WO2013010502A1 - 一种普拉格雷的酸加成盐及其制备方法和用途 - Google Patents

一种普拉格雷的酸加成盐及其制备方法和用途 Download PDF

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WO2013010502A1
WO2013010502A1 PCT/CN2012/078967 CN2012078967W WO2013010502A1 WO 2013010502 A1 WO2013010502 A1 WO 2013010502A1 CN 2012078967 W CN2012078967 W CN 2012078967W WO 2013010502 A1 WO2013010502 A1 WO 2013010502A1
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prasugrel
hydroxy
dihydroxybenzenesulfonate
substituted
acid
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PCT/CN2012/078967
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French (fr)
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邹永
陈洪
陈大峰
王勇
袁辛娅
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四川海思科制药有限公司
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00Sulfonic acids; Halides, esters, or anhydrides thereof
    • C07C309/01Sulfonic acids
    • C07C309/28Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
    • C07C309/41Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing singly-bound oxygen atoms bound to the carbon skeleton
    • C07C309/42Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing singly-bound oxygen atoms bound to the carbon skeleton having the sulfo groups bound to carbon atoms of non-condensed six-membered aromatic rings
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/33Heterocyclic compounds
    • A61K31/395Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/4353Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems
    • A61K31/4365Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems the heterocyclic ring system having sulfur as a ring hetero atom, e.g. ticlopidine
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00Drugs for disorders of the blood or the extracellular fluid
    • A61P7/02Antithrombotic agents; Anticoagulants; Platelet aggregation inhibitors
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00Drugs for disorders of the cardiovascular system
    • A61P9/10Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D495/00Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms
    • C07D495/02Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
    • C07D495/04Ortho-condensed systems

Definitions

  • the invention relates to the field of medicine, in particular to 2-acetoxy- 5- ( ⁇ -cyclopropylcarbonyl-2-fluorobenzyl)-4,5,6,7-tetrahydrothiophene having platelet aggregation inhibition effect.
  • Hydroxy-substituted benzenesulfonate of [3,2-c]pyridine ie, prasugrel, Prasugrel
  • a pharmaceutical composition containing the compound as an active ingredient and their use in the preparation for thrombosis or embolism
  • cardiovascular and cerebrovascular diseases In recent years, the incidence of cardiovascular and cerebrovascular diseases has been on the rise, which has seriously endangered human health. Among them, related diseases caused by thrombosis or embolism are the primary factors leading to disability and death. The prevention and treatment of thrombosis and its complications has become an important issue facing the world medical community. Inhibition of platelet aggregation can effectively improve and prevent cardiovascular and cerebrovascular diseases caused by thrombosis. Therefore, research on antiplatelet drugs has become a hot spot for cardiovascular disease treatment.
  • a representative platelet inhibitor antithrombotic drug is clopidogrel hydrogen sulfate (trade name: Plavix), which is a platelet adenosine diphosphate P2Y12 receptor blocker (antagonism:) agent. It is used in the treatment of atherosclerotic disease, acute coronary syndrome, prevention of in-stent restenosis and thrombosis after coronary stent implantation and is one of the leading pharmaceutical products in the world.
  • a new generation of platelet P2Y12 receptor blocker prasugrel [Prasugrel, formula (1)], is a marketed thienopyridine, its chemical name is 2-acetoxy-5-( ⁇ -cyclopropane Carbocarbonyl-2-fluorobenzyl:) -4,5,6,7-tetrahydrothieno[3,2-c]pyridine.
  • Clinical studies have shown that the anti-platelet accumulation of prasugrel is markedly and rapidly compared with clopidogrel, the incidence of ischemic events in the prasugrel group is reduced, and there are fewer blood clots in patients after medication, heart attack, stroke The combined risk of death from heart disease is 20% lower.
  • prasugrel has good tolerance and bioavailability, and its toxicity is also low. Both domestic and foreign studies have shown that prasugrel has more potential for antiplatelet than clopidogrel, which is more than the approved dose. Clopidogrel is more effective in inhibiting ADP-induced platelet aggregation, has a faster onset of action, and has fewer individual differences between patients.
  • prasugrel As a potent adenosine diphosphate (ADP) receptor antagonist, prasugrel is less soluble in water. Under the influence and inhibition of pharmaceutical excipients, it is not conducive to the preparation of pharmaceutical preparations and not in pharmaceutical preparations. Easy to dissolve.
  • the pharmaceutically acceptable salt of this compound is prepared to improve its water solubility, stability and oral absorption activity without altering the pharmacological properties of prasugrel.
  • Patents WO0204461 and US6693115 disclose prasugrel sulfates, nitrates, phosphates, trifluoroacetates, methanesulfonates, p-toluenesulfonates, hydrochlorides and maleates, and hydrochlorides and horses are found.
  • the acid salt has improved stability and efficacy compared with prasugrel free base.
  • Patent WO2009066326 and WO2009062044 disclose the preparation of prasugrel and its series of acid addition salts.
  • Patent CN101177430A discloses a process for the preparation of prasugrel sulfuric acid, hydrobromic acid, hydroiodic acid, nitric acid, oxalic acid, trifluoroacetic acid, methanesulfonate, p-toluenesulfonate and the like.
  • Patent CN101456864B discloses a process for the preparation of prasugrel sulfate.
  • Patent CN101255169B discloses a process for preparing methanesulfonic acid, salicylic acid salicylic acid, hydrobromic acid, and hydroiodide.
  • the object of the present invention is to improve the stability, safety and related pharmaceutical properties of prasugrel, and to provide a novel prasugrel acid addition salt, i.e., a hydroxy-substituted benzenesulfonate of prasugrel.
  • Another object of the present invention is to provide a process for the preparation of the above hydroxy substituted benzenesulfonate of prasugrel.
  • Still another object of the present invention is to provide a pharmaceutical composition comprising the above-mentioned hydroxy substituted benzenesulfonate of prasugrel as an active ingredient.
  • a further object of the present invention is to provide a use of the above-mentioned hydroxy-substituted benzenesulfonate of prasugrel in the preparation of a medicament for the prophylaxis or treatment of a disease caused by thrombosis or embolism.
  • a further object of the present invention is to provide a novel crystalline form of the above prasugrel 2,5-dihydroxybenzenesulfonic acid, i.e., Form A.
  • the present invention provides a structure of the following formula (2):
  • R 2 , R 3 , and R 5 may be H or OH, and at least one is OH; or an isomer, hydrate or solvate thereof.
  • R 4 may be H or OH, and at least one is OH, R 2 and R 5 are H; or R 2 and R 3 may be H or OH, and at least one is OH, and R 5 are H.
  • the hydroxy substituted besylate salt of the above prasugrel is preferably 2-acetoxy-5-( ⁇ -cyclopropylcarbonyl-2-fluorobenzyl)-4,5,6,7-tetrahydrothieno[3 , 2-c]pyridine 2,5-dihydroxybenzenesulfonate;
  • the preparation method of the hydroxy-substituted benzenesulfonate of prasugrel according to the present invention comprises the following steps:
  • the reaction process of the present invention is as follows:
  • the reaction temperature is 0 to 100 ° C, preferably 30 to 60 ° C, and most preferably 30 ° C.
  • the organic solvent may be chloroform, dichloromethane, ethyl acetate, acetone, tetrahydrofuran, methyltetrahydrofuran, dioxane, acetonitrile as long as it can dissolve the reactants without hindering the reaction.
  • One or more of propionitrile, propanol, n-butanol, tert-butanol, ethanol, and methanol are preferably acetone.
  • the molar ratio of prasugrel to the organic solvent is 1:25-100.
  • the molar ratio of prasugrel to hydroxy-substituted benzenesulfonic acid is 1:1-2, preferably
  • the hydroxy-substituted benzenesulfonic acid is preferably 2,5-dihydroxybenzenesulfonic acid, 2,4-dihydroxybenzenesulfonic acid, 2,3-dihydroxybenzenesulfonic acid, or p-hydroxybenzenesulfonate. acid.
  • the above reaction solution is usually concentrated to 1/2 volume, allowed to stand; and cooled to 0-25 ° C, preferably 20 ° C.
  • the single crystal X-ray diffraction pattern of the crystal of prasugrel 2,5-dihydroxybenzenesulfonate is shown in Fig. 1, Fig. 2, Fig. 3; the reflection angle of the powder X-diffraction pattern is about 8.27. Characteristic absorption peaks at 9.41, 16.12, 18.63, 19.75, 24.36° with an allowable error of ⁇ 0.2.
  • the reflection angle 2 ⁇ of the powder X-ray diffraction pattern is 7.88 ⁇ 0.2, 8.27 ⁇ 0.2, 9.41 ⁇ 0.2, 14.12 ⁇ 0.2, 16.12 ⁇ 0.2, 18.64 ⁇ 0.2, 19.43 ⁇ 0.2, 19.75 ⁇ 0.2, 23.72 ⁇ 0.2
  • stereoisomers of the R configuration and the S configuration exist, and compounds each independently or in any ratio are included in the present invention.
  • Such stereoisomers may be synthesized from optically active compounds or may be synthesized as 2-acetyl-5-( ⁇ -cyclopropylcarbonyl-2-fluorobenzyl)-4,5,6.
  • the acid addition salt of 7-tetrahydrothieno[3,2-c]pyridine is subjected to resolution of stereoisomers by a conventional resolution method as needed.
  • the compound of the formula (2) of the present invention can be administered orally or parenterally.
  • the chemical can be mixed with a conventional pharmaceutically acceptable carrier by conventional formulation techniques, such as granules, capsules, tablets, powders or lozenges.
