CN100383121C - Substituted benzyl ester and its preparation process and novel process for preparing substituted mopipe therefrom - Google Patents

Substituted benzyl ester and its preparation process and novel process for preparing substituted mopipe therefrom Download PDF

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CN100383121C
CN100383121C CNB2006100132557A CN200610013255A CN100383121C CN 100383121 C CN100383121 C CN 100383121C CN B2006100132557 A CNB2006100132557 A CN B2006100132557A CN 200610013255 A CN200610013255 A CN 200610013255A CN 100383121 C CN100383121 C CN 100383121C
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benzyl ester
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CN1827598A (en
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李祎亮
田青松
魏文涛
朱红星
杨胜利
周学福
瞿虹
吴民义
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Shanghai Guochuang Pharmaceutical Co ltd
Tianjin Taipu Pharmaceutical Co ltd
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Tianjin Taipu Pharmaceutical Science & Technology Development Co Ltd
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Abstract

The present invention discloses a benzyl ester compound substituted by (+)-(3R, 4R)-[[2S-[[4-(3-hydroxyphenyl-3, 4-dimethyl-1-piperidinyl)-methyl]-1-oxo-3-phenylpropyl]amino group] acetic acid, a preparation method thereof, and a new technology for preparing mopipe by the compound. The present invention has the following new technology method that the synthesis of 'a chain type' of the original patent method is converted into the respective preparation of 'two chains'; the total synthesis step is obviously shortened; the synthesis cost is obviously reduced and is about one half of that of the original patent method, and the benzyl ester compound has market competitiveness in the price aspect. Simultaneously, the synthesis reaction condition of the new technology is mild; the synthesis operation steps are simple; each-step reaction does not need to be operated under the conditions, such as specific low temperature, absolutely no water, etc., and accordingly, the benzyl ester compound is suitable for industrialized production.

Description

A Wei benzyl ester cpds and preparation method thereof and with the technology of this compound LY246736
Technical field
The present invention relates to the pharmaceutical chemistry synthesis technical field, say so more specifically (+)-(3R, 4R)-[[2S-[[4-(3-hydroxy phenyl-3,4-dimethyl-piperidino)-methyl]-1-oxo-3-hydrocinnamyl] amino] acetic acid substituted benzyl ester cpds and preparation method thereof and with the novel process of this compound LY246736.
Background technology
LY246736 (alvimopan) is a kind of new selective opiate receptor antagonist, is mainly used in the treatment post operative ileus.The preparation method of this product report at present has two kinds of methods, patented method 1 is with (+)-3R, 4R-(3-hydroxy phenyl)-3,4-lupetidine, 2 benzyl acrylic acid ethyl ester are starting raw material, through addition, hydrolysis, carboxylic close, chiral column chromatography, hydrolysis totally five step prepared in reaction target compounds (seeing patent CN1065455A); The shortcoming of this method is respectively to go on foot reaction product to be soup compound, the separation of intermediate, purifying, and the chirality Separation of Enantiomers all needs the method preparation by column chromatography, therefore is not suitable for suitability for industrialized production.Patented method 2 is with (+)-3R, 4R-(3-hydroxy phenyl)-3,4-lupetidine, methyl acrylate are starting raw material, through addition, alkylation, fractionation, hydrolysis, carboxylic close, hydrolysis altogether six-step process prepare target compound (seeing patent CN1057294C).This method has solved the technological difficulties that can't realize suitability for industrialized production in the method 1; but shortcoming is must use in the alkylating prepared in reaction process diisopropylamine lithium as alkalizing agent; and need operate at low temperature (40 ℃), absolute anhydrous condition; diisopropylamine lithium is at home without any manufacturer production at present; and this material belongs to strongly alkaline compound; has severe corrosive; must be under the condition of nitrogen protection, low temperature, airtight preservation; preservation condition is relatively harsher, and therefore the operation of this step reaction is not easy to carry out future scale operation.
Summary of the invention
The objective of the invention is to disclose intermediate A Wei benzyl ester cpds of synthetic LY246736 and preparation method thereof, and explore by experiment, verify, finally set up the new synthetic method of this compound, solve the technological difficulties in the synthesis technique for preparing alvimopan, made it to be more suitable for large-scale industrial production.
