CN107098943A - A kind of preparation method of high-purity Vidarabine Monophosphate - Google Patents

A kind of preparation method of high-purity Vidarabine Monophosphate Download PDF

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CN107098943A
CN107098943A CN201710422276.2A CN201710422276A CN107098943A CN 107098943 A CN107098943 A CN 107098943A CN 201710422276 A CN201710422276 A CN 201710422276A CN 107098943 A CN107098943 A CN 107098943A
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eluent
purity
preparation
vidarabine monophosphate
reaction
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张隆鑫
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Guangdong Fu Fu Pharmaceutical Ltd By Share Ltd
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    • C07ORGANIC CHEMISTRY
    • C07HSUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H19/00Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof
    • C07H19/02Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof sharing nitrogen
    • C07H19/04Heterocyclic radicals containing only nitrogen atoms as ring hetero atom
    • C07H19/16Purine radicals
    • C07H19/20Purine radicals with the saccharide radical esterified by phosphoric or polyphosphoric acids
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07HSUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H1/00Processes for the preparation of sugar derivatives
    • C07H1/02Phosphorylation
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07HSUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H1/00Processes for the preparation of sugar derivatives
    • C07H1/06Separation; Purification

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Abstract

The present invention provides a kind of preparation method of Vidarabine Monophosphate, it is characterised in that the preparation method comprises the following steps:(1)Arabinosy ladenosine is mixed in tricresyl phosphate alkyl ester, adds phosphorylation agent, temperature control reaction;(2)Reaction, which is finished, is slowly added to reaction solution in purified water, hydrolyzes;(3)Organic solvent extraction is added, water layer adjusts PH to 6.0~8.0, obtains upper prop stoste with sodium hydroxide;(4)Absorption is swapped by the cloudy daughter ion exchanger resin of strong base with certain flow velocity after the dilution of upper prop stoste;(5)Eluted with the eluent of debita spissitudo, collect the eluent of OD value >=100;(6)Eluent is concentrated, crystallization, filter to obtain Vidarabine Monophosphate:The step(4)Strong basic type anion-exchange resin is selected from 201 × 7,201 × Final 8 alkalescence anion-exchange resin;The step(5)Eluent select 0.01~0.05mol/L aqueous hydrochloric acid solutions, 0.3%~0.8% sodium-chloride water solution.It is Vidarabine Monophosphate preparation method purity height of the present invention, high income, simple to operate.

