CN101012147A - Method of preparing R-(+)-3-chlorophenylpropanol - Google Patents

Method of preparing R-(+)-3-chlorophenylpropanol Download PDF

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CN101012147A
CN101012147A CN 200710061510 CN200710061510A CN101012147A CN 101012147 A CN101012147 A CN 101012147A CN 200710061510 CN200710061510 CN 200710061510 CN 200710061510 A CN200710061510 A CN 200710061510A CN 101012147 A CN101012147 A CN 101012147A
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propyl alcohol
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chlorobenzene propyl
dimethyl
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CN100591649C (en
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陈天度
曹丽
陈品岗
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Shanghai Ma Jin Chemical Technology Co Ltd
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陈天度
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Abstract

The invention discloses a making method of R-(+)-3-chlophenicol, which is characterized by the following: adopting left-handed bulk of chiral amino acid derivant as catalyst; synthesizing 3-chlophenicol and NaBH4 or KBH4 directly to produce R-(+)-3-chlophenicol; selecting the left-handed bulk from one of left-handed isoleucine derivant, left-handed proline derivant, left-handed tryptophan derivant, left-handed cysteine derivant, left-handed histidine derivant and left-handed methionine derivant.

Description

The preparation method of R-(+)-3-chlorobenzene propyl alcohol
Technical field
The present invention relates to a kind of preparation method who can be used as the useful intermediates 3-chlorobenzene propyl alcohol of treatment dysthymia disorders medicine, particularly relate to the preparation method of its single rotator R-(+)-3-chlorobenzene propyl alcohol.
Background technology
Dapoxetine (Dapoxetine), chemical name S-(+)-N, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride (N, N-dimethyl-α-[2-(naphthalenyloxy) ethyl] benyenemethanamine hydrochloride), it is a kind of selectivity serotonin reuptake inhibithors, can be used for treating diseases such as melancholia and excessive drinking, fat-reducing, memory loss, to forgetful, irritability, depressed, unsociable and eccentric effective, also be that first is used for the treatment of the oral pharmaceutical of prospermia of males in the world simultaneously.This medicine is a kind of optionally seronine uptake inhibitor, and to not directly effect of neuronal acceptor.Because such medicine can not suppress other monoamine effectively, so the expection side effect is smaller after dispenser.
1988, U.S. Eli Lilly Company applied for the pharmaceutical patent (EP288188) of α-[2-(naphthyloxy) ethyl] benzene methanamine and derivative thereof, the DL body that is actually α-[2-(naphthyloxy) ethyl] benzenemethanamine derivatives that this patent relates to.Among the target compound preparation method who in this patent, provides, a kind of effective means is by with benzaldehyde derivative and propanedioic acid and ammonium acetate reaction, generate corresponding beta-amino phenylpropionic acid, and further be converted into the corresponding carboxylic acid ester, restore and be alcohol, at last the hydroxy intermediate of gained is handled with alkalimetal hydride and generated corresponding alkali metal salt, with the suitable compound reaction that contains good leavings group, make target compound again.
200510012624 of Chinese patents further provide a kind of method for preparing dextrorotation α-[2-(naphthyloxy) ethyl] benzenemethanamine derivatives, specifically be to make phenyl aldehyde and propanedioic acid and ammonium acetate reaction obtain the beta-amino phenylpropionic acid earlier, re-using the anhydrous tartrate of dextrorotation splits the beta-amino phenylpropionic acid, obtain dextrorotation beta-amino phenylpropionic acid, make the compound reaction of dextrorotation beta-amino phenylpropionic acid and general formula (c) expression then
Figure A20071006151000051
Obtain the compound of general formula (d) expression,
Figure A20071006151000052
Again the compound reduction of general formula (d) expression is converted into the compound of general formula (b) expression,
Figure A20071006151000053
At last, compound and the α-Xiu Dainai reaction with general formula (b) expression obtains dextrorotation α-[2-(naphthyloxy) ethyl] benzenemethanamine derivatives that general formula (a) is represented.
Figure A20071006151000061
What this patent was different with other preparation feedback is that promptly DL beta-amino phenylpropionic acid begins, and just optically-active compound is split, rather than splits to the finished product again from a generation optically-active compound.This technology can be saved the raw material consumption of each step reaction subsequently greatly, also greatly reduces the discarded levorotatory amount of generation.
Chinese patent 200610024697 discloses a kind of synthetic method of dapoxetine, and is specific as follows:
1. with 3-chlorophenyl acetone and NaBH 4In the glycol dinitrate ether solvents, obtain the 3-chlorobenzene propyl alcohol behind the reaction 1h;
Figure A20071006151000062
2. 3-chlorobenzene propyl alcohol and methyl naphthol are carried out condensation reaction in KOH/DMF solution, obtain condensation product 3-(1-naphthyloxy)-1-phenyl-1-propyl alcohol;
Figure A20071006151000063
3. the condenses with step 2 adds in Dimethylamino pyridine/tetrahydrofuran (THF)/triethylamine solution, stir ice bath and drip methane sulfonyl chloride down, feed dimethylamine gas behind the 6h, after stirring 30h under the room temperature, decompression and solvent recovery, obtain N, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride crude product;
4. with Ltartaric acid splitting step 3 crude products, obtain its Ltartaric acid salt, behind recrystallization, change into S-(+)-N again, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride.
Obtaining to have the most current way of single rotator character compound now in the world is to adopt the method that splits that single rotator character compound is separated from the DL body, behind the single rotator that needing to obtain, another part single rotator then discards as waste material or racemization becomes the DL body, is reused for fractionation again.Its racemization becomes the technology of DL body, and regardless of expense carries out in order to solve environmental issue sometimes, the intermediate dextrorotation amido thing of for example making paraxin is the waste material after a kind of the fractionation, in order to solve these a large amount of discarded discharging solids, its racemization have to be made DL amido thing, and its preparation cost is to be higher than DL amido thing that usual way makes far away.Equally, the synthetic method of patent 200610024697 can produce R-(-)-N with the target product same amount inevitably, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride waste.
