CN105237411A - Preparation method for sarpogrelate hydrochloride photodegradable impurity III - Google Patents
Preparation method for sarpogrelate hydrochloride photodegradable impurity III Download PDFInfo
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- CN105237411A CN105237411A CN201510718353.XA CN201510718353A CN105237411A CN 105237411 A CN105237411 A CN 105237411A CN 201510718353 A CN201510718353 A CN 201510718353A CN 105237411 A CN105237411 A CN 105237411A
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- JNCVXMLOVMLFDV-UHFFFAOYSA-N CC(C)CC(C[U-]c1ccccc1CCc1cccc(OC)c1)[U-] Chemical compound CC(C)CC(C[U-]c1ccccc1CCc1cccc(OC)c1)[U-] JNCVXMLOVMLFDV-UHFFFAOYSA-N 0.000 description 1
- QOAPMEPOKOWXIH-UHFFFAOYSA-N CCC(CN(C)C)C[ClH]c1ccccc1CCc1cccc([U-]C)c1 Chemical compound CCC(CN(C)C)C[ClH]c1ccccc1CCc1cccc([U-]C)c1 QOAPMEPOKOWXIH-UHFFFAOYSA-N 0.000 description 1
- PGNNDVJRQSVWPM-UHFFFAOYSA-N C[U]c1cc(CCc2ccccc2[ClH]CC2OC2)ccc1 Chemical compound C[U]c1cc(CCc2ccccc2[ClH]CC2OC2)ccc1 PGNNDVJRQSVWPM-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention belongs to the field of synthesis of medicines, and specifically relates to a preparation method for a sarpogrelate hydrochloride photodegradable impurity III. The sarpogrelate hydrochloride photodegradable impurity III is prepared by comprising five-step reactions of substitution reaction, addition reaction, esterification reaction, epoxidation reaction and reduction reaction with 2-[2-(3-methoxyphenyl)vinyl]phenol as a raw material; and after column chromatography separation of a crude sarpogrelate hydrochloride photodegradable impurity III, purity reaches more than 99%. The preparation method provided by the invention has simple operation and mild reaction; the sarpogrelate hydrochloride photodegradable impurity III has high purity and can be applied in analysis of impurity profiling; and total yield is high.
Description
The application is the divisional application of application number 201410491531.5, September 23 2014 applying date, denomination of invention " preparation method of Sarpogrelatehydrochloride photodegradation impurity ".
Technical field
The invention belongs to pharmaceutical synthesis field, be specifically related to the preparation method of a kind of Sarpogrelatehydrochloride photodegradation impurity III.
Background technology
Sarpogrelate hydrochloride tablets Japanese Initial Public Offering in 1993, commodity are called Anplag, are a kind of 5-HT2 receptor-blocking agent, can suppress platelet aggregation, suppress vasoconstriction, have anti thrombotic action and improve microcirculation.Its indication is improve all symptoms of ischemia such as ulcer, pain and creeping chill that chronic arteria occlusion disease causes.Sarpogrelatehydrochloride bulk drug for the preparation of Sarpogrelate hydrochloride tablets needs to reach qualified purity, and single assorted content also will reach corresponding requirements.In the pharmaceuticals specification sheets of Japan's in March, 2012 revision, standard substance classification designation: four the photodegradation impurity describing Sarpogrelatehydrochloride in 873399 in detail, its structural formula is as follows:
At present, preparation method for Sarpogrelatehydrochloride photodegradation impurity does not also have document and patent report, in order to better carry out quality approach to Sarpogrelatehydrochloride bulk drug, guarantee quality product, the photodegradation impurity of the present inventor to Sarpogrelatehydrochloride has carried out chemosynthesis research, obtain a kind of preparation method of high purity photodegradation impurity, for the quality improving Sarpogrelatehydrochloride bulk drug is given security.
