CN106243083A - A kind of imatinib preparation method - Google Patents

A kind of imatinib preparation method Download PDF

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Publication number
CN106243083A
CN106243083A CN201610542560.9A CN201610542560A CN106243083A CN 106243083 A CN106243083 A CN 106243083A CN 201610542560 A CN201610542560 A CN 201610542560A CN 106243083 A CN106243083 A CN 106243083A
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imatinib
pyrimidine
pyridine
preparation
chloro
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CN106243083B (en
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杨继斌
朱金龙
杨鑫杰
姚建财
张超
王奇超
程宜兴
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Hongguan Bio Pharma Co ltd
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ZHEJIANG HONGGUAN BIO-PHARMA Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D401/00Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/04Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

The present invention relates to pharmaceutical technology field, particularly to the synthesis technique of a kind of antitumor drug.It is an object of the invention to provide a kind of simple to operate, raw material is easy to get, reactions steps is short, yield is high and eco-friendly imatinib preparation method.In the imatinib preparation method of the present invention, the formation of pyrimidine ring has been abandoned the bigger cyanamide method of toxicity and has had the phosphorus oxychloride method of severe corrosive, by 2, Suzuki between 4 dichloro pyrimidines with 3 pyridine borate reacts, and one-step method quickly obtains key intermediate 2 chlorine 4 (3 pyridine radicals) pyrimidine;Make use of 2 on 2 chlorine 4 (3 pyridine radicals) pyrimidines easily by the feature of nucleopilic reagent attack, pass through nucleophilic substitution, prepare imatinib with higher conversion ratio, abandoned the metal catalysed processes etc. employed in many documents and be difficult to industrialized means.Raw material of the present invention is easy to get, reactions steps is short, yield is high and environmental friendliness.

