Losartan
- Product Name
- Losartan
- CAS No.
- 114798-26-4
- Chemical Name
- Losartan
- Synonyms
- LOS;dup89;LOSARTAN;Compound 89;Losartan（base）;Losartan (DUP 89);nyl)-4-yl)methyl)-;Losartan (DuP-753);Losartan USP/EP/BP;LosartanC22H23C1N60
- CBNumber
- CB8120081
- Molecular Formula
- C22H23ClN6O
- Formula Weight
- 422.91
- MOL File
- 114798-26-4.mol
Losartan Property
- Melting point:
- 183-184 C
- Boiling point:
- 682.0±65.0 °C(Predicted)
- Density
- 1.35±0.1 g/cm3(Predicted)
- vapor pressure
- 0.002Pa at 20℃
- storage temp.
- under inert gas (nitrogen or Argon) at 2-8°C
- solubility
- DMSO (Slightly), Methanol (Slightly)
- form
- Solid
- pka
- 5-6(at 25℃)
- color
- White to Off-White
- Water Solubility
- 4.8mg/L at 20℃
- LogP
- 1.1 at 20℃
- CAS DataBase Reference
- 114798-26-4(CAS DataBase Reference)
- EPA Substance Registry System
- 1H-Imidazole-5-methanol, 2-butyl-4-chloro-1-[[2'-(2H-tetrazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]- (114798-26-4)
Safety
- Hazard Codes
- Xi
- Risk Statements
- 36/37/38
- Safety Statements
- 26-36
- Hazardous Substances Data
- 114798-26-4(Hazardous Substances Data)
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H317May cause an allergic skin reaction
H362May cause harm to breast-fed children
- Precautionary statements
-
P202Do not handle until all safety precautions have been read and understood.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P263Avoid contact during pregnancy/while nursing.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P308+P313IF exposed or concerned: Get medical advice/attention.
N-Bromosuccinimide Price
- Product number
- L470470
- Product name
- Losartan
- Packaging
- 500mg
- Price
- $385
- Updated
- 2021/12/16
- Product number
- orb134724
- Product name
- Losartan
- Purity
- >99%
- Packaging
- 1g
- Price
- $606.9
- Updated
- 2021/12/16
- Product number
- D34052
- Product name
- Losartan-d6HCl
- Packaging
- 5mg
- Price
- $1500
- Updated
- 2021/12/16
- Product number
- CS-2116
- Product name
- Losartan
- Purity
- 99.55%
- Packaging
- 500mg
- Price
- $50
- Updated
- 2021/12/16
- Product number
- BL164640
- Product name
- Losartan
- Packaging
- 100mg
- Price
- $50
- Updated
- 2021/12/16
Losartan Chemical Properties,Usage,Production
Originator
Alsartan, Aristo Pharmaceutical Ltd., India
Uses
Losartan is a nonpeptide angiotensin II AT1-receptor antagonist. Antihypertensive.
Uses
antihypertensive;antagonist of angiotensin type 1
Definition
ChEBI: A biphenylyltetrazole where a 1,1'-biphenyl group is attached at the 5-position and has an additional trisubstituted imidazol-1-ylmethyl group at the 4'-position
Manufacturing Process
2-Butyl-4-chloro-1-(2'-(tetrazol-5-yl)biphenyl-4-ylmethyl)-1H-imidazole-5- methanolpotassium was synthesized in 5 stages.
1. Methyl 4'-methylbiphenyl-2-carboxylate (44.2 mmol), 0.5 N KOH in methanol (133 mmol), and water (50 mL) were mixed and refluxed under nitrogen. After 5 hours, the solvent was removed in vacuo and water (200 mL) and ethyl acetate (200 mL) added. The aqueous layer was acidified with concentrated hydrochloric acid to a pH of 3 and the layers were separated. The aqueous phase was extracted with ethyl acetate, the organic layers collected, dried (MgSO4) and the solvent removed in vacuo to yield 8.71 g of a 4'-methylbiphenyl-2-carboxylic acid, melting point 140.0-145.0°C.
2. 4'-Methylbiphenyl-2-carboxylic acid (41 mmol) and thionyl chloride (411 mmol) were mixed and refluxed for 2 hours. The excess thionyl chloride was removed in vacuo and the residue was taken up in toluene. The toluene was removed by rotary evaporation. The crude acid chloride was then added slowly to cold (0°C) concentrated NH4OH (50 mL) so that the temperature was kept below 15°C. After 15 minutes of stirring, water (100 mL) was added and solids precipitated. These were collected, washed with water and dried under high vacuum over P2O5 to yield 7.45 g of a white solid, melting point 126.0-128.5°C. The above product amide (35 mmol) and thionyl chloride (353 mmol) were mixed and refluxed for 3 hours. The thionyl chloride was removed using the same procedure as described above. The residue was washed with a little hexane to yield 6.64 g of 4'-methyl-2-cyanobiphenyl, melting point 44.0- 47.0°C.