Summary of the invention
The object of this invention is to provide that a kind of yield is high, the preparation method of the Sarpogrelatehydrochloride impurity III of environmental friendliness, easy handling, for the quality improving Sarpogrelatehydrochloride bulk drug is given security.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
The preparation method of Sarpogrelatehydrochloride photodegradation impurity of the present invention, comprises the preparation of impurity II, impurity III, impurity IV, and impurity II, impurity III, impurity IV are according to following preparation:
(1) preparation of Sarpogrelatehydrochloride degradation impurity II is that raw material obtains through following steps successively with salicylic aldehyde:
(1) substitution reaction:
Salicylic aldehyde, epoxy chloropropane, alkali are dissolved in solvent, are heated to backflow, back flow reaction 5 ~ 20 hours, obtain product 2-(2-oxygen methyl oxirane) phenyl aldehyde through aftertreatment; Structural formula is shown in Formula Il-2;
The mol ratio of described salicylic aldehyde and epoxy chloropropane is 1:1 ~ 10;
Described solvent is tetrahydrofuran (THF), acetone, tetracol phenixin or acetonitrile; Preferred tetrahydrofuran (THF);
Described alkali is salt of wormwood, potassium hydroxide, sodium hydroxide or potassium hydride KH; Preferred salt of wormwood;
The mol ratio of described salicylic aldehyde and alkali is 1:0.5 ~ 5;
(2) addition reaction:
Compound 2-(2-oxygen methyl oxirane) phenyl aldehyde is dissolved in solvent, be cooled to-15 ~ 20 DEG C, add the dimethylamine agueous solution of 40%, finish, room temperature reaction 2 ~ 10 hours, aftertreatment obtains 2-[2-(dimethylin)-1-hydroxy ethoxy] phenyl aldehyde; Structural formula is shown in Formula Il-3;
The mol ratio of described 2-(2-oxygen methyl oxirane) phenyl aldehyde and dimethylamine is 1:1 ~ 10;
Described solvent is tetrahydrofuran (THF) or acetonitrile; Preferred tetrahydrofuran (THF);
(3) ester reaction is become:
Be dissolved in solvent by compound 2-[2-(dimethylin)-1-hydroxy ethoxy] phenyl aldehyde, nitrogen protection, adds Succinic anhydried, is warming up to backflow, back flow reaction 5 ~ 20 hours, and aftertreatment obtains impurity II;
Mol ratio 1:1 ~ 5 of described 2-[2-(dimethylin)-1-hydroxy ethoxy] phenyl aldehyde and Succinic anhydried;
Described solvent is tetrahydrofuran (THF), acetonitrile or tetracol phenixin; Preferred tetrahydrofuran (THF);
(2) preparation of Sarpogrelatehydrochloride degradation impurity III, comprises the steps:
(1) substitution reaction:
2-[2-(3-anisole) ethene] phenol, epoxy chloropropane, alkali are dissolved in solvent, be heated to backflow, back flow reaction 5 ~ 20 hours, obtains product [[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] oxyethane through aftertreatment; Structural formula is shown in Formula Il I-2;
The mol ratio of described 2-[2-(3-anisole) ethene] phenol and epoxy chloropropane is 1:1 ~ 10;
Described solvent is tetrahydrofuran (THF), acetone, tetracol phenixin or acetonitrile; Preferred tetrahydrofuran (THF);
Described alkali is salt of wormwood, potassium hydroxide, sodium hydroxide or potassium hydride KH; Preferred salt of wormwood;
The mol ratio of described 2-[2-(3-anisole) ethene] phenol and alkali is 1:0.5 ~ 5;
(2) addition reaction:
Compound [[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] oxyethane is dissolved in solvent, be cooled to-15 ~ 20 DEG C, add the dimethylamine agueous solution of 40%, finish, room temperature reaction 2 ~ 10 hours, aftertreatment obtains 1-dimethylin-3-[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group]-2-propyl alcohol; Structural formula is shown in Formula Il I-3;
The mol ratio of described [[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] oxyethane and dimethylamine is 1:1 ~ 10;
Described solvent is tetrahydrofuran (THF) or acetonitrile; Preferred tetrahydrofuran (THF);
(3) ester reaction is become:
Compound 1-dimethylin-3-[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group]-2-propyl alcohol is dissolved in solvent, nitrogen protection, add Succinic anhydried, be warming up to backflow, back flow reaction 5 ~ 20 hours, aftertreatment obtains intermediate (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] ethyl succinic acid monoesters; Structural formula is shown in Formula Il I-4;
Mol ratio 1:1 ~ 5 of described 1-dimethylin-3-[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group]-2-propyl alcohol and Succinic anhydried;
Described solvent is tetrahydrofuran (THF), acetonitrile or tetracol phenixin; Preferred tetrahydrofuran (THF);
(4) oxidizing reaction:
Compound (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] ethyl succinic acid monoesters is dissolved in solvent, add oxygenant, stirring at room temperature 1 ~ 10 hour, aftertreatment obtains (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) epoxy ethyl] phenoxy group] methyl] ethyl succinic acid monoesters crude product, column chromatography for separation obtains purified product; Structural formula is shown in Formula Il I-5;