Description

A kind of preparation method of high-purity Vidarabine Monophosphate
Technical field
The invention belongs to technical field of medicine synthesis, and in particular to a kind of preparation side of high-purity Vidarabine Monophosphate Method.
Background technology
Vidarabine Monophosphate(Vidarabine MonopHospHate, structural formula one),
Entitled 9- (β-D- the arabinofuranoses)-adenine 5'- phosplates of chemistry.
Vidarabine Monophosphate is the mono-phosphorylated compound of arabinosy ladenosine, is that a kind of artificial synthesized adenosine class resists Viral medicine.Vidarabine Monophosphate enters after cell, and arabinosy ladenosine diphosphonic acid and arabinosy ladenosine triphosphoric acid are generated by phosphorylation, Antiviral activity is derived mainly from arabinosy ladenosine triphosphoric acid.Current Vidarabine Monophosphate is mainly used in chronic viral in China Hepatitis, herpes simplex virus, herpes zoster virus, vaccinia virus and many animals herpesviral and a small number of oncornavirus RNAs Deng.Vidarabine Monophosphate clinical efficacy is definite, but its drug safety and adverse reaction it is similarly subjected to extensive concern.In medicine During thing Clinical practice, the adverse reaction of generation is relevant except the pharmacological property with medication people's constitution and medicine in itself Outside, also there is very big relation with medicine impurity present in, for example, causing the main of allergy using antibiotic such as penicillin Reason is containing macromolecule impurities such as polymers among medicine.Because Vidarabine Monophosphate is big in the quantity of China, it is The security of clinical application is further ensured that, by improving the process exploitation of Vidarabine Monophosphate purity to reduce in medicine Impurity just seems particularly necessary.
At present majority producers prepare synthetic route that Vidarabine Monophosphate generally uses for:Arabinosy ladenosine and POCl3 Phosphorylation reaction is carried out in organic solvent, and Vidarabine Monophosphate is obtained after hydrolysis.
According to reaction mechanism, during phosphorylation reaction, while required 5'- phosplates are obtained, 3' can be also produced, 5'- bisphosphates(Structural formula two), 5', 5'- monophosphate diester(Structural formula three), 3', 5'- monophosphate diester(Structural formula four)Deng Major impurity.
Because above-mentioned major impurity is similar with the physicochemical property of Vidarabine Monophosphate, conventional recrystallization method can not be thorough Bottom is removed, and the finished product purity of gained is relatively low.
Old crooked chisel, Chen Shucheng, leaf wild goose ripple Vidarabine Monophosphates synthetic method improves [J] massages and medical science of recovery therapy, 2013,4(2):98-99 is reported, and arabinosy ladenosine carries out low-temp reaction with POCl3 through high temperature dehydration in triethyl phosphate, Hydrolysis, after dichloromethane extraction, water layer adjusts pH crystallizations to obtain Vidarabine Monophosphate product, and yield is not referred to pure up to more than 98% Degree.
Wang Zhengxiong, Improved synthesis [J] Chemical Engineerings and the equipment, 2008 (12) of ginger Liu Wei Vidarabine Monophosphates:75- 76, the synthetic method of report is similar, and difference is, water layer is adjusted after pH, is slowly added to ethanol crystallization and obtains crude product, crude product Vidarabine Monophosphate finished product is recrystallized to obtain in ethanol, purifying aqueous systems, total recovery 66.6%, content 99.1% there are no purity Report(Explanation:Content is used to reflect the amount of Main Ingredients and Appearance in test sample, is relative relative to one of standard items or reference substance Value, and purity is absolute value, the content for reflecting impurity in test sample.Even if the purity of a medicine is relatively low, its content May also > 100%).
Zhou Lihong(Synthesis, Structural Identification and the quality research [master thesis] of Vidarabine Monophosphate, Central China science and technology University 2006)Use, arabinosy ladenosine reacts with POCl3 in pyridine, acetonitrile mixed system, hydrolyze to obtain crude product, crude product warp Water for injection recrystallizes to obtain Vidarabine Monophosphate finished product, total recovery about 73%.The route needs to use substantial amounts of pyridine and second Nitrile, both expensive, toxicity are larger, and miscible with water, reclaim difficult, and production cost is high, environmental pollution is big, business metaplasia The feasibility of production is relatively low.
Patent CN103204890B is used, and arabinosy ladenosine, in dichloromethane system, adds acid binding agent with POCl3 DIPEA, the reaction of catalyst DMAP, reaction filters to obtain solids after terminating, de- by activated carbon Color etc. post-processes to obtain crude product, most afterwards through recrystallizing to obtain Vidarabine Monophosphate finished product, total recovery 78.1%.The route reaction is separated out Solid directly filter, because reaction terminates rear system and still remains a certain amount of POCl3, unprocessed direct filtering meeting Cause certain potential safety hazard.The patent has no that purity is reported.
The Vidarabine Monophosphate preparation method that current existing patented technology and document are reported is substantially similar, arabinose gland Glycosides and POCl3 carry out phosphorylation reaction in organic solvent, through hydrolysis, crystallization, be recrystallized to give Vidarabine Monophosphate into Product, because the major impurity of Vidarabine Monophosphate is very difficult to remove by conventional recrystallization, therefore existing patent document is almost The not no report on purity data.Scope of the purity of current most products on the market 98.0%~98.5%, by multiple Although recrystallization can improve the purity of product to a certain extent, because Vidarabine Monophosphate has certain dissolving in water Degree, with recrystallization number of times increase, total yield of products is reduced on the contrary.It is badly in need of researching and developing a kind of high-purity, in high yield for this Method prepared by Vidarabine Monophosphate.
