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Home > Encyclopedia > Dabigatran etexilate

Dabigatran etexilate

pharmaceutical raw materials
Dabigatran etexilate structure

Dabigatran etexilate 

structure
  • CAS No:

    211915-06-9

  • Formula:

    C34H41N7O5

  • Chemical Name:

    Dabigatran etexilate

  • Synonyms:

    β-Alanine,N-[[2-[[[4-[[[(hexyloxy)carbonyl]amino]iminomethyl]phenyl]amino]methyl]-1-methyl-1H-benzimidazol-5-yl]carbonyl]-N-2-pyridinyl-,ethyl ester;Dabigatran etexilate;BIBR 1048;Prazaxa;1428422-77-8

  • Categories:

    Active Pharmaceutical Ingredients  >  Blood System Drugs

Description

Dabigatran etexilate(BIBR-1048) is the orally active prodrug of dabigatran; Dabigatran is a reversible and selective, direct thrombin inhibitor (DTI) with Ki value of 4.5 nM.IC50 Value: 4.5 nM (Ki); 10 nM(Thrombin-induced platelet aggregation) [1]in vitro: Dabigatran selectively and reversibly inhibited human thrombin(Ki: 4.5 nM) as well as thrombin-induced platelet aggregation (IC(50): 10 nM), while showing no inhibitory effect on other platelet-stimulating agents.Thrombin generation in


Solid


Dabigatran etexilate is an oral prodrug that is hydrolyzed to the competitive and reversible direct thrombin inhibitor [dabigatran]. Dabigatran etexilate may be used to decrease the risk of venous thromboembolic events in patients in whom anticoagulation therapy is indicated. In contrast to warfarin, because its anticoagulant effects are predictable, lab monitoring is not necessary. Dabigatran etexilate was approved by the FDA in 2010.

Dabigatran etexilate Basic Attributes

627.74

627.73

1592732-453-0

2E18WX195X

2933990090

Characteristics

152

3.8

Solid

1.2±0.1 g/cm3

128-129 °C

827.9°C at 760 mmHg

454.5±37.1 °C

1.615

1.8mg/ml, partly soluble

1.49E-27mmHg at 25°C

Toxicity

No human studies involving pregnancy, labor and delivery, nursing, or pediatrics. Geriatric patients are at higher risk of adverse effects than younger patients but the risk to benefit ratio is generally still favourable for older patients. Patients with a creatinine clearance of 15-30mL/min should have their doses of dabigatran etexilate reduced, and no data is available for patients with a creatinine clearance below 15mL/min. In animal studies, dabigatran increases the rates of dead offspring and causes uterine and vaginal bleeding close to birth. Dabigatran may or may not be excreted in breast milk so the risk and benefit of stopping the drug or stopping breast feeding must be considered.

Dabigatran is approximately 35% protein plasma bound.

Drug Information

Dabigatran is indicated for the prevention of venous thromboembolic events in patients who have undergone elective hip or knee replacement surgery (based on RE-NOVATE, RE-MODEL, and RE-MOBILIZE trials). In 2010, it was approved in the US and Canada for prevention of stroke and systemic embolism in patients with atrial fibrillation (approval based on the RE-LY trial).|FDA Label

Dabigatran directly inhibits thrombin in a concentration-dependent, reversible, specific, and competitive manner which results in a prolongation of aPTT (partial thromboplastin time), ECT (Ecarin clotting time), and TT (thrombin time).

Oral dabigatran is 3-7% bioavailable, reaching a maximum concentration 1 hour after administration in fasted subjects. When taken with a meal that is high in fat, the time to maximum concentration increases to 2 hours, though this does not affect dosing. Dabigatran etexilate's bioavailability increases to 75% when taken without the capsule shell and so patients should not chew or crush the capsules.|7% of the dose is recovered in urine and 86% is recovered in the feces.|50-70L.

Dabigatran etexilate is metabolised by esterases, microsomal carboxylesterases, and uridine 5'-diphospho-glucuronosyltransferases(UGTs). Dabigatran etexilate undergoes hydrolysis to create the active dabigatran which is then glucuronidated by UGTs to 1-O, 2-O, 3-O, or 4-O-acylglucuronide.

12 to 17 hours.

Dabigatran is hydrolysed to the active dabigatran by an esterase which induces hydrolysis. Dabigatran and it's glucuronidated metabolites all share equal pharmacological activity. Dabigatran and its metabolites inhibit thrombin, a serine protease. This inhibition prevents the thrombin mediated conversion of fibrinogen to fibrin, an early step in the coagulation cascade. With reduced conversion of fibrinogen to fibrin, clotting time increases.

Dabigatran etexilate Use and Manufacturing

Methods of Manufacturing

General procedure: Compound 1 (2 g, 3.7 mmol) was dissolved in 60 mL of THF and 12 mL of water. Reference Example-2: Preparation of Dabigatran etexilate free base To a stirred suspension of p-TSA salt of l-methyl-2-[N-(4-amidinophenyl)-aminomethyl]- benzimidazol-5-yl-carboxylic acid-N-phenyl-N-(2-ethoxycarbonylethyl)-amide(20g) in acetonitrile (80 mL), at 27°C, was charged a solution of potassium carbonate (24.7 g) in DM water (50 mL).The reaction mass was stirred for 30 min, and then cooled to 12-15°C. n-Hexyl chloroformate (4.9g) was added and stirred for 30 min. The temperature of the reaction mass was raised 17°C and stirred for 30 min. Second lot of n-hexylchloroformate (1.49 g) was charged and the reaction mass stirred for another hour at 16-20°C, when analytical HPLC revealed completion of the reaction. DM water (50mL) was added and the reaction mass slurred for 15 min at 30°C. The precipitate was filtered, washed with water, dried under vacuum, at 50°C, to afford Dabigatran Etexilate as off-white solid material ( 16.4g, >96percent hplc pure).

Uses

BIBR-1048 (Dabigatran) is an anticoagulant from the class of the direct thrombin inhibitors. It is being studied for various clinical indications and in many cases it offers an alternative to warfarin as the preferred orally administered blood thinner sin

Computed Properties

Molecular Weight:627.7
XLogP3:5.3
Hydrogen Bond Donor Count:3
Hydrogen Bond Acceptor Count:9
Rotatable Bond Count:18
Exact Mass:627.31691743
Monoisotopic Mass:627.31691743
Topological Polar Surface Area:152
Heavy Atom Count:46
Complexity:991
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Drug Function and Efficacy

Dabigatran etexilate, as a small molecule prodrug, does not show any pharmacological activity. After oral administration, it can be rapidly absorbed and converted into dabigatran via esterase-catalyzed hydrolysis in plasma and liver. Dabigatran is a potent, competitive, reversible, direct thrombin inhibitor and is also the main active ingredient in plasma. Dabigatran can inhibit free thrombin, thrombin combined with fibrin and thrombin-induced platelet aggregation, thereby preventing thrombosis.

This ingredient has been used in drugs with the following functions (note: it does not mean that the ingredient itself has the following health functions)

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