It is starting raw material that 5292962 of U.S. Pat provide a kind of single rotator with the 3-chlorobenzene propyl alcohol, directly synthetic N, the method of N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride single rotator, specifically be with the synthetic S-(+) of R-(+)-3-chlorobenzene propyl alcohol-N, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride, with the synthetic R-(-) of S-(-)-3-chlorobenzene propyl alcohol-N, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride.Similar with Chinese patent 200510012624, this method can be saved the raw material consumption of subsequent step, reduces the discarded thing amount of singly revolving.
Yet the single rotator of 3-chlorobenzene propyl alcohol still needs to obtain by splitting in the aforesaid method, still can produce the discarded thing that singly revolves of 3-chlorobenzene propyl alcohol.So how many in the world people can go out to have the compound of our required opticity by one-step synthesis in research, and avoid resolution process.But the compound that has required opticity that only a few also only arranged up to now, in the world is one-step synthesis without fractionation.
Summary of the invention
The purpose of this invention is to provide a kind of fractionation that do not need, is starting raw material with the 3-chlorophenyl acetone, the preparation method of directly synthetic R-(+)-3-chlorobenzene propyl alcohol single rotator after reducing.
We find in research process, when the derivative that uses the amino acid single rotator during as catalyzer, can be unexpectedly by the 3-chlorophenyl acetone directly reduction obtain the single rotator of 3-chlorobenzene propyl alcohol, find that based on this we have developed a kind of preparation method of brand-new R-(+)-3-chlorobenzene propyl alcohol.
The preparation method of R-of the present invention (+)-3-chlorobenzene propyl alcohol is that the levo form with chiral amino acid derivative is a catalyzer, by 3-chlorophenyl acetone and NaBH 4Or KBH 4The directly synthetic R-(+) of reaction-3-chlorobenzene propyl alcohol.
Wherein, the levo form of described chiral amino acid derivative is meant a kind of in left-handed Isoleucine derivative, levoproline derivative, Try derivative, left-handed cystine derivatives, l-histidine derivative, the L-Methioine derivative.
Particularly, described left-handed Isoleucine derivative is meant the compound of general formula (I) expression:
Figure A20071006151000071
In the formula:
R1 and R2 are H, C independently of one another 1~C 4Alkyl, phenyl or tolyl;
R3 and R4 are H or C independently of one another 1~C 4Straight chained alkyl.
Typical left-handed Isoleucine derivative can have:
S-(-)-, the different bright amine alcohol of alpha-alpha-dimethyl; The bright amine alcohol of S-(-)-α-isopropyl; S-(-)-N, N-dimethyl-α, the different bright amine alcohol of alpha-alpha-dimethyl; S-(-)-N, N-dimethyl-α, the different bright amine alcohol of α-di-isopropyl; S-(-)-N, the different bright amine alcohol of N-dimethyl-Alpha-Methyl-α-ethyl; S-(-)-N-methyl-N-ethyl-α, the different bright amine alcohol of alpha-alpha-dimethyl; S-(-)-N-methyl-N-ethyl-α, the different bright amine alcohol of α-di-isopropyl; S-(-)-N, the different bright amine alcohol of N-dimethyl-α-p-methylphenyl; S-(-)-N, N-diethyl-α, the different bright amine alcohol of alpha-alpha-dimethyl; S-(-)-N, the different bright amine alcohol of N-diethyl-α-p-methylphenyl; S-(-)-N, the different bright amine alcohol of N-dimethyl; S-(-)-N, N-diethyl-α, the different bright amine alcohol of α-di-t-butyl; S-(-)-N, the different bright amine alcohol of N-dimethyl-Alpha-Methyl; S-(-)-N-methyl-α, the different bright amine alcohol of α-di-isopropyl; The different bright amine alcohol of S-(-)-N-methyl-α-p-methylphenyl; S-(-)-N, the different bright amine alcohol of N-dimethyl-α-phenyl; The different bright amine alcohol of S-(-)-α-phenyl; Or the like.
Described levoproline derivative is meant the compound of general formula (II) expression:
Figure A20071006151000081
In the formula:
R1 and R2 are H, C independently of one another 1~C 4Alkyl, phenyl or tolyl;
R3 is H or C 1~C 4Straight chained alkyl.
Typical levoproline derivative can have:
S-(-)-N-methyl-α, α-di-p-tolyl dried meat ammonia alcohol; S-(-)-N-methyl-α, α-diphenylprolinol; S-(-)-N-methyl-α, alpha-alpha-dimethyl dried meat ammonia alcohol; S-(-)-N-methyl-α, α-diethyl dried meat ammonia alcohol; S-(-)-N-methyl-α, α-di-isopropyl dried meat ammonia alcohol; S-(-)-N-methyl-Alpha-Methyl-α-ethyl dried meat ammonia alcohol; S-(-)-N-methyl-α-p-methylphenyl dried meat ammonia alcohol; S-(-)-N-methyl-α-phenyl dried meat ammonia alcohol; S-(-)-N-methyl-Alpha-Methyl dried meat ammonia alcohol; S-(-)-N-methyl dried meat ammonia alcohol; S-(-)-α, α-di-p-tolyl dried meat ammonia alcohol; S-(-)-α, alpha-alpha-dimethyl dried meat ammonia alcohol; S-(-)-N-ethyl-α, alpha-alpha-dimethyl dried meat ammonia alcohol; S-(-)-N-ethyl-α, α-di-p-tolyl dried meat ammonia alcohol; S-(-)-N-propyl group-α, α-diethyl dried meat ammonia alcohol; S-(-)-N-ethyl-α, α-di-isopropyl dried meat ammonia alcohol; S-(-)-N-propyl group-Alpha-Methyl-α-ethyl dried meat ammonia alcohol; S-(-)-N-ethyl-Alpha-Methyl dried meat ammonia alcohol; S-(-)-N-ethyl dried meat ammonia alcohol; Or the like.
Described Try derivative is meant the compound of general formula (III) expression:
In the formula:
R1, R2, R3 and R4 are H, C independently of one another 1~C 4Alkyl, phenyl or tolyl;
R5 is H or C 1~C 4Straight chained alkyl.