  • a conventional pharmaceutically acceptable carrier refers to a conventional pharmaceutical carrier such as an excipient, a disintegrant, a binder, a lubricant, an antioxidant, Coating agents, colorants, fragrances, surfactants.
  • the pharmaceutical composition of the present invention contains a therapeutically effective amount of the above compound of the formula (2) as an active ingredient, that is, 2-acetyl-5-( ⁇ -cyclopropylcarbonyl-2-fluorobenzyl)-4,5,6 a hydroxy-substituted benzenesulfonate of 7-tetrahydrothieno[3,2-c]pyridine, or the 2-acetoxy-5-( ⁇ -cyclopropylcarbonyl-2-fluorobenzyl)- 4,5,6,7-tetrahydrothieno[3,2-c]pyridine 2,5-dihydroxybenzenesulfonate crystals, and one or more pharmaceutically acceptable carriers.
  • the various dosage forms of the pharmaceutical compositions can be prepared according to conventional methods of manufacture in the art of pharmacy, e.
  • excipients eg, lactose, white sugar, glucose, mannitol, sorbitol, etc.
  • corn starch potato starch, alpha-starch, dextrin, etc.
  • synthetic aluminum silicate, calcium silicate, aluminum magnesium silicate Phosphate such as calcium phosphate
  • carbonate such as calcium carbonate
  • inorganic excipient such as sulfate such as calcium
  • a compound of the formula (2) of the present invention, the 2-acetoxy-5-( ⁇ -cyclopropylcarbonyl-2-fluorobenzyl:)-4,5,6,7-tetrahydrothieno[3 , 2-c]pyridine 2,5-dihydroxybenzenesulfonate crystal, or the above pharmaceutical composition can be used for preparing a drug having an inhibitory effect on platelet aggregation, preventing or treating a disease caused by thrombosis or embolism.
  • the application amount of the compound of the formula (2) of the present invention can be determined according to the route of administration, the age, weight of the patient, and the treatment. Different doses are used for changes in the disease and severity of the treatment.
  • hydroxy substituted benzenesulfonate of prasugrel namely 2-acetyl-5-( ⁇ -cyclopropylcarbonyl-2-fluorobenzyl)-4,5,6,
  • the hydroxy-substituted benzenesulfonate of 7-tetrahydrothieno[3,2-c]pyridine can also be referred to as "hydroxy-substituted prasugrel benzenesulfonate”.
  • prasugrel 2,5-dihydroxybenzenesulfonate can also be referred to as "prasugrel 2,5-dihydroxybenzenesulfonate”.
  • the hydroxyl group of 2-acetyl-5-( ⁇ -cyclopropylcarbonyl-2-fluorobenzyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine of the present invention is placed in the air or by recrystallization, and will absorb water to form a hydrate. Therefore, an acid addition salt containing water is also included in the present invention.
  • the hydroxyl group of 2-acetyl-5-( ⁇ -cyclopropylcarbonyl-2-fluorobenzyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine of the present invention When the substituted besylate is crystallized in an organic solvent or placed in an organic solvent, a solvate will be formed, and accordingly the corresponding solvate is also included in the present invention.
  • the hydroxy-substituted benzenesulfonate of prasugrel provided by the invention has good stability and safety.
  • the preparation method of the invention is simple and easy, and a single crystal of high purity can be obtained, and the product quality is good and the yield is high.
  • the single crystal X-ray diffraction pattern of the obtained prasugrel 2,5-dihydroxybenzenesulfonate is shown in Fig. 1, Fig. 2, Fig. 3 and the attached table 1, and the powder diffraction pattern is shown in Fig. 4.
  • the present invention provides a crystalline form VIII suitable for pharmaceutical use.
  • Figure 3 Single crystal diffraction pattern of prasugrel 2,5-dihydroxybenzenesulfonate. Crystallographic pattern of intracellular molecules.
  • Unit cell parameters (a/A, b/A, c/A) 9.35867(19), 11.3040(3), 12.6201(3) Unit cell parameters ( ⁇ /°, ⁇ /°, ⁇ /°) 104.712(2) , 94.3901(19), 99.6161(19) Volume / A 3 1263.22(5)
  • Example 1 Synthesis of prasugrel 2,5-dihydroxybenzenesulfonate
  • the single crystal X-ray diffraction pattern of prasugrel 2,5-dihydroxybenzenesulfonate is shown in Figure 1, Figure 2, Figure 3 and Table 1.
  • the powder diffraction pattern is shown in Figure 4.
  • Prasugrel ( 17.2g, 0.046mol) and 2,5-dihydroxybenzenesulfonic acid (10.5g, 0.055mol) were added to a reaction flask containing acetone (300ml), and the temperature was controlled at 10 ° C. It dissolved to give a clear solution.
  • the reaction solution was concentrated to 1/2 volume, allowed to stand, and cooled to 10 ° C to precipitate crystals as 2,5-dihydroxybenzenesulfonate of prasugrel, weight: 21.0 g, yield: 81.1%.
  • Example 3 Synthesis of prasugrel 2,5-dihydroxybenzenesulfonate
  • Prasugrel ( 17.2 g, 0.046 mol) and 2,5-dihydroxybenzenesulfonic acid (10.5 g, 0.055 mol) were respectively added to a reaction flask containing acetone (100 ml), heated to 56 ° C, and stirred. Dissolved to give a clear solution. The reaction solution was concentrated to 1/2 volume, allowed to stand, and cooled to 25 ° C to precipitate crystals as 2,5-dihydroxybenzenesulfonate of prasugrel, weight: 21.8 g, yield: 83.9%.
  • Prasugrel (10. 3g, 0.028mol), 2,5-dihydroxybenzenesulfonic acid (10.5g, 0.055mol) were added to a reaction flask containing acetone (100ml), and the temperature was controlled at 30 ° C. It dissolved to give a clear solution.
  • the reaction solution was concentrated to 1/2 volume, allowed to stand, and cooled to 0 ° C to precipitate crystals as 2,5-dihydroxybenzenesulfonate of prasugrel, weight: 11.9 g, yield: 75.4%.
  • Prasugrel ( 17.2 g, 0.046 mol) and 2,5-dihydroxybenzenesulfonic acid (10.5 g, 0.055 mol) were added to a reaction flask containing tetrahydrofuran (170 ml), and the temperature was controlled at 30 ° C. It dissolved to give a clear solution.
  • the reaction solution was concentrated to 1/2 volume, allowed to stand, and cooled to 10 ° C to precipitate crystals as 2,5-dihydroxybenzenesulfonate of prasugrel, weight: 20.7 g, yield: 79.8%.
  • Prasugrel ( 17.2 g, 0.046 mol) and 2,5-dihydroxybenzenesulfonic acid (10.5 g, 0.055 mol) were respectively added to a reaction flask containing ethyl acetate (300 ml), and the temperature was controlled at 30 ° C. Stirring was allowed to dissolve to obtain a clear solution. The reaction solution was concentrated to 1/2 volume, allowed to stand, and cooled to 25 ° C to precipitate crystals as 2,5-dihydroxybenzenesulfonate of prasugrel, weight: 21.0 g, yield: 81.0%.
  • Prasugrel (17.2 g, 0.046 mol) and p-hydroxybenzenesulfonic acid (9.6 g, 0.055 mol) were added.
  • the temperature was controlled at 30 ° C, and the mixture was stirred to dissolve to obtain a clear solution.
  • the reaction solution was concentrated to 1/2 volume, allowed to stand, cooled to 0 ° C, and crystallized to give prasugrel p-hydroxybenzenesulfonate, prasugrel p-hydroxybenzenesulfonate, weight: 22.7 g, yield: 90.2%.
  • Prasugrel (17.2 g, 0.046 mol) and p-hydroxybenzenesulfonic acid (9.6 g, 0.055 mol) were respectively added to a reaction flask containing acetone (200 ml), and the temperature was controlled at 10 ° C, and the mixture was stirred to dissolve. Clarify the solution. The reaction solution was concentrated to 1/2 volume, allowed to stand, and cooled to 10 ° C to precipitate crystals as p-hydroxybenzenesulfonate of prasugrel, weight: 21.4 g, yield: 85.2%.
  • Prasugrel (17.2 g, 0.046 mol) and p-hydroxybenzenesulfonic acid (9.6 g, 0.055 mol) were respectively added to a reaction flask containing acetone (100 ml), heated to 56 ° C, stirred to dissolve, and clarified. Solution. The reaction solution was concentrated to 1/2 volume, allowed to stand, and cooled to 25 ° C to precipitate crystals as p-hydroxybenzenesulfonate of prasugrel, weight: 22.2 g, yield: 88.2%.
  • Prasugrel (10.5 g, 0.028 mol) and p-hydroxybenzenesulfonic acid (9.6 g, 0.055 mol) were respectively added to a reaction flask containing acetone (100 ml), and the temperature was controlled at 30 ° C, and the mixture was stirred to dissolve. Clarify the solution. The reaction solution was concentrated to 1/2 volume, allowed to stand, cooled to 0 ° C, and crystals were precipitated as p-hydroxybenzene of prasugrel. Sulfonate, weight: 12.3 g, yield: 80.2%.
  • Prasugrel (17.2 g, 0.046 mol) and p-hydroxybenzenesulfonic acid (9.6 g, 0.055 mol) were respectively added to a reaction flask containing tetrahydrofuran (100 ml), and the temperature was controlled at 30 ° C, and the mixture was stirred to dissolve. Clarify the solution. The reaction solution was concentrated to 1/2 volume, allowed to stand, and cooled to 10 ° C to precipitate crystals as p-hydroxybenzenesulfonate of prasugrel, weight: 21.0 g, yield: 83.2%.
