CN101613323B - Method for synthesizing medicinal sulfadiazine silver - Google Patents

Method for synthesizing medicinal sulfadiazine silver Download PDF

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CN101613323B
CN101613323B CN2009101621018A CN200910162101A CN101613323B CN 101613323 B CN101613323 B CN 101613323B CN 2009101621018 A CN2009101621018 A CN 2009101621018A CN 200910162101 A CN200910162101 A CN 200910162101A CN 101613323 B CN101613323 B CN 101613323B
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sodium
solution
silver
sulfadiazine
trifluoromethanesulfonic acid
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CN101613323A (en
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帅放文
王向峰
章家伟
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Hunan Er Kang Pharmaceutical Co Ltd
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Hunan Er Kang Pharmaceutical Co Ltd
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Abstract

The invention provides a method for synthesizing medicinal sulfadiazine silver. The method comprises the steps of allowing silver nitrate solution and sulfadiazine sodium solution which are fed and stirred simultaneously to react in a reaction tank, standing, draining, centrifugally drying and obtaining a sulfadiazine silver product, wherein the synthesis reaction temperature of silver nitrate and sulfadiazine sodium is 45 to 55 DEG C, and trifluoromethanesulfonic acid (salt) catalysts are used in the process of utilizing sulfadiazine powder and sodium hydroxide to prepare the sulfadiazine sodium.

