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Telmisartan

CAS No.
144701-48-4
Chemical Name:
Telmisartan
Synonyms
MICARDIS;TU-199;TIMISHATAN;Telmisaran;2-(4-{[4-Methyl-6-(1-Methyl-1H-1,3-benzodiazol-2-yl)-2-propyl-1H-1,3-benzodiazol-1-yl]Methyl}phenyl)benzoic acid;Telmisartan,4′[(1,4′-Dimethyl-2′-propyl[2,6′-bi-1H-benzimidazol]-1′-yl)methyl][1,1′-biphenyl]-2-carboxylic acid, BIBR 277;PRITOR;BIBR 277;misartan;BIBR 277SE
CBNumber:
CB4266172
Molecular Formula:
C33H30N4O2
Molecular Weight:
514.62
MDL Number:
MFCD00918125
MOL File:
144701-48-4.mol
MSDS File:
SDS
Last updated:2024-03-14 18:29:10

Telmisartan Properties

Melting point 261-263°C
Boiling point 771.9±70.0 °C(Predicted)
Density 1.16
RTECS DV2037500
storage temp. 2-8°C
solubility DMSO: >5 mg/mL at 60 °C
pka 3.86±0.36(Predicted)
form solid
color white
Water Solubility insoluble
Merck 14,9129
BCS Class 2
Stability Hygroscopic
InChIKey RMMXLENWKUUMAY-UHFFFAOYSA-N
SMILES C1(C2=CC=C(CN3C(CCC)=NC4=C(C)C=C(C5N(C)C6=CC=CC=C6N=5)C=C43)C=C2)=CC=CC=C1C(O)=O
CAS DataBase Reference 144701-48-4(CAS DataBase Reference)
FDA UNII U5SYW473RQ
ATC code C09CA07

Pharmacokinetic data

Protein binding >99.5%
Excreted unchanged in urine >1%
Volume of distribution 500 Litres
Biological half-life 24 / Unchanged

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS07
Signal word  Warning
Hazard statements  H315-H319-H335
Precautionary statements  P261-P264b-P271-P280-P302+P352-P304+P340-P305+P351+P338-P312-P362+P364-P403+P233-P501c
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  22-24/25-36-26
WGK Germany  2
HS Code  2933995300

Telmisartan price More Price(53)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich PHR1855 Telmisartan Pharmaceutical Secondary Standard; Certified Reference Material 144701-48-4 500mg $214 2024-03-01 Buy
Sigma-Aldrich 1643419 Telmisartan United States Pharmacopeia (USP) Reference Standard 144701-48-4 200mg $436 2024-03-01 Buy
TCI Chemical T2861 Telmisartan >98.0%(HPLC)(T) 144701-48-4 1g $144 2024-03-01 Buy
TCI Chemical T2861 Telmisartan >98.0%(HPLC)(T) 144701-48-4 5g $358 2024-03-01 Buy
Alfa Aesar J61441 Telmisartan, 99% 144701-48-4 250mg $69.8 2023-06-20 Buy
Product number Packaging Price Buy
PHR1855 500mg $214 Buy
1643419 200mg $436 Buy
T2861 1g $144 Buy
T2861 5g $358 Buy
J61441 250mg $69.8 Buy

Telmisartan Chemical Properties,Uses,Production

Chemical Properties

White or off-white crystalline powder, odorless and tasteless. Soluble in chloroform, slightly soluble in methanol, very slightly soluble in acetone, practically insoluble in water. Slightly soluble in 0.1mol/L hydrochloric acid, soluble in 0.1mol/L sodium hydroxide.
Absorption coefficient(E1%1cm):509~541

Mechanisms of Action

80mg of telmisartan for the human body will practically completely counter the high blood pressure caused by angiotension II. Effects will last for 24 and can still be detected within 48 hours. Blood pressure-lowering effects should gradually become apparent within 3 hours after the initial dose. If treatment is suddenly interrupted, blood pressure will return to the same level as before treatment in a matter of days, and there will be no rebound high blood pressure. In a clinical trial that compared two kinds of antihypertensive drugs, patients in the treatment group experienced lower rates of coughing than those in the group treated by angiotensin converting enzyme inhibitors.
Telmisartan has a half-life of 18~24 hours, and will take effect 1~4 hours after taken. Medicinal effects can last for as long as 35 hours, with a high (T/P) ratio and outstanding effects in controlling morning blood pressure. Thus, this medicine can effectively control blood pressure for 24 hours, and it meets the once-daily medicinal standard (40~80mg, qd).
Clinical effects and characteristics:

  • Pharmacokinetics show: Rapid effects (0.3h), long duration (35.4h), little effect on heart rate when lowering blood pressure.
  • Compared to Enalapril: Stronger antihypertensive effects than Enalapril; when both are used in combination with diuretics, Telmisartan still appears to be superior and results in a lower coughing rate.
  • Compared to Lisinopril: More apparent antihypertensive effects (for both systolic and diastolic blood pressure), coughing rate for Telmisartan (16%) is drastically lower than that of Lisinopril (60%).
  • Compared to Atenolol: Similar antihypertensive effects, lower rate of side effects (impotence and fatigue).
  • Compared to Amlodipine: The Telmisartan group experienced noticeably lower heart rates four hours after ingestion and from six a.m. to twelve p.m.
Overall, Telmisartan has the following characteristics in comparison with other antihypertensive medicine: specific receptor effects, noticeable hypertensive effects, good diuretic effects, improvement of myocardial stenosis, safe usage, good tolerance, and convenient daily dosage.

Side Effects

In the placebo control experiment, the incidence rate of negative events for the Telmisartan group (41.4%) was similar to that of the placebo group (43.9%). Negative events were unrelated to dosage, sex, age, or race.
The following lists negative reactions were accumulated via the 5788 hypertensive patients that were treated with Telmisartan in the clinical trial.
Negative effects are categorized by incident rate as:
Very common (>1/10); common (>1/100, <1/10=); uncommon (>1/1000, <1/100=); rare (>1/10000, <1/1000=); very rare (<1/100000=)
Bodily reaction: Common: Back pain (e.g. sciatica), chest pain, flu-like symptoms, infection symptoms (e.g. urinary tract infection including cystitis). Uncommon: sight abnormality, sweating.
Central and peripheral nervous system: Common: vertigo.
Digestive system: Common: stomach pain, diarrhea, indigestion, gastrointestinal disorders. Rare: dry mouth, bloating.
Muscle skeletal system: Common: joint pain, leg cramps or leg pain, muscle pain. Rare: Tenosensitis symptoms.
Nervous system: Rare: anxiety.
Respiratory system: Common: upper respiratory tract infection, including pharyngitis and rhinitis.
Skin and accessory system: Common: Skin abnormalities such as eczema.
Additionally, since Telmisartan entered the market, there have been individual cases of erythema, itching, syncope, insomnia, depression, stomach discomfort, vomiting, hypotension, bradycardia, tachycardia, dyspnea, eosinophilia, thrombocytopenia, weakness, and reduced work efficiency. Similar to other angiotensin II receptor blockers, very few cases have reported vascular edema, nettles, and other negative reactions.
The laboratory found: compared to the placebo, the Telmisartan group occasionally exhibited lowered hemoglobin or raised uric acid. Any increase in serum creatinine or liver enzymes in the Telmisartan group was similar or lower than that of the placebo group.

Patent

Telmisartan was originally formulated by the German pharmaceutical company Boehringer Ingelheim; it earned the German patent EP502,314 in 1991, was first approved to enter the American market in November 1998, and then entered German, Philippines, Australian, Belgium, British, and other markets.

Description

Telmisartan is an angiotensin receptor blocker (ARB), It is used in the treatment of hypertension also effective in cardiovascular risk reduction.Telmisartan blocks the action of angiotensin II (Ang II), the primary effector molecule of the renin-angiotensin-aldosterone system (RAAS). It is the sixth of this class of 《sartans》 to be marketed after the lead compound Losartan. Its long lasting effect (24h half-life) could be the main difference with other angiotensin II antagonists. Unlike several other agents in this category, its activity does not depend upon transformation into an active metabolite, the 1-O-acylglucuronide being the principal metabolite found in humans. Telmisartan is a potent competitive antagonist of AT1 receptors that mediate most of the important effects of angiotensin II while lacking affinity for the AT2 subtypes or other receptors involved in cardiovascular regulation.

Chemical Properties

White or off white crystalline powder

Originator

Boehringer Ingelheim (Germany)

Uses

Telmisartan, an angiotensin II receptor antagonist, is an effective medication for the treatment of hypertension. It can be used alone or in combination with other antihypertensive drugs. Additionally, it is beneficial in the treatment of diabetic nephropathy in hypertensive individuals with type 2 diabetes mellitus. Telmisartan is also used to address congestive heart issues.

Definition

ChEBI: Telmisartan is a member of the class of benzimidazoles used widely in the treatment of hypertension. It has a role as an antihypertensive agent, an angiotensin receptor antagonist, an EC 3.4.15.1 (peptidyl-dipeptidase A) inhibitor, a xenobiotic and an environmental contaminant. It is a member of biphenyls, a member of benzimidazoles and a carboxybiphenyl.