Description

A kind of imatinib preparation method
Technical field
The present invention relates to pharmaceutical technology field, particularly to the synthesis technique of a kind of antitumor drug.
Background technology
Imatinib mesylate (Fig. 1) is a kind of tyrosine kinase micromolecular inhibitor (small molecule TKI), Can optionally be incorporated into corresponding tyrosine kinase receptor, including C-kit receptor, (the platelet-derived life of PDGFRA receptor Growth factor receptor body), the ATP-binding site of Bcr-Abl and stem cell factor receptor SCFR etc., stop phosphate group from ATP to egg White matter substrate shifts, be allowed to can not the phosphorylation of catalytic tyrosine residue and activate the signal transduction of downstream effect molecule, and then Stop the continuous proliferation of cell, and recover the normal apoptotic program of cell.This medicine may be used for treating Philadelphia Chromosome Positive Chronic myelocytic leukemia (PH+CML) chronic phase, accelerated period and acute transformation phase patient, Philadelphia Chromosome Positive can be treated Acute lymphoblastic leukemia (Ph+ALL) patient, it is also possible to treatment can not excise or occur the malignant gastrointestinal interstitial of transfer to swell The adult patient of tumor (GIST).
Report that the document of imatinib (Imatinib) synthetic route is a lot of at present, be reported in the Europe of 1993 the earliest specially Profit (EP564409).Specifically route is as shown in Figure 2: 2-methyl-5-nitro aniline (1) and cyanamide (2) react generation guanidine Compound (3);Pyrimidine compound (4) is formed again with intermediate (6) cyclization;Palladium carbon hydro-reduction nitro obtains intermediate (7);Finally exist Pyridine is condensed into imatinib with acyl chlorides (8).This route is one of the most the more commonly used imatinib synthetic method, but The shortcoming that it exists has: 1, employ severe toxicity raw material cyanamide;2, employing Pd/C costly is reducing catalyst so that Cost increase;3, condensation reaction uses abnormal smells from the patient and the biggest pyridine of toxicity to be solvent, is unfavorable for that production is amplified in workshop.
Within 2008, pay vertical strong grade on " Chinese Journal of Pharmaceuticals ", to report final step cyclization formation pyrimidine ring and make The method obtaining imatinib.Concrete route is as shown in Figure 3: 3-nitro-4-methyl-aniline (9) first with to chloromethyl benzoic acid chlorides (10) reaction generates amide (11);Generation key intermediate (13) is reacted again with N methyl piperazine (12);Palladium carbon hydro-reduction nitre Base obtains compound (14);Guanidine compound (16) is prepared with cyanamide condensation;Finally prepare her horse with intermediate (17) cyclization to replace Buddhist nun.The shortcoming of this route has: 1, employ expensive Pd/C and the bigger cyanamide of toxicity;2, pyrimidine ring-closure reaction Yield is relatively low, and this step is placed on final step so that overall yield is substantially reduced.
Loiseleur et al. (WO20030066613) reports and avoids using cyanamide is that raw material cyclization obtains pyrimidine ring, And use the method synthesis imatinib of metal catalytic C-N coupling.Concrete route is as shown in Figure 4: intermediate (21) is directly and guanidine (22) reaction, cyclization prepares pyrimidines (23);Again with intermediate (20) at organophosphor ligand rac-Binap and Pd2 (dba)3Effect under, occur C-N coupling reaction, prepare imatinib.This is a relatively new synthetic route, abandons Use the cyanamide that toxicity is bigger, but there is also some problems: the Pd/C catalyst 1, used and phosphorus part price comparison Costliness, for industrialized production, cost is greatly improved;2, the requirement of crude drug heavy metal content is higher, this route Final step employs heavy metal palladium, purification proposes the highest requirement, is unfavorable for industrialized production.