LY246736 intermediate A Wei benzyl ester cpds of the present invention, chemical name is (+)-(3R, 4R)-and [[2S-[[4-(3-hydroxy phenyl)-3,4-dimethyl-piperidino] methyl]-1-oxo-3-hydrocinnamyl] amino] acetic acid substituted benzyl ester cpds has following structure:
Figure C20061001325500051
Wherein: Y is electron-withdrawing groups such as hydrogen, chlorine, bromine or nitro; Y can be in ortho position, contraposition or a position of phenyl ring; Preferred Y is that hydrogen or Y are the contraposition at phenyl ring of bromine and bromine.
The preparation method of described compound: under the alkaline condition of organic solvent, compound III and Compound I I are carried out the N-alkylated reaction prepare Compound I
Figure C20061001325500052
Wherein: X is chlorine, bromine, methylsulfonyl, benzenesulfonyl or p-bromobenzenesulfonyl; Y is electron-withdrawing groups such as hydrogen, chlorine, bromine or nitro; Preferred Y is that hydrogen or Y are the contraposition at phenyl ring of bromine and bromine.
Wherein the mole ratio of compound III and Compound I I is 1: 1~10, preferred 1: 1~3.
Wherein said organic solvent is methyl alcohol, ethanol, Virahol, DMF, propyl carbinol, ethylene glycol monomethyl ether or acetonitrile etc.
Wherein preparing the used alkali of Compound I is selected from: mineral alkali or organic bases, and wherein mineral alkali is selected from yellow soda ash, sodium bicarbonate, salt of wormwood, potassium hydroxide, sodium hydroxide etc.; Organic bases is selected from triethylamine, pyridine, methylamine or dimethylamine.
Another object of the present invention is with (+)-(3R, 4R)-[[2S-[[4-(3-hydroxy phenyl)-3,4-dimethyl-piperidino] methyl]-1-oxo-3-hydrocinnamyl] amino] acetic acid substituted benzyl ester cpds is the novel process of the synthetic LY246736 of intermediate, this technology may further comprise the steps: compound (I) hydrogenation or hydrolysis are prepared target compound V.
Figure C20061001325500061
Wherein the used catalyzer of Compound I hydrogenation is Pd/C; The weight ratio of Compound I and catalyzer is 1: 0.1~5, preferred 1: 0.1~1, be more preferably 1: 0.1~and 0.5.
The present invention with (+)-(3R, 4R)-[[2S-[[4-(3-hydroxy phenyl)-3,4-dimethyl-piperidino] methyl]-1-oxo-3-hydrocinnamyl] amino] acetic acid substituted benzyl ester is that the synthetic route of the synthetic LY246736 of intermediate is:
Wherein, X is chlorine, bromine, methylsulfonyl, benzenesulfonyl or p-bromobenzenesulfonyl; Y is a hydrogen, chlorine, bromine or nitro.
The new synthesis process method is with optically pure individual isomer (+)-3R; 4R-(3-hydroxy phenyl)-3; 4-lupetidine, (S)-halogenated methyl phenylpropyl alcohol acyl glycine replace benzyl ester or (S)-alkylsulfonyl methylbenzene Propionylglycine, and to replace the benzyl ester be starting raw material; adopt the alkylating method of N-; the optical isomer of two chiralitys is synthesized the optically pure individual isomer product of preparation through alkylated reaction, and the method by hydrogenolysis or hydrolysis prepares target compound subsequently.
The advantage that the present invention adopts A Wei benzyl ester cpds to prepare the LY246736 novel process is:
1, new process under the condition of alkalescence, prepares single optical isomer through directed synthesizing of alkylated reaction with the optical isomer of two chiralitys.The reaction conditions of this synthetic method, post-treating method, configuration to the chiral centre of reaction raw materials, product does not change, and can obtain the material of ideal optical purity, saves the operation steps that adopts method that conventional chemical splits or the isolating method of chiral column to carry out stage enantiomer separation.The synthesis yield of new synthesis process method is about about 80%, compares with resolution yield in the patent documentation method about 34%, has significance and improves.
2, the synthesis step of new process is that synthetic changing into " two chain " with former patented method " chain type " prepares respectively, total synthetic step obviously shortens, synthetic cost obviously reduces, and is about 1/2nd of former patented method approximately, is having more the market competitiveness in price.
3, the synthetic reaction condition gentleness of novel process, the synthetic operation step is simple, and each step reaction does not need specific low temperature, absolute condition such as anhydrous to operate.This method has solved and has respectively gone on foot reaction product in the patented method 1 and be soup compound, the separation of intermediate, purifying etc. can't be realized the technological difficulties of suitability for industrialized production, also solved simultaneously and must use diisopropylamine lithium in the former patented method 2 in the alkylating prepared in reaction process as alkalizing agent, and the technological difficulties that need operate at low temperature (40 ℃), absolute anhydrous condition are more suitable for carrying out suitability for industrialized production.
