CN102020574B - Derivant of propofol γ-aminobutyric acid ester and preparation method thereof - Google Patents

Derivant of propofol γ-aminobutyric acid ester and preparation method thereof Download PDF

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CN102020574B
CN102020574B CN200910190856.9A CN200910190856A CN102020574B CN 102020574 B CN102020574 B CN 102020574B CN 200910190856 A CN200910190856 A CN 200910190856A CN 102020574 B CN102020574 B CN 102020574B
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organic solvent
acid
propofol
halogen
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李勤耕
王涛
徐绍杰
甘永军
霍立
肖兵
沈谊
全继平
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Zhong Shanwanhan Pharmaceutical Technology Co Ltd
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Abstract

The invention discloses water soluble compound (II) that the derivant of propofol gamma aminobutyric acid ester and these derivants become salt to be formed with acid and preparation method thereof.The present invention is that raw material obtains above-claimed cpd (II) with propofol (I).Such water soluble compound has logical formula (II),

Description

Derivant of propofol γ-aminobutyric acid ester and preparation method thereof
Technical field
The present invention relates to derivant of propofol γ-aminobutyric acid ester and preparation method thereof.
Background technology
Propofol (2,6-Bis(1-methylethyl)phenol, propofol), for fugitive general intravenous anesthesia medicine, onset is rapid, without substantially Accumulation, revives fast and complete, and its injection is clinically for induction and the maintenance of general anesthesia.But because in its water, dissolubility is very Little and clinic can only be applied to the form of Emulsion.But Emulsion has the disadvantages that 1, physical stability is poor;2, due to bigger Droplet size may cause thromboembolism;3, injection causes pain;4, it is only capable of mixing with minority injectable product selectivity before medication Close;5, Emulsion is prone to bacterial growth;6, heart aspect toxic and side effects etc. is easily caused.Disadvantage mentioned above limits 2,6-diisopropyl benzene The use of phenol (see 1, Propofol and bradycardia:causation, frequency and severity.British Journal of Anaesthesia 1997;78:642;Apotential mechanism of propofol-induced pain on injection based on studiesusing nafamostat Mesilate.British Journal of Anaesthesia.83:397.1999;2, McLeond G, Dick J, Wallis C, et al.Propofol 2% in critically ill patients:effecton lipids.Crit Care Med 1997;25:1975-81;3、POSTOPERATIVEINFECTIONS TRACED TO CONTAMINATION OF AN INTRAVENOUSANESTHETIC, PROPOFOL.N Engl J Med 1995;333:147-54;4、POSTOPERATIVE INFECTIONS TRACED TO CONTAMINATION OF ANINTRAVENOUS ANESTHETIC, PROPOFOL.N Engl J Med1995;333:147-54;5、Propofol-Induced Anaphylactoid Reaction DuringAnesthesia for Cardiac Surgery。Journal of CardiothoracicandVascularAnesthesia, Vol 14, No 2 (April), 2000:pp 200-201;6、 Propofol-infusion syndrome in shildren.The LANCET.VOL353.1999,1117).For a long time, People always strive to propofol is carried out structural modification, have good aqueous solubility to obtaining and keep propofol effect Prodrug.
Trapani in 1998 et al. discloses them first and (sees about the result of study of water-soluble prodrugs of propofol International Journal of Pharmaceutics, 1998,175:195-204).This article discloses 8 propofol Derivant, wherein 7 derivants can form water soluble compound with acid.Due to the 2 of propofol hydroxyl place phenyl ring, each on 6-position Being associated with an isopropyl, have bigger steric hindrance, the most in vivo, carboxy-lesterase is difficult near the designed conjunction of Trapani et al. The ester carbonyl group become, thus be difficult to by enzyme hydrolysis.Trapani et al. points out in conclusion, " although having in acid condition well Water solublity, but owing to there being good stability in the homogenised tissue of blood plasma and brain ", thus traditional prodrug can not be developed into.