Typical Try derivative can have:
S-(-)-α, the alpha-alpha-dimethyl tryptosol; S-(-)-α, α-di-isopropyl tryptosol; S-(-)-α, α-di-p-tolyl tryptosol; S-(-)-α-phenyl tryptosol; S-(-)-N, N-dimethyl-α-p-methylphenyl tryptosol; S-(-)-indoles N-ethyl-Alpha-Methyl-α-ethyl tryptosol; S-(-)-indoles N-ethyl-N, N-dimethyl-α, α-di-isopropyl tryptosol; S-(-)-Alpha-Methyl-α-ethyl tryptosol; S-(-)-indoles N-methyl-α, the alpha-alpha-dimethyl tryptosol; S-(-)-indoles N-methyl-N, N-dimethyl-α, alpha-alpha-dimethyl tryptosol; S-(-)-N, N-dimethyl-α-phenyl tryptosol; S-(-)-N-methyl-N-ethyl-α, α-di-isopropyl tryptosol; S-(-)-N, N-dimethyl-α, alpha-alpha-dimethyl tryptosol; S-(-)-N, N-dimethyl-Alpha-Methyl-α-ethyl tryptosol; S-(-)-N, N-dimethyl tryptosol; S-(-)-N-methyl-N-isopropyl propyl group-α, α-phenylbenzene tryptosol; S-(-)-N-methyl-N-ethyl-α-p-methylphenyl tryptosol; S-(-)-N, N-diethyl-α-p-methylphenyl tryptosol; S-(-)-N-methyl-α, α-di-isopropyl tryptosol; S-(-)-N, N-diethyl-α, α-di-t-butyl tryptosol; S-(-)-indoles N-propyl group-α-p-methylphenyl tryptosol; S-(-)-indoles N-methyl tryptosol; Or the like.
Described left-handed cystine derivatives is meant the compound of general formula (IV) expression:
In the formula:
R1 is methyl, ethyl or phenyl;
R2 is H or C 1~C 4Alkyl.
Typical left-handed cystine derivatives can have:
S-(-)-N, N-dimethyl-N ', N '-dimethyl-cystine dimethyl; S-(-)-N, N-diethyl-N ', N '-diethyl-cystine dimethyl; S-(-)-N, N-di-isopropyl-N ', N '-di-isopropyl-cystine dimethyl; S-(-)-N, N-dimethyl-N ', N '-dimethyl-Gelucystine diphenyl ester; S-(-)-N, N-di-isopropyl-N ', N '-di-isopropyl-Gelucystine diphenyl ester; S-(-)-N, N-dimethyl-N ', N '-dimethyl-Gelucystine diethyl ester; S-(-)-Gelucystine diethyl ester; S-(-)-cystine dimethyl; S-(-)-Gelucystine diphenyl ester; Or the like.
Described l-histidine derivative is meant the compound that logical formula V is represented:
Figure A20071006151000101
In the formula:
R1 is methyl, ethyl or phenyl;
R2 and R3 are H or C independently of one another 1~C 4Straight chained alkyl;
Typical l-histidine derivative can have:
S-(-)-N, N-dimethyl Histidine ethyl ester; S-(-)-N, N-dimethyl Histidine phenyl ester; S-(-)-N, N-dipropyl Histidine methyl esters; S-(-)-N, N-diethyl Histidine phenyl ester; S-(-)-N-methyl-N-ethyl Histidine ethyl ester; S-(-)-N-methyl-N-ethyl Histidine phenyl ester; S-(-)-Histidine phenyl ester; S-(-)-Histidine methyl esters; Or the like.
Described L-Methioine derivative is meant the compound of general formula (VI) expression:
In the formula:
R1 is methyl, ethyl or phenyl;
R2 and R3 are H or C independently of one another 1~C 4Straight chained alkyl;
Typical L-Methioine derivative can have:
S-(-)-N-methyl-N-ethyl methionine(Met) phenyl ester; S-(-)-N, N-dimethyl methionine(Met) ethyl ester; S-(-)-N, N-diethyl methionine(Met) phenyl ester; S-(-)-methionine(Met) ethyl ester; S-(-)-methionine(Met) phenyl ester; S-(-)-N-methyl-N-ethyl methyl methionine; S-(-)-N-methylmethionine methyl esters; S-(-)-N-propyl group methionine(Met) phenyl ester; S-(-)-N-ethyl methyl methionine; S-(-)-N, N-dimethyl methyl methionine; S-(-)-N, N-diethyl methionine(Met) ethyl ester; S-(-)-N-methyl-N-ethyl methyl methionine; S-(-)-N-methylmethionine phenyl ester; Or the like.
Among the preparation method of the present invention, be that the levo form with above-mentioned a kind of chiral amino acid derivative is a catalyzer, by 3-chlorophenyl acetone and NaBH 4Or KBH 4Mol ratio according to 1: 0.5~5, reaction in the presence of Zinc Chloride Anhydrous or anhydrous stannic chloride is with preparation R (+)-3-chlorobenzene propyl alcohol.Reaction of the present invention is carried out in such as anhydrous solvents such as dimethyl sulfoxide (DMSO), dimethyl formamide, tetrahydrofuran (THF), ethylene dichloride, trichloromethanes.In reaction of the present invention, the suitable 3-chlorophenyl acetone and the mol ratio of chiral amino acid derivative catalyzer are 1: 0.6~3.
Usually the way of preparation R-(+)-3-chlorobenzene propyl alcohol is earlier synthetic 3-chlorobenzene propyl alcohol DL body, through splitting, makes R-(+)-3-chlorobenzene propyl alcohol again.R-(+)-3-chlorobenzene propyl alcohol by this method production, because the instability of operation and the restriction that is subjected to disassemble technique, the dextrorotatory form content of the 3-chlorobenzene propyl alcohol that obtains can not reach 100%, usually, only can obtain content by disassemble technique is 97~98% dextrorotatory, and the specific rotation of product is+24 °.And adopt the present invention with the levo form of chiral amino acid derivative catalysis directional synthesising technology as catalyzer, and can obtain dextrorotatory form content 100%, the product specific rotation reaches+R-(+)-3-chlorobenzene propyl alcohol product of 25 °.