4, the finished product of present method of novel process preparation can obtain by the method for hydrogenolysis, be white crystalline powder, have reduced in the product that carboxylic closes the issuable oxidized byproduct of reaction in the patent documentation.The content of the crude product of novel process preparation is about 96% in the experimentation, is about 88% according to the content of the crude product of former patented method preparation.The product appearance of novel process preparation is a white in addition, and the product appearance of former patented method preparation is an off-white color or light yellow, and according to the comprehensive comparison of quality product, the quality product of novel process more is better than the product of former patented method preparation.
Starting raw material (+)-3R of novel process, 4R-(3-hydroxy phenyl)-3, the synthesis route of 4-lupetidine:
Figure C20061001325500081
Specific implementation method is seen patent CN1065455A.
The starting raw material of novel process (S)-2-halogenated methyl phenylpropyl alcohol acyl-N-benzyl-glycine replaces the synthetic route of benzyl ester thing:
Figure C20061001325500082
Find in the experiment that Y is a polar group, as halo, nitro etc., the position of substitution is in contraposition, because electrophilic effect more helps to make A Wei benzyl ester thing to slough substituted benzyl by hydrogenolysis and prepares LY246736.(S)-and the synthetic method referenced patent EP0906900 of 2-halogenated methyl phenylpropyl alcohol acyl-N-benzyl-glycine benzyl ester substituent, EP0937710 is prepared.4-bromo-glycine benzyl ester tosilate is an industrial raw material.
Embodiment
The present invention will be further described below in conjunction with preparation example, embodiment.
One, preparation example 1:(S)-preparation of 2-halogenated methyl phenylpropyl alcohol acyl-glycine benzyl ester thing
1, the preparation of 3-hydroxyl-2-methene-3-methyl phenylpropionate
With the phenyl aldehyde of 67.3g, the methyl acrylate of 60ml, the triethylene diamine of 13.5g add in the reaction flask of 500ml, stirring at room 5 days, add 60ml water, 60ml concentrated hydrochloric acid, 120ml ethyl acetate, after mixing, layering, organic layer is washed 2 times with 20ml, the organic layer anhydrous magnesium sulfate drying filters concentrating under reduced pressure filtrate, get light yellow oil 110.5g, underpressure distillation, the cut of 85-90 ℃/7-9mmHg of collection, get colourless liquid 97.5g, content is greater than 98% (GC method), yield 80%.
2, the preparation of 2-methylol cinnamic acid
3-hydroxyl-2-methene-3-methyl phenylpropionate of 60g is dissolved in the diacetyl oxide of 65ml, stir the vitriol oil that drips 0.1ml down, be warming up to 95-100 ℃, stirred 4 hours, concentrating under reduced pressure gets yellow oil, yellow oil is dissolved in the methyl alcohol of 200ml, the sodium hydroxide of Dropwise 5 0g stirred concentrating under reduced pressure methyl alcohol 2 hours in the alkaline solution of the water configuration of 400ml, drip concentrated hydrochloric acid, regulate the pH value to 3-4, the ethyl acetate extraction of 100ml 3 times merges organic layer, concentrating under reduced pressure, get yellow oil 53g, content can directly drop into next step reaction greater than 90% (HPLC method).
3, the preparation of 2-methylol phenylpropionic acid
The 2-methylol cinnamic acid oily matter of 40g is added in the reaction flask of 500ml, 95% ethanol that adds 250ml, the Pd/C (10%) of adding 4g is warming up to 50-55 ℃, normal pressure hydrogenation, stirring reaction about 7 hours, filters until stopping to inhale hydrogen, concentrating under reduced pressure, get light yellow oil 35.8g, place gradually and solidify, content is greater than 95% (HPLC method).
4, the preparation of (S)-2-methylol phenylpropionic acid
The 2-methylol phenylpropionic acid of 35.8g is added in the water of 400ml, add (S)-phenylethylamine of 26.5f, be heated to 80-90 ℃ under stirring, all dissolving, be cooled to room temperature, separate out white, needle-shaped crystals gradually, filter drying, get 22.2g, fusing point 140-143 ℃, content is greater than 98% (HPLC method).(S)-2-methylol phenylpropionic acid phenylethylamine salt of 22.2g is added in the water of the ethyl acetate of 200ml and 100ml, add concentrated hydrochloric acid and regulate the pH value to 3-4, mix layering, the washing of organic layer usefulness 30ml 2 times, organic layer anhydrous magnesium sulfate drying, filter, concentrating under reduced pressure gets shallow white oily matter 12.5g, places gradually and solidifies, content is greater than 95% (HPLC method), yield 34.9%.