3. 4'-Methyl-2-cyanobiphenyl (5.59 g) was brominated using benzoyl peroxide as an initiator. The product was recrystallized from ether to yield 4.7 g of 4'- bromomethyl-2-cyanobiphenyl, melting point 114.5-120.0°C.
4. 4'-Bromomethyl-2-cyanobiphenyl (4.6 g) was alkylated onto 2-n-butyl-4-
chloro-5-(hydroxymethyl)-imidazole. For separation of the product was used a
flash chromatography in 1:1 hexane/ethyl acetate over silica gel. The
regioisomeric products yielded 2.53 g of the faster eluting isomer.
Recrystallization from acetonitrile yielded 1.57 g of analytically pure 2-n-butyl4-chloro-1-[2'-cyanobiphenyl-4-yl)methyl]-5-(hydroxymethyl)-imidazole,
melting point 153.5 -155.5°C.
5. 2-n-Butyl-4-chloro-1-[(2'-cyanobiphenyl-4-yl)-methyl]-5-(hydroxymethyl)-
imidazole (10 mmole), sodium azide (10 mmol), and ammonium chloride (30
mmol) were mixed in DMF (150 mL) under N2 at 100°C for 2 days, after
which the temperature was raised to 120°C for 6 days. The reaction was
cooled and 3 more equivalents each of ammonium chloride and sodium azide
were added. The reaction was again heated for 5 days at 120°C. The reaction
was cooled, the inorganic salts filtered, and the filtrate solvent removed in
vacuo. Water (200 mL) and ethyl acetate (200 mL) were added to the residue
and the layers were separated. The aqueous layer was extracted with ethyl
acetate, the organic layers were collected, dried (MgSO4) and the solvent
removed in vacuo, to yield a dark yellow oil. The product was purified by flash
chromatography in 100% ethyl acetate to 100% ethanol over silica gel to
yield 5.60 g of a light yellow 2-n-butyl-4-chloro-5-hydroxymethyl-1-[(2'-(1Htetrazol-5-yl)biphenyl-4-yl)methyl]imidazole. Recrystallization from acetonitrile
yielded 4.36 g of light yellow crystals which still melted broadly. The crystals
were taken up in 100 mL of hot acetonitrile. The solid that did not dissolve
was filtered off to yield 1.04 g of product as a light yellow solid, melting point
of 2-n-butyl-4-chloro-5-hydroxymethyl-1-[(2'-(1H-tetrazol-5-yl)biphenyl-4-
yl)methyl]imidazole 183.5-184.5°C.
2-n-Butyl-4-chloro-5-hydroxymethyl-1-[(2'-(1H-tetrazol-5-yl)biphenyl-4-
yl)methyl]imidazole may be converted to potassium salt.
brand name
Cozaar (Merck).
Therapeutic Function
Antihypertensive
General Description
Losartan, 2-butyl-4-chloro-1-[p-(o-1H-tetrazol-5-yl-phenyl)benzyl]imidazole-5-methanol monopotassiumsalt (Cozarr), was the first nonpeptide imidazole to beintroduced as an orally active angiotensin II antagonist withhigh specificity for AT1. When administered to patients, itundergoes extensive first-pass metabolism, with the 5-methanol being oxidized to a carboxylic acid. This metabolismis mediated by CYP 2C9 and 3A4 isozymes. The 5-methanol metabolite is approximately 15 times more potentthan the parent hydroxyl compound. Because the parent hydroxylcompound has affinity for the AT1 receptor, strictlyspeaking, it is not a prodrug.
Flammability and Explosibility
Non flammable
Losartan Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from Losartan manufacturers
- Product
- Losartan 114798-26-4
- Price
- US $0.00-0.00/Kg/Bag
- Min. Order
- 1Kg/Bag
- Purity
- 99% up, High Density
- Supply Ability
- 20 tons
- Release date
- 2024-06-27
- Product
- Losartan 114798-26-4
- Price
- US $10.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 10 mt
- Release date
- 2024-11-22
- Product
- Losartan 114798-26-4
- Price
- US $238.00/Kg/Bag
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 1T
- Release date
- 2021-06-03