The content of the invention
It is an object of the invention to provide a kind of high-purity, the method for the preparation of Vidarabine Monophosphate in high yield.
A kind of preparation method of high-purity Vidarabine Monophosphate, it comprises the following steps:
(1)Arabinosy ladenosine is mixed in tricresyl phosphate alkyl ester, adds phosphorylation agent, temperature control reaction;
(2)Reaction, which is finished, is slowly added to reaction solution in purified water, temperature control hydrolysis;
(3)Organic solvent extraction is added, water layer adjusts pH to 6.0~8.0, obtains upper prop stoste with sodium hydroxide solution;
(4)Upper prop stoste is diluted to OD values 60~100, is handed over certain flow velocity by the cloudy daughter ion exchanger resin of strong base Change absorption;
(5)Eluted with the eluent of debita spissitudo, collect the eluent of OD value >=100;
(6)Eluent is concentrated, aqueous hydrochloric acid solution adjusts pH crystallizations, filter high-purity Vidarabine Monophosphate finished product.
The step(1)Tricresyl phosphate alkyl ester be selected from triethyl phosphate, trimethyl phosphate.
The step(1)The rate of charge of arabinosy ladenosine and POCl3 is 1:1(w/w).
The step(1)Arabinosy ladenosine and the rate of charge of tricresyl phosphate alkyl ester are 1:10(w/v).
The step(1)The temperature of temperature control reaction is -10~0 DEG C, is preferably -5~0 DEG C.
The step(2)Hydrolysis temperature is 0~20 DEG C, preferably 0~10 DEG C.
The step(3)Organic solvent be selected from dichloromethane, adjust PH sodium hydroxide solution molar concentration be 10mol/L.
The step(4)Strong-base anion-exchange resin be selected from 201 × 7,201 × Final 8 alkali anion and exchange tree Fat.
The step(4)Adsorption temp is 10~30 DEG C.
The step(5)Eluent selected from molar concentration be that 0.01~0.05mol/L aqueous hydrochloric acid solutions, mass fraction are 0.3%~0.8% sodium-chloride water solution.
The step(5)Eluting temperature is 10~30 DEG C.
The step(6)Thickening temperature is 40~70 DEG C, preferably 50~60 DEG C.
The step(6)The aqueous hydrochloric acid solution molar concentration for adjusting pH crystallizations is 6mol/L.
The step(6)Recrystallization temperature is 0~10 DEG C, preferably 0~5 DEG C.
Vidarabine Monophosphate preparation method of the present invention in view of following reason and with high-purity, in high yield, behaviour Make advantage convenient, that production serialization degree is high:When the 1st, being adsorbed through strong basic type anion-exchange resin, it is impossible to form anion Impurity such as arabinosy ladenosine, adenine etc. can not carry out ion exchange and be removed first;Above-mentioned major impurity(Structure two, structure three, Structure four)Because the polarity with product has certain difference, it can just be divided with principal component using suitable eluant, eluent From removing, finally without recrystallization, HPLC purity >=99.80% of product after the concentrated crystallization of eluent.2nd, react and hydrolyzed Cheng Zhong, can generate more hydrochloric acid and sulfuric acid, and more inorganic salts are generated during by adjusting pH crystallizations, and salt effect can increase product and exist Solubility in water and reduce yield.After strong base ion exchange resin, most of inorganic salts can not only be removed to disappear The product of high-purity just can be obtained except salt effect, and without recrystallization, so as to greatly improve yield.3rd, due to ion exchange resin Itself possess that equipment is simple and convenient to operate, producing the advantages such as serialization degree height, to be widely used in Pure water preparation, sewage net The every field such as change, chemical synthesis, medicament research and development, food processing, mining, technical conditions are highly developed.
Embodiment:
Embodiment 1
(1)By arabinosy ladenosine(30g)It is mixed in triethyl phosphate(300ml)In, stirring is cooled to -10 DEG C, adds POCl3 (30g)Temperature control -5~0 DEG C stirring reaction;
(2)Reaction is finished, and reaction solution is slowly added in purified water, 0~10 DEG C of hydrolysis of temperature control.Add dichloromethane(300ml/ It is secondary)Twice, water layer obtains upper prop stoste to extracting and demixing with 10mol/L NaOH regulations pH=6.5;
(3)Upper prop stoste is diluted into OD values to 70, passed through with 10ml/min speed equipped with 201 × 7 strong base anion resins Pillar.Absorption is finished, and is eluted with 0.02mol/L HCl with 10ml/min speed, collects the eluent of OD value >=100;
(4)Collection is finished, and eluent is in 50 DEG C of vacuum concentrations, the 6mol/L HCl regulation crystallizations of pH=2.0, filtering, dry single phosphorus Sour arabinosy ladenosine finished product 35.3g, molar yield 86.1%, HPLC purity 99.86%.
Embodiment 2
(1)By arabinosy ladenosine(30g)It is mixed in triethyl phosphate(300ml)In, stirring is cooled to -10 DEG C, adds POCl3 (30g)Temperature control -5~0 DEG C stirring reaction;
(2)Reaction is finished, and reaction solution is slowly added in purified water, 0~10 DEG C of hydrolysis of temperature control.Add dichloromethane(300ml/ It is secondary)Twice, water layer obtains upper prop stoste to extracting and demixing with 10mol/L NaOH regulations pH=7.5;
(3)Upper prop stoste is diluted into OD values to 90, passed through with 10ml/min speed equipped with 201 × 7 strong base anion resins Pillar.Absorption is finished, and is eluted with 0.6% NaCl with 10ml/min speed, collects the eluent of OD value >=100;