5, (S)-2-methylol phenylpropyl alcohol acyl-4 '-preparation of bromo-glycine benzyl ester
(S)-2-methylol phenylpropionic acid with 10g, 24.2g 4-bromo-glycine benzyl ester tosilate, the tetrahydrofuran (THF) of 100ml adds in the reaction flask of 250ml, stirs the triethylamine that adds 7.5ml down, 7.3g 1-hydroxy benzo triazole (HoBt), the DCC that adds 11.2g after about 10 minutes, stirring at room 24 hours is filtered, filtrate decompression concentrate light yellow oil, add the ethyl acetate of 100ml, the hydrochloric acid 100ml of 1N stirred 0.5 hour, filter, layering, organic layer is washed 2 times with 20ml, and the saturated sodium bicarbonate of 20ml is washed 2 times, wash 1 time, the organic layer anhydrous magnesium sulfate drying filters concentrating under reduced pressure, get oily matter 30.5g, add toluene: sherwood oil (1: 1) heating for dissolving, white crystals 22.1g is separated out in the room temperature cooling gradually, content is greater than 98% (HPLC method), fusing point 71-75 ℃, yield 90%, optical purity is greater than 99%.
6, (S)-2-methylsulfonyl methylbenzene propionyl-4 '-preparation of bromo-glycine benzyl ester
With (S)-2-methylol phenylpropyl alcohol acyl-4 of 14g '-bromo-glycine benzyl ester adds in the toluene of 100ml, the pyridine that adds 15ml stirs the methylsulfonyl chloride that adds 9.5ml down, stirring at room 24 hours, the hydrochloric acid 100ml that adds 1N, stirred 0.5 hour, and filtered layering, organic layer is washed 2 times with the saturated sodium bicarbonate of 20ml, wash 1 time, the organic layer anhydrous magnesium sulfate drying filters, concentrating under reduced pressure, get oily matter 17.5g, add toluene: normal hexane (2: 1) heating for dissolving, room temperature cooling, separate out white crystals 14.2g gradually, content is greater than 98% (HPLC method), fusing point 91-93 ℃, yield 85%.
7, (S)-2-brooethyl phenylpropyl alcohol acyl-4 '-preparation of bromo-glycine benzyl ester
With (S)-2-methylsulfonyl methylbenzene propionyl-4 of 12g '-bromo-glycine benzyl ester is dissolved in the acetone of 100ml, adds the lithiumbromide of 7g, reflux 24 hours, room temperature cooling is filtered, and is evaporated to dried light yellow oil, place gradually and solidify, the ethanol that adds 10ml, heating for dissolving, cooling, filter the white crystals thing of 0.16g, content is greater than 98% (HPLC method), fusing point 94-95 ℃, yield 95%.
8, the preparation of (S)-2-methylol phenylpropyl alcohol acyl-glycine benzyl ester
With (S)-2-methylol phenylpropionic acid of 20g, the glycine benzyl ester tosilate of 40g, the tetrahydrofuran (THF) of 200ml add in the reaction flask of 500ml, stir the triethylamine that adds 14ml down, the 1-hydroxy benzo triazole (HoBt) of 04.6g, the DCC of adding 22.4g after about 10 minutes, stirring at room 24 hours is filtered, filtrate decompression concentrate light yellow oil, add the ethyl acetate of 200ml, the hydrochloric acid 200ml of 1N stirred 0.5 hour, filter, layering, organic layer is washed 2 times with 40ml, and the saturated sodium bicarbonate of 40ml is washed 2 times, wash 1 time, the organic layer anhydrous magnesium sulfate drying filters concentrating under reduced pressure, get oily matter 56g, add toluene: sherwood oil (1: 1) heating for dissolving, white crystals 33.9g is separated out in the room temperature cooling gradually, content is greater than 98% (HPLC method), 62 ℃ of fusing points, yield 93%, optical purity is greater than 99%.