Manufacturing Process

Telmisartan was synthesized through the reaction of methyl 3,4-diaminobenzoate dihydrochloride and butyric acid chloride in the presence of phosphorous oxychloride, with subsequent purification steps:
A solution of 23.9 g (100 mMol) of methyl 3,4-diaminobenzoate dihydrochloride and 11.7 g (110 mMol) of butyric acid chloride in 100 ml of phosphorus oxychloride is refluxed for 2 h. Then about 80 ml of phosphorus oxychloride are distilled off and the residue is mixed with about 150 ml of water. The oily crude product precipitated is extracted three times with 50 ml of ethyl acetate and after evaporation purified by column chromatography (600 g of silica gel; eluant:methylene chloride/methanol (30:1)). Yield of methyl-2-n-propyl-benzimidazole-5-carboxylate: 15.0 g of oil (69%).
A solution of 15.0 g (73 mmol) of methyl 2-n-propyl-benzimidazole-5- carboxylate and 8 g (200 mMol) of sodium hydroxide in 200 ml of water and 400 ml of ethanol is refluxed for 2 h. Then the alcohol is distilled off, the aqueous solution is acidified with dilute sulphuric acid (pH 4-5) and evaporated using a rotary evaporator. The product crystallising out is suction filtered, washed with 50 ml of acetone and 50 ml of diethylether and dried. Yield of 2-n-propyl-benzimidazole-5-carboxylic acid-hemisulphate: 9.1 g (61%), melting point: >220°C.
A solution of 6.7 g (25 mMol) of 2-n-propyl-benzimidazole-5-carboxylic acidhemisulphate and 4.9 g (25 mMol) of 2-methylaminoaniline dihydrochloride in 200 g of polyphosphoric acid is stirred for 5 h at 150°C, then poured onto 600 ml of water and made alkaline with concentrated ammonia whilst cooling with ice. The resulting solution is extracted three times with 200 ml of ethyl acetate, the crude product thus obtained is purified by column chromatography (300 g of silica gel; eluant:methylene chloride/methanol = 15:1). Yield of 2-n-propy1-5-(1-methylbenzimidazol-2-yl)-benzimidazole: 2.8 g of oil (39%).
A solution of 2.0 g (6.9 mMol) of 2-n-propyl-5-(1-methylbenzimidazol-2-yl)- benzimidazole and 0.91 g (7.5 mmol) of potassium tert-butoxide in 50 ml of dimethylsulfoxide is stirred for 90 min at room temperature, then 2.6 g (7.5 mMol) of tert-butyl 4'-bromomethyl-biphenyl-2-carboxylate are added and the mixture is stirred for a further 15 h at room temperature. The mixture is then poured onto 300 ml of water and extracted three times with 50 ml of ethyl acetate. The crude product obtained after evaporation of the organic phase is purified by column chromatography (300 g silica gel; eluant:methylene chloride/methanol = 30:1). In this way, 2.7 g (70%) of an isomer mixture are obtained (by NMR spectroscopy), contains about 1.18 g of tert-butyl-4'-[(2-npropyl- 5-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl)-methyl]biphenyl-2- carboxylate and about 1.52 g of tert-butyl 4'-[(2-n-propyl-6-(1- methylbenzimidazol-2-yl)-benzimidazol-1-yl)-methyl]biphenyl-2-carboxylate).
2.70 g of the isomer mixture obtained above are dissolved in 100 ml of methylene chloride, mixed with 40 ml of trifluoroacetic acid and stirred for 4 h at room temperature. The mixture is then evaporated to dryness in vacuo, the residue is dissolved in 100 ml of 2 N sodium hydroxide solution, the solution is washed with 50 ml of diethylether and the product mixture is precipitated by acidifying the aqueous phase with acetic acid. By column chromatography (400 g of silica gel, eluant:methylene chloride/methanol = 15:1) of the solid thus obtained 0.9 g (74%) of Telmisartan, melting point 217°-218°C.

brand name

Micardis (Boehringer Ingelheim).