Adopt method of the present invention to prepare R-(+)-3-chlorobenzene propyl alcohol, can not produce 50% levo form, thereby yield is enhanced about more than once, product cost descends greatly than resolution process.Because 50% levorotatory that resolution process produces is otiose industrial waste, very bad processing, and directional synthesising technology of the present invention does not produce levo form, therefore can deserve to be called an environmental protection project.
Equally, with R-of the present invention (+)-3-chlorobenzene propyl alcohol is starting raw material, can directly synthesize compound S-(+)-N of our required opticity, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride, thereby avoided resolution process, greatly reduced production cost.General S-(+)-N that adopts Split Method technology to obtain, the specific rotation (1% chloroform soln) of N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride is up to+and 128 °, the content of single rotator also only is 97~98%, and S-(+)-N that adopts R-of the present invention (+)-3-chlorobenzene propyl alcohol to prepare, the specific rotation of N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride can reach+and 129.1 °, single rotator purity can reach 100%.
Embodiment
Embodiment 1:
Get dimethyl sulfoxide (DMSO) 200mL, S-(-)-N, N-dimethyl-α, the different bright amine alcohol 30g of α-di-isopropyl, NaBH 49g adds in the three-necked bottle, add the dimethyl sulfoxide (DMSO) 100mL that contains the 28g Zinc Chloride Anhydrous again, stir, get 3-chlorophenyl acetone 34g under 25~30 ℃ of conditions adds in batches, be warming up to backflow, reaction 14h is cooled to room temperature, removes by filter filter residue, with filtrate heat up evaporate to dryness and reclaim solvent after, add the 300mL ethylene dichloride again, be cooled to 0 ℃, insulation crystallization 8h, filter, obtain R-(+)-about 18g of 3-chlorobenzene propyl alcohol solid crude product, crude product with 250mL ethylene dichloride recrystallization, is obtained R-(+)-3-chlorobenzene propyl alcohol solid 11g.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 56~57 ℃, specific rotation α 19=+25 °.
Embodiment 2:
With dimethyl sulfoxide (DMSO) 350mL, S-(-)-N, the different bright amine alcohol 35g of N-dimethyl-α-p-methylphenyl, NaBH 410g, Zinc Chloride Anhydrous 15g, 3-chlorophenyl acetone 35g adds in the three-necked bottle together, stir, be warming up to backflow, reaction 24h, be cooled to room temperature, remove by filter filter residue, add NaOH solution 100mL and the water 300mL of 5mol/L in the filtrate, in 40 ℃ of following stirring reaction 1h, standing demix, branch vibration layer with the solvent layer evaporate to dryness and after reclaiming solvent, is emitted resistates while hot, obtain R-(+)-about 30g of 3-chlorobenzene propyl alcohol crude product after the cooling, with crude product anhydrous isopropyl alcohol recrystallization, obtain R-(+)-about 23g of 3-chlorobenzene propyl alcohol elaboration, yield is about 68%~73%.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 57~59 ℃, specific rotation α 19=+25 °.
Embodiment 3:
Earlier the 18g anhydrous stannic chloride is joined in the 200mL tetrahydrofuran (THF), it is standby to make suspension liquid A.Get tetrahydrofuran (THF) 150mL respectively, the different bright amine alcohol 37.8g of S-(-)-N-methyl-N-ethyl-Alpha-Methyl-α-ethyl, KBH 415g, 3-chlorophenyl acetone 21g-rise and add in the three-necked bottle, stir, and are warming up to 40 ℃, add suspension liquid A, stir temperature rising reflux reaction 18h down, and reaction finishes, and is cooled to 40 ℃, removes by filter filter residue.Filtrate intensification evaporate to dryness and reclaim solvents tetrahydrofurane after, add the 400mL normal hexane, be heated to transparent, be cooled to 5 ℃ again, insulation crystallization 3h filters, and obtains R-(+)-3-chlorobenzene propyl alcohol solid crude product, behind crude product usefulness 250mL Virahol recrystallization, obtain R-(+)-about 8g of 3-chlorobenzene propyl alcohol white solid.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 58~60 ℃, specific rotation α 19=+25 °, molecular weight is 170.64 after testing.
Embodiment 4:
With 9g Zinc Chloride Anhydrous and 100mL dimethyl formamide mixing, it is standby to make suspension liquid A earlier.Get dimethyl formamide 250mL again, S-(-)-N-methyl-α, α-di-p-tolyl Prolinol 23.2g, NaBH 49g, 3-chlorophenyl acetone 21g adds in the three-necked bottle together, divides to add above-mentioned suspension liquid A 2 times, slowly is warming up to 95~98 ℃, under agitation reacts 12h, and reaction finishes, and removes by filter filter residue.Intensification evaporate to dryness and reclaim the solvent dimethyl formamide under vacuum, add the 200mL ethyl acetate in the resistates, heating for dissolving is to as clear as crystal, be cooled to 0 ℃ again, insulation crystallization 0.5h filters, and obtains R-(+)-3-chlorobenzene propyl alcohol solid crude product, crude product with 300mL hexanaphthene recrystallization, is obtained R-(+)-about 3.5g of 3-chlorobenzene propyl alcohol white solid.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 56~59 ℃, specific rotation α 19=+25 °.
Embodiment 5:
With dimethyl formamide 350mL, S-(-)-N-sec.-propyl-α-p-methylphenyl Prolinol 26.1g, KBH 411g, Zinc Chloride Anhydrous 10g, borax 0.8g, 3-chlorophenyl acetone 20g adds in the three-necked bottle together, is heated to backflow under stirring, and reaction 12h is cooled to room temperature, removes by filter filter residue.Under vacuum the intensification evaporate to dryness and reclaim the solvent dimethyl formamide after, the NaOH solution 150mL and the water 100mL that add 3mol/L in the resistates, hexanaphthene 200mL, room temperature reaction 1h under violent stirring, standing demix, branch vibration layer, solvent layer are repeatedly with the clear water washing, until water layer pH=7~7.2 of telling.Solvent layer is concentrated into volume is about 50mL, be cooled to room temperature, obtain R-(+)-3-chlorobenzene propyl alcohol crude product, crude product is filtered out,, obtain R-(+)-about 5.5g of 3-chlorobenzene propyl alcohol elaboration with 100mL hexanaphthene recrystallization.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 55~57 ℃, specific rotation α 19=+25 °.