9, the preparation of (S)-2-methylsulfonyl methylbenzene propionyl-glycine benzyl ester
(S)-2-methylol phenylpropyl alcohol acyl-glycine benzyl ester of 15.9g is added in the toluene of 100ml, the pyridine that adds 15ml stirs the methylsulfonyl chloride that adds 9.5ml down, stirring at room 24 hours, the hydrochloric acid 100ml that adds 1N, stirred 0.5 hour, and filtered layering, organic layer is washed 2 times with the saturated sodium bicarbonate of 20ml, wash 1 time, the organic layer anhydrous magnesium sulfate drying filters, concentrating under reduced pressure, get oily matter 19.3g, add toluene: normal hexane (2: 1) heating for dissolving, room temperature cooling, separate out white crystals 17.6g gradually, content is greater than 98% (HPLC method), fusing point 80-82 ℃, yield 89.3%.
10, the preparation of (S)-2-brooethyl phenylpropyl alcohol acyl-glycine benzyl ester
(S)-2-methylsulfonyl methylbenzene propionyl-glycine benzyl ester of 17g is dissolved in the acetone of 100ml, adds the lithiumbromide of 7.3g, reflux 24 hours, room temperature cooling is filtered, and is evaporated to dried light yellow oil, place gradually and solidify, the ethanol that adds 10ml, heating for dissolving, cooling, filter the white crystals thing of 15.8g, content is greater than 98% (HPLC method), fusing point 94-95 ℃, yield 96.4%.
Two, preparation example 2:(+)-and 3R, 4R-(3-hydroxy phenyl)-3, the preparation of 4-lupetidine
1,1, the preparation of 3-dimethyl-4-(3-isopropyl phenyl)-4-hydroxy piperidine
Under the condition of nitrogen protection, the different third oxygen benzene of the 3-bromo of 60g is joined among the THF of 150ml, be cooled to-72 ℃, slowly drip n-Butyl Lithium (2.5M) 150ml.Drip to finish, under-60--70 ℃ condition, stirred 1 hour.Drip 1 of 30g then, 3-dimethyl-4-piperidine ketone, temperature of reaction remains on-60--70 ℃ about, stirred 1 hour.Stirring joins 6N hydrochloric acid in the reaction solution down, and regulating PH is 1~2, divides water-yielding stratum, transfers pH to 12 with 20% sodium hydroxide, uses ethyl acetate extraction 3 times, and organic layer merges, and anhydrous sodium sulfate drying spends the night.Filter, filtrate decompression is concentrated into dried, the normal heptane recrystallization.Filter, behind the product drying white solid 35g, mp71.5-73.4 ℃, HPLC content is greater than 98.%, yield 57.1%.
2, (3S, 4R)-1,3-dimethyl-4-(3-isopropyl phenyl)-4-piperidyl methyl acetoacetic ester. the preparation of (+) two pairs of toluyl tartrates
With 36gl, 3-dimethyl-4-(3-isopropyl phenyl)-4-hydroxy piperidine, the 155ml ethyl acetate joins in the reaction flask, the cooling of external application frozen water, temperature maintenance drips the 16ml Vinyl chloroformate below 10 ℃.Drip and finish stirring at room 3 hours.React and finish adding 20% aqueous sodium hydroxide solution, regulating PH is 12, layering, and the organic layer anhydrous magnesium sulfate drying filters, and the filtrate decompression evaporate to dryness gets brown oil 48.2g.(+) two pairs of toluyl tartrate list hydrate is dissolved in 95% ethanol of 200ml, stir, be heated to 60 ℃, ethanol (150ml) solution of step reaction oily matter in the adding, reflux, slowly be cooled to room temperature, separate out a large amount of solids, filter, get (+) crude product-two pair toluyl tartrate 40.6 grams, 150~153 ℃ of fusing points, HPLC content be greater than 98.%, yield 41%.
3, the preparation of dimethyl tetrahydro pyridine
The piperidines ester tartrate of 32g is added in the 100ml ethyl acetate, add 260ml water, stir adding NaOH (20%) water liquid down, adjusting PH is 10-11.Organic phase anhydrous Na SO 4Dried overnight.Filter, the filtrate decompression evaporate to dryness gets 17.2g oily matter.
Gained oily matter with the dissolving of 100ml perhydronaphthalene, is transferred in the there-necked flask, is warming up to reflux state stirring reaction 18h under the nitrogen protection.Reaction finishes, and is cooled to room temperature, and adding 4N hydrochloric acid adjusting PH is 1~2, divides water-yielding stratum, and water layer is regulated pH value to 8 with 20%NaOH water liquid, with ethyl acetate 50ml extraction 3 times, merges organic phase, uses anhydrous Na SO 4Dried overnight.Filter, filtrate decompression is concentrated into dried red-brown oil 12g (theoretical amount 109g), and content is greater than 96% (HPLC).