Description

A kind of synthetic drug is with the method for Sulfadiazine Silver
Technical field
The present invention relates to a kind of compound method of medicinal Sulfadiazine Silver.
Background technology
Sulfadiazine Silver is white or off-white color crystalline powder, meets light or meets hot perishable.These article are all insoluble in water, ethanol, trichloromethane or ether.Sulfadiazine Silver records in " second one of Chinese pharmacopoeia version in 2005, its classification is a disulfonamide.At present, the purity of the medicament prodn of the Sulfadiazine Silver on the market is about about 98%.For this purity, also has the space of rising.In addition, the working method of Sulfadiazine Silver is that Sulphadiazine Sodium powder and sodium hydroxide react the generation Suthogen with 1: 1 ratio, and Suthogen reacts in 1: 1 ratio with Silver Nitrate and generates Sulfadiazine Silver afterwards.In actual production, in order to improve the utilization ratio of comparatively expensive Silver Nitrate, usually with the excessive 10%mol of Sulphadiazine Sodium.After reaction finished, this excessive part can't reclaim, and can only stay in the waste liquid and was dropped.
Summary of the invention
In order to overcome the above problems, the invention provides the method for a kind of synthetic drug with Sulfadiazine Silver.
The object of the present invention is to provide the method for a kind of synthetic drug, comprising with Sulfadiazine Silver: in the presence of trifluoromethanesulfonic acid (salt) as catalyzer, make silver nitrate solution and Sulphadiazine Sodium sodium solution with etc. mol ratio react 45-55 ℃ temperature.
In a kind of concrete mode, the temperature of reaction of Silver Nitrate and Suthogen is 45-55 ℃.Term " trifluoromethanesulfonic acid (salt) " is meant trifluoromethanesulfonic acid or fluoroform sulphonate.
In the present invention, operable catalyzer can be selected from trifluoromethanesulfonic acid, trifluoromethanesulfonic acid potassium, trifluoromethanesulfonic acid sodium.In a kind of embodiment of the present invention, used catalyzer is a trifluoromethanesulfonic acid sodium.
In a kind of embodiment of the present invention, catalyst consumption is the 0.1%-1%mol based on the Sulphadiazine Sodium powder, preferred 0.3%mol-0.8%mol, more preferably 0.5%-0.6%mol.
In a kind of embodiment of the present invention, temperature of reaction is preferably 48-52 ℃.
In a kind of embodiment of the present invention; After building-up reactions 30 minutes; Filter is done before the step, adopts the step of one or more middle inspections, and the step of said middle inspection is: leave standstill this synthetic liquid and sink until throw out; Whether after treating that upper solution is refrigerant, getting the upper solution check wherein has unprecipitated silver ions.
In a kind of embodiment of the present invention, the silver ions in the solution adopts chloride soln to detect.
Preferably, the silver ions in the solution adopts 10%HCl solution to detect.
Preferably, the whiz step is that centrifugal material is extremely done, and drying is 8 hours under 80-90 ℃.
Adopt compound method of the present invention, reactant is reacted with the basic mol ratio that equates, and reaction is complete basically, thereby avoided the waste and the environmental pollution that cause because of Sulphadiazine Sodium is excessive.
Embodiment
In the present invention, term " trifluoromethanesulfonic acid (salt) " is meant trifluoromethanesulfonic acid or fluoroform sulphonate.Wherein, under the situation of using salt, be preferably an alkali metal salt, for example sylvite, sodium salt, lithium salts, rubidium salt.Consider from the cost angle, be preferably sylvite and sodium salt.
In the present invention, earlier Sulphadiazine Sodium is converted into sodium salt or sylvite, and then in the presence of catalyzer, reacts with Silver Nitrate; When Sulphadiazine Sodium is converted to sodium salt; Preferred use sodium salt catalyzer, and when Sulphadiazine Sodium is converted to sylvite, preferably use the sylvite catalyzer.But, for above-mentioned any situation, all can use trifluoromethanesulfonic acid, because it can be converted into corresponding salt under reaction conditions.
Employed Sulphadiazine Sodium powder among the present invention: healthy pharmaceutcal corporation, Ltd provides by Shandong.
Employed Silver Nitrate among the present invention: ltd provides by Beijing chemical industry technology.
Sodium hydroxide used in the present invention: ltd provides by Beijing chemical industry technology.
Purified water: utilize the CS-industry flushing high purity water equipment of making by Suzhou City's innovation atmosphere water treatment ltd to produce.
Use trifluoromethanesulfonic acid sodium to be based on following principle as catalyzer among the present invention: the reversibility of sulfonation reaction is very useful in the organic synthesis field, and easy combine and this associative key is also opened easily between trifluoromethanesulfonic acid sodium and the Sulphadiazine Sodium powder be described; In reaction process of the present invention; Nucleophilic substitution takes place in the nitrogen at trifluoromethane sulfonic acid root negative ion attack Sulphadiazine Sodium molecule middle part, because this trifluoromethanesulfonic acid negative ion is left away easily; The carrying out of be beneficial to and the reaction of sodium hydroxide is beneficial to the carrying out of this building-up process thus.
Reach following examples below with reference to accompanying drawings and describe the present invention, but this embodiment is merely illustration purpose, and should not be construed as restriction the present invention.
Embodiment 1
Step 1: the preparation of silver nitrate solution
In dissolving vessel, 16.4kg (96 moles) Silver Nitrate is dissolved in the 135kg purified water, open steam valve; Silver nitrate solution is heated to 80 ℃; Be 30min heat-up time, and vapor pressure is controlled in the 0.2Mpa, closes cap relief valve after dissolving fully for silver nitrate solution; Filter, the Silver Nitrate after will filtering is then filtrated subsequent use among the header tank I that squeezes into synthesis tank.
Step 2: the preparation of Sulphadiazine Sodium sodium solution
3.85kg (96 moles) sodium hydroxide is added the 200kg purified water in dissolving vessel, make it fully be dissolved into sodium hydroxide solution; 24.0kg (96 moles) Sulphadiazine Sodium powder is added in the above-mentioned sodium hydroxide solution; Add trifluoromethanesulfonic acid sodium simultaneously, its consumption is 0.1%mol based on the consumption of Sulphadiazine Sodium powder, fully stirs; Be heated to 80 ℃; Be 30min heat-up time, and until Sulphadiazine Sodium powder dissolving position, the pH value of the Sulphadiazine Sodium sodium solution that generate this moment is 6.8-7.5; The Sulphadiazine Sodium sodium solution that filtered while hot generates is squeezed into filtrating among the header tank II of synthesis tank subsequent use.