Embodiment 6:
Get tetrahydrofuran (THF) 300mL, S-(-)-α, alpha-alpha-dimethyl Prolinol 12g, KBH 411g, Zinc Chloride Anhydrous 12g, 3-chlorophenyl acetone 15g adds in the three-necked bottle together, is heated to backflow under stirring, reaction 8h, reaction finishes, and is cooled to room temperature, removes by filter filter residue.Add the NaOH solution 300mL of 2mol/L in the filtrate, stir 1h under the room temperature, standing demix, branch vibration layer, solvent layer washs 0.5h, standing demix with the acetum 200mL of 1mol/L, branch vibration layer, solvent layer are used the clear water repetitive scrubbing again, are neutrality until the water layer of telling.With the solvent layer evaporate to dryness and after reclaiming solvents tetrahydrofurane, emit the resistates of melting while hot, obtain R-(+)-3-chlorobenzene propyl alcohol crude product after the cooling, crude product with 100mL hexanaphthene recrystallization, is obtained R-(+)-about 3g of 3-chlorobenzene propyl alcohol elaboration.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 57~59 ℃, specific rotation α 19=+25 °.
Embodiment 7
With tetrahydrofuran (THF) 300mL, S-(-)-indoles N-methyl-α, α-phenylbenzene tryptamines alcohol 33g, KBH 48g, anhydrous stannic chloride 5g, 3-chlorophenyl acetone 13g adds in the three-necked bottle together, stirs heating reflux reaction 12h down, after finishing, is cooled to room temperature, removes by filter filter residue.Add the HCl solution 200mL of 3mol/L in the filtrate, stir 0.5h under the room temperature, standing demix, branch vibration layer, solvent layer is with 0.5% NaHCO 3Solution 100mL washing, standing demix, branch vibration layer, solvent layer are used the clear water repetitive scrubbing again, are neutrality until the water layer of telling.With the solvent layer evaporate to dryness and after reclaiming solvents tetrahydrofurane, emit the resistates of melting while hot, obtain R-(+)-3-chlorobenzene propyl alcohol crude product after the cooling, with crude product 150mL acetone recrystallization, obtain R-(+)-about 6.8g of 3-chlorobenzene propyl alcohol elaboration.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 57~59 ℃, specific rotation α 19=+25 °.
Embodiment 8
With dimethyl formamide 300mL, S-(-)-N, N-dimethyl-α, α-di-p-tolyl tryptamines alcohol 36.3g, NaBH 48g, anhydrous stannic chloride 5g, 3-chlorophenyl acetone 13g adds in the three-necked bottle together, is heated to backflow under stirring, and reaction 24h after reaction finishes, is cooled to room temperature, removes by filter filter residue.Add the acetum 200mL of 3mol/L in the filtrate, at room temperature stir 0.5h, standing demix, branch vibration layer, solvent layer is with 0.5% Na 2CO 3Solution 100mL washing, standing demix, branch vibration layer, solvent layer are used the clear water repetitive scrubbing again, are neutrality until the water layer of telling.With the solvent layer evaporate to dryness and after reclaiming the solvent dimethyl formamide, emit the resistates of melting while hot, obtain R-(+)-3-chlorobenzene propyl alcohol crude product after the cooling, with crude product 300mL acetone recrystallization, obtain R-(+)-about 5.1g of 3-chlorobenzene propyl alcohol elaboration.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 57~59 ℃, specific rotation α 19=+25 °.
Embodiment 9:
Get dimethyl formamide 300mL respectively, S-(-)-indoles N-propyl group-N, N-dimethyl-α-sec.-propyl tryptamines alcohol 21.5g, KBH 410g, Zinc Chloride Anhydrous 7g, 3-chlorophenyl acetone 12g add in the three-necked bottle, stir heating reflux reaction 14h down, after reaction finishes, are cooled to room temperature, remove by filter filter residue.Add the NaOH solution 150mL of 3mol/L in the filtrate, stir 1h under the room temperature, standing demix, branch vibration layer, solvent layer washs 0.5h, standing demix with the acetum 100mL of 1mol/L, branch vibration layer, solvent layer are used the clear water repetitive scrubbing again, are neutrality until the water layer of telling.With the solvent layer evaporate to dryness and after reclaiming the solvent dimethyl formamide, emit the resistates of melting while hot, obtain R-(+)-3-chlorobenzene propyl alcohol crude product after the cooling, crude product with 100mL pimelinketone recrystallization, is obtained R-(+)-about 4.2g of 3-chlorobenzene propyl alcohol elaboration.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 56~58 ℃, specific rotation α 19=+25 °.
Embodiment 10:
With dimethyl formamide 200mL, S-(-)-N, N-dimethyl-N ', N '-dimethyl cystine dimethyl 20g, NaBH 410g, Zinc Chloride Anhydrous 7g, 3-chlorophenyl acetone 12g adds in the three-necked bottle together, is heated to backflow under stirring, and reaction 12h after reaction finishes, is cooled to room temperature, removes by filter filter residue.The NaOH solution 150mL that adds 3mol/L in the filtrate, stirring reaction 0.5h, standing demix, branch vibration layer, behind the acetum 200mL washing 0.5h of solvent layer with 0.5mol/L, standing demix, branch vibration layer, solvent layer are used the clear water repetitive scrubbing again, are neutrality until the water layer of telling.With the solvent layer evaporate to dryness and after reclaiming the solvent dimethyl formamide, add the 300mL hexanaphthene in the resistates, reflux is limpid transparent to solution, is cooled to 5 ℃ again, and insulation crystallization 10h filters, and obtains R-(+)-3-chlorobenzene propyl alcohol elaboration 9g, yield about 75%.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 56~58 ℃, specific rotation α 19=+25 °.