4, the preparation of trimethylammonium tetrahydropyridine
Dimethyl tetrahydro pyridine and the 100ml tetrahydrofuran (THF) of 12g are added in the reaction flask, be cooled to-20 ℃.Temperature control-20 ℃ drips the n-Butyl Lithium of 45ml, dropwises the back insulation and stirs 0.5h for-20 ℃.Temperature is dropped to-45 ℃~-50 ℃, slowly drip (the CH of 6ml 3) 2SO 4Drip and finish, stir 0.5h.Naturally rise to room temperature then.Add the about 30ml of ammoniacal liquor, behind the stirring 20min, standing demix.Water layer extracts 2 times with ethyl acetate 20ml again, merges organic phase, and evaporated under reduced pressure gets red-brown oil 12g, and content is 88.9% (HPLC), and pure is 10.7g, yield 92.8%.
5, (+)-3R, 4R-(3-isopropyl phenyl)-1,3, the preparation of 4-trimethyl-piperidine
12g trimethylammonium tetrahydropyridine is added in the 90ml ethanol (95%), be cooled under 5 ℃ of conditions and add NaBH in batches 4, stir.Remove ice bath then, rise to room temperature (25 ℃~30 ℃) naturally, stir 3h.Reaction finishes, the filtering solid, and pressure reducing and steaming ethanol gets oily matter.Transferring pH with 20%NaOH water liquid is 8 (spending 150ml approximately), and ethyl acetate extraction merges organic phase.Evaporated under reduced pressure gets oily matter.Add 95% ethanol 120ml, (+)-two couple toluyl tartrate 20g, stir, reflux, treat molten clear after, naturally cooling places refrigerator and cooled to hide to spend the night to be crystallized then.Product filters the back and measures 95% ethanol (1200ml) recrystallizations with 5 times, and getting the product dry weight is 16.5g, and mp.153.6~154.2 ℃ (decomposition), HPLC content is 100%, yield 61.9%.
6, (+)-3R, 4R-(3-hydroxy phenyl)-3, the preparation of 4-lupetidine
The tartrate of 34g is joined in 150ml ethyl acetate and the 150ml water, and adding 20% buck adjusting pH under stirring is 8~9, stirs 0.5h.Layering, water extracts 2 times with ethyl acetate 70ml, merges organic phase, anhydrous MgSO 4Dry.The filtering siccative, the filtrate decompression evaporate to dryness gets oily matter 14.6g.
Oily matter is added in the reaction flask, add 120ml toluene, be heated to 85 ℃.Drip phenyl chloroformate, about 0.5h drips off, then temperature rising reflux 2h.Reaction finishes, and is cooled to room temperature, and 20%NaOH water drop is added, and transferring pH is 10~11.After stirring 15min, layering, transferring pH with concentrated hydrochloric acid is 2, washing, evaporated under reduced pressure gets red-brown oil 20g.
Gained oil, 20ml glacial acetic acid, 20ml Hydrogen bromide are added in the reaction flask stirring heating back flow reaction 18h.Be cooled to room temperature, reaction solution adds entry 100ml, uses normal heptane extraction, and transferring pH with 20%NaOH water liquid is 9~10.Separate out pink solid 8.1g, mp180.8~183 ℃, content is greater than 98% (HPLC), yield 76%.
Three, embodiment 1:
1, (+)-(3R, 4R)-[[2S-[[4-(3-hydroxy phenyl)-3,4-dimethyl-piperidino] methyl]-1-oxo-3-hydrocinnamyl] amino] acetate-4 '-preparation of bromo benzyl ester
The A method:
With 10g (+)-3R, 4R-(3-hydroxy phenyl)-3, the 4-lupetidine, 25.9g (S)-2-methylsulfonyl methylbenzene propionyl-4 '-bromo-glycine benzyl ester, the Virahol of 300ml, the salt of wormwood of 9.6g, the potassiumiodide of 0.1g add in three mouthfuls of reaction flasks of 500ml, reflux 8 hours, TCL method detection reaction raw material primitive reaction is (R fully fValue is about 0.4, ethyl acetate/petroleum ether=1/1.5), be cooled to room temperature, filter, concentrating under reduced pressure gets the about 28.2g of yellow oil.The product content of preparation is about 80.4% (HPLC method), yield 78.6%.Can directly drop into next step reacts.