Document (Bioorganic&Medicinal Chemistry Letters, 2009,6,140,619-623) reports A kind of method similar with above-mentioned Article 1 route, concrete route is as it is shown in figure 5, difference is: 1, use stannum dichloride for also Former dose of reduction nitro;2, after Imatinib amine (29) generates, first with chloromethyl benzoic acid chlorides (30) is occurred acylation reaction, the most again with N methyl piperazine (32) reaction generates imatinib.This route is long, and the shortcoming that simultaneously there is also includes: 1, cyanamide and SnCl2Toxicity is relatively big, and environmental conservation can be caused bigger pressure by the waste liquid produced after latter reaction is complete;2, final step intermediate (31), when reacting with N methyl piperazine, using high boiling DMF is solvent, easily causes end product dissolvent residual defective.
Document (US20060149061) report is prepared organic zinc reagent (34) by 3-bromopyridine (33), then with 2,4-dichloro There is Negishi coupling reaction in pyrimidine (35), generates key intermediate (36);Or obtain centre from compound (37) through urea cyclization Body (38), then obtain intermediate (36) through phosphorus oxychloride chloro;Intermediate (36) and compound (39) nucleo philic substitution reaction Obtain intermediate (42);Also there is document (Organic Process Research&Development, 2008,12,490 495) Report from compound (40) and (41), reacted by Ullman and obtain key intermediate (42) smoothly, concrete route such as Fig. 6 institute Show.The most a few class schemes all have certain creativeness, but they have certain limitation for industrialized production, than As: 1, Negishi coupling reaction condition controls strict, and prepares organic zinc reagent and need to use n-BuLi, and industrialized production is pacified Full hidden danger is big;2, substantial amounts of strongly acid wastewater can be produced with phosphorus oxychloride chloro, big for environment pollution;3, Ullman reaction condition Acutely, and the waste liquid that reaction produces is containing a large amount of copper ions, equally can be to environment.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that one is simple to operate, raw material is easy to get, reactions steps Short, yield is high and eco-friendly imatinib preparation method.
In order to achieve the above object, a kind of imatinib preparation method of the present invention, concrete reactions steps is as follows:
The first step: the synthesis chloro-4-of 2-(3-pyridine radicals) pyrimidine
By 2,4-dichloro pyrimidine is dissolved in the mixed solvent of Isosorbide-5-Nitrae-dioxane and water, add 3-pyridine borate, weak base and Pd(dppf)Cl2, it is gradually heating to 70-130 DEG C after system being replaced with argon, reacts 2-6 hour;After reaction completely, system subtracts Pressure concentrates and removes major part solvent, adds ethyl acetate and water, extracts separatory, and aqueous phase is extracted with ethyl acetate again, merges organic Phase, then wash with water and saturated aqueous common salt, separatory, organic facies adds anhydrous sodium sulfate and is dried 3 hours, filtering and concentrating, obtain slightly Product;Crude product adds petroleum ether and the mixed solvent of ethyl acetate, stirring to pulp 1 hour, filters, be vacuum dried to obtain product 2- Chloro-4-(3-pyridine radicals) pyrimidine;
As preferably, in described mixed solvent, the volume ratio of Isosorbide-5-Nitrae-dioxane and water is (4-5): 1;
As preferably, described weak base is at least one in potassium carbonate, potassium acetate, cesium carbonate, sodium carbonate, triethylamine;
As preferably, described 2,4-dichloro pyrimidine, 3-pyridine borate, weak base and Pd (dppf) Cl2Mol ratio be 1: (0.8-2.0): (1.5-3.5): (0.05-0.3);
As further preferably, described 2,4-dichloro pyrimidine, 3-pyridine borate, weak base and Pd (dppf) Cl2Mol ratio For 1:1.2:2:0.1;
As preferably, described argon is gradually heating to 90 DEG C after system being replaced, and reacts 4 hours;
As preferably, the volume ratio of described petroleum ether and ethyl acetate is 1:(0.1-0.5)
Second step: synthesis imatinib
N-(3-amino-4-aminomethyl phenyl)-4-(4-thyl-piperazin-1-methyl) benzamide is dissolved in organic solvent, then It is separately added into the chloro-4-of 2-(3-pyridine radicals) pyrimidine and glacial acetic acid, is warming up to 100-120 DEG C, react 5-8 hour;After completion of the reaction System concentrating under reduced pressure removes solvent, adds dichloromethane, respectively with saturated sodium bicarbonate aqueous solution and saturated sodium-chloride water solution Washing, separatory, organic facies anhydrous sodium sulfate is dried, and filters, is concentrated to give imatinib.