  • Prasugrel (17.2 g, 0.046 mol) and p-hydroxybenzenesulfonic acid (9.6 g, 0.055 mol) were respectively added to a reaction flask containing tetrahydrofuran (150 ml), and the temperature was controlled at 30 ° C, and the mixture was stirred to dissolve. Clarify the solution. The reaction solution was concentrated to 1/2 volume, allowed to stand, and cooled to 25 ° C to precipitate crystals as p-hydroxybenzenesulfonate of prasugrel, weight: 21.7 g, yield: 86.2%.
  • Test Example 1 Comparative study on the stability of prasugrel free base, prasugrel hydrochloride and prasugrel 2,5-dihydroxybenzenesulfonate
  • prasugrel 2,5-dihydroxybenzenesulfonate is superior to free base in high temperature, high humidity and strong light conditions.
  • the stability of prasugrel 2,5-dihydroxybenzenesulfonate is significantly higher than that of the hydrochloride under high humidity conditions, and the stability is slightly higher than that of the hydrochloride under high temperature and strong light conditions. Therefore, prasugrel 2,5-dihydroxybenzenesulfonate has better stability.
  • Test Example 1 Compound against ADP-induced rat platelet aggregation inhibition test
  • SPF grade SD rats weighing 200 ⁇ 240 g, male and female. Provided by the Institute of Experimental Animals, Sichuan Academy of Medical Sciences.
  • Test sample prasugrel 2,5-dihydroxybenzenesulfonate (crystal form A), molecular weight 563.6, purity: 99.8 %; domesticated for 5 days after purchase, healthy animals were stratified by sex and body weight They were randomly divided into 13 groups, 12 animals in each group, half male and half female. They are:
  • Blank control group sodium chloride injection was orally administered at 10 ml/kg
  • the rats were administered intragastrically for 5 days according to the corresponding group, once a day, 2 hours after the last administration, the rats were anesthetized with chloral hydrate by intraperitoneal injection, fixed, and the abdominal aorta was taken for blood, 3.8% ⁇ Sodium and blood were anticoagulated in a volume ratio of 1:9.
  • the platelet-rich blood plasma (PRP) was centrifuged at 900 rpm for 15 min; the platelet-poor plasma (PPP) was taken by centrifugation at 3500 rpm for 15 min.
  • the PRP of the same animal was adjusted to a platelet count of about 3.0 X 10 11 /L by PPP of the same animal.
  • the platelets obtained were separated and the experimental determination was completed within 3 h.
  • Platelet aggregation inhibition rate (%) [ 1- (platelet aggregation rate in the drug-administered group / platelet aggregation rate in the control group)] l 00%
  • the data analysis uses spssl5.0 statistical software. If the data conforms to the normal distribution, one-way analysis of variance is used. If the data does not conform to the normal distribution, a nonparametric rank sum test is used.
  • Prasugrel hydrochloride-dose group 2 3 10 4.80 ⁇ 2.25' 91.27
  • Prasugrel hydrochloride-dose group 3 1 10 6.10 ⁇ 2.03 88.90
  • Prasugrel hydrochloride - dose group 4 0.3 10 17.50 ⁇ 4.74" 68.18
  • the blank control group 10 ml/kg 10 55.00 ⁇ 8.54" -- compared with the blank control group: " ⁇ 0.05 ; " P ⁇ 0M ;
  • Prasugrel 2,5-dihydroxybenzenesulfonate was administered by continuous intragastric administration for 5 days, and it inhibited platelet aggregation induced by ADP in the dose range of 0.042 13.7 mg/kg. The intensity is dose dependent.
  • ED 50 0.2191 mg/kg, 95% confidence interval (0.198 0.2402 mg/kg); 2,5-dihydroxybenzene was obtained by S-type Imax model fitting calculation.
  • 2,5-dihydroxybenzenesulfonic acid prasugrel ED 5 .
  • the confidence interval covers the entire prasugrel hydrochloride ED 5 .
  • the corresponding range indicating the two drugs ED 5 . (Confidence interval) There was no difference, that is, there was no difference in the inhibition of platelet aggregation by the two drugs.
  • Beagle dogs were domesticated for 5 days after purchase and were quarantined. Healthy animals were randomly divided into 3 groups according to body weight, 5 rats in each group, which were blank control group, prasugrel free base group and 2,5-dihydroxybenzenesulfonic acid prasugrel group.
  • the rats were anesthetized with 30 mg/kg sodium pentobarbital solution, 5.4 ml of blood was collected from the jugular vein, and 3.8% sodium citrate and blood were anticoagulated in a volume ratio of 1:9.
  • the platelet-rich blood (PRP) was taken at 900 rpm for 15 min; the platelet poor blood (PPP) was obtained by centrifugation at 3500 rpm for 15 min.
  • the PRP of the same animal was used to adjust the PRP of the animal to a platelet count of about 3.0 X 10 U /L.
  • the platelets obtained were separated and the experimental determination was completed within 3 h.
  • the dog was orally administered the compound (capsule). After 2 hours and 4 hours of administration, blood was collected, and platelet aggregation was measured by the above method, and the aggregation inhibition rate of the drug was calculated according to the formula.
  • Platelet aggregation inhibition rate (%) [ 1- (platelet aggregation rate in the drug-administered group / platelet aggregation rate in the control group)] l 00%
  • prasugrel free base means 2-acetoxy-5-( ⁇ -cyclopropylcarbonyl-2-fluorobenzyl)-4,5,6,7-tetrahydrothieno[3,2- c] pyridine
  • prasugrel 2,5-dihydroxybenzenesulfonate means 2-acetoxy- 5- ( ⁇ -cyclopropylcarbonyl-2-fluorobenzyl)-4,5 of Example 1, 6,7-tetrahydrothieno[3,2-c]pyridine 2,5-dihydroxybenzenesulfonic acid
  • prasugrel 2,5-dihydroxybenzenesulfonate and prasugrel free base have an inhibitory effect on ADP-induced platelet aggregation when the dog is orally administered an equimolar dose of 0.3 mg/kg.
  • the inhibition of platelet aggregation activity of prasugrel 2,5-dihydroxybenzenesulfonate was significantly better than that of prasugrel free base (p ⁇ 0.05), suggesting better absorption after oral administration, thus exerting strong drug efficacy. effect.
  • Test Example 3 Inhibition of prasugrel free base and prasug 2,5-dihydroxybenzenesulfonate on cervical-venous bypass thrombosis in experimental rats
  • the rats were domesticated for 5 days after purchase, and 200 healthy animals were randomly divided into four groups according to body weight, 50 in each group, control group (saline), prasugrel free base group, 2,5-dihydroxybenzene. Sulforasulfate group.
  • Animals were given a single oral or intragastric administration of each group of drugs at a dose of 3 mg/kg (based on prasugrel free base). 60 minutes after intragastric administration, after intraperitoneal injection of urethane, the left external jugular vein and the right common carotid artery were separated. A cannula consisting of three polyethylene tubes was used, and a 5 cm long weighing wire was placed between them. A fixed end of the wire is inserted into the right common carotid artery, and the blood flow is opened immediately after the operation is completed. After 15 minutes, the blood flow was interrupted, and the silk thread was quickly taken out for weighing. The total weight minus the weight of the thread is the wet weight of the thrombus. The thrombosis inhibition rate was calculated according to the following formula.
  • Thrombosis inhibition rate (control group thrombus weight 1 test group thrombus weight) / control group thrombus weight X 100% After the thrombus wet weight was measured, the rats were sacrificed, dissected, and the gastric mucosa congestion, edema, and bleeding were observed with a magnifying glass. Rats with mucosal congestion, edema, and hemorrhage were recorded in the corresponding experimental group for gastric mucosal bleeding.
  • the first day load dose is 9 mg / kg; # compared with the control group, P ⁇ 0.01.
  • Table 4 when rats were given a single oral dose of 3 mg/kg, prasugrel 2,5-dihydroxybenzenesulfonate and prasugrel free base inhibited thrombus formation, 2,5-two The thrombus weight of prasugrel hydroxybenzenesulfonate group was significantly lower than that of the control group, and there was a significant difference between the control group and the control group. PO.01; the inhibition rate of thrombus was also slightly higher than that of the prasugrel group (no statistical difference).
  • mice After the rats were purchased, they were domesticated for 5 days, and 120 healthy animals were randomly divided into 12 groups according to body weight, 10 in each group, half male and half female. There were 6 groups of prasugrel hydrochloride 1.40 ⁇ 1.90g/kg, and prasugrel 2,5-dihydroxybenzenesulfonate 2.75 ⁇ 3.30g/kg. Animals in each group were fasted for 16 hours, given a single intragastric administration of the drug at a dose of 25 ml/kg.
  • test sample The sample was weighed according to the required concentration, dissolved in 3% DMSO + 5% absolute ethanol, and then made up to volume with 1% CMC-Na solution.
  • Agents it group 5 10 3.25 1 dose it group 6 10 3.30 2 Agent" who 7 10 1.90 7 agents” who 8 10 1.80 5 agents" who 9 10 1.70 3
  • Agent 1: group 10 10 1.60 3 dose 1: group 11 10 1.50 1 dose, 1: group 12 10 1.40 0 can be seen from Table 5, different doses of prasugrel 2,5-dihydroxybenzenesulfonate and prasugrel hydrochloride After a single intragastric administration, no significant adverse reactions were observed in the low-dose groups. When the dose was close to the MTD, the animals developed clinical symptoms such as less movement, piloerection, salivation, prone, lateral lying, and some animals after administration. After death within 8 ⁇ 12h, no obvious lesions of various organs were observed after the gross anatomy of the dead and dying animals.