Get oily matter 1 gram by column separating purification, get the about 0.5g of pure product, content is greater than 95%.
1H?NMR(400MHz,DMSO)δ:0.64(d,3H),1.16(s,3H),1.41(d,1H),1.86(d,1H),2.0-2.9(m,10H),3.84(dd,2H),5.13(d,2H),6.52-6.67(m,3H),7.04-7.35(m,10H),8.44(t,1H),9.12(s,1H)
The B method:
With 5g (+)-3R, 4R-(3-hydroxy phenyl)-3,4-dimethyl-1-piperidines, 11.9g (S)-bromomethyl phenylpropyl alcohol acyl glycine-4 '-bromo benzyl ester, 100 milliliters Virahol, the salt of wormwood of 4.8 grams, a spot of potassiumiodide add in three mouthfuls of reaction flasks of 250ml, reflux 8 hours, TCL method detection reaction raw material primitive reaction is (R fully fValue is about 0.4, ethyl acetate/petroleum ether=1/1.5), be cooled to room temperature, filter, be evaporated to the greatest extent, get the about 14.8g of oily matter, content is about 81.2%, and yield 83.1% can directly drop into next step and react.
Embodiment 2
(+)-(3R, 4R)-[[2S-[[4-(3-hydroxy phenyl)-3,4-dimethyl-piperidino] methyl]-1-oxo-3-hydrocinnamyl] amino] preparation of acetate
Get the about 25g of reaction oily matter of step A method preparation, add in the reaction flask of 500ml, add acetate 300ml, the Pd/C of 5g (10%), normal temperature and pressure hydrogenation is stirred and was stopped to inhale hydrogen in 5 hours, filter, filtrate decompression is concentrated into to the greatest extent, adds sodium hydroxide (10%) and regulates pH value to 10, the concentrated hydrochloric acid acidifying is regulated the pH value to 5-6, stirring at room 1 hour, filter, filter cake washes twice with distillation, dry white crystalline powder 12.9g, fusing point 204-206 ℃ of getting.Content is greater than 96%.
The crude product of 12.9g is added the distilled water of 80ml, in the ethanol of 40ml, under the stirring condition, drip 20% sodium hydroxide, regulate pH value to 10, solids all dissolves.The concentrated hydrochloric acid acidifying is regulated the pH value to 5-6, and stirring at room 1 hour is filtered, and filter cake vacuumizes dry white crystalline powder 11.5g with twice, 120 ℃ of distillation washing, and fusing point 205-206 ℃, content is greater than 99%, yield 79.9%.
1H?NMR(400MHz,DMSO-d6):δ9.18(1H),8.34(t,1H),7.04-7.26(m,6H),6.53-6.69(m,3H),3.67(m,2H),2.14-2.91(m,11H),1.91(d,1H),1.45(d,1H),1.19(s,3H),0.65(d,3H);
13C?NMR(100MHz,DMSO-d6):δ173.64,171.25,157.07,151.45,139.95,128.86(2C),128.77((2C),128.08,125.84,116.02,112.45,112.15,59.71,54.73,49.98,43.89,41.03,37.93,37.82,35.51,29.82,27.12,15.67;
IR(KBr):3450.34,3242.29,3010.06,2978.24,2927.59,1687.23,1588.65,917.84,872.79,865.72,781.78,752.11,704.86
The B method:
The oily matter of the about 10g of reaction product of last step B method, add in the reaction flask of 100ml, add the sodium hydroxide (1N) of 20ml, the ethanol of 10ml, stirred 2 hours, the concentrated hydrochloric acid acidifying is regulated the pH value to 5-6, stirring at room 1 hour, filter, filter cake washes twice with distillation, dry off-white color crystalline powder 5.4g, fusing point 204-206 ℃ of getting.
The crude product of 5.4g is added the distilled water of 40ml, in the ethanol of 20ml, under the stirring condition, drip 20% sodium hydroxide, regulate pH value to 10, solids all dissolves.The concentrated hydrochloric acid acidifying is regulated the pH value to 5-6, and stirring at room 1 hour is filtered, and filter cake vacuumizes dry white crystalline powder 4.9g with twice, 120 ℃ of distillation washing, and fusing point 205-206 ℃, content is greater than 99%, yield 84.0%.