Hendler in 1999 et al. (seeing Water-soluble prodrugs of propofol, WO9958555) is public Cloth propofol hydroxyl is by phosphoric acid direct esterification or by some derivants of aliphatic dicarboxylic acid mono-esterification.Also it is because propofol to divide Isopropyl steric hindrance problem in son, esterase is difficult to hydrolyze the ester bond of these compounds, still can not develop into prodrug.
2003, Altomare et al. (saw Highly water-soluble derivatives of Theanesthetic agent propofol:in vitro and in vivo evaluation of cyclic amino Acidesters, European Journal of Pharmaceutical Sciences 2003,20:17-26) disclose number The propofol prodrugs of individual cyclic amino acid esters, it is believed that the L-PROLINE ester of propofol may develop into prodrug, but does not has follow-up report Road.
2005, there is document to disclose a series of multistage prodrug and (see Preparation ofaminoacid-derived Prodrugs of propofol, US 2005004381;Aromatic prodrugsof propofol, their Preparation, compositions, and therapeutic uses WO2005023204), but these prodrugs prepare ten Divide trouble.
2006, Li Qingeng et al. disclosed the prodrug derivant of a series of propofol amino-acid ester.But these compounds There is shortcoming in various degree, make troubles to clinical practice.
In propofol prodrugs is studied, the Fospropofol of most successful Stella of being et al. report (sees Water Soluble Prodrugs of Hindered Alcohols, US6451776), the most push city as endoscope's medication ?.But there is a defect the biggest in this medicine, can discharge the formaldehyde that toxicity is the biggest, see below before discharging former medicine the most in vivo Formula:
In view of the foregoing, it is necessary to propofol prodrugs is improved.
Summary of the invention
It is an object of the invention to provide the hydroxyl utilized in propofol, become deriving containing amine by chemical reaction Thing, recycling amine becomes salt, the method preparing water solublity propofol γ-aminobutyric acid ester type compound with acid.Some of them Compound by injection enter internal after can quickly hydrolyze and discharge propofol, produce anaesthetic effect, overcome propofol poorly water-soluble Shortcoming.
The formula of the compound that the present invention relates to is
Wherein R=H, methyl, ethyl, n-pro-pyl, isopropyl, normal-butyl or isobutyl group;HB refers to can be as medicinal nothing The acid of machine hydrochlorate, phosphoric acid, sulphuric acid or carbonic acid;Or can as medicinal organic acid acetic acid, lactic acid, methanesulfonic acid, succinic acid, citric acid or Malic acid.
Its synthetic method specifically includes:
Method A: react formation ester in organic solvent A with γ-halo butyryl halogen by propofol (I), can add in reaction Enter pyridine, DMAP or tertiary amine catalyst or go acid agent, reaction temperature-78 DEG C-backflow;Again in organic solvent A with containing ammonia or The compound of primary amine replaces halogen and forms nitrogenous thing, reaction temperature-20 DEG C-50 DEG C;Then become with corresponding acid in solvent B Salt, here, solvent B can be water or be organic solvent A, if solvent B is water, can obtain compound by lyophilization (II);If by organic solvent A, the crystallization of gained can be dried to obtain compound (II) by filtering under decompression or normal pressure.
Method B: by propofol (I) in organic solvent A with γ-halo butanoic acid at DCC/DMAP, or other are lived accordingly Property material effect under reaction formed halogen ester, reaction temperature-20 DEG C-50 DEG C;Again with the change containing ammonia or primary amine in organic solvent A Compound replaces halogen and forms nitrogenous thing, reaction temperature-20 DEG C-50 DEG C;Then in solvent B with corresponding acid become salt, here, Solvent B can be water or be organic solvent A, if solvent B is water, can obtain compound (II) by lyophilization;If with having Machine solvent orange 2 A, the crystallization of gained can be dried to obtain compound (II) by filtering under decompression or normal pressure.
Method C: by propofol (I) in organic solvent A with γ-Cbz-aminobutyric acid or derivatives thereof at DCC/DMAP, Or reaction forms ester, reaction temperature-20 DEG C-50 DEG C under other corresponding active substance effects;Then in organic solvent C, Pd-C (5 or 10%)/H2Sloughing Cbz under effect, finally become salt with corresponding acid in solvent B, here, solvent B can be Water or be organic solvent A, if solvent B is water, can obtain compound (II) by lyophilization;If with organic solvent A, gained Crystallization can by filter, decompression or normal pressure under be dried to obtain compound (II).