Abstract

本发明公开了一种普拉格雷的酸加成盐、其制备方法和用途。所述制备方法为:分别向有机溶剂中加入普拉格雷、羟基取代苯磺酸,搅拌,溶解,得到澄清溶液。在一定温度下反应,浓缩,静置,析出结晶,过滤即可得到普拉格雷的酸加成盐。与普拉格雷相比,本发明提供的普拉格雷的酸加成盐,具有良好稳定性;该制备方法简便易行,可获得高纯度的单晶和和适合药用的晶型,产品质量好,收率高。

Description

一种普拉格雷的酸加成盐及其制备方法和用途
技术领域
本发明涉及医药领域, 具体涉及一种具有血小板凝集抑制作用的 2-乙酰氧 基 -5-( α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶 (即普拉格雷, Prasugrel)的羟基取代苯磺酸盐, 其制备方法和以该化合物为活性成分的药物组 合物, 以及它们在制备用于血栓或栓塞引起的疾病的预防或治疗药物中的用途。 背景技术
近年来, 心脑血管疾病发病率呈上升趋势, 已严重危害人类健康, 其中, 血栓或栓塞导致的相关疾病是当前导致残疾和死亡的首要因素。 血栓及其并发 症的防治已成为世界医学界面临的重要课题。 抑制血小板聚集可有效改善和预 防血栓导致的心脑血管疾病, 因此, 抗血小板药物的研究已成为心血管疾病治 疗的热点。
目前, 具有代表性的血小板抑制剂类抗血栓药物为硫酸氢氯吡格雷 (商品 名: 波立维, Plavix) , 是一种血小板二磷酸腺苷 P2Y12 受体阻断 (拮抗:)剂, 临 床上应用于治疗动脉粥状硬化疾病、 急性冠脉综合症、 预防冠脉内支架植入术 后支架内再狭窄和血栓性并 是全球销售份额领先的药品之一。
Figure imgf000003_0001
新一代血小板 P2Y12受体阻断剂普拉格雷 [Prasugrel,式 (1)],是一种已上市 的噻吩并吡啶类药物, 其化学名为 2-乙酰氧基 -5-( α -环丙基羰基 -2-氟苄 基:) -4,5,6,7-四氢噻吩并 [3 ,2-c]吡啶。 临床研究证明, 与氯吡格雷相比, 普拉格雷 抗血小板聚积的作用明显而且迅速, 普拉格雷组缺血事件的发生率降低, 患者 用药后血液中的血栓更少, 心脏病发作、 中风、 因心脏病死亡的综合风险要低 20 %。 同时, 普拉格雷有良好的耐受性及生物利用度, 毒性也较低。 国内外的 研究均表明, 普拉格雷比氯吡格雷在抗血小板方面更有潜力, 其比批准剂量的 氯吡格雷在抑制 ADP诱导血小板凝聚上的效果更强、 起效更快、 患者间的个体 差异更小。
普拉格雷作为一种强效的腺苷二磷酸 (ADP ) 受体拮抗剂, 在水中溶解度 较小, 在药用辅料的影响和阻抑下, 不利于药物制剂的制备和在药物制剂中不 易于溶出。 在不改变普拉格雷的药理性质前提下, 需制备此化合物药学上可接 受的盐, 以改善其水溶性、 稳定性和口服吸收活性。
对此, 前人在这方面也做了一定的工作。 专利 WO0204461 及 US6693115 公开了普拉格雷硫酸盐、 硝酸盐、 磷酸盐、 三氟乙酸盐、 甲磺酸盐、 对甲苯磺 酸盐、 盐酸盐和马来酸盐, 发现盐酸盐和马来酸盐在稳定性和药效方面较普拉 格雷游离碱均有所提高。
专利 WO2009066326及 WO2009062044公开了普拉格雷及其一系列酸加成 盐的制备方法。
专利 CN101177430A公开了普拉格雷的硫酸、 氢溴酸、 氢碘酸、 硝酸、 草 酸、 三氟乙酸、 甲磺酸盐、 对甲苯磺酸盐等的制备方法。
专利 CN101456864B公开了普拉格雷硫酸盐的制备方法。
专利 CN101255169B公开了甲磺酸、 乙酸水杨酸、 氢溴酸、 氢碘酸盐的制 备方法。
除发现普拉格雷的盐酸盐和马来酸盐外, 上述前人的专利大多涉及普拉格 雷盐的制备方法, 对各种盐的性能如溶解性、 稳定性、 生物活性等均未给出详 细的评测, 也没有发现明显的优势。 鉴于具有良好药学性质的酸加成盐对药物 的临床应用相当重要, 因此继续寻找新类型的药学上可接受的普拉格雷酸加成 盐十分必要。 发明内容
本发明的目的在于改善普拉格雷的稳定性、 安全性及相关药学性质, 提供 一种新的普拉格雷酸加成盐, 即普拉格雷的羟基取代苯磺酸盐。
本发明的另一目的在于提供一种上述普拉格雷的羟基取代苯磺酸盐的制备 方法。
本发明的又一目的在于提供一种以上述普拉格雷的羟基取代苯磺酸盐为活 性成分的药物组合物。 本发明的进一步目的在于提供一种上述普拉格雷的羟基取代苯磺酸盐在制 备用于血栓或栓塞引起的疾病的预防或治疗药物中的用途。
本发明的进一步目的在于提供一种上述普拉格雷 2,5-二羟基苯磺酸的新的 晶型, 即晶型 A。
本发明的目的通过下述方案实现:
本发明提供一种普 下述式 (2 ) 结构:
Figure imgf000005_0001
其中, 、 R2、 R3、 和 R5可为 H或 OH, 且至少有一个为 OH; 或者其异构 体、 水合物或溶剂合物。
优选地, 式 (2 ) 中 、 和 R4可为 H或 OH, 且至少有一个为 OH, R2 和 R5为 H; 或者 R2和 R3可为 H或 OH, 且至少有一个为 OH, 和 R5为 H。
上述普拉格雷的羟基取代苯磺酸盐优选为 2-乙酰氧基 -5-( α -环丙基羰基 -2- 氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶 2,5-二羟基苯磺酸盐;
2-乙酰氧基 -5-( α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶对羟 基苯磺酸盐;
2-乙酰氧基 -5-( α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶 2,3- 二羟基苯磺酸盐; 或者
2-乙酰氧基 -5-( α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶 2,4- 二羟基苯磺酸盐。
本发明所述普拉格雷的羟基取代苯磺酸盐的制备方法, 包括下述步骤:
1 ) 分别向有机溶剂中加入普拉格雷、 羟基取代苯磺酸, 搅拌, 溶解, 在一 定温度下反应, 得到澄清溶液;
2 ) 浓缩上述反应液, 静置, 冷却, 抽滤, 得到普拉格雷的羟基取代苯磺酸
; t卜
本发明的反应过程如下所示:
Figure imgf000006_0001
步骤 1) 中, 所述的反应温度为 0-100 °C, 优选为 30-60°C, 最优选为 30°C。 步骤 1) 中, 所述的有机溶剂只要能溶解反应物且不阻碍反应进行即可, 可 以为氯仿、 二氯甲垸、 乙酸乙酯、 丙酮、 四氢呋喃、 甲基四氢呋喃、 二氧六环、 乙腈、 丙腈、 丙醇、 正丁醇、 叔丁醇、 乙醇、 甲醇中的一种或一种以上, 优选 为丙酮。 所述的普拉格雷与有机溶剂的摩尔比为 1:25-100。
步骤 1) 中, 所述的普拉格雷与羟基取代苯磺酸的摩尔比为 1:1-2, 优选为
1:1.2。
步骤 1) 中, 所述的羟基取代苯磺酸优选为 2,5-二羟基苯磺酸、 2,4-二羟基 苯磺酸、 2,3-二羟基苯磺酸、 或者对羟基苯磺酸。
步骤 2) 中, 通常浓缩上述反应液至 1/2体积, 静置; 冷却至 0-25°C, 优选 20°C。
所述普拉格雷 2,5-二羟基苯磺酸盐的晶体, 其单晶 X-衍射图见图 1、 图 2、 图 3; 其粉末 X-衍射图的反射角 2Θ在约为 8.27、 9.41、 16.12、 18.63、 19.75、 24.36°处有特征吸收峰, 允许误差为 ±0.2。更具体地, 其粉末 X-衍射图的反射角 2Θ在 7.88±0.2、 8.27±0.2、 9.41±0.2、 14.12±0.2、 16.12±0.2、 18.64±0.2、 19.43±0.2、 19.75±0.2、 23.72±0.2、 24.16±0.2、 24.36±0.2、 25.54±0.2、 25.82 ±0.2°处有特征吸收峰, 其粉末 X-衍射图见图 4。
鉴于普拉格雷的酸加成盐的分子内具有不对称碳原子, 存在 R构型和 S构 型的立体异构体, 它们各自独立或以任意比例混合的化合物都包含在本发明中。 这样的立体异构体可以用具有光学活性的化合物为原料合成, 或者可以将合成 的 2-乙酰基 -5-( α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶的酸加成 盐根据需要用常规的拆分方法进行立体异构体的拆分。
本发明的式 (2) 化合物可经口或不经口给药。 经口服给药时, 可采用常规 的制剂技术, 将该化学物与常规的药学上可接受的载体混合制成常规的固体制 剂, 如颗粒剂、 胶囊剂、 片剂、 散剂或糖桨剂等; 非经口服给药时, 可采用常 规的制剂技术将其制成注射液、 输液剂或栓剂等。 所述药学上可接受的载体是 指药学领域常规的药物载体, 如赋形剂、 崩解剂、 粘合剂、 润滑剂、 抗氧化剂、 包衣剂、 着色剂、 芳香剂、 表面活性剂。
