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CN102241594A - Adamantanamine synthesis method through adamantanol aminolysis - Google Patents

Adamantanamine synthesis method through adamantanol aminolysis Download PDF

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CN102241594A
CN102241594A CN2010101719945A CN201010171994A CN102241594A CN 102241594 A CN102241594 A CN 102241594A CN 2010101719945 A CN2010101719945 A CN 2010101719945A CN 201010171994 A CN201010171994 A CN 201010171994A CN 102241594 A CN102241594 A CN 102241594A
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adamantanol
amantadine
aminolysis
reaction
synthesizing
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罗军
李娅琼
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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Abstract

The invention discloses a low-cost and environment-friendly adamantanamine synthesis method through an adamantanol aminolysis. According to the invention, first adamantine is oxidized with oxygen under catalysis of NHPI and Co(OAc)2 to obtain adamantanol; then the adamantanol is aminated with urea under a high temperature to obtain an object product adamantanamine. The method is easy for operation and with low costs, can substantially reduce environmental pollution, and has good application prospects.

Description

The method of adamantanol aminolysis synthesizing amantadine
Technical field
The present invention relates to a kind of green synthesis method of amantadine, specifically a kind of method through adamantanol amination reaction synthesizing amantadine.
Background technology
Amantadine is the aminoderivative of the saturated tricyclic decane of synthetic, is antiviral, can stop influenza A virus to penetrate host cell and the effect of prophylaxis of viral infections is arranged, and also can suppress uncoating and suppresses virus multiplication.Find that by clinical practice amantadine treatment parkinsonism has better effects, and various Parkinsonism symptom is also had mitigation, discovered in recent years also has better effects to the treatment of chronic hepatitis C.
According to the literature, amantadine has multiple synthetic method at present, as (JAm Chem Soc, 1969,91 (23): 6457-6460) with the methylene dichloride be solvent, use NCl such as Kovacic 3-AlCl 3Make amantadine with the diamantane reaction, productive rate 87%, but this reaction process is comparatively complicated, and the temperature control that different steps requires is different, operates more loaded down with trivial details; Jirgensons etc. (Synthesis, 2000, be substrate 12:1709-1712), with ClCH with the 1-adamantanol 2Make the 1-adamantanamine hydrochloride with the thiocarbamide reaction again after the CN reaction, but used ClCH in this reaction 2CN strong toxicity, price height do not possess using value yet.
Existing industrial process is to replace by excessive bromine and diamantane generation bromine to generate 1-bromine diamantane, at high temperature reacts with urea to prepare amantadine again.The bromine price is more expensive, and corrodibility is strong and be difficult to reclaim, and environmental pollution is serious, therefore finds more to save cost more operation readiness and the eco-friendly mode of production are very necessary.
Summary of the invention
The object of the present invention is to provide a kind of reducing cost, reduce the method for the green synthesizing amantadine that pollutes.
The technical solution that realizes the object of the invention is: a kind of method of adamantanol aminolysis synthesizing amantadine, and step is as follows:
Step 1, diamantane oxidation: raw material diamantane and oxygen are at NHPI, Co (OAc) 2Carrying out oxidizing reaction under the catalytic condition, is mixed solvent with acetate, ethyl acetate, and reaction is revolved steaming after finishing, and revolves to steam to remove ethyl acetate, adds water again white solid product is separated out, and filtration, washing obtain the product adamantanol;
Step 2, amination reaction: pyroreaction in high boiling solvent with adamantanol and urea, reaction finishes the back and drips concentrated hydrochloric acid, filter the amantadine hydrochloric acid soln, drip the alkaline solution neutralization and obtain the flocks of amantadine white, filter, dry the pure product of amantadine.
The present invention compared with prior art, its remarkable advantage: this preparation method's environmental protection, simple to operate, raw material is cheap and easy to get.As: the production method of traditional amantadine is diamantane and liquid bromine generation bromo-reaction, carry out amination reaction with urea again, wherein liquid bromine price is more expensive, and equipment is had very strong corrodibility, also very serious to atmospheric pollution, also can cause very big injury to experiment operator; The synthetic method of other of amantadine has much all been used severe toxicity or expensive reagent, is not suitable for industrial production; And the present invention uses dioxygen oxidation earlier, carries out amination reaction with urea again, and raw material is cheap and easy to get, and total synthetic cost is very low, wherein with oxygen as oxygenant, environmental protection, pollution-free, equipment is not had corrosion, easy and simple to handle, have a good application prospect.