N-(3-amino-4-aminomethyl phenyl)-4-(4-thyl-piperazin-1-methyl) benzamide is by patent of invention Method in 201110055144 prepares.
As preferably, it is warming up to 110 DEG C, reacts 6 hours.
As preferably, described organic solvent be in Isosorbide-5-Nitrae-dioxane, isopropanol, n-butyl alcohol, the tert-butyl alcohol, ethylene glycol extremely Few one.
As preferably, described N-(3-amino-4-aminomethyl phenyl)-4-(4-thyl-piperazin-1-methyl) benzamide, ice vinegar The mol ratio of acid and the chloro-4-of 2-(3-pyridine radicals) pyrimidine is 1:(30-60): 1.
The present invention is according to 2, and the activity difference of two chlorine in 4-dichloro pyrimidine, the chlorine on 4-position is optionally phonetic with 3-boric acid There is Suzuki reaction in pyridine, prepares the chloro-4-of 2-(3-pyridine radicals) pyrimidine;By using Pd (dppf) Cl2Catalyst and Isosorbide-5-Nitrae-two The reaction system that oxygen six rings/water mixed solvent matches, improves reaction rate, and reaction condition gentleness is easy to control, and conversion ratio is high; Purifying crude means are without column chromatography, but the method passed through extraction, wash and pull an oar, it is possible to obtain preferable purity, profit In industrialized production.Under Isosorbide-5-Nitrae-dioxane solvent and acid system, intermediate is pulled out the amide generated after hydrogen Occur nucleophilic substitution to prepare imatinib in the 2-position of the chloro-4-of 2-(3-pyridine radicals) pyrimidine;The present invention avoids using sodium hydrogen Etc. hazardous agents, and glacial acetic acid is the relatively mild reagent that compares, the most dangerous reaction or risky operation, is in the reaction Make solvent and make again catalyst, after reaction terminates, can concentration and recovery acetic acid, recycling.
Main advantages of the present invention are: 1, the formation of pyrimidine ring has been abandoned the bigger cyanamide method of toxicity and had strong Corrosive phosphorus oxychloride method, by 2, the Suzuki between 4-dichloro pyrimidine with 3-pyridine borate reacts, and one-step method is quick to be obtained To the chloro-4-of key intermediate 2-(3-pyridine radicals) pyrimidine;2, make use of the 2-position on the chloro-4-of 2-(3-pyridine radicals) pyrimidine the closeest The feature of core reagent attack, by nucleophilic substitution, prepares imatinib with higher conversion ratio, has abandoned in many documents The metal catalysed processes used etc. are difficult to industrialized means;3, raw material is easy to get, reactions steps is short, yield is high and environmental friendliness etc. Feature.
Figure of description
Fig. 1 is the molecular structural formula of imatinib mesylate
Fig. 2 is imatinib synthetic route one
Fig. 3 is imatinib synthetic route two
Fig. 4 is imatinib synthetic route three
Fig. 5 is imatinib synthetic route four
Fig. 6 is imatinib synthetic route five
Fig. 7 is the synthetic route chart of the present invention
Detailed description of the invention
Embodiment 1
The first step: the synthesis chloro-4-of 2-(3-pyridine radicals) pyrimidine
In 250mL there-necked flask, 2,4-dichloro pyrimidines (5.0g, 33.56mmol) are dissolved in Isosorbide-5-Nitrae-dioxane and water In mixed solvent (4:1,50mL), add 3-pyridine borate (4.95g, 40.27mmol), potassium carbonate (9.28g, 67.12mmol) with Pd (dppf) Cl2(2.45g,3.36mmol);After system being replaced three times with argon, it is gradually heating to 90 DEG C, react 4 hours;System concentrating under reduced pressure removes major part solvent after completion of the reaction, adds ethyl acetate (150mL) and water (100mL), extracting separatory, aqueous phase extracts by ethyl acetate (80mL) again, merges organic facies, then with water (80mL x 2) and saturated Saline solution (80mL x 2) washs, separatory, adds anhydrous sodium sulfate and be dried 3 hours in organic facies, and filtering and concentrating obtains crude product;Slightly Product add petroleum ether (32mL) and ethyl acetate (6mL) stirs 1 hour, filter, be vacuum dried to obtain product 2-chloro-4-(3-pyrrole Piperidinyl) pyrimidine 4.8g, yield 74.6%, purity HPLC is more than 95%.
Second step: synthesis imatinib