Mol ratio 1:1 ~ 5 of described (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] ethyl succinic acid monoesters and oxygenant;
Described solvent is methylene dichloride, chloroform, tetrahydrofuran (THF), acetonitrile or tetracol phenixin; Preferred methylene dichloride;
Described column chromatography eluent is the mixed solvent of methylene dichloride and methyl alcohol, and volume ratio is methylene dichloride: methyl alcohol=1 ~ 50:1;
(5) reduction reaction:
Compound (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) epoxy ethyl] phenoxy group] methyl] ethyl succinic acid monoesters is dissolved in solvent, add reductive agent, stirring at room temperature 5 ~ 20 hours, aftertreatment obtains impurity III; Structural formula is shown in Formula Il I;
The consumption of described reductive agent is 1% ~ 20% of (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) epoxy ethyl] phenoxy group] methyl] ethyl succinic acid monoesters quality;
Described solvent is methyl alcohol, ethyl acetate, tetrahydrofuran (THF), methylene dichloride, chloroform or tetracol phenixin; Particular methanol or tetrahydrofuran (THF);
(3) preparation of Sarpogrelatehydrochloride degradation impurity IV, comprises the steps:
(1) addition reaction:
Compound [[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group] methyl] oxyethane is dissolved in solvent, be cooled to-15 ~ 20 DEG C, add the aqueous methylamine solution of 40%, finish, room temperature reaction 2 ~ 10 hours, aftertreatment obtains 1-methylamino-3-[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group]-2-propyl alcohol; Structural formula is shown in following formula I V-2;
The mol ratio of described [[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group] methyl] oxyethane and methylamine is 1:1 ~ 10;
Described solvent is tetrahydrofuran (THF) or acetonitrile; Preferred tetrahydrofuran (THF);
(2) amido protection:
Compound 1-methylamino-3-[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group]-2-propyl alcohol is dissolved in solvent, add Boc acid anhydrides, acid binding agent, normal-temperature reaction 2 ~ 10 hours, aftertreatment obtains 1-(tert-Butoxycarbonylmethyl amido)-3-[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group]-2-propyl alcohol; Structural formula is shown in following formula I V-3;
The mol ratio of described 1-methylamino-3-[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group]-2-propyl alcohol and Boc acid anhydrides is 1:1 ~ 2;
Described solvent is methylene dichloride, chloroform, acetonitrile or tetracol phenixin;
The mol ratio of described acid binding agent and Boc acid anhydrides is 1 ~ 5:1;
(3) ester reaction is become:
Compound 1-(tert-Butoxycarbonylmethyl amido)-3-[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group]-2-propyl alcohol is dissolved in solvent, nitrogen protection, add Succinic anhydried, be warming up to backflow, back flow reaction 5 ~ 20 hours, aftertreatment obtains intermediate (+/-)-2-(tert-Butoxycarbonylmethyl amido)-1-[[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group] methyl] ethyl succinic acid monoesters; Structural formula is shown in following formula I V-4;
Mol ratio 1:1 ~ 5 of described 1-(tert-Butoxycarbonylmethyl amido)-3-[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group]-2-propyl alcohol and Succinic anhydried;
Described solvent is tetrahydrofuran (THF), acetonitrile or tetracol phenixin; Preferred tetrahydrofuran (THF);
(4) protection is gone:
Compound (+/-)-2-(tert-Butoxycarbonylmethyl amido)-1-[[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group] methyl] ethyl succinic acid monoesters is dissolved in solvent, add acid, normal-temperature reaction 1 ~ 10 hour, aftertreatment obtains impurity IV; Structural formula is shown in following formula I V;
The mol ratio of described (+/-)-2-(tert-Butoxycarbonylmethyl amido)-1-[[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group] methyl] ethyl succinic acid monoesters and acid is 1:1 ~ 10;
Described solvent is methylene dichloride, acetonitrile, chloroform, tetracol phenixin or tetrahydrofuran (THF); Preferred methylene dichloride;
Wherein,
The aftertreatment described in step (2) in step (1) in step (1) in Sarpogrelatehydrochloride degradation impurity (II) preparation, Sarpogrelatehydrochloride degradation impurity (III) preparation, step (3), Sarpogrelatehydrochloride degradation impurity (IV) preparation is all carried out according to following:
Suction filtration removes insoluble impurities, then steams the organic solvent except filtrate, and the crude product obtained directly carries out next step reaction, without the need to being further purified.