Embodiment
The method of a kind of adamantanol aminolysis of the present invention synthesizing amantadine, step is as follows:
Step 1, diamantane oxidation: raw material diamantane and oxygen are at NHPI, Co (OAc) 2Carrying out oxidizing reaction under the catalytic condition, is mixed solvent with acetate, ethyl acetate, and reaction is revolved steaming after finishing, and revolves to steam to remove ethyl acetate, adds water again white solid product is separated out, and filtration, washing obtain the product adamantanol;
Step 2, amination reaction: pyroreaction in high boiling solvent with adamantanol and urea, reaction finishes the back and drips concentrated hydrochloric acid, filter the amantadine hydrochloric acid soln, drip the alkaline solution neutralization and obtain the flocks of amantadine white, filter, dry the pure product of amantadine.
In the step 1 of the present invention, oxidizing reaction temperature is 60~110 ℃, and more excellent temperature of reaction is 70~80 ℃, and the reaction times is 1~6h, and the more excellent reaction times is 5h, and acetate and ethyl acetate volume ratio are 5: 1~1: 1; More excellent volume ratio is 5: 3.
Adamantanol and urea mol ratio are greater than 1: 10 in the step 2, and the high boiling solvent that uses is DMF, DMA or DMSO equal solvent; Temperature of reaction is controlled at 145~195 ℃, and more excellent temperature of reaction is 170~180 ℃; Reaction times is 10~60min, and the more excellent reaction times is 20~30min; The concentration of hydrochloric acid solution that drips is 5~38%; The alkali that drips is strong caustic, also available hydrogen potassium oxide, and volumetric molar concentration is 1~20mol/L, with saturated sodium hydroxide solution optimum.
The invention will be further described below in conjunction with embodiment.
Embodiment 1:
Oxidizing reaction: in the 150mL flask, add the 6.8g diamantane, 1.63g NHPI, 0.2g cobaltous acetate (II), solvent acetic acid: 50mL, ethyl acetate: 30mL 80 ℃ of reactions down, uses the conduit aerating oxygen, reaction 5h.Reaction spins off partial solvent after finishing, and adds water, and then the adularescent solid is separated out, and suction filtration, solid washing then obtain the product adamantanol;
Interpretation of result calculates:
Diamantane transformation efficiency: 98%
Adamantanol productive rate: 90%
Amination reaction: get in two mouthfuls of flasks of 10g adamantanol, 50g urea adding 250mL, add 20mL DMF, be heated to 175 ℃, reaction 30min.After reaction finishes, drip concentrated hydrochloric acid, filtration, the neutralization of dropping sodium saturated solution obtain product amantadine 7.9g.
Interpretation of result calculates:
Adamantanol transformation efficiency: 82%
Amantadine productive rate: 79%
Embodiment 2-5:
Change oxidizing reaction temperature, other operational condition and step are with embodiment 1, and the adamantanol productive rate is as shown in table 1.
Table 1 temperature is to the influence of reaction
Figure GSA00000118137400031
Implement 6-8:
Change the oxidation solvent volume ratio, other operational condition and step are with embodiment 1, and the productive rate of adamantanol is as shown in table 2.
The influence of table 2 solvent volume comparison reaction
Figure GSA00000118137400032
Embodiment 9-12:
Change oxidation time, other operational condition and step are with embodiment 1, and the adamantanol productive rate is as shown in table 3.
Table 3 reaction times is to the influence of productive rate
Figure GSA00000118137400041
Embodiment 13-15:
Change the amination reaction temperature, other operational condition and step are with embodiment 1, and productive rate is as shown in table 4.
Table 4 temperature is to the influence of productive rate
Figure GSA00000118137400042
Embodiment 16-18:
Change the amination reaction time, other operational condition and step are with embodiment 1, and productive rate is as shown in the table.
Table 5 time is to the influence of productive rate
Figure GSA00000118137400043
Embodiment 19:
The solvent that does not add amination reaction, other operational condition and step are with embodiment 1.
Interpretation of result calculates:
Adamantanol transformation efficiency: 60%
Amantadine productive rate: 55%
Embodiment 20:
Dripping hydrochloric acid concentration is 5% when changing the amination reaction aftertreatment, and other operational condition and step be with embodiment 1, amantadine productive rate 50%.
Embodiment 21:
Dropping sodium concentration is 1mol/L when changing aftertreatment, and other operational condition and step be with embodiment 1, amantadine productive rate 48%.