Embodiment 11
With dimethyl formamide 500mL, the two ethyl ester 23g of S-(-)-Gelucystine, KBH 46g, Zinc Chloride Anhydrous 7g, 3-chlorophenyl acetone 9.7g adds in the three-necked bottle together, is heated to backflow under stirring, and reaction 10h after reaction finishes, is cooled to room temperature, removes by filter filter residue.The HCl solution 400mL that adds 1mol/L in the filtrate, stirring reaction 0.5h leaves standstill the back branch vibration layer, the solvent layer NaHCO of 1mol/L 3Solution 300mL washs 0.5h, standing demix, and branch vibration layer, solvent layer are used the clear water repetitive scrubbing again, are neutrality until the water layer of telling.With the solvent layer evaporate to dryness and after reclaiming the solvent dimethyl formamide, add the 600mL hexanaphthene in the resistates, reflux is limpid transparent to solution, continues to stir 1h again, is cooled to room temperature, filters and obtains R-(+)-3-chlorobenzene propyl alcohol elaboration 13g, yield about 78%.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 56~58 ℃, specific rotation α 19=+25 °, molecular weight is 170.64 after testing.
Embodiment 12:
Get trichloromethane 300mL, S-(-)-N, N-dimethyl-N ', the two phenyl ester 36g of N '-dimethyl Gelucystine, KBH 46g, Zinc Chloride Anhydrous 2g, 3-chlorophenyl acetone 17g add in the three-necked bottle, are heated to backflow under stirring, and reaction 4h is cooled to 10 ℃, removes by filter filter residue.The filtrate evaporate to dryness and reclaim the solvent trichloromethane after, add the HCl solution 500mL of 2mol/L in the resistates, in 40 ℃ of stirring reaction 0.5h, filter, a little washing with alcohol of filter cake is after the drying, with 300mL hexanaphthene recrystallization, obtain R-(+)-3-chlorobenzene propyl alcohol elaboration 6g.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 57~59 ℃, specific rotation α 19=+25 °, molecular weight is 170.64 after testing.。
Embodiment 13:
With ethylene dichloride 350mL, S-(-)-N-methylhistidine ethyl ester 15g, KBH 44.5g, Zinc Chloride Anhydrous 3.5g, 3-chlorophenyl acetone 12g adds in the three-necked bottle together, is heated to backflow under stirring, and reaction 8h after reaction finishes, is cooled to room temperature, removes by filter filter residue.The filtrate evaporate to dryness and reclaim solvent after, add the HCl solution 300mL of 3mol/L in the resistates, stirring reaction 1h filters, till filter cake was washed till pH and is neutrality with clear water, drying with 300mL hexalin recrystallization, obtained R-(+)-about 7g of 3-chlorobenzene propyl alcohol elaboration.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 56~58 ℃, specific rotation α 19=+25 °.
Embodiment 14
With dimethyl formamide 300mL, S-(-)-Histidine methyl esters 18g, NaBH 411g, Zinc Chloride Anhydrous 2g, 3-chlorophenyl acetone 12g adds in the three-necked bottle together, is heated to backflow under stirring, and reaction 14h is cooled to room temperature, removes by filter filter residue.The HCl solution 100mL that adds 3mol/L in the filtrate, in 10 ℃ of stirring reaction 0.5h, standing demix, branch vibration layer, solvent layer is with 2% NaHCO 3Solution 200mL washing 2 times, difference standing demix and branch vibration layer, solvent layer is used the clear water repetitive scrubbing again, is neutrality until the water layer of telling.With the solvent layer evaporate to dryness and after reclaiming the solvent dimethyl formamide, add the 200mL pimelinketone in the resistates, obtain R-(+)-about 7g of 3-chlorobenzene propyl alcohol elaboration behind the recrystallization.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 56~58 ℃, specific rotation α 19=+25 °.
Embodiment 15:
With tetrahydrofuran (THF) 300mL, S-(-)-N, N-dimethyl Histidine phenyl ester 21.2g, KBH 46g, Zinc Chloride Anhydrous 1.5g, 3-chlorophenyl acetone 13g adds in the three-necked bottle together, is heated to backflow under stirring, and reaction 8h is cooled to room temperature, removes by filter filter residue.The HCl solution 100mL that adds 3mol/L in the filtrate, in 5 ℃ of stirring reaction 0.5h, standing demix, branch vibration layer, solvent layer clear water repetitive scrubbing is neutrality until the water layer of telling.With the solvent layer evaporate to dryness and after reclaiming solvents tetrahydrofurane, add 200mL acetone in the resistates, recrystallization obtains R-(+)-about 3.2g of 3-chlorobenzene propyl alcohol elaboration.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 56~58 ℃, specific rotation α 19=+25 °.
Embodiment 16:
With tetrahydrofuran (THF) 200mL, S-(-)-N-methyl-N-ethyl methyl methionine 14g, KBH 44g, Zinc Chloride Anhydrous 1.2g, 3-chlorophenyl acetone 12g adds in the three-necked bottle together, is heated to backflow under stirring, and reaction 10h is cooled to room temperature, removes by filter filter residue.The NaOH solution 200mL that adds 2mol/L in the filtrate, violent stirring 0.5h, standing demix, branch vibration layer, solvent layer clear water repetitive scrubbing is neutrality until the water layer of telling.With the solvent layer evaporate to dryness and after reclaiming solvents tetrahydrofurane, add the 360mL hexanaphthene in the resistates, recrystallization obtains R-(+)-about 2.5g of 3-chlorobenzene propyl alcohol elaboration.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 57~58 ℃, specific rotation α 19=+25 °.