Step (2) in step (2) in Sarpogrelatehydrochloride degradation impurity (II) preparation, Sarpogrelatehydrochloride degradation impurity (III) preparation, the aftertreatment described in step (1) in Sarpogrelatehydrochloride degradation impurity (IV) preparation are all carried out according to following:
First steam and desolventize, add water, hydrochloric acid regulates PH to clarification, organic solvent extraction, water intaking phase, the sodium hydroxide solution of 50wt.% is adjusted to PH=9 ~ 10, and organic solvent extraction gets organic phase, steam except this organic solvent again, obtain crude intermediate, directly carry out next step reaction.
Step (3) in step (4) in step (3) in Sarpogrelatehydrochloride degradation impurity (II) preparation, Sarpogrelatehydrochloride degradation impurity (III) preparation, step (5), Sarpogrelatehydrochloride degradation impurity (IV) preparation, the aftertreatment described in step (4) are all carried out according to following:
First steam and desolventize, purify and adopt silica gel column chromatography, elutriant adopts the mixing solutions of methylene dichloride and methyl alcohol, and the volume ratio of methylene dichloride and methyl alcohol is 1 ~ 50:1 ~ 20.
Oxygenant in step (4) in Sarpogrelatehydrochloride degradation impurity (III) preparation is metachloroperbenzoic acid, hydrogen peroxide, Peracetic Acid, benzoyl hydroperoxide, alkyl hydroperoxide or tertbutyl peroxide, preferred metachloroperbenzoic acid or hydrogen peroxide.
Reductive agent in step (5) in Sarpogrelatehydrochloride degradation impurity (III) preparation is lithium aluminum hydride, sodium borohydride or palladium carbon, preferred palladium carbon.
Acid binding agent in step (2) in Sarpogrelatehydrochloride degradation impurity (IV) preparation is triethylamine or diethylamine, preferred triethylamine; Acid in step (4) is hydrochloric acid, trifluoroacetic acid, formic acid, sulfuric acid or phosphoric acid, preferred hydrochloric acid or trifluoroacetic acid.
Beneficial effect of the present invention is as follows:
Preparation method of the present invention, simple to operate, reaction temperature and, yield is higher, and product purity is high, and be applicable to bulk drug impurity spectrum analysis, total recovery is higher, has good commercial value.
Embodiment
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
Salicylic aldehyde (10.0g, 82mmol) joins in 250ml reaction flask, adds 100ml tetrahydrofuran (THF), adds epoxy chloropropane (9.1g, 98mmol) and 10g salt of wormwood, nitrogen protection, temperature rising reflux, reaction 12h.TLC detects raw material and has reacted complete (sherwood oil: ethyl acetate=4:1v/v), product 2-(2-oxygen methyl oxirane) phenyl aldehyde II-2 is obtained through aftertreatment, aftertreatment: suction filtration removing salt of wormwood, filtrate decompression distillation and concentration obtains compound 2-(2-oxygen methyl oxirane) phenyl aldehyde II-2,10.39g, productive rate 71.2%.
Embodiment 2
Salicylic aldehyde (10.0g, 82mmol) joins in 250ml reaction flask, adds 100ml tetrahydrofuran (THF), adds epoxy chloropropane (9.1g, 98mmol) and 5g potassium hydroxide, nitrogen protection, temperature rising reflux, reaction 15h.TLC detects raw material and has reacted complete (sherwood oil: ethyl acetate=4:1v/v), product 2-(2-oxygen methyl oxirane) phenyl aldehyde II-2 is obtained through aftertreatment, aftertreatment: suction filtration removing salt of wormwood, filtrate decompression distillation and concentration obtains compound 2-(2-oxygen methyl oxirane) phenyl aldehyde II-2,8.76g, productive rate 60.0%.
Embodiment 3
Compound 2-(2-oxygen methyl oxirane) phenyl aldehyde (10.0g, 60mmol) be dissolved in 100ml tetrahydrofuran (THF), be cooled to 0 DEG C, add the dimethylamine agueous solution 10g of 40%, finish room temperature reaction 4h, TLC follows the tracks of (sherwood oil: ethyl acetate=4:1v/v).Concentrate after completion of the reaction, be extracted with ethyl acetate (100*3ml), organic phase anhydrous sodium sulfate drying, concentrate and obtain 2-[2-(dimethylin)-1-hydroxy ethoxy] phenyl aldehyde II-3,11.22g, productive rate 89.6%.