本发明的药物组合物含有治疗有效量的作为活性成分的上述式(2 )化合物, 即 2-乙酰基 -5-( α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶的羟基取 代苯磺酸盐,或者所述的 2-乙酰氧基 -5-( α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻 吩并 [3,2-c]吡啶 2,5-二羟基苯磺酸盐晶体, 以及含有一种或多种药学上可接受的 载体。 该药物组合物的各种剂型可以按照药学领域的常规生产方法制备, 例如 使活性成分与一种或多种载体混合, 然后将其制成所需的剂型。
这些制剂可以通过已知方法用下述添加剂进行制造: 赋形剂 (如: 乳糖、 白糖、 葡萄糖、 甘露醇、 山梨醇等糖衍生物; 玉米淀粉、 马铃薯淀粉、 α -淀粉、 糊精等淀粉衍生物; 结晶纤维素衍生物; 阿拉伯树胶; 右旋糖酐; 普鲁兰等有 机赋形剂; 以及轻质硅酸酐、 合成硅酸铝、 硅酸钙、 硅酸铝镁等硅酸盐衍生物; 磷酸氢钙等磷酸盐; 碳酸钙等碳酸盐; 硫酸钙等硫酸盐等的无机赋形剂)、 润滑 剂 (如: 硬脂酸、 硬脂酸钙、 硬脂酸镁等硬脂酸金属盐; 乙二醇; 反丁烯二酸; 苯甲酸钠; DL-亮氨酸; 十二垸基硫酸钠、 十二垸基硫酸镁等十二垸基硫酸盐; 硅酸酐、 硅酸水合物等硅酸类; 以及上述淀粉衍生物)、 粘合剂 (如: 羟丙基纤 维素、 羟丙甲基纤维素、 聚乙烯吡咯垸酮、 聚乙二醇以及与上述赋开剂同样的 化合物)、 崩解剂 (如: 低取代羟丙基纤维素衍生物; 羧甲基淀粉、 羧甲基淀粉 钠、交联聚乙烯吡咯垸酮等经化学改性的淀粉或纤维素类;上述的淀粉衍生物)、 乳化剂 (如: 膨润土、 V 字胶等胶态粘土; 氢氧化镁、 氢氧化铝等金属氢氧化 物; 十二垸基硫酸钠、 硬脂酸钙等阴离子表面活性剂; 苯扎氯铵等阳离子表面 活性剂; 以及聚氧乙烯垸基醚、 聚氧乙烯脱水山梨糖脂肪酸酯、 蔗糖脂肪酸等 非离子表面活性剂), 稳定剂 (如: 羟苯甲酸甲酯、 对羟基苯甲酸丙酯等对羟基 苯甲酸酯类; 三氯叔丁醇、 苯甲醇、 苯乙醇等醇类; 苯扎氯铵、 苯酚、 甲酚等 酚类; 硫汞撒; 脱氢乙酸; 以及山梨酸)、 矫味剂 (如: 通常使用的甜味料、 酸 味料、 香料)、 稀释剂等。
本发明的式 (2 ) 化合物、 所述的 2-乙酰氧基 -5-( α -环丙基羰基 -2-氟苄 基:) -4,5,6,7-四氢噻吩并 [3,2-c]吡啶 2,5-二羟基苯磺酸盐晶体, 或者上述药物组合 物可用于制备具有抑制血小板凝集作用的药物, 预防或治疗血栓或栓塞引起的 疾病。
本发明式 (2 ) 化合物的施用量可根据用药途径、 患者的年龄、 体重、 所治 疗的疾病和严重程度等变化而采取不同的用量。
需要指出的是, 本发明所述的普拉格雷的羟基取代苯磺酸盐, 即 2-乙酰基 -5-( α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶的羟基取代苯磺酸 盐, 也可采用 "羟基取代苯磺酸普拉格雷" 的称谓。 具体地, "普拉格雷 2,5-二 羟基苯磺酸盐"也可采用 "2,5-二羟基苯磺酸普拉格雷" 的称谓。
有时,本发明所述 2-乙酰基 -5-( α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶的羟基取代苯磺酸盐放置在空气中或通过再结晶,将会吸收水分形成 水合物, 因此含有水分的酸加成盐也包含在本发明中。
有时,本发明所述 2-乙酰基 -5-( α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶的羟基取代苯磺酸盐在有机溶剂中结晶或在有机溶剂中放置过程中, 将会形成溶剂合物, 因此相应的溶剂合物也包含在本发明中。
本发明具有如下优点和效果:
本发明提供的普拉格雷的羟基取代苯磺酸盐, 具有良好的稳定性和安全性。 本发明制备方法简便易行, 可获得高纯度的单晶, 产品质量好, 收率高。 所得 2,5-二羟基苯磺酸普拉格雷的单晶 X-衍射图谱见图 1、图 2、图 3和附表 1, 粉末衍射图见图 4。
对于普拉格雷 2,5-二羟基苯磺酸盐, 本发明提供了适合药用的晶型八。
动物实验发现, 本发明提供的普拉格雷 2,5-二羟基苯磺酸盐, 即 2-乙酰氧 基 -5-( α 环丙基羰基—2—氟苄基 )—4,5,6,7-四氢噻吩并 [3,2-c]吡啶 2,5-二羟基苯磺酸 盐具有比已上市的盐酸普拉格雷更高的最大耐受剂量 (MTD:)。 附图说明
图 1、普拉格雷 2,5-二羟基苯磺酸盐的单晶衍射图谱 [Oxford CCD X射线单 晶衍射仪 (Xcalibur E), μ(Μο Ko =0.271mm— ^——分子结构图
图 2、普拉格雷 2,5-二羟基苯磺酸盐的单晶衍射图谱 含氢键的分子结构 图
图 3、普拉格雷 2,5-二羟基苯磺酸盐的单晶衍射图谱 晶胞内分子堆积图 图 4、 普拉格雷 2,5-二羟基苯磺酸盐晶型 A的粉末衍射图谱 (X' Pert PRO MPD X射线衍射仪; Cu/K-alphal辐射源, λ=1.54056A )
图 5、 普拉格雷 2,5-二羟基苯磺酸盐晶型 Α的粉末衍射图表 (续 1 ) 图 6、 普拉格雷 2,5-二羟基苯磺酸盐晶型 A的粉末衍射图表 (续 2)
附表 1: 2,5-二羟基苯磺酸普拉格雷的晶体数据和结构参数 实验式 C26H26FN08S2
分子量 563.60
温度 /κ 145.0
晶系 三斜晶系 (triclinic)
空间群 P-l
晶胞参数 (a/A, b/A, c/A) 9.35867(19), 11.3040(3), 12.6201(3) 晶胞参数 (α/°, β/°, γ/°) 104.712(2), 94.3901(19), 99.6161(19) 体积 /A3 1263.22(5)
单位晶胞中的分子数 Z 2
计算密度 /mg mm"3 1.482
吸收系数 /mm— 1 0.271
F因子 588
晶体尺寸 /mm3 0.25 0.25 0.20
数据收集的 Θ角范围 5.9 to 52.74°
限制指标 -11 <h< ll,-14<k< 14, -15<1< 15 收集到的衍射点 10803
独立衍射点 5171[R(int) = 0.0340]
数据 /限制数 /参数 5171/0/349
F2拟合优度 1.049
最终 R因子 [Ι〉2σ(Ι)] Rl =0.0542, wR2 = 0.1013
最终 R因子 [all data] Rl = 0.0834, w 2 = 0.1129
最大和最小偏差 e A- 3 0.306/-0.394 具体实施方式
下面结合实施例对本发明做进一步详细的描述, 但本发明的实施方式不限 于此。 实施例 1: 普拉格雷 2,5-二羟基苯磺酸盐的合成
分别将普拉格雷 ( 17.2g, 0.046mol) 、 2,5-二羟基苯磺酸 ( 10.5g, 0.055mol) 加入装有丙酮(170ml) 的反应瓶中, 控温在 30°C, 搅拌使其溶解, 得到澄清溶 液。 浓缩反应液至 1/2体积, 静置, 冷却至 0°C, 析出单晶, 为普拉格雷的 2,5- 二羟基苯磺酸盐, 即 2,5-二羟基苯磺酸普拉格雷, 重量: 22.2g, 收率: 85.6%。 该产物所对应的晶型命名为晶型 A。
以下为普拉格雷 2,5-二羟基苯磺酸盐的表征数据:
m.p. 175.3-176.5°C。
IR(KBr)v: 3303 (O-H), 3185, 3021 (C=C-H), 2929 (C-H), 1751 (0-C=0), 1700 (C=0), 1209, 1076 (S03"NH+), 1193 (C-F).
ESI-MS (positive): m/z=374, [M+H]+; m/z=396, [M+Na]+.
ESI-MS (negtive): m/z=189, [M-H]".
¾ NMR (DMSO-d6, δ /ppm): 0.898-0.955 (m, 2H, CH2), 1.046-1.105 (m, 2H, CH2), 1.923 (s, 1H, CH), 2.287 (s, 3H, CH3), 3.030-4.292 (m, 6H, CH2), 6.087 (s, 1H, CH), 6.552-6.627 (m, 3H, Ar-H), 6.870-6.877 (d, 1H, S-C=CH), 7.401-7.527 (m, 3H, Ar-H), 7.656-7.671 (m, 1H, Ar-H).