(4)Collection is finished, and eluent is in 55 DEG C of vacuum concentrations, the 6mol/L HCl regulation crystallizations of pH=2.0, filtering, dry single phosphorus Sour arabinosy ladenosine finished product 35.7g, molar yield 87.0%, HPLC purity 99.91%.
Embodiment 3
(1)By arabinosy ladenosine(30g)It is mixed in triethyl phosphate(300ml)In, stirring is cooled to -10 DEG C, adds POCl3 (30g)Temperature control -5~0 DEG C stirring reaction;
(2)Reaction is finished, and reaction solution is slowly added in purified water, 0~10 DEG C of hydrolysis of temperature control.Add dichloromethane(300ml/ It is secondary)Twice, water layer obtains upper prop stoste to extracting and demixing with 10mol/L NaOH regulations pH=6.0;
(3)Upper prop stoste is diluted into OD values to 80, passed through with 10ml/min speed equipped with 201 × Final 8 alkaline resin anion (R.A.) Pillar.Absorption is finished, and is eluted with 0.04mol/L HCl with 10ml/min speed, collects the eluent of OD value >=100;
(4)Collection is finished, and eluent is in 50 DEG C of vacuum concentrations, the 6mol/L HCl regulation crystallizations of PH=2.0, filtering, dry single phosphorus Sour arabinosy ladenosine finished product 34.9g, molar yield 85.1%, HPLC purity 99.80%.
Embodiment 4
(1)By arabinosy ladenosine(30g)It is mixed in triethyl phosphate(300ml)In, stirring is cooled to -10 DEG C, adds POCl3 (30g)Temperature control -5~0 DEG C stirring reaction;
(2)Reaction is finished, and reaction solution is slowly added in purified water, 0~10 DEG C of hydrolysis of temperature control.Add dichloromethane(300ml/ It is secondary)Twice, water layer obtains upper prop stoste to extracting and demixing with 10mol/L NaOH regulations pH=7.0;
(3)Upper prop stoste is diluted into OD values to 90, passed through with 10ml/min speed equipped with 201 × Final 8 alkaline resin anion (R.A.) Pillar.Absorption is finished, and is eluted with 0.4% NaCl with 10ml/min speed, is collected the eluent of OD value >=100;
(4)Collection is finished, and eluent is in 50 DEG C of vacuum concentrations, the 6mol/L HCl regulation crystallizations of pH=2.0, filtering, dry single phosphorus Sour arabinosy ladenosine finished product 35.3g, molar yield 86.1%, HPLC purity 99.88%.
Embodiment 5
(1)By arabinosy ladenosine(30g)It is mixed in trimethyl phosphate(300ml)In, stirring is cooled to -10 DEG C, adds POCl3 (30g)Temperature control -5~0 DEG C stirring reaction;
(2)Reaction is finished, and reaction solution is slowly added in purified water, 0~10 DEG C of hydrolysis of temperature control.Add dichloromethane(300ml/ It is secondary)Twice, water layer obtains upper prop stoste to extracting and demixing with 10mol/L NaOH regulations pH=7.8;
(3)Upper prop stoste is diluted into OD values to 100, passed through with 10ml/min speed equipped with 201 × 7 strong base anion resins Pillar.Absorption is finished, and is eluted with 0.05mol/L HCl with 10ml/min speed, collects the eluent of OD value >=100;
(4)Collection is finished, and eluent is in 50 DEG C of vacuum concentrations, the 6mol/L HCl regulation crystallizations of pH=2.0, filtering, dry single phosphorus Sour arabinosy ladenosine finished product 34.7g, molar yield 84.6%, HPLC purity 99.82%.
Embodiment 6
(1)By arabinosy ladenosine(30g)It is mixed in trimethyl phosphate(300ml)In, stirring is cooled to -10 DEG C, adds POCl3 (30g)Temperature control -5~0 DEG C stirring reaction;
(2)Reaction is finished, and reaction solution is slowly added in purified water, 0~10 DEG C of hydrolysis of temperature control.Add dichloromethane(300ml/ It is secondary)Twice, water layer obtains upper prop stoste to extracting and demixing with 10mol/L NaOH regulations pH=6.8;
(3)Upper prop stoste is diluted into OD values to 75, passed through with 10ml/min speed equipped with 201 × 7 strong base anion resins Pillar.Absorption is finished, and is eluted with 0.5% NaCl with 10ml/min speed, collects the eluent of OD value >=100;
(4)Collection is finished, and eluent is in 55 DEG C of vacuum concentrations, the 6mol/L HCl regulation crystallizations of pH=2.0, filtering, dry single phosphorus Sour arabinosy ladenosine finished product 35.5g, molar yield 86.6%, HPLC purity 99.89%.
Embodiment 7
(1)By arabinosy ladenosine(30g)It is mixed in trimethyl phosphate(300ml)In, stirring is cooled to -10 DEG C, adds POCl3 (30g)Temperature control -5~0 DEG C stirring reaction;
(2)Reaction is finished, and reaction solution is slowly added in purified water, 0~10 DEG C of hydrolysis of temperature control.Add dichloromethane(300ml/ It is secondary)Twice, water layer obtains upper prop stoste to extracting and demixing with 10mol/L NaOH regulations pH=6.8;
(3)Upper prop stoste is diluted into OD values to 60, passed through with 10ml/min speed equipped with 201 × Final 8 alkaline resin anion (R.A.) Pillar.Absorption is finished, and is eluted with 0.02mol/L HCl with 10ml/min speed, collects the eluent of OD value >=100;
(4)Collection is finished, and eluent is in 55 DEG C of vacuum concentrations, the 6mol/L HCl regulation crystallizations of PH=2.0, filtering, dry single phosphorus Sour arabinosy ladenosine finished product 34.6g, molar yield 84.4%, HPLC purity 99.80%.
Embodiment 8
(1)By arabinosy ladenosine(30g)It is mixed in trimethyl phosphate(300ml)In, stirring is cooled to -10 DEG C, adds POCl3 (30g)Temperature control -5~0 DEG C stirring reaction;
(2)Reaction is finished, and reaction solution is slowly added in purified water, 0~10 DEG C of hydrolysis of temperature control.Add dichloromethane(300ml/ It is secondary)Twice, water layer obtains upper prop stoste to extracting and demixing with 10mol/L NaOH regulations pH=7.5;
(3)Upper prop stoste is diluted into OD values to 85, passed through with 10ml/min speed equipped with 201 × Final 8 alkaline resin anion (R.A.) Pillar.Absorption is finished, and is eluted with 0.5% NaCl with 10ml/min speed, collects the eluent of OD value >=100;
(4)Collection is finished, and eluent is in 55 DEG C of vacuum concentrations, the 6mol/L HCl regulation crystallizations of pH=2.0, filtering, dry single phosphorus Sour arabinosy ladenosine finished product 35.1g, molar yield 85.6%, HPLC purity 99.85%.