Embodiment 4
Compound 2-[2-(dimethylin)-1-hydroxy ethoxy] phenyl aldehyde (11g, 50mmol) is dissolved in 100ml tetrahydrofuran (THF), and nitrogen protection, adds Succinic anhydried (5.96g, 60mmol), reaction temperature rising reflux 12h.TLC follows the tracks of (methylene dichloride: methyl alcohol=1:1v/v).React complete, underpressure distillation desolventizes, and obtains crude product impurity II.Column chromatography for separation (methylene dichloride: methyl alcohol=5:1) obtains impurity II sterling 12.4g, productive rate 77.8%.
Sarpogrelatehydrochloride impurity II nuclear magnetic spectrogram is:
1hNMR (DMSO-d
6, 600MHz), δ 2.23 (6H, s, CH
3), δ 2.49-2.51 (4H, m, CH
2cH
2), δ 2.60 (2H, m, CH
2), δ 4.24-4.32 (2H, dd, CH
2), δ 5.33 (1H, m, CH), δ 7.10 (1H, t, ph), δ 7.23 (1H, d, ph), δ 7.65 (1H, dt, ph), δ 7.70 (1H, dd, ph), δ 10.33 (1H, s, CHO).
Sarpogrelatehydrochloride impurity II mass spectrum is: M/Z=324.14.
Embodiment 5
2-[2-(3-anisole) ethene] phenol (10.0g, 44mmol) joins in 250ml reaction flask, adds 100ml acetonitrile, add epoxy chloropropane (4.9g, 53mmol), 7.4g salt of wormwood, temperature rising reflux, reaction 5h.TLC detection reaction complete (sherwood oil: ethyl acetate=2:1v/v).Suction filtration removing salt of wormwood, filtrate decompression distillation and concentration obtains compound [[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] oxyethane, 9.8g, productive rate 78.5%.
Embodiment 6
Compound [[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] oxyethane (9.0g, 35mmol) be dissolved in 150ml tetrahydrofuran (THF), add the dimethylamine agueous solution 15ml of 40%, finish room temperature reaction 5h, TLC follows the tracks of (sherwood oil: ethyl acetate=2:1v/v; Methylene dichloride: methyl alcohol=10:1v/v).React complete, tetrahydrofuran (THF) is removed in distillation, pour in 500ml water, be extracted with ethyl acetate (200ml*2), organic phase anhydrous sodium sulfate drying, concentrate and obtain 1-dimethylin-3-[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group]-2-propyl alcohol 7.5g, productive rate 71.9%.
Embodiment 7
Compound 1-dimethylin-3-[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group]-2-propyl alcohol (7.5g, 23mmol) be dissolved in tetrahydrofuran (THF) (150ml), add Succinic anhydried (2.5g, 25mmol), at 60 DEG C, 7h is stirred.TLC follows the tracks of (methylene dichloride: methyl alcohol=5:1v/v), reacts completely.Underpressure distillation desolventizes and obtains oily matter (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] ethyl succinic acid monoesters, 8.1g, productive rate 82.1%.
Embodiment 8
Compound, (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] ethyl succinic acid monoesters (8.1g, 19mmol) be dissolved in 100ml methylene dichloride, add metachloroperbenzoic acid (4.0g, 85% purity, 20mmol), stirring at room temperature 4h.TLC follows the tracks of (methylene dichloride: methyl alcohol=10:1v/v), reacts completely.Underpressure distillation desolventizes, column chromatography for separation (methylene dichloride: methyl alcohol=10:1v/v), obtain (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) epoxy ethyl] phenoxy group] methyl] ethyl succinic acid monoesters, 8.2g, productive rate 95.3%.
Embodiment 9
Compound, (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] ethyl succinic acid monoesters (8.0g, 19mmol) be dissolved in 100ml acetonitrile, add hydrogen peroxide (20.0g, 35% purity, 200mmol), stirring at room temperature 7h.TLC follows the tracks of (methylene dichloride: methyl alcohol=10:1v/v), reacts completely.Underpressure distillation desolventizes, column chromatography for separation (methylene dichloride: methyl alcohol=10:1v/v), obtain (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) epoxy ethyl] phenoxy group] methyl] ethyl succinic acid monoesters, 6.3g, productive rate 75.9%.