普拉格雷 2,5-二羟基苯磺酸盐的单晶 X-衍射图谱见图 1、 图 2、 图 3和附表 1, 粉末衍射图谱见图 4。
以上数据证实所得产物为普拉格雷 2,5-二羟基苯磺酸盐。 实施例 2: 普拉格雷 2,5-二羟基苯磺酸盐的合成
分别将普拉格雷 ( 17.2g, 0.046mol) 、 2,5-二羟基苯磺酸 ( 10.5g, 0.055mol) 加入装有丙酮(300ml) 的反应瓶中, 控温在 10°C, 搅拌使其溶解, 得到澄清溶 液。 浓缩反应液至 1/2体积, 静置, 冷却至 10°C, 析出结晶, 为普拉格雷的 2,5- 二羟基苯磺酸盐, 重量: 21.0g, 收率: 81.1%。
产物的表征结果同实施例 1。 实施例 3: 普拉格雷 2,5-二羟基苯磺酸盐的合成
分别将普拉格雷 ( 17.2g, 0.046mol) 、 2,5-二羟基苯磺酸 ( 10.5g, 0.055mol) 加入装有丙酮(100ml) 的反应瓶中, 加热至 56°C, 搅拌使其溶解, 得到澄清溶 液。 浓缩反应液至 1/2体积, 静置, 冷却至 25 °C, 析出结晶, 为普拉格雷的 2,5- 二羟基苯磺酸盐, 重量: 21.8g, 收率: 83.9%。
产物的表征结果同实施例 1。
实施例 4: 普拉格雷 2,5-二羟基苯磺酸盐的合成
分别将普拉格雷 ( 10.3g, 0.028mol) 、 2,5-二羟基苯磺酸 ( 10.5g, 0.055mol) 加入装有丙酮(100ml) 的反应瓶中, 控温在 30°C, 搅拌使其溶解, 得到澄清溶 液。 浓缩反应液至 1/2体积, 静置, 冷却至 0°C, 析出结晶, 为普拉格雷的 2,5- 二羟基苯磺酸盐, 重量: 11.9g, 收率: 75.4%。
产物的表征结果同实施例 1。
实施例 5: 普拉格雷 2,5-二羟基苯磺酸盐的合成
分别将普拉格雷 ( 17.2g, 0.046mol) 、 2,5-二羟基苯磺酸 ( 10.5g, 0.055mol) 加入装有四氢呋喃 (170ml) 的反应瓶中, 控温在 30°C, 搅拌使其溶解, 得到澄 清溶液。 浓缩反应液至 1/2体积, 静置, 冷却至 10°C, 析出结晶, 为普拉格雷 的 2,5-二羟基苯磺酸盐, 重量: 20.7g, 收率: 79.8%。
产物的表征结果同实施例 1。
实施例 6: 普拉格雷 2,5-二羟基苯磺酸盐的合成
分别将普拉格雷 ( 17.2g, 0.046mol) 、 2,5-二羟基苯磺酸 ( 10.5g, 0.055mol) 加入装有乙酸乙酯(300ml) 的反应瓶中, 控温在 30°C, 搅拌使其溶解, 得到澄 清溶液。 浓缩反应液至 1/2体积, 静置, 冷却至 25°C, 析出结晶, 为普拉格雷 的 2,5-二羟基苯磺酸盐, 重量: 21.0g, 收率: 81.0%。
产物的表征结果同实施例 1。
实施例 7: 普拉格雷对羟基苯磺酸盐的合成
分别将普拉格雷 (17.2g, 0.046mol) 、 对羟基苯磺酸 (9.6g, 0.055mol) 加入 装有丙酮 (170ml) 的反应瓶中, 控温在 30°C, 搅拌使其溶解, 得到澄清溶液。 浓缩反应液至 1/2体积, 静置, 冷却至 0°C, 析出结晶, 为普拉格雷对羟基苯磺 酸盐, 即对羟基苯磺酸普拉格雷, 重量: 22.7g, 收率: 90.2%。 m.p. 175-176°C。
ESI-MS (positive): m/z=374, [M+H]+; m/z=396, [M+Na]+.
ESI-MS (negtive): m/z=173, [M-H]".
¾ NMR (D20, δ /ppm): 0.9353-1.0125(m, 2H, CH2), 1.1008-1.1915 (m, 2H, CH2), 1.9024 (s, IH, CH), 2.2826 (s, 3H, CH3), 3.0794 (s, 2H, CH2), 3.5165 (s, 2H, CH2), 4.0251-4.0620 (d, IH, CH), 4.1837-4.2208 (d, IH, CH), 6.0070 (s, IH, CH), 6.5138 (s, IH, S-C=CH), 6.7730-6.7938 (d, 2H, Ar-H), 7.4148-7.5320 (m, 5H, Ar-H) 7.6896-7.7053(d, IH, Ar-H).
以上数据证实所得产物为普拉格雷对羟基苯磺酸盐。 实施例 8: 普拉格雷对羟基苯磺酸盐的合成
分别将普拉格雷 (17.2g, 0.046mol) 、 对羟基苯磺酸 (9.6g, 0.055mol) 加入 装有丙酮 (200ml) 的反应瓶中, 控温在 10°C, 搅拌使其溶解, 得到澄清溶液。 浓缩反应液至 1/2体积, 静置, 冷却至 10°C, 析出结晶, 为普拉格雷的对羟基 苯磺酸盐, 重量: 21.4g, 收率: 85.2%。
产物的表征结果同实施例 7。
实施例 9: 普拉格雷对羟基苯磺酸盐的合成
分别将普拉格雷 (17.2g, 0.046mol) 、 对羟基苯磺酸 (9.6g, 0.055mol) 加入 装有丙酮 (100ml) 的反应瓶中, 加热至 56°C, 搅拌使其溶解, 得到澄清溶液。 浓缩反应液至 1/2体积, 静置, 冷却至 25°C, 析出结晶, 为普拉格雷的对羟基 苯磺酸盐, 重量: 22.2g, 收率: 88.2%。
产物的表征结果同实施例 7。
实施例 10: 普拉格雷对羟基苯磺酸盐的合成
分别将普拉格雷 (10.5g, 0.028mol) 、 对羟基苯磺酸 (9.6g, 0.055mol) 加入 装有丙酮 (100ml) 的反应瓶中, 控温在 30°C, 搅拌使其溶解, 得到澄清溶液。 浓缩反应液至 1/2体积, 静置, 冷却至 0°C, 析出结晶, 为普拉格雷的对羟基苯 磺酸盐, 重量: 12.3g, 收率: 80.2%。
产物的表征结果同实施例 7。 实施例 11 : 普拉格雷对羟基苯磺酸盐的合成
分别将普拉格雷 (17.2g, 0.046mol) 、 对羟基苯磺酸 (9.6g, 0.055mol) 加入 装有四氢呋喃 (100ml) 的反应瓶中, 控温在 30°C, 搅拌使其溶解, 得到澄清溶 液。 浓缩反应液至 1/2体积, 静置, 冷却至 10°C, 析出结晶, 为普拉格雷的对 羟基苯磺酸盐, 重量: 21.0g, 收率: 83.2%。
产物的表征结果同实施例 7。 实施例 12: 普拉格雷对羟基苯磺酸盐的合成
分别将普拉格雷 (17.2g, 0.046mol) 、 对羟基苯磺酸 (9.6g, 0.055mol) 加入 装有四氢呋喃 (150ml) 的反应瓶中, 控温在 30°C, 搅拌使其溶解, 得到澄清溶 液。 浓缩反应液至 1/2体积, 静置, 冷却至 25°C, 析出结晶, 为普拉格雷的对 羟基苯磺酸盐, 重量: 21.7g, 收率: 86.2%。
产物的表征结果同实施例 7。 测试例 1 :普拉格雷游离碱、普拉格雷盐酸盐与普拉格雷 2,5-二羟基苯磺酸 盐的稳定性比较研究
取普拉格雷游离碱、盐酸盐与 2,5-二羟基苯磺酸盐分别在高温、 高湿、 强光 条件下进行加速破坏试验, 10天后进行液相检测, 结果如下:
表 1.普拉格雷游离碱、 普拉格雷盐酸盐及普拉格雷 2,5-二羟基 苯磺酸盐稳定性研究
考察项目
有关物质(%)
含量 考察时间 考察条件
总杂质 最大单个杂质
游离碱 0.37 0.11 100.00 盐酸盐 0.42 0.13 100.00
0天
2,5-二羟基苯
0.14 0.05 100.00 磺酸盐 游离碱 0.34 0.09 97.10 盐酸盐 0.57 0.15 99.56 高温 (60°C)
2,5-二羟基苯
0.15 0.05 99.82 磺酸盐 游离碱 0.32 0.10 89.92 盐酸盐 0.74 0.28 94.27 高湿 (RH90 %)
10天
2,5-二羟基苯
0.16 0.06 97.66 磺酸盐 游离碱 0.42 0.14 94.28 强光 (4500士 盐酸盐 0.45 0.14 97.95
5001x)
2,5-二羟基苯
0.14 0.03 98.18 磺酸盐
注: 将 0天含量设定为 100%。
由表 1可见,普拉格雷 2,5-二羟基苯磺酸盐在高温, 高湿与强光条件下稳定 性都优于游离碱。普拉格雷 2,5-二羟基苯磺酸盐在高湿条件下稳定性明显高于盐 酸盐, 在高温与强光条件下稳定性略高于盐酸盐。 因此, 普拉格雷 2,5-二羟基苯 磺酸盐具有更好的稳定性。 试验例 1 : 化合物对 ADP诱导的大鼠血小板聚集抑制试验
SPF级 SD大鼠, 体重 200〜240 g、 雌雄各半。 由四川省医学科学院实验动 物研究所提供。
对照品: 盐酸普拉格雷, 分子量 409.9, 纯度: 99.3 %;