Therapeutic Function

Antihypertensive

General Description

Telmisartan, 4'-[(1,4'-dimethyl-2'-propyl[2,6'-bi-1H-benzimidazol]-1'-yl)methyl]-[1,1'-biphenyl]-2-carboxylic acid (Micardis), does not appear to bear any structuralrelationship to this class, but there is actually a great dealof overlap in the chemical architecture with other agents. Thefirst, and most significant, difference is the replacement of theacidic tetrazole system with a simple carboxylic acid. Thisacid, like the tetrazole, plays a role in receptor binding. Thesecond difference is the lack of a carboxylic acid near the imidazolenitrogen that also contributes to receptor binding.As with irbesartan, however, there is not a need for this groupto be acidic but, rather, to be one that participates in receptorbinding. The second imidazole ring, much like a purine basein deoxyribonucleic acid (DNA), can hydrogen bond with theangiotensin II receptor.

Biochem/physiol Actions

Telmisartan is a non-peptide AT1 angiotensin receptor antagonist.

Clinical Use

Angiotensin-II antagonist:
Hypertension
Prevention of cardiovascular events

Synthesis

Telmisartan can be prepared in eight steps starting with methyl 4-amino-3-methyl benzoate; the first and second cyclization into a benzimidazole ring occur at steps 4 and 6 respectively.
Synthesis of telmisartan

Drug interactions

Potentially hazardous interactions with other drugs
Anaesthetics: enhanced hypotensive effect.
Analgesics: antagonism of hypotensive effect and increased risk of renal impairment with NSAIDs; hyperkalaemia with ketorolac and other NSAIDs.
Antihypertensives: increased risk of hyperkalaemia, hypotension and renal impairment with ACE-Is and aliskiren.
Cardiac glycosides: concentration of digoxin increased.
Ciclosporin: increased risk of hyperkalaemia and nephrotoxicity.
Diuretics: enhanced hypotensive effect; hyperkalaemia with potassium-sparing diuretics.
ESAs: increased risk of hyperkalaemia; antagonism of hypotensive effect.
Lithium: reduced excretion (possibility of enhanced lithium toxicity).
Potassium salts: increased risk of hyperkalaemia.
Tacrolimus: increased risk of hyperkalaemia and nephrotoxicity.

Metabolism

Telmisartan is metabolised by conjugation to the glucuronide of the parent compound. No pharmacological activity has been shown for the conjugate.
Telmisartan is excreted almost entirely in the faeces via bile, mainly as unchanged drug.

Clinical claims and research

In several clinical studies, Telmisartan, at a once daily dosage, produced effective and sustained blood-pressure lowering effects with a low incidence of side effects (particularly treatment-related cough associated with ACE inhibitors in elderly patients).

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Synthesis of Telmisartan from EXECUTE STANDARD
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View Lastest Price from Telmisartan manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Telmisartan pictures 2024-03-28 Telmisartan
144701-48-4
US $100.00-92.00 / kilograms 10kilograms 99% 100tons Hebei Dangtong Import and export Co LTD
Telmisartan pictures 2024-03-26 Telmisartan
144701-48-4
US $0.00 / Kg/Bag 2Kg/Bag EP / USP 20 tons Sinoway Industrial co., ltd.
Telmisartan pictures 2024-03-16 Telmisartan
144701-48-4
US $0.00 / KG 100g 98%+ 100kg WUHAN CIRCLE POWDER TECHNOLOGY CO.,LTD
  • Telmisartan pictures
  • Telmisartan
    144701-48-4
  • US $100.00-92.00 / kilograms
  • 99%
  • Hebei Dangtong Import and export Co LTD
  • Telmisartan pictures
  • Telmisartan
    144701-48-4
  • US $0.00 / Kg/Bag
  • EP / USP
  • Sinoway Industrial co., ltd.
  • Telmisartan pictures
  • Telmisartan
    144701-48-4
  • US $0.00 / KG
  • 98%+
  • WUHAN CIRCLE POWDER TECHNOLOGY CO.,LTD