Embodiment 10
Compound (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) epoxy ethyl] phenoxy group] methyl] ethyl succinic acid monoesters (8.0g, 18mmol) be dissolved in the mixing solutions of methyl alcohol (200ml), add Pd/C (1g, 5%), with the air in hydrogen exchange reaction flask, stirring at room temperature 8h.TLC follows the tracks of (methylene dichloride: methyl alcohol=5:1v/v), reacts completely.Filter, underpressure distillation desolventizes, and column chromatography for separation (methylene dichloride: methyl alcohol=10:1v/v), obtains III, 5.4g, productive rate 67.2%.
Embodiment 11
Compound (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) epoxy ethyl] phenoxy group] methyl] ethyl succinic acid monoesters (8.0g, 18mmol) be dissolved in the mixing solutions of tetrahydrofuran (THF) (200ml), add lithium aluminum hydride (2.7g, 0.072mmol), stirring at room temperature 3h.TLC follows the tracks of (methylene dichloride: methyl alcohol=5:1v/v), reacts completely.Filter, underpressure distillation desolventizes, and column chromatography for separation (methylene dichloride: methyl alcohol=10:1), obtains III, 2.3g, productive rate 28.6%.
Sarpogrelatehydrochloride impurity III nuclear magnetic spectrogram is:
1hNMR (DMSO-d
6, 600MHz), δ 2.22 (6H, s, CH
3), δ 2.43-2.52 (4H, m, CH
2cH
2), δ 2.60 (2H, m, CH
2), δ 2.74-2.90 (2H, m, CH
2), δ 3.72 (3H, s, CH
3), δ 4.10 (2H, m, CH
2), δ 4.78 (1H, m, CH), δ 5.26 (1H, m, CH), δ 6.76 (1H, d, ph), δ 6.82 (1H, t, ph), δ 6.87 (1H, s, ph), δ 6.92 (1H, d, ph), δ 6.93 (1H, d, ph), δ 7.07 (1H, d, ph), δ 7.15 (1H, t, ph), δ 7.19 (1H, t, ph).
Sarpogrelatehydrochloride impurity III mass spectrum is: M/Z=446.22.
Embodiment 12
Compound [[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group] methyl] oxyethane (10g, 35mmol) be dissolved in 150ml tetrahydrofuran (THF), be cooled to 0 DEG C, add the aqueous methylamine solution 15g of 40%, finish room temperature reaction 4h, TLC follows the tracks of (sherwood oil: ethyl acetate=4:1), and raw material reaction is complete, generates the product (methylene dichloride: methyl alcohol=2:1v/v) of large polarity.After concentrated, be extracted with ethyl acetate (200ml), get organic phase, add isopyknic water, regulate PH to 3-4 with hydrochloric acid, water intaking phase, then recall to pH=9 with sodium bicarbonate, add 200ml extraction into ethyl acetate, get organic phase, with anhydrous sodium sulfate drying, concentrate and obtain white solid 1-methylamino-3-[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group]-2-propyl alcohol, 9.8g, productive rate 88.4%.
Embodiment 13
Compound 1-methylamino-3-[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group]-2-propyl alcohol (9.8g; in the methylene dichloride of 31mmol) molten 100ml; add Boc acid anhydrides (7.2g; 33mmol); drip 2ml triethylamine; nitrogen protection, reacts 5h under normal temperature.TLC follows the tracks of (methylene dichloride: methyl alcohol=2:1v/v).React complete.Underpressure distillation desolventizes, and obtains crude product 1-(tert-Butoxycarbonylmethyl amido)-3-[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group]-2-propyl alcohol, 12.5g, productive rate 96.8%.
Embodiment 14
Compound 1-(tert-Butoxycarbonylmethyl amido)-3-[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group]-2-propyl alcohol (12.5g, in the tetrahydrofuran (THF) of 30mmol) molten 200ml, add Succinic anhydried (3.2g, 32mmol), back flow reaction 7h is warming up to.TLC follows the tracks of (methylene dichloride: methyl alcohol=2:1v/v).React completely.Underpressure distillation desolventizes, column chromatography for separation (methylene dichloride: methyl alcohol=5:1v/v) obtains crude product (+/-)-2-(tert-Butoxycarbonylmethyl amido)-1-[[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group] methyl] ethyl succinic acid monoesters, 9.5g, productive rate 61.1%.