供试品:普拉格雷 2,5-二羟基苯磺酸盐(晶型 A),分子量 563.6,纯度: 99.8 %; 大鼠购进后驯化饲养 5天, 取健康动物按性别与体重分层随机分为 13组, 每组动物 12只, 雌雄各半。 分别为:
空白对照组 (按 10ml/kg口服给予氯化钠注射液);
盐酸普拉格雷 0.03、 0.1、 0.3、 1、 3、 10 mg/kg共 6个剂量组;
2,5-二羟基苯磺酸普拉格雷 0.042、 0.14、 0.42、 1.4、 4.2、 13.7 mg/kg 共 6 个剂量组。
动物分组后,按照对应组别连续灌胃给药 5日,每日 1次,末次给药 2 h后, 大鼠腹腔注射水合氯醛麻醉, 固定, 腹主动脉取血, 将 3.8%枸橼酸钠与血液按 照 1:9体积比抗凝。 900 rpm离心 15 min取富血小板血桨 (PRP); 3500 rpm离 心 15 min取贫血小板血桨 (PPP)。 用同一动物的 PPP调节该动物的 PRP至血 小板数为 3.0 X 1011 /L左右。 分离获得的血小板需在 3 h内完成实验测定。
取 PPP 200 μΐ进行仪器调零, 再取同一动物富血小板血桨 200 μΐ, 37 V温 育 5 min后, 加入诱导剂 ADP溶液 20 μΐ, (终浓度为 18.18 mol/L), 进样测定 血小板聚集率, 按照公式计算不同组别药物的聚集抑制率。
血小板聚集抑制率(%) = [ 1- (给药组血小板聚集率 /对照组血小板聚集率) ] l 00%
数据分析采用 spssl5.0统计软件, 如果数据符合正态分布, 采用单因素方差 分析, 如果数据不符合正态分布, 采用非参数秩和检验。
大鼠灌胃给予盐酸普拉格雷及 2,5-二羟基苯磺酸普拉格雷 5天后, 对 ADP 诱导血小板聚集的影响见表 2
表 2.大鼠口服给药后的血小板聚集抑制作用 ( ± s )
组别 动物 血小板聚集率(%) 聚集抑制率
(mg/kg) (n ) (5min ) ( % ) 盐酸普拉格雷-剂量组 1 10 10 4.20±1.87' 92.36
盐酸普拉格雷-剂量组 2 3 10 4.80±2.25' 91.27
盐酸普拉格雷-剂量组 3 1 10 6.10±2.03 88.90
盐酸普拉格雷-剂量组 4 0.3 10 17.50±4.74" 68.18
盐酸普拉格雷-剂量组 5 0.1 10 33.80±4.76" 38.55
盐酸普拉格雷-剂量组 6 0.03 10 40.00±4.88 27.27
2,5-二羟基苯磺酸普拉
13.7 10 3.30±1.95 94.00
格雷-剂量组 1
2,5-二羟基苯磺酸普拉
4.2 10 3.40±2.01" 93.81
格雷-剂量组 2
2,5-二羟基苯磺酸普拉
1.4 10 4.50±1.58' 91.81
格雷-剂量组 3 2,5-•二羟基苯磺酸普拉
0.42 10 18.40±10.52" 66.55
格雷-剂量组 4
2,5- •二羟基苯磺酸普拉
0.14 10 32.20.±7.76 41.45
格雷-剂量组 5
2,5- •二羟基苯磺酸普拉
0.042 10 39.60±11.64 " 28.00
格雷-剂量组 6
空白对照组 10 ml/kg 10 55.00±8.54" -- 与空白对照组比较: " <0.05 ; " P<0M ;
( 1 ) 2,5-二羟基苯磺酸普拉格雷连续灌胃给药 5天, 在 0.042 13.7 mg/kg 剂量范围内, 对 ADP诱导引起的大鼠血小板聚集均具有明显的抑制作用, 作用 强度呈剂量相关性。
(2 ) 盐酸普拉格雷连续灌胃给药 5天, 在 0.03 1 mg/kg剂量范围内, 对 ADP诱导引起的大鼠血小板聚集均具有明显的抑制作用, 作用强度呈剂量相关 性。
(3 ) 2,5-二羟基苯磺酸普拉格雷与盐酸普拉格雷, 在同等摩尔浓度下比较, 各剂量组的血小板聚集率无显著差异 (Ρ〉0.05 )。
(4)通过 S型 Imax模型拟合计算得到盐酸普拉格雷抑制大鼠血小板聚集的 ED50 = 0.2191 mg/kg, 95%置信区间为 (0.198 0.2402 mg/kg); 2,5-二羟基苯磺酸 普拉格雷抑制大鼠血小板聚集的 ED5。 = 0.3225 mg/kg (摩尔浓度相当于盐酸普 拉格雷 0.2354 mg/kg), 95%置信区间为(0.1547 0.4902 11¾/]¾)。 2,5-二羟基苯磺 酸普拉格雷 ED5。置信区间全覆盖盐酸普拉格雷 ED5。相应范围, 说明 2种药物 ED5。 (置信区间) 无差异, 即 2种药物对血小板聚集的抑制作用无差异。
综上, 2,5-二羟基苯磺酸普拉格雷与盐酸普拉格雷连续灌胃给予大鼠 5天, 对 ADP诱导的大鼠血小板聚集均具有显著抑制作用, 表明两个样品都有抗血小 板聚集作用。 同等摩尔浓度下比较, 两种化合物对血小板聚集的抑制作用无统 计学差异, 且 ED5。相当, 表明二者药效作用基本一致。 试验例 2: 化合物对 ADP诱导的犬血小板聚集抑制试验
雄性 Beagle犬 15只, 体重 8 12 kg, 由四川省医学科学院实验动物研究所 提供。
Beagle犬购进后驯化饲养 5天, 并进行动物检疫。 取健康动物按体重随机 分为 3组, 每组 5只, 分别为空白对照组、 普拉格雷游离碱组、 2,5-二羟基苯磺 酸普拉格雷组。
犬喂食标准饲料 2.5h和 4.5h后, 采用戊巴比妥钠溶液 30mg/kg静注麻醉, 颈静脉采血 5.4ml, 将 3.8 %枸橼酸钠与血液按照 1:9体积比抗凝。 900 rpm离心 15 min取富血小板血奖 (PRP); 3500 rpm离心 15 min取贫血小板血奖 (PPP)。 用同一动物的 PPP调节该动物的 PRP至血小板数为 3.0 X 10U /L左右。分离获得 的血小板需在 3 h内完成实验测定。
取 PPP 200 μΐ进行仪器调零, 再取同一动物富血小板血桨 200 μΐ, 37 °〇温 育 5 min后, 加入诱导剂 ADP溶液 20 μΐ, (终浓度为 18.18 mol/L), 进样测定 血小板聚集率。
第二天, 喂食 30分钟后, 狗单次口服试验化合物(胶囊)。 给药 2h及 4h后 采血, 用上述方法测定血小板凝集, 按照公式计算药物的聚集抑制率。
血小板聚集抑制率(%) = [ 1- (给药组血小板聚集率 /对照组血小板聚集率) ] l 00%
Beagle犬口服给药后的血小板聚集抑制作用结果见表 3。
表中"普拉格雷游离碱"表示 2-乙酰氧基 -5-(α-环丙基羰基 -2-氟苄基 )-4,5,6,7- 四氢噻吩并 [3,2-c]吡啶, "2,5-二羟基苯磺酸普拉格雷"表示实施例 1的 2-乙酰氧 基 -5-(α-环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶 2,5-二羟基苯磺酸
; t卜 表 3. Beagle犬口服给药后的血小板聚集抑制作用( x士 s) 试验化合物 给药量(mg/kg) n 凝集抑制率(%)
2小时 4小时 普拉格雷游离碱 0.3 5 24.8 ± 8.9 29.7 ± 11.3
2,5-二羟基苯磺酸
0.3* 5 48.1 ± 14.5# 49.7 ± 15.3# 普拉格雷(晶型 A)
*按普拉格雷游离碱计, #与普拉格雷游离碱组相比 p<0.05。 由表 3可见, 当犬单次口服给予等摩尔剂量 0.3mg/kg时, 2,5-二羟基苯磺酸 普拉格雷及普拉格雷游离碱对于 ADP诱导的血小板聚集均具有抑制作用。 经统计分析, 2,5-二羟基苯磺酸普拉格雷的抑制血小板聚集活性明显优于普 拉格雷游离碱 (p<0.05 ), 提示口服给药后吸收更好, 从而发挥较强药效作用。 试验例 3: 普拉格雷游离碱及 2,5-二羟基苯磺酸普拉格雷对实验大鼠颈动 -静脉 旁路血栓形成的抑制作用
雄性 SPF级 SD大鼠, 体重 300〜350 g。 由四川省医学科学院实验动物研 究所提供。
大鼠购进后驯化饲养 5天, 取健康动物 200只, 按体重随机分为四组, 每 组 50只, 对照组 (生理盐水)、 普拉格雷游离碱组、 2,5-二羟基苯磺酸普拉格雷 组。
动物分别单次口服灌胃给予各组药物, 给药剂量均为 3mg/kg, (按普拉格雷 游离碱计)。 灌胃给药后 60min, 用乌拉坦腹腔注射麻醉后, 分离左颈外静脉和 右颈总动脉, 取三段聚乙烯管组成的套管, 其中间一段一根 5cm长的称重丝线, 将丝线固定的一端套管插入右颈总动脉, 手术完成后立即开放血流。 15min后中 断血流, 迅速取出丝线称重。 总重量减去丝线重量即为血栓湿重。 按以下公式 计算血栓形成抑制率。