Telmisartan Spectrum

2-[4-[[4-methyl-6-(1-methyl-2-benzimidazolyl)-2-propyl-1-benzimidazolyl]methyl]phenyl]benzoic acid 2-[4-[[4-methyl-6-(1-methylbenzimidazol-2-yl)-2-propyl-benzimidazol-1-yl]methyl]phenyl]benzoic acid 2-[4-[[4-methyl-6-(1-methylbenzimidazol-2-yl)-2-propylbenzimidazol-1-yl]methyl]phenyl]benzoic acid 4'-[(1,7'-dimethyl-2'-propyl-1H,3'H-2,5'-bibenzimidazol-3'-yl)methyl]biphenyl-2-carboxylic acid Telmisartan Synonyms 4'[(1,4'-Dimethyl-2'-propyl[2,6'-bi-1H-benzimidazol]-1'-yl)methyl][1,1'-biphenyl]-2-carboxylic acid 4'-((1,7'-Dimethyl-2'-propyl-1H,3'H-[2,5'-bibenzo[d]imidazol]-3'-yl)methyl)-[1,1'-biphenyl]-2- 4'-[{1,4'-Dimethyl-2'-Propyl[2,6'-Bi-1H-Benzimiaszol]-1'yl}-Methyl}-1,1'-Biphenyl-2-Caroxylic Acid Dimethyl Ethyl Ester 4'-[{1,4'-Dimethyl-2'-Propyl[2,6'-Bi-1H-Benzimiaszol]-1'yl}-Methyl}-1,1'-Biphenyl-2-Caroxylic Acid 4''-(1,7''-DIMETHYL-2''-PROPYL-1H-[2,5'']BIBENZOIMIDAZOLYL-3''-YLMETHYL)-BIPHENYL-2-CARBOXYLIC ACID 4-chloromethyl-5-methyl-1,3-dioxol-2-tone 4'-(1,7'-Dimethyl-2'-propyl-1H- BIBR 277, 4μ[(1,4μ-Dimethyl-2μ-propyl[2,6μ-bi-1H-benzimidazol]-1μ-yl)methyl][1,1μ-biphenyl]-2-carboxylic acid 4'-[[4-Methyl-6-(1-methyl-2-benzimidazolyl)-2-propyl-1-benzimidazolyl]methyl]-2-biphenylcarboxylic acid 4'-[[1,4'-Dimethyl-2 Telmisartan (150 mg) TelMisartan (Micardis) BIBR 277SE TelMisartan API 4'-[[4-Methyl-6-(1-methyl-1H-benzimidazol-2-yl)-2-propyl-1H-benzimidazol-1-yl]methyl]biphenyl-2-carboxylic Acid 4'-((1,7'-DiMethyl-2'-propyl-1H,3'H-[2,5'-bibenzo[d]iMidazol]-3'-yl)Methyl)-[1,1'-biphenyl]-2-carboxylic acid BIBR 277 4'[(1,4'-DIMETHYL-2'-PROPYL[2,6'-BI-1H-BENZIMIDAZOL]-1'-YL)METHYL][1,1'-BIPHENYL]-2-CARBOXYLIC ACID 4'-[(1,4'-DIMETHYL-2'-PROPYL[2,6'-BI-H-BENZIMIDAZOL]-1'-YL)METHYL][1,1'-BIPHENYL]-2-CARBOXYLIC ACID 3-methoxy-8-[(4-methoxy-3,5-dimethyl-pyridin-2-yl)methyl sulfinyl]-2,7,9-triazabicyclo[4.3.0]nona-2,4,8,10-tetraene [1,1'-Biphenyl]-2-carboxylic acid, 4'-[(1,4'-dimethyl-2'-propyl[2,6'-bi-1H-benzimidazol]-1'-yl)methyl]- 4'-[[1,4'-Dimethyl-2'-propyl[2,6'-bi-1H-benzimidazol]-1'-yl]-methyl]-1,1'-biphenyl-2carboxylic acid,dimethylethyl ester Telmisartan99.5% TelmisartanC33H30N402 Micardis, Pritor, 4[(1,4Dimethyl-2propyl[2,6bi-H-benzimidazol]-1yl)methyl][1,1biphenyl]-2-carboxylic Acid, TIMETAZIDINE 4′-((2-n-Propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl)methyl)biphenyl-2-carbonsure TELMISARTAN PRITOR 4'-((1,7'-Dimethyl-2'-propyl-1H,3'H-[2,5'-bibenzo[d]imidazol]-3'-yl)methyl)-[1,1'-biphenyl]-2-car (1,1'-Biphenyl)-2-carboxylic acid, 4'-((1,4'-dimethyl-2'-propyl(2,6'-bi-1H-b Telmisartan for system suitability CRS Telmisartan for peak identification CRS Telmisartan CRS misartan Telmisartan USP/EP/BP Telmisartan (10mM in DMSO) Telmisartan-USP Telmisetron Telmisartan (BIBR 277) Telmisartan impurities1033 Telmisartan (61)-1 gram TelmisartanQ: What is Telmisartan Q: What is the CAS Number of Telmisartan Q: What is the storage condition of Telmisartan Q: What are the applications of Telmisartan Telmisartan for peak identification (Y0000649) Telmisartan for system suitability (Y0001003) Telmisartan (1643419)Q: What is Telmisartan (1643419) Q: What is the CAS Number of Telmisartan (1643419) Telmisartan (Y0000648) Telmisartan (1643419) Telmisattan timishatyan TIMISHATAN TU-199 MICARDIS Telmisarta