Embodiment 17
Get dimethyl formamide 200mL, S-(-)-methionine(Met) phenyl ester 20g, KBH 44g, anhydrous stannic chloride 2g, 3-chlorophenyl acetone 13g adds in the three-necked bottle together, is heated to backflow under stirring, and reaction 8h is cooled to room temperature, removes by filter filter residue.The HCl solution 300mL that adds 2mol/L in the filtrate, violent stirring 0.5h, standing demix, branch vibration layer, solvent layer clear water repetitive scrubbing is neutrality until the water layer of telling.With the solvent layer evaporate to dryness and after reclaiming the solvent dimethyl formamide, add the 400mL hexanaphthene in the resistates, recrystallization obtains R-(+)-about 1.5g of 3-chlorobenzene propyl alcohol elaboration.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 56~58 ℃, specific rotation α 19=+25 °.
Embodiment 18
With dimethyl formamide 150mL, S-(-)-N-methyl-methionine(Met) phenyl ester 22.5g, NaBH 45g, Zinc Chloride Anhydrous 0.8g, 3-chlorophenyl acetone 17g adds in the three-necked bottle together, is heated to backflow under stirring, and behind the reaction 8h, is cooled to room temperature, removes by filter filter residue.Add the HCl solution 200mL of 2mol/L in the filtrate, be heated to 40 ℃ slightly, stir 0.5h, filter, filter cake is washed till neutrality with clear water, after the drying, with 400mL methylene dichloride recrystallization, obtains R-(+)-about 7g of 3-chlorobenzene propyl alcohol elaboration.
The fusing point mp of the R-(+) that obtains-3-chlorobenzene propyl alcohol is 56~58 ℃, specific rotation α 19=+25 °.
Embodiment 19
Prepare R-(-)-3-(1-naphthyloxy)-1-phenyl-1-propyl alcohol by R-(+)-3-chlorobenzene propyl alcohol
Get the 32g methyl naphthol and be dissolved in the 100mL tetrahydrofuran (THF), make solution A, 34gR-(+)-3-chlorobenzene propyl alcohol is dissolved in the 100mL tetrahydrofuran (THF), makes solution B; 9g solid NaOH and 300mL tetrahydrofuran (THF) are added in the three-necked bottle, heating reflux reaction 2h is cooled to 5 ℃, adds solution A, be warming up to 10 ℃ of reaction 10h, add solution B then, be heated to backflow, reaction 50h, be cooled to and do not reflux, reaction solution is poured in the 600mL frozen water, slowly stirred 1h, separate out crystallization.Filter, filter cake is washed till neutrality with clear water, gets crude product after the drying, with crude product hexanaphthene recrystallization, obtains R-(-)-3-(1-naphthyloxy)-1-phenyl-1-propyl alcohol white solid 20g, and recording product fusing point mp is 76~78 ℃.
Prepare S-(+)-N by R-(-)-3-(1-naphthyloxy)-1-phenyl-1-propyl alcohol, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride
Get R-(-)-3-(1-naphthyloxy)-1-phenyl-1-propyl alcohol 42g, triethylamine 30g, 40% dimethylamine solution 150mL, dimethyl formamide 300mL adds in the three-necked bottle together, in 40 ℃ of reaction 40h, after reaction finishes, reclaim solvent, add the NaOH solution 270mL of 1mol/L in the resistates, make pH, stir 1h in 3 ℃ to strong basicity, separate out solid, filtration obtains S-(+)-N, and N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine crude product adds crude product in the 300ml ethyl acetate, stir and drip the about 120ml of ethyl acetate/hydrogenchloride (saturated) solution down, react 2h down at 5 ℃, filter and obtain S-(+)-N, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride crude product, crude product is used again the Virahol recrystallization of 10 times of amounts, obtain S-(+)-N, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride elaboration, yield is about 35%.
Embodiment 20
Prepare R-(-)-3-(1-naphthyloxy)-1-phenyl-1-propyl alcohol by R-(+)-3-chlorobenzene propyl alcohol
In the 500mL three-necked bottle, add the 300mL dimethyl formamide successively, 70gR-(+)-3-chlorobenzene propyl alcohol, 26g solid KOH and 64g methyl naphthol, under the backflow situation, react 14h, after reaction finishes, be cooled to 80 ℃, reactant is slowly poured in the 1500mL frozen water, under 2 ℃, stir 0.5h, separate out solid, filter and obtain crude product, according to crude product: the ratio ether recrystallization of ether=1: 20, obtain R-(-)-3-(1-naphthyloxy)-1-phenyl-1-propyl alcohol elaboration 75g, yield is 67%, and product fusing point mp is 76~78 ℃.
Prepare S-(+)-N by R-(-)-3-(1-naphthyloxy)-1-phenyl-1-propyl alcohol, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride
The product 40g of step reaction in three-necked bottle, adding respectively, pyridine 15g, triethylamine 20g, tetrahydrofuran (THF) 360mL, at the dimethylamine gas of 0 ℃ of feeding through the dry mistake of Calcium Chloride Powder Anhydrous, the 1h that ventilates approximately is in 40 ℃ of reaction 12h, reclaim under reduced pressure tetrahydrofuran (THF), the NaOH solution 170mL that adds 1mol/L in the resistates, regulate pH=13, normal temperature stirs 0.5h down, obtains yellow crystal, obtain S-(+)-N after the filtration, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine crude product is dissolved in crude product in the 300mL hexanaphthene, feeds dry hydrogen chloride gas, till not absorbing, in 0 ℃ of following reaction 2h, filtering and obtaining fusing point mp is S-(+)-N of 175~178 ℃, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride crude product, crude product is used again the Virahol recrystallization of 10 times of amounts, obtain S-(+)-N, N-dimethyl-α-[2-(naphthyloxy) ethyl] benzene methanamine hydrochloride elaboration, yield is about 57%.

Claims (11)

1, the preparation method of R-(+)-3-chlorobenzene propyl alcohol is that the levo form with chiral amino acid derivative is a catalyzer, by 3-chlorophenyl acetone and NaBH 4Or KBH 4The directly synthetic R-(+) of reaction-3-chlorobenzene propyl alcohol.
2, the preparation method of R-according to claim 1 (+)-3-chlorobenzene propyl alcohol, the levo form that it is characterized in that described chiral amino acid derivative is meant a kind of in left-handed Isoleucine derivative, levoproline derivative, Try derivative, left-handed cystine derivatives, l-histidine derivative, the L-Methioine derivative.