In 100mL single port flask, N-(3-amino-4-aminomethyl phenyl)-4-(4-thyl-piperazin-1-methyl) benzamide (3.0g, 8.86mmol) is dissolved in Isosorbide-5-Nitrae-dioxane (30mL), then is separately added into the chloro-4-of 2-(3-pyridine radicals) pyrimidine (1.70g, 8.86mmol) and glacial acetic acid (20mL), be warming up to 110 DEG C, reacts 6 hours;System concentrating under reduced pressure removes after completion of the reaction Remove solvent, add dichloromethane (60mL), water-soluble with saturated sodium bicarbonate aqueous solution (40mL x 2) and saturated sodium-chloride respectively Liquid (40mL x 2) washs, separatory, and organic facies anhydrous sodium sulfate is dried, and filters, is concentrated to give imatinib 3.7g, yield 84.5%, purity HPLC is more than 95%.
Embodiment 2
The first step: the synthesis chloro-4-of 2-(3-pyridine radicals) pyrimidine
In 250mL there-necked flask, 2,4-dichloro pyrimidines (5.0g, 33.56mmol) are dissolved in Isosorbide-5-Nitrae-dioxane and water In mixed solvent (5:1,50mL), add 3-pyridine borate (4.95g, 40.27mmol), cesium carbonate (9.28g, 67.12mmol) with Pd (dppf) Cl2(2.45g,3.36mmol);After system being replaced three times with argon, it is gradually heating to 70 DEG C, react 6 hours;System concentrating under reduced pressure removes major part solvent after completion of the reaction, adds ethyl acetate (150mL) and water (100mL), extracting separatory, aqueous phase extracts by ethyl acetate (80mL) again, merges organic facies, then with water (80mL x 2) and saturated Saline solution (80mL x 2) washs, separatory, adds anhydrous sodium sulfate and be dried 3 hours in organic facies, and filtering and concentrating obtains crude product;Slightly Product add petroleum ether (30mL) and ethyl acetate (3mL) stirs 1 hour, filter, be vacuum dried to obtain product 2-chloro-4-(3-pyrrole Piperidinyl) pyrimidine 4.7g, yield 73.1%, purity HPLC is more than 95%.
Second step: synthesis imatinib
In 100mL single port flask, N-(3-amino-4-aminomethyl phenyl)-4-(4-thyl-piperazin-1-methyl) benzamide (3.0g, 8.86mmol) is dissolved in Isosorbide-5-Nitrae-dioxane (30mL), then is separately added into the chloro-4-of 2-(3-pyridine radicals) pyrimidine (1.70g, 8.86mmol) and glacial acetic acid (20mL), be warming up to 100 DEG C, reacts 8 hours;System concentrating under reduced pressure removes after completion of the reaction Remove solvent, add dichloromethane (60mL), water-soluble with saturated sodium bicarbonate aqueous solution (40mL x 2) and saturated sodium-chloride respectively Liquid (40mL x 2) washs, separatory, and organic facies anhydrous sodium sulfate is dried, and filters, is concentrated to give imatinib 3.68g, yield 84.0%, purity HPLC is more than 95%.
Embodiment 3
The first step: the synthesis chloro-4-of 2-(3-pyridine radicals) pyrimidine
In 250mL there-necked flask, 2,4-dichloro pyrimidines (5.0g, 33.56mmol) are dissolved in Isosorbide-5-Nitrae-dioxane and water In mixed solvent (4.5:1,50mL), add 3-pyridine borate (4.95g, 40.27mmol), cesium carbonate (9.28g, 67.12mmol) with Pd (dppf) Cl2(2.45g,3.36mmol);After system being replaced three times with argon, gradually heat up and be heated to Backflow, reacts 2 hours;System concentrating under reduced pressure removes major part solvent after completion of the reaction, adds ethyl acetate (150mL) and water (100mL), extracting separatory, aqueous phase extracts by ethyl acetate (80mL) again, merges organic facies, then with water (80mL x 2) and saturated Saline solution (80mL x 2) washs, separatory, adds anhydrous sodium sulfate and be dried 3 hours in organic facies, and filtering and concentrating obtains crude product;Slightly Product add petroleum ether (32mL) and ethyl acetate (6mL) stirs 1 hour, filter, be vacuum dried to obtain product 2-chloro-4-(3-pyrrole Piperidinyl) pyrimidine 4.65g, yield 72.3%, purity HPLC is more than 95%.
Second step: synthesis imatinib
In 100mL single port flask, N-(3-amino-4-aminomethyl phenyl)-4-(4-thyl-piperazin-1-methyl) benzamide (3.0g, 8.86mmol) is dissolved in ethylene glycol (30mL), then be separately added into the chloro-4-of 2-(3-pyridine radicals) pyrimidine (1.70g, 8.86mmol) with glacial acetic acid (20mL), it is warming up to 100 DEG C, reacts 5 hours;System concentrating under reduced pressure removes solvent after completion of the reaction, Add dichloromethane (60mL), respectively with saturated sodium bicarbonate aqueous solution (40mL x 2) and saturated sodium-chloride water solution (40mL X 2) washing, separatory, organic facies anhydrous sodium sulfate is dried, and filters, is concentrated to give imatinib 3.63g, yield 82.9%, purity HPLC is more than 95%.