Embodiment 15
Compound; (+/-)-2-(tert-Butoxycarbonylmethyl amido)-1-[[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group] methyl] ethyl succinic acid monoesters (6.5g; in the methylene dichloride of 13mmol) molten 200ml; add 10ml trifluoroacetic acid, normal-temperature reaction 1h under nitrogen protection.TLC follows the tracks of (methylene dichloride: methyl alcohol=2:1v/v).React completely complete.Underpressure distillation desolventizes, and obtains crude product.Column chromatography for separation (methylene dichloride: methyl alcohol=10:1), obtains impurity IV, 4.5g, productive rate 85.9%.
Embodiment 16
Compound, (+/-)-2-(tert-Butoxycarbonylmethyl amido)-1-[[2-[2-(3-p-methoxy-phenyl) ethyl] phenoxy group] methyl] ethyl succinic acid monoesters (6.5g, in the methylene dichloride of 13mmol) molten 200ml, add 20ml hydrochloric acid (2N).TLC follows the tracks of (methylene dichloride: methyl alcohol=2:1v/v).React completely complete.Regulate PH=9 ~ 10, extraction into ethyl acetate, underpressure distillation desolventizes, and obtains crude product.Column chromatography for separation (methylene dichloride: methyl alcohol=10:1v/v), obtains impurity IV, 3.1g, productive rate 59.2%.
Sarpogrelatehydrochloride impurity IV nuclear magnetic spectrogram is:
1hNMR (DMSO-d
6, 600MHz), δ 2.65 (3H, s, CH
3), δ 2.51-2.67 (4H, m, CH
2cH
2), δ 2.80 (2H, m, CH
2), δ 2.82 (2H, m, CH
2), δ 3.39 (2H, brs, CH
2), δ 3.73 (3H, s, CH
3), δ 4.12 (2H, m, CH
2), δ 5.49 (1H, m, CH), δ 6.75 (1H, dd, ph), δ 6.79 (1H, s, ph), δ 6.82 (1H, d, ph), δ 6.88 (1H, t, ph), δ 6.95 (1H, d, ph), δ 7.14 (1H, d, ph), δ 7.18 (1H, t, ph), δ 7.19 (1H, t, ph), δ 9.06 (1H, brd, NH), δ 12.41 (1H, brs, COOH).
Sarpogrelatehydrochloride impurity IV mass spectrum is: M/Z=416.21.
Claims (10)
1. a preparation method of Sarpogrelatehydrochloride photodegradation impurity III, is characterized in that: comprise the steps:
(1) substitution reaction:
2-[2-(3-anisole) ethene] phenol, epoxy chloropropane, alkali are dissolved in solvent, be heated to backflow, back flow reaction 5 ~ 20 hours, obtains product [[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] oxyethane through aftertreatment;
(2) addition reaction:
Compound [[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] oxyethane is dissolved in solvent, be cooled to-15 ~ 20 DEG C, add the dimethylamine agueous solution of 40%, finish, room temperature reaction 2 ~ 10 hours, aftertreatment obtains 1-dimethylin-3-[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group]-2-propyl alcohol;
(3) ester reaction is become:
Compound 1-dimethylin-3-[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group]-2-propyl alcohol is dissolved in solvent, nitrogen protection, add Succinic anhydried, be warming up to backflow, back flow reaction 5 ~ 20 hours, aftertreatment obtains intermediate (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] ethyl succinic acid monoesters;
(4) oxidizing reaction:
Compound (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] ethyl succinic acid monoesters is dissolved in solvent, add oxygenant, stirring at room temperature 1 ~ 10 hour, aftertreatment obtains (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) epoxy ethyl] phenoxy group] methyl] ethyl succinic acid monoesters crude product, column chromatography for separation obtains purified product;
Described oxygenant is metachloroperbenzoic acid, hydrogen peroxide, Peracetic Acid, benzoyl hydroperoxide, alkyl hydroperoxide or tertbutyl peroxide;
(5) reduction reaction:
Compound (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) epoxy ethyl] phenoxy group] methyl] ethyl succinic acid monoesters is dissolved in solvent, add reductive agent, stirring at room temperature 5 ~ 20 hours, aftertreatment obtains impurity (III);
The structural formula of described impurity (III) is as follows:
2. preparation method according to claim 1, is characterized in that: the mol ratio of [2-(3-anisole) ethene] phenol of 2-described in step (1) and epoxy chloropropane is 1:1 ~ 10; Described solvent is tetrahydrofuran (THF), acetone, tetracol phenixin or acetonitrile; Described alkali is salt of wormwood, potassium hydroxide, sodium hydroxide or potassium hydride KH; The mol ratio of described 2-[2-(3-anisole) ethene] phenol and alkali is 1:0.5 ~ 5.