Step 3: synthetic
Silver nitrate solution and Sulphadiazine Sodium solution sodium solution are put into to synthesis tank through the transfer lime of header tank I and II respectively simultaneously; The stirring of filtrating limit is put on the limit; Until two kinds of filtratings all mix and composition deposition till (generated time is 30min), temperature of reaction is 45 ℃.At this moment, measure with the precision test paper of 5.5-9.0, the pH value is 7.0 to 7.5; Leave standstill to the throw out sinking, after upper solution is limpid, get whether inspection also has unprecipitated silver ions in the upper solution; After middle inspection was qualified, it was dried to utilize drainer to filter, and filtrating enters floor drain.
The mensuration of silver ions in the solution: get upper solution 10ml with the filter paper filtering after, place tube comparison tubes, add 1ml 10%HCl, solution does not have the milkiness phenomenon then to be explained and not to have silver ions.
Step 4: wash centrifugal
The Sulfadiazine Silver of filtering after doing is added purified water, clean repeatedly three times.Afterwards, Sulfadiazine Silver is put into whizzer dewater, dry the back and dry (each centrifugation time is 20 minutes) for three times again with pure water drip washing.
Step 5: drying
It is dry that Sulfadiazine Silver after centrifugal is put into the thermal cycling baking oven, and drying temperature is 80-90 ℃, 8 hours time.
Embodiment 2
According to preparing Sulfadiazine Silver with embodiment 1 identical mode, the consumption of the trifluoromethanesulfonic acid sodium that just in the step of producing Suthogen, uses is the consumption 0.3%mol of Sulphadiazine Sodium powder, and the temperature of reaction in synthesis step is 55 ℃.
Embodiment 3
According to preparing Sulfadiazine Silver with embodiment 1 identical mode, the consumption of the trifluoromethanesulfonic acid sodium that just in the step of producing Suthogen, uses is the consumption 0.5%mol of Sulphadiazine Sodium powder, and the temperature of reaction in synthesis step is 49 ℃.
Embodiment 4
According to preparing Sulfadiazine Silver with embodiment 1 identical mode, the consumption of the trifluoromethanesulfonic acid sodium that just in the step of producing Suthogen, uses is the consumption 0.8%mol of Sulphadiazine Sodium powder, and the temperature of reaction in synthesis step is 52 ℃.
Embodiment 5
According to preparing Sulfadiazine Silver with embodiment 1 identical mode, the consumption of the trifluoromethanesulfonic acid sodium that just in the step of producing Suthogen, uses is the consumption 0.6%mol of Sulphadiazine Sodium powder, and the temperature of reaction in synthesis step is 49 ℃.
Embodiment 6
According to preparing Sulfadiazine Silver with embodiment 1 identical mode, the consumption of the trifluoromethanesulfonic acid sodium that just in the step of producing Suthogen, uses is the consumption 1%mol of Sulphadiazine Sodium powder, and the temperature of reaction in synthesis step is 45 ℃.
Comparative example 1
According to preparing Sulfadiazine Silver, just in the step of producing Suthogen, do not use catalyzer, and the temperature of reaction in synthesis step is 25 ℃ of normal temperature with embodiment 1 identical mode.
Comparative example 2
According to preparing Sulfadiazine Silver with embodiment 1 identical mode, just the consumption of Silver Nitrate is 15kg, and the usage quantity of sodium hydroxide is 3.75kg, and in the step of producing Suthogen, does not use catalyzer, and the temperature of reaction in synthesis step is 25 ℃ of normal temperature.
Evaluation of result
Product to gained carries out the test of pH value and detects its purity and productive rate, and the result lists in the table 1.Wherein:
The pH meter that uses is acidometer (model: PHS-4cT is available from Shanghai precision instrumentation ltd);
Purity testing: 2005 editions three ones (appendix IVA) measure according to Chinese Pharmacopoeia;
Wherein, the productive rate of product is to calculate with respect to the consumption of Sulphadiazine Sodium powder.
Table 1
Figure G2009101621018D00071
Conclusion: under suitable temperature, can prepare the higher product of purity, under 48 to 52 ℃ of preferred temperature, can make product gas purity reach 98.5 to 98.8%; Productive rate can reach more than 97.3%; That is, productive rate has nearly improved 10%, not only is very beneficial for medicinal use; And practiced thrift cost, have more economic benefit.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1. a synthetic drug is characterized in that with the method for Sulfadiazine Silver, in the presence of trifluoromethanesulfonic acid or fluoroform sulphonate as catalyzer, make silver nitrate solution and Sulphadiazine Sodium sodium solution with etc. mol ratio react 45-55 ℃ temperature.
2. method according to claim 1, wherein, said trifluoromethanesulfonic acid or fluoroform sulphonate are trifluoromethanesulfonic acid sodium or trifluoromethanesulfonic acid.
3. method according to claim 1, wherein, said Suthogen is transformed and is got by the Sulphadiazine Sodium powder, and said catalyst consumption is the 0.1%-1%mol of said Sulphadiazine Sodium powder.
4. method according to claim 3, wherein, said catalyst consumption is the 0.3%-0.8%mol of Sulphadiazine Sodium powder.
5. method according to claim 4, wherein, said catalyst consumption is the 0.5%-0.6%mol of Sulphadiazine Sodium powder.
6. synthetic drug according to claim 1 is with the method for Sulfadiazine Silver, and wherein, temperature of reaction is 48-52 ℃.
7. method according to claim 1, wherein, said method comprises the dried step of filter; Wherein, after building-up reactions 30 minutes, filter is done before the step; Adopt the step of one or more middle inspections; The step of inspection is in said: leave standstill this synthetic liquid and sink until throw out, treat that upper solution is refrigerant after, whether get upper solution check wherein has unprecipitated silver ions.
8. method according to claim 7, wherein, the silver ions in the solution adopts chloride soln to detect.
9. method according to claim 8, wherein, the silver ions in the solution adopts 10%HCl solution to detect.
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Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
李海鹏 等.磺胺嘧啶在室温固相中的成盐和配位反应.《暨南大学学报(自然科学版)》.1996,第17卷(第3期),第70-74页. *
腊蕾 等.微乳液反应法制备磺胺嘧啶银均匀微晶及其最佳处方评价.《广东药学院学报》.2001,第17卷(第3期),第173-174,177页. *

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