3, the preparation method of R-according to claim 2 (+)-3-chlorobenzene propyl alcohol is characterized in that described left-handed Isoleucine derivative is meant the compound of general formula (I) expression:
Figure A2007100615100002C1
In the formula:
R1 and R2 are H, C independently of one another 1~C 4Alkyl, phenyl or tolyl;
R3 and R4 are H or C independently of one another 1~C 4Straight chained alkyl.
4, the preparation method of R-according to claim 2 (+)-3-chlorobenzene propyl alcohol is characterized in that described levoproline derivative is meant the compound of general formula (II) expression:
Figure A2007100615100002C2
In the formula:
R1 and R2 are H, C independently of one another 1~C 4Alkyl, phenyl or tolyl;
R3 is H or C 1~C 4Straight chained alkyl.
5, the preparation method of R-according to claim 2 (+)-3-chlorobenzene propyl alcohol is characterized in that described Try derivative is meant the compound of general formula (III) expression:
Figure A2007100615100002C3
In the formula:
R1, R2, R3 and R4 are H, C independently of one another 1~C 4Alkyl, phenyl or tolyl;
R5 is H or C 1~C 4Straight chained alkyl.
6, the preparation method of R-according to claim 2 (+)-3-chlorobenzene propyl alcohol is characterized in that described left-handed cystine derivatives is meant the compound of general formula (IV) expression:
Figure A2007100615100003C1
In the formula:
R1 is methyl, ethyl or phenyl;
R2 is H or C 1~C 4Alkyl.
7, the preparation method of R-according to claim 2 (+)-3-chlorobenzene propyl alcohol is characterized in that described l-histidine derivative is meant the compound that logical formula V is represented:
Figure A2007100615100003C2
In the formula:
R1 is methyl, ethyl or phenyl;
R2 and R3 are H or C independently of one another 1~C 4Straight chained alkyl;
8, the preparation method of R-according to claim 2 (+)-3-chlorobenzene propyl alcohol is characterized in that described L-Methioine derivative is meant the compound of general formula (VI) expression:
Figure A2007100615100003C3
In the formula:
R1 is methyl, ethyl or phenyl;
R2 and R3 are H or C independently of one another 1~C 4Straight chained alkyl;
9, the preparation method of R-according to claim 1 (+)-3-chlorobenzene propyl alcohol is characterized in that the levo form with chiral amino acid derivative is a catalyzer, by 3-chlorophenyl acetone and NaBH 4Or KBH 4Mol ratio according to 1: 0.5~5 is reacted in the anhydrous solvent of Zinc Chloride Anhydrous or anhydrous stannic chloride, preparation R-(+)-3-chlorobenzene propyl alcohol.
10, the preparation method of R-according to claim 9 (+)-3-chlorobenzene propyl alcohol is characterized in that described anhydrous solvent is a kind of in dimethyl sulfoxide (DMSO), dimethyl formamide, tetrahydrofuran (THF), ethylene dichloride, the trichloromethane.
11, the preparation method of R-according to claim 1 (+)-3-chlorobenzene propyl alcohol, the mol ratio that it is characterized in that 3-chlorophenyl acetone and chiral amino acid derivative is 1: 0.6~3.
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CN101844966A (en) * 2009-03-23 2010-09-29 上海中康伟业生物科技有限公司 Preparation method of 3-chlorobenzene propyl alcohol
CN102584536A (en) * 2012-01-18 2012-07-18 广西新晶科技有限公司 Method for asymmetrically catalyzing and synthesizing (R)-(+)-3-chlorine-phenylpropanol
US8546615B2 (en) 2009-11-13 2013-10-01 Symed Labs Limited Solid dapoxetine
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CN106317024A (en) * 2016-08-19 2017-01-11 上海艾康睿医药科技有限公司 Crizotinib intermediate, preparation method and crizotinib preparation method
CN108383703A (en) * 2018-03-30 2018-08-10 南京哈柏医药科技有限公司 A kind of 3 '-chlorobenzene propyl alcohol synthesis technologies
CN112194558A (en) * 2020-11-26 2021-01-08 阿里生物新材料(常州)有限公司 Synthetic method of 2-fluoro-3-methyl-4- (trifluoromethyl) benzylamine hydrochloride

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101844966A (en) * 2009-03-23 2010-09-29 上海中康伟业生物科技有限公司 Preparation method of 3-chlorobenzene propyl alcohol
US8546615B2 (en) 2009-11-13 2013-10-01 Symed Labs Limited Solid dapoxetine
CN102584536A (en) * 2012-01-18 2012-07-18 广西新晶科技有限公司 Method for asymmetrically catalyzing and synthesizing (R)-(+)-3-chlorine-phenylpropanol
CN102584536B (en) * 2012-01-18 2014-06-11 广西新晶科技有限公司 Method for asymmetrically catalyzing and synthesizing (R)-(+)-3-chlorine-phenylpropanol
CN104496830A (en) * 2015-01-15 2015-04-08 安润医药科技(苏州)有限公司 Dapoxetine hydrochloride synthetic method
CN106317024A (en) * 2016-08-19 2017-01-11 上海艾康睿医药科技有限公司 Crizotinib intermediate, preparation method and crizotinib preparation method
CN108383703A (en) * 2018-03-30 2018-08-10 南京哈柏医药科技有限公司 A kind of 3 '-chlorobenzene propyl alcohol synthesis technologies
CN108383703B (en) * 2018-03-30 2021-08-03 兰州紫东药业有限公司 3' -chlorophenylpropanol synthesis process
CN112194558A (en) * 2020-11-26 2021-01-08 阿里生物新材料(常州)有限公司 Synthetic method of 2-fluoro-3-methyl-4- (trifluoromethyl) benzylamine hydrochloride
CN112194558B (en) * 2020-11-26 2022-05-10 阿里生物新材料(常州)有限公司 Synthetic method of 2-fluoro-3-methyl-4- (trifluoromethyl) benzylamine hydrochloride

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