3. preparation method according to claim 1, is characterized in that: described in step (2), the mol ratio of [[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] oxyethane and dimethylamine is 1:1 ~ 10; Described solvent is tetrahydrofuran (THF) or acetonitrile.
4. preparation method according to claim 1, is characterized in that: mol ratio 1:1 ~ 5 of [2-[2-(3-p-methoxy-phenyl) vinyl] the phenoxy group]-2-propyl alcohol of 1-dimethylin-3-described in step (3) and Succinic anhydried; Described solvent is tetrahydrofuran (THF), acetonitrile or tetracol phenixin.
5. preparation method according to claim 1, is characterized in that: mol ratio 1:1 ~ 5 of [[2-[2-(3-p-methoxy-phenyl) vinyl] phenoxy group] methyl] the ethyl succinic acid monoesters of (+/-)-2-(dimethylin)-1-described in step (4) and oxygenant; Described solvent is methylene dichloride, chloroform, tetrahydrofuran (THF), acetonitrile or tetracol phenixin; Described column chromatography eluent is the mixed solvent of methylene dichloride and methyl alcohol, and volume ratio is methylene dichloride: methyl alcohol=1 ~ 50:1; In step (4), oxygenant is metachloroperbenzoic acid or hydrogen peroxide.
6. preparation method according to claim 1, is characterized in that: the consumption of reductive agent described in step (5) is 1% ~ 20% of (+/-)-2-(dimethylin)-1-[[2-[2-(3-p-methoxy-phenyl) epoxy ethyl] phenoxy group] methyl] ethyl succinic acid monoesters quality; Described solvent is methyl alcohol, ethyl acetate, tetrahydrofuran (THF), methylene dichloride, chloroform or tetracol phenixin; Reductive agent described in step (5) is lithium aluminum hydride, sodium borohydride or palladium carbon.
7. preparation method according to claim 6, is characterized in that: described in step (5), reductive agent is palladium carbon.
8. preparation method according to claim 1, it is characterized in that: described in step (1), step (3), aftertreatment is all carried out according to following: suction filtration removes insoluble impurities, then the organic solvent except filtrate is steamed, the crude product obtained directly carries out next step reaction, without the need to being further purified.
9. preparation method according to claim 1, it is characterized in that: aftertreatment described in step (2) is carried out according to following: first steam and desolventize, add water, hydrochloric acid regulates PH to clarification, organic solvent extraction, water intaking phase, the sodium hydroxide solution of 50wt.% is adjusted to PH=9 ~ 10, organic solvent extraction, get organic phase, steam except this organic solvent again, obtain crude intermediate, directly carry out next step reaction.
10. preparation method according to claim 1, it is characterized in that: described in step (4), step (5), aftertreatment is all carried out according to following: first steam and desolventize, purify and adopt silica gel column chromatography, eluent adopts the mixing solutions of methylene dichloride and methyl alcohol, and the volume ratio of methylene dichloride and methyl alcohol is 1 ~ 50:1 ~ 20.
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| CN107382911A (en) * | 2017-08-04 | 2017-11-24 | 南京普氟生物检测技术有限公司 | Sarpogrelate hydrochloride genetoxic impurity V and preparation method thereof, detection method, application |
| CN107266394A (en) * | 2017-08-04 | 2017-10-20 | 南京普氟生物检测技术有限公司 | Sarpogrelate hydrochloride genetoxic impurity VI and preparation method thereof, detection method, application |
| CN108205034B (en) * | 2017-12-29 | 2020-10-27 | 天津红日药业股份有限公司 | Method for detecting related substances containing sarpogrelate hydrochloride intermediate |
| CN109824526A (en) * | 2019-03-18 | 2019-05-31 | 安徽峆一药业股份有限公司 | Sarpogrelate hydrochloride intermediate 2-(3- dimethylamino -2- hydroxyl) propoxybenzaldehyde synthetic method |
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