Embodiment 3
1, (+)-(3R, 4R)-[[2S-[[4-(3-hydroxy phenyl)-3,4-dimethyl-piperidino] methyl]-1-oxo-3-hydrocinnamyl] amino] preparation of acetate-benzyl ester
With 15g (+)-3R, 4R-(3-hydroxy phenyl)-3, the 4-lupetidine, 30g (S)-2-methylsulfonyl methylbenzene propionyl-glycine benzyl ester, the Virahol of 450ml, the salt of wormwood of 15 grams, the potassiumiodide of 0.15g add in three mouthfuls of reaction flasks of 1000ml, reflux 8 hours, TCL method detection reaction raw material primitive reaction is (R fully fValue is about 0.35, ethyl acetate/petroleum ether=1/1.5), be cooled to room temperature, filter, concentrating under reduced pressure gets the about 36.7g of yellow oil.The product content of preparation is about 0.77% (HPLC method), yield 75.1%.Can directly drop into next step reacts.
Get oily matter 2 grams by column separating purification, get the about 0.35g of pure product, content is greater than 95%.
1H?NMR(400MHz,DMSO)δ:0.66(d,3H),1.13(s,3H),1.47(d,1H),1.91(d,1H),2.1-3.0(m,10H),3.94(dd,2H),5.23(d,2H),6.52-6.70(m,3H),7.04-7.45(m,11H),8.49(t,1H),9.02(s,1H)。
Embodiment 4
(+)-(3R, 4R)-[[2S-[[4-(3-hydroxy phenyl)-3,4-dimethyl-piperidino] methyl]-1-oxo-3-hydrocinnamyl] amino] preparation of acetate
Get the about 30g of reaction oily matter of embodiment 3 methods preparation, add in the reaction flask of 500ml, add acetate 300ml, the Pd/C of 9g (10%), normal temperature and pressure hydrogenation is stirred and was stopped to inhale hydrogen in 5 hours, filter, filtrate decompression is concentrated into to the greatest extent, adds sodium hydroxide (10%) and regulates pH value to 10, the concentrated hydrochloric acid acidifying is regulated the pH value to 5-6, stirring at room 1 hour, filter, filter cake washes twice with distillation, dry white crystalline powder 15.8g, fusing point 204-206 ℃ of getting.Content is greater than 95%.
The crude product of 15.8g is added the distilled water of 80ml, in the ethanol of 40ml, under the stirring condition, drip 20% sodium hydroxide, regulate pH value to 10, solids all dissolves.The concentrated hydrochloric acid acidifying is regulated the pH value to 5-6, and stirring at room 1 hour is filtered, and filter cake vacuumizes dry white crystalline powder 12.4g with twice, 120 ℃ of distillation washing, and fusing point 205-206 ℃, content is greater than 99%, yield 65.1%.

Claims (7)

1. have (+) of following structure-(3R, 4R)-[[2S-[[4-(3-hydroxy phenyl)-3,4-dimethyl-piperidino] methyl]-1-oxo-3-hydrocinnamyl] amino] acetic acid substituted benzyl ester cpds:
Figure C2006100132550002C1
Wherein, Y is chlorine, bromine or nitro.
2. the preparation method of compound that claim 1 defines is characterized in that under the alkaline condition of organic solvent, Compound I I and compound III is carried out the N-alkylated reaction prepare Compound I;
Figure C2006100132550002C2
Figure C2006100132550002C3
Wherein: X is chlorine, bromine, methylsulfonyl, benzenesulfonyl or p-bromobenzenesulfonyl; Y is chlorine, bromine or nitro.
3. preparation method as claimed in claim 2, wherein the mole ratio of compound III and Compound I I is 1: 1~10.
4. preparation method as claimed in claim 2, wherein said organic solvent is ethanol, methyl alcohol, Virahol, propyl carbinol or ethylene glycol monomethyl ether.
5. preparation method as claimed in claim 2, wherein used alkali is selected from: yellow soda ash, sodium bicarbonate or salt of wormwood; Triethylamine, pyridine, methylamine alcohol solution or dimethylamine.
6. one kind is the technology of the synthetic LY246736 of intermediate with the defined compound of claim 1, it is characterized in that: Compound I hydrogenation or hydrolysis are prepared target compound V;
Figure C2006100132550003C1
7. technology as claimed in claim 6, wherein the used catalyzer of Compound I hydrogenation is Pd/C; The weight ratio of Compound I and catalyzer is 1: 0.1~0.5.
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CN101838233A (en) * 2010-05-27 2010-09-22 北京万全阳光医学技术有限公司 Preparation method of alvimopan key intermediate
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