China
ProdList
2923
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55
J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Fax
86-10-82849933
Email
jkinfo@jkchemical.com
Country
China
ProdList
96815
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76
Chembest Research Laboratories Limited
Tel
021-20908456
Fax
021-58180499
Email
sales@BioChemBest.com
Country
China
ProdList
6013
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61
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View Lastest Price from Oseltamivir phosphate manufacturers

Zibo Wei Bin Import & Export Trade Co. Ltd.
Product
Oseltamivir phosphate 204255-11-8
Price
US $0.00-0.00/kg
Min. Order
0.1kg
Purity
98%
Supply Ability
1t
Release date
2023-12-08
Sinoway Industrial co., ltd.
Product
Oseltamivir Phosphate 204255-11-8
Price
US $0.00/KG
Min. Order
2KG
Purity
99% up, High Density
Supply Ability
20 tons
Release date
2021-07-07
Hebei Yanxi Chemical Co., Ltd.
Product
Oseltamivir phosphate 204255-11-8
Price
US $90.00-80.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
2000kgs
Release date
2024-03-22

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