Claims (5)

1. a kind of preparation method of high-purity Vidarabine Monophosphate, this method comprises the following steps:
(1)Arabinosy ladenosine is mixed in tricresyl phosphate alkyl ester, adds phosphorylation agent, temperature control reaction;
(2)Reaction, which is finished, is slowly added to reaction solution in purified water, temperature control hydrolysis;
(3)Organic solvent extraction is added, water layer adjusts pH to 6.0~8.0, obtains upper prop stoste with sodium hydroxide solution;
(4)Upper prop stoste is diluted to OD values 60~100, is handed over certain flow velocity by the cloudy daughter ion exchanger resin of strong base Change absorption;
(5)Eluted with the eluent of debita spissitudo, collect the eluent of OD value >=100;
(6)Eluent is concentrated, aqueous hydrochloric acid solution adjusts pH crystallizations, filter high-purity Vidarabine Monophosphate finished product.
2. a kind of preparation method of high-purity Vidarabine Monophosphate as claimed in claim 1, it is characterised in that:The step (1)The rate of charge of arabinosy ladenosine and POCl3 is 1:1(w/w).
3. a kind of preparation method of high-purity Vidarabine Monophosphate as claimed in claim 1, it is characterised in that:The step (4)Strong-base anion-exchange resin be selected from 201 × 7,201 × Final 8 alkalescence anion-exchange resin.
4. a kind of preparation method of high-purity Vidarabine Monophosphate as claimed in claim 1, it is characterised in that:The step (5)Eluent selected from molar concentration be that 0.01~0.05mol/L aqueous hydrochloric acid solutions, mass fraction are 0.3%~0.8% sodium chloride The aqueous solution.
5. a kind of preparation method of high-purity Vidarabine Monophosphate as claimed in claim 1, it is characterised in that:The step (6)Specially by eluent in 50~60 DEG C of vacuum concentrations, the crystallization of pH=2.0 is adjusted with 6mol/L HCl, it is filtering, singly dry Vidarabine phosphate finished product.
CN201710422276.2A 2017-06-07 2017-06-07 A kind of preparation method of high-purity Vidarabine Monophosphate Pending CN107098943A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107793458A (en) * 2017-09-22 2018-03-13 海南葫芦娃药业集团股份有限公司 A kind of preparation method of Vidarabine Monophosphate
CN110407892A (en) * 2019-08-21 2019-11-05 甘肃泰升化工科技有限公司 A kind of preparation method of Vidarabine Monophosphate