Claims (10)

1. an imatinib preparation method, it is characterised in that: comprise the steps:
The first step: the synthesis chloro-4-of 2-(3-pyridine radicals) pyrimidine
By 2,4-dichloro pyrimidine is dissolved in the mixed solvent of Isosorbide-5-Nitrae-dioxane and water, adds 3-pyridine borate, weak base and Pd (dppf)Cl2, it is gradually heating to 70-130 DEG C after system being replaced with argon, reacts 2-6 hour;System decompression after reaction completely Concentrating and remove major part solvent, add ethyl acetate and water, extract separatory, aqueous phase is extracted with ethyl acetate again, merges organic facies, Again with water and saturated aqueous common salt washing, separatory, organic facies adds anhydrous sodium sulfate and is dried 3 hours, filtering and concentrating, obtain crude product; Crude product adds petroleum ether and the mixed solvent of ethyl acetate, stirring to pulp 1 hour, filters, be vacuum dried to obtain the chloro-4-of product 2- (3-pyridine radicals) pyrimidine;
Second step: synthesis imatinib
N-(3-amino-4-aminomethyl phenyl)-4-(4-thyl-piperazin-1-methyl) benzamide is dissolved in Isosorbide-5-Nitrae-dioxane, then It is separately added into the chloro-4-of 2-(3-pyridine radicals) pyrimidine and glacial acetic acid, is warming up to 100-120 DEG C, react 5-8 hour;After completion of the reaction System concentrating under reduced pressure removes solvent, adds dichloromethane, respectively with saturated sodium bicarbonate aqueous solution and saturated sodium-chloride water solution Washing, separatory, organic facies anhydrous sodium sulfate is dried, and filters, is concentrated to give imatinib.
A kind of imatinib preparation method the most according to claim 1, it is characterised in that: in mixed solvent described in the first step The volume ratio of 1,4-dioxane and water is (4-5): 1.
A kind of imatinib preparation method the most according to claim 1, it is characterised in that: weak base described in the first step is carbonic acid At least one in potassium, potassium acetate, cesium carbonate, sodium carbonate, triethylamine.
A kind of imatinib preparation method the most according to claim 1, it is characterised in that: described in the first step 2,4-dichloro is phonetic Pyridine, 3-pyridine borate, weak base and Pd (dppf) Cl2Mol ratio be 1:(0.8-2.0): (1.5-3.5): (0.05-0.3).
A kind of imatinib preparation method the most according to claim 4, it is characterised in that: described in the first step 2,4-dichloro is phonetic Pyridine, 3-pyridine borate, weak base and Pd (dppf) Cl2Mol ratio be 1:1.2:2:0.1.
A kind of imatinib preparation method the most according to claim 1, it is characterised in that: system is put by first step argon It is gradually heating to 90 DEG C after changing, reacts 4 hours.
A kind of imatinib preparation method the most according to claim 1, it is characterised in that: petroleum ether described in the first step and second The volume ratio of acetoacetic ester is 1:(0.1-0.5).
A kind of imatinib preparation method the most according to claim 1, it is characterised in that: second step is warming up to 110 DEG C, instead Answer 6 hours.
A kind of imatinib preparation method the most according to claim 1, it is characterised in that: organic solvent described in second step is At least one in 1,4-dioxane, isopropanol, n-butyl alcohol, the tert-butyl alcohol, ethylene glycol.
A kind of imatinib preparation method the most according to claim 1, it is characterised in that: (the 3-ammonia of N-described in second step Base-4-aminomethyl phenyl)-4-(4-thyl-piperazin-1-methyl) benzamide, the rubbing of glacial acetic acid and the chloro-4-of 2-(3-pyridine radicals) pyrimidine That ratio is 1:(30-60): 1.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101016293A (en) * 2007-02-14 2007-08-15 杭州盛美医药科技开发有限公司 Preparing method of imatinib
CN102548987A (en) * 2009-07-14 2012-07-04 江苏迈度药物研发有限公司 Fluoro-substituted compounds as kinase inhibitors and methods of use thereof
WO2013066839A2 (en) * 2011-10-31 2013-05-10 Glaxosmithkline Llc Compounds and methods
CN104230885A (en) * 2013-06-09 2014-12-24 北大方正集团有限公司 A preparing method of imatinib

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101016293A (en) * 2007-02-14 2007-08-15 杭州盛美医药科技开发有限公司 Preparing method of imatinib
CN102548987A (en) * 2009-07-14 2012-07-04 江苏迈度药物研发有限公司 Fluoro-substituted compounds as kinase inhibitors and methods of use thereof
WO2013066839A2 (en) * 2011-10-31 2013-05-10 Glaxosmithkline Llc Compounds and methods
CN104230885A (en) * 2013-06-09 2014-12-24 北大方正集团有限公司 A preparing method of imatinib

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Denomination of invention: A kind of preparation method of imatinib

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Granted publication date: 20181030

Pledgee: Bank of Hangzhou Limited by Share Ltd. Tongxiang branch

Pledgor: HONGGUAN BIO-PHARMA Co.,Ltd.

Registration number: Y2022330001992

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Granted publication date: 20181030

Pledgee: Bank of Hangzhou Limited by Share Ltd. Tongxiang branch

Pledgor: HONGGUAN BIO-PHARMA Co.,Ltd.

Registration number: Y2022330001992

PC01 Cancellation of the registration of the contract for pledge of patent right