Claims (10)

1.一种金刚烷醇胺解合成金刚烷胺的方法,其特征在于包括如下步骤:1. a method for adamantanol aminolysis synthetic amantadine, is characterized in that comprising the steps: 步骤1、金刚烷氧化:原料金刚烷与氧气在NHPI、Co(OAc)2催化条件下进行氧化反应,以乙酸、乙酸乙酯为混合溶剂,反应结束后旋蒸,旋蒸除去乙酸乙酯,再加水使白色固体产物析出,过滤、水洗得到产物金刚烷醇;Step 1, adamantane oxidation: the raw material adamantane and oxygen are oxidized under NHPI and Co(OAc) 2 catalytic conditions, using acetic acid and ethyl acetate as a mixed solvent, and after the reaction is completed, the rotary steaming is used to remove the ethyl acetate. Add water to precipitate the white solid product, filter and wash with water to obtain the product adamantanol; 步骤2、胺化反应:将金刚烷醇与尿素在高沸点溶剂中高温反应,反应结束后滴加浓盐酸,过滤得金刚烷胺盐酸溶液,滴加碱溶液中和得到金刚烷胺白色絮状沉淀,过滤、干燥得金刚烷胺纯品。Step 2, amination reaction: react adamantanol and urea in a high-boiling solvent at high temperature, add concentrated hydrochloric acid dropwise after the reaction, filter to obtain amantadine hydrochloric acid solution, add dropwise alkali solution to neutralize and obtain amantadine white flocculent Precipitate, filter and dry to obtain pure amantadine. 2.根据权利要求1所述的金刚烷醇胺解合成金刚烷胺的方法,其特征在于:步骤1中氧化反应温度为60~110℃。2. The method for synthesizing amantadine through aminolysis of adamantanol according to claim 1, characterized in that the oxidation reaction temperature in step 1 is 60-110°C. 3.根据权利要求1所述的金刚烷醇胺解合成金刚烷胺的方法,其特征在于:步骤1中混合溶剂乙酸与乙酸乙酯的体积比为5∶5~5∶1。3. The method for synthesizing amantadine by aminolysis of adamantanol according to claim 1, characterized in that: in step 1, the volume ratio of the mixed solvent acetic acid and ethyl acetate is 5:5 to 5:1. 4.根据权利要求1所述的金刚烷醇胺解合成金刚烷胺的方法,其特征在于:步骤1中氧化反应时间为1~6h。4. The method for synthesizing amantadine through aminolysis of adamantanol according to claim 1, characterized in that: the oxidation reaction time in step 1 is 1-6 h. 5.根据权利要求1所述的金刚烷醇胺解合成金刚烷胺的方法,其特征在于:步骤2中金刚烷醇与尿素的摩尔比为大于1∶10。5. The method for adamantanol aminolysis synthesis of amantadine according to claim 1, characterized in that: in step 2, the molar ratio of adamantanol to urea is greater than 1:10. 6.根据权利要求1所述的金刚烷醇胺解合成金刚烷胺的方法,其特征在于:步骤2中反应温度为145~195℃。6. The method for synthesizing amantadine through aminolysis of adamantanol according to claim 1, characterized in that: the reaction temperature in step 2 is 145-195°C. 7.根据权利要求1所述的金刚烷醇胺解合成金刚烷胺的方法,其特征在于:步骤2中反应时间为10~60min。7. The method for synthesizing amantadine through aminolysis of adamantanol according to claim 1, characterized in that: the reaction time in step 2 is 10-60 minutes. 8.根据权利要求1所述的金刚烷醇胺解合成金刚烷胺的方法,其特征在于:步骤2中高沸点溶剂可选用DMF、DMA或DMSO溶剂。8. The method for adamantanol aminolysis synthesis of amantadine according to claim 1, characterized in that: in step 2, the high boiling point solvent can be selected from DMF, DMA or DMSO solvent. 9.根据权利要求1所述的金刚烷醇胺解合成金刚烷胺的方法,其特征在于:步骤2中滴加盐酸浓度为5~38%。9. The method for synthesizing amantadine through aminolysis of adamantanol according to claim 1, characterized in that: the concentration of hydrochloric acid added dropwise in step 2 is 5-38%. 10.根据权利要求1所述的金刚烷醇胺解合成金刚烷胺的方法,其特征在于:步骤2中滴加的碱溶液为氢氧化钠或氢氧化钾溶液,摩尔浓度为1~20mol/L。10. The method for adamantanol aminolysis synthesis of amantadine according to claim 1, characterized in that: the alkali solution added dropwise in step 2 is sodium hydroxide or potassium hydroxide solution, and the molar concentration is 1 to 20 mol/ L.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103864621A (en) * 2014-02-21 2014-06-18 南京理工大学 Energetic material 4, 4, 8, 8-tetranitroadamantane-2, 6-dinitrate and preparation method thereof
CN111960949A (en) * 2020-08-26 2020-11-20 中涛新材料有限公司 High-yield amantadine preparation method

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103864621A (en) * 2014-02-21 2014-06-18 南京理工大学 Energetic material 4, 4, 8, 8-tetranitroadamantane-2, 6-dinitrate and preparation method thereof
CN103864621B (en) * 2014-02-21 2016-03-02 南京理工大学 Energetic material 4,4,8,8-tetranitro adamantane-2,6-dinitrate and preparation method thereof
CN111960949A (en) * 2020-08-26 2020-11-20 中涛新材料有限公司 High-yield amantadine preparation method

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