Citations (5)

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Publication number Priority date Publication date Assignee Title
US3703507A (en) * 1969-09-26 1972-11-21 Parke Davis & Co Process for the production of 9-(beta-d-arabinofuranosyl) adenine,5'-phosphate and salts thereof
CN101023968A (en) * 2007-02-09 2007-08-29 上海大学 Coenzyme composition preparing method
CN102079766A (en) * 2009-11-29 2011-06-01 海南中化联合制药工业股份有限公司 Preparation method of vidarabine monophosphate
CN103122017A (en) * 2013-02-06 2013-05-29 广东先强药业股份有限公司 Refining method of vidarabine monophosphate
CN103204890A (en) * 2013-02-22 2013-07-17 广东先强药业股份有限公司 Phosphorylation method for preparing vidarabine monophosphate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703507A (en) * 1969-09-26 1972-11-21 Parke Davis & Co Process for the production of 9-(beta-d-arabinofuranosyl) adenine,5'-phosphate and salts thereof
CN101023968A (en) * 2007-02-09 2007-08-29 上海大学 Coenzyme composition preparing method
CN102079766A (en) * 2009-11-29 2011-06-01 海南中化联合制药工业股份有限公司 Preparation method of vidarabine monophosphate
CN103122017A (en) * 2013-02-06 2013-05-29 广东先强药业股份有限公司 Refining method of vidarabine monophosphate
CN103204890A (en) * 2013-02-22 2013-07-17 广东先强药业股份有限公司 Phosphorylation method for preparing vidarabine monophosphate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107793458A (en) * 2017-09-22 2018-03-13 海南葫芦娃药业集团股份有限公司 A kind of preparation method of Vidarabine Monophosphate
CN107793458B (en) * 2017-09-22 2020-04-21 海南葫芦娃药业集团股份有限公司 Preparation method of vidarabine monophosphate
CN110407892A (en) * 2019-08-21 2019-11-05 甘肃泰升化工科技有限公司 A kind of preparation method of Vidarabine Monophosphate

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