Method D: by propofol (I) in organic solvent A with γ-Boc-aminobutyric acid or derivatives thereof at DCC/DMAP, Or reaction forms ester, reaction temperature-20 DEG C-50 DEG C under other corresponding active substance effects;Then it is passed through in organic solvent A HCl, obtains compound (II).
Method E: propofol (I) carboxylic acid halides with γ-Cbz-aminobutyric acid or derivatives thereof in organic solvent A is reacted, Also formation ester, reaction temperature-20 DEG C-50 can be reacted under pyridine or DMAP or tertiary amine, or other corresponding active substance effects ℃;Then in organic solvent C, at H2Cbz is sloughed under/Pd-C (5 or 10%) effect, finally sour with corresponding in solvent B Becoming salt, here, solvent B can be water or be organic solvent A, if solvent B is water, can obtain compound by lyophilization (II);If by organic solvent A, the crystallization of gained can be dried to obtain compound (II) by filtering under decompression or normal pressure.
It is significant, good water-soluble that the salt (II) of part propofol γ-aminobutyric acid ester of the present invention has fertilising Property, they decomposable asymmetric choice net in rabbit plasma discharge propofol, and mouse experiment shows have certain anesthetic action.
The fusing point of various salt of propofol γ-aminobutyric acid ester, dissolubility and corresponding pH value
Part of compounds in the present invention, on the premise of not changing the pharmacologically active that propofol is intrinsic, passes through chemical reaction Obtain water soluble compound, it is intended to reduce toxic and side effects.
Detailed description of the invention
Embodiment 1: the synthesis of propofol γ-aminobutyric acid ester hydrochloride
1. propofol γ-Boc-aminobutyric acid ester: by Boc-NHCH2CH2CH2COOH 2.12g, DCC1.16g, in room temperature Under be dissolved in the anhydrous CH of 20ml2Cl2In, stirring is lower adds propofol 1g and 0.34gDMAP, normal-temperature reaction 12h, reacts to propofol Substantially completely, filtering, filtrate water is washed till neutrality, organic layer anhydrous Na2SO4It is dried overnight.Filter, fling to CH2Cl2, obtain light Yellow oil.
2. propofol γ-aminobutyric acid ester hydrochloride: by embodiment 1 gained grease 10mlCH2Cl2Dissolve, be passed through HCl gas, stirs 30min, flings to CH2Cl2, obtain faint yellow semi-solid thing, dissolve with ethyl acetate 5ml, add ether knot Crystalline substance, obtains white solid 1.34g, fusing point: 137.2-138.6 DEG C, purity 97.5% (HPLC), yield 70%.
Embodiment 2: propofol N-methyl-γ-aminobutyric acid ester hydrochloride synthesis (Boc protects route)
1. propofol N-Boc-N-methyl-γ-aminobutyric acid ester: 4.66g γ-N-Boc-N-methylaminobutyric acid is dissolved in 40ml CH2Cl2In, adding DCC7.98g and DMAP1.8g, stirring is lower adds 3.44g propofol, room temperature reaction 60 hours.Cross Filtering, filtrate is washed with dilute hydrochloric acid, 5% sodium carbonate liquor, saturated common salt aqueous solution successively, and organic stratification anhydrous sodium sulfate is dried, Filtering, filtrate is concentrated to give grease.
2. propofol N-methyl-γ-aminobutyric acid ester hydrochloride: by above-mentioned propofol N-Boc-N-methyl-gamma-amino fourth Acid esters grease is dissolved in 50ml ethyl acetate, is passed through HCl gas 1h, concentrating under reduced pressure, adds ether to precipitation completely in residual liquid, Filtering, obtain white solid, with methanol/petroleum ether/ethyl ether system recrystallization, drying under reduced pressure obtains 3.13g white solid, yield 51.74% (in terms of propofol), HPLC measures, and purity is 99.05%.
Embodiment 3: propofol N-methyl-γ-aminobutyric acid ester hydrochloride synthesis (acid chloride route)
1.N-Cbz-N-methyl-gamma-amino butyl chloride: 4.30g N-Cbz-N-methyl-γ-aminobutyric acid is dissolved in 20ml CH2Cl2In, it is slowly added to 4.1g SOCl under ice bath2;React 