血栓形成抑制率= (对照组血栓重一试验组血栓重) /对照组血栓重 X 100% 测定完血栓湿重后处死大鼠, 解剖, 借助放大镜观察胃粘膜充血、 水肿、 出血情况, 有胃粘膜充血、 水肿、 出血现象的大鼠, 记录相应的实验组胃粘膜 出血例。
普拉格雷游离碱及 2,5-二羟基苯磺酸普拉格雷对大鼠颈动-静脉旁路血栓形 成的抑制作用结果见表 4。
表 4._普拉格雷游离碱及 2,5-二羟基苯磺酸普拉格雷对大鼠颈动-静脉旁路血栓形成的抑制作 用 ( ± s, n=50)
m\ ^J * 血栓湿重 ( mg ) 抑制率 (%) 例
(mg/kg) M 率 对照组 NS 38.55 ± 3.27 ― ― ― 普拉格雷游离碱组 3 20.78 ±2.82 # 46.1 6 12%
2 5-二 基苯麵普拉議 3 19.93 + 2. 76 ^ 48.3 5 10%* 曰曰 A
注: *首日负荷剂量为 9 mg/kg; #与对照组比较, P<0.01。 由表 4可见, 当大鼠单次口服给予等摩尔剂量 3mg/kg时, 2,5-二羟基苯磺酸 普拉格雷及普拉格雷游离碱均能抑制血栓形成,其中 2,5-二羟基苯磺酸普拉格雷 组血栓重量明显低于对照组, 和对照组比较均有非常显著差异 PO.01 ; 其对血 栓的抑制率亦稍高于普拉格雷组 (无统计学差异)。 另外, 在增强药效作用的同 时, 2,5-二羟基苯磺酸普拉格雷组的出血率与普拉格雷游离碱组相比略有降低, 说明其在抑制大鼠动 -静脉旁路血栓形成的同时并不会显著增加出血风险。 试验例 4:大鼠口服给予盐酸普拉格雷及 2,5-二羟基苯磺酸普拉格雷急性毒性试 验
SPF级 SD大鼠, 雌雄各半, 体重 140〜160g, 由四川省医学科学院实验动 物研究所提供。
大鼠购进后驯化饲养 5天, 取健康动物 120只, 按体重随机分为 12组, 每 组 10只, 雌雄各半。分别为盐酸普拉格雷 1.40〜1.90g/kg共 6组、 2,5-二羟基苯 磺酸普拉格雷 2.75〜3.30g/kg共 6组。 各组动物禁食不禁水 16h, 单次灌胃给予 药物, 给药体积为 25ml/kg。
受试品配制: 按所需要的浓度称取样品, 用 3%DMSO+5%无水乙醇溶解后 再使用 1%CMC-Na溶液定容后备用。
剂量设计及依据: 为评价盐酸普拉格雷与普拉格雷衍生盐的安全性差异, 按照等摩尔的剂量分别给予大鼠。 参照盐酸普拉格雷安全性文献及预实验结果, 给药剂量在 2000mg/kg上下浮动, 并据此计算出最大耐受剂量 (MTD)。
观察方法: 给药后, 详细观察给药后 0〜24h内动物的活动情况, 以后每日 观察 1次, 连续观察 7天, 记录临床症状、 死亡数及死亡时间, 结果见表 5。
表 5.大鼠单次给予受试物后至观察期结束动物存活情况
动物数 给药剂量 死亡数 受试物 组别
(只) (g kg) (只)
剂 i t组 1 10 2.75 0 剂 i t组 2 10 2.89 0
2,5-二羟基苯磺 剂 i t组 3 10 3.03 0
酸普拉格雷 (晶
剂 i t组 4 10 3.16 0
型 A)
剂 i t组 5 10 3.25 1 剂 i t组 6 10 3.30 2 剂』誰 7 10 1.90 7 剂』誰 8 10 1.80 5 剂』誰 9 10 1.70 3
盐酸普拉格雷
剂, 1:组 10 10 1.60 3 剂 1:组 11 10 1.50 1 剂, 1:组 12 10 1.40 0 由表 5可见, 2,5-二羟基苯磺酸普拉格雷及盐酸普拉格雷不同剂量单次灌胃 给予大鼠后, 低剂量各组均未见明显不良反应; 当剂量接近 MTD时, 动物出现 少动、 竖毛、 流涎、 俯卧、 侧卧等临床症状, 部分动物于给药后 8〜12h内死亡, 死亡及濒死动物大体解剖后未见各脏器明显病变。 上述实施例为本发明较佳的实施方式, 但本发明的实施方式并不受上述实 施例的限制, 其他的任何未背离本发明的精神实质与原理下所作的改变、 修饰、 替代、 组合、 简化, 均应为等效的置换方式, 都包含在本发明的保护范围之内。

Claims

权 利 要 求
1、 一种普拉格雷的羟基取代苯磺酸盐, 具有下述结构式:
Figure imgf000021_0001
其中, 、 R2、 R3、 和 R5为 H或 OH, 且至少有一个为 OH。
2、 根据权利要求 1所述普拉格雷的羟基取代苯磺酸盐, 其特征在于, 其中 Ri、 和1^为 11或011, 且至少有一个为 OH, R2和 R5为 H; 或者 、 R2和 为11或011, 且至少有一个为 OH, R4和 为11。
3、 根据权利要求 2所述普拉格雷的羟基取代苯磺酸盐, 其特征在于, 所述 普拉格雷的羟基取代苯磺酸盐为 2-乙酰氧基 -5-( α -环丙基羰基 -2-氟苄 基) -4,5,6,7-四氢噻吩并 [3,2-c]吡啶 2,5-二羟基苯磺酸盐; 或者 2-乙酰氧基 -5-( α - 环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶对羟基苯磺酸盐。
4、权利要求 1-3中任一项所述的普拉格雷的羟基取代苯磺酸盐的制备方法, 其特征在于, 包括下述步骤: 1 ) 分别向有机溶剂中加入普拉格雷、 羟基取代苯 磺酸, 搅拌, 溶解, 在一定温度下反应, 得到澄清溶液; 2) 浓缩上述反应液, 静置, 冷却, 抽滤, 得到普拉格雷的羟基取代苯磺酸盐。
5、 根据权利要求 4所述的普拉格雷羟基取代苯磺酸盐的制备方法, 其特征 在于, 步骤 1 ) 中, 所述的反应温度为 0-100 °C, 优选为 30°C。
6、 根据权利要求 4所述的普拉格雷的羟基取代苯磺酸盐的制备方法, 其特 征在于, 步骤 1 ) 中, 所述的有机溶剂为氯仿、 二氯甲垸、 乙酸乙酯、 丙酮、 四 氢呋喃、 甲基四氢呋喃、 二氧六环、 乙腈、 丙腈、 丙醇、 正丁醇、 叔丁醇、 乙 醇、 甲醇中的一种或一种以上, 优选为丙酮。
7、 根据权利要求 4所述的普拉格雷的羟基取代苯磺酸盐的制备方法, 其特 征在于, 步骤 1 ) 中, 所述的普拉格雷与羟基取代苯磺酸的摩尔比为 1:1-2。
8、 根据权利要求 7所述的普拉格雷的羟基取代苯磺酸盐的制备方法, 其特 征在于, 步骤 1 ) 中, 所述的普拉格雷与羟基取代苯磺酸的摩尔比为 1:1.2。
9、 根据权利要求 4所述的普拉格雷的羟基取代苯磺酸盐的制备方法, 其特 征在于, 步骤 1 ) 中, 所述的羟基取代苯磺酸为 2,5-二羟基苯磺酸或对羟基苯磺 酸。
10、 2-乙酰氧基 -5-(α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶 2,5-二羟基苯磺酸盐晶体, 其特征在于, 其粉末 X-衍射图的反射角 2Θ在 8.27士 0.2、 9.41 ±0.2、 16.12±0.2、 18.63±0.2、 19.75±0.2、 24.36±0.2°处有特征吸收 峰。
11、 权利要求 10所述的 2-乙酰氧基 -5-( α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四 氢噻吩并 [3,2-c]吡啶 2,5-二羟基苯磺酸盐晶体,其特征在于,其粉末 X-衍射图的 反射角 2Θ在 7·88±0·2、 8.27±0.2、 9.41±0.2、 14.12±0.2、 16.12±0.2、 18.64 ±0.2、 19.43±0.2、 19.75±0.2、 23.72±0.2、 24.16±0.2、 24.36±0.2、 25.54 + 0.2、 25.82±0.2°处有特征吸收峰。
12、一种药物组合物,含有治疗有效量的权利要求 1-3中任一项所述的普拉 格雷的羟基取代苯磺酸盐或者权利要求 10或 11所述的 2-乙酰氧基 -5-( α -环丙基 羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶 2,5-二羟基苯磺酸盐晶体, 以及一 种或多种药学上可接受的载体。
13、权利要求 1-3中任一项所述的普拉格雷的羟基取代苯磺酸盐,或者权利 要求 10或 11所述的 2-乙酰氧基 -5-(α -环丙基羰基 -2-氟苄基 )-4,5,6,7-四氢噻吩并 [3,2-c]吡啶 2,5-二羟基苯磺酸盐晶体, 或者权利要求 12所述的药物组合物在制 备用于预防或治疗血栓形成或栓塞引起的疾病的药物中的用途。
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WO2007114526A1 (ja) * 2006-04-06 2007-10-11 Daiichi Sankyo Company, Limited 高純度のプラスグレル及びその酸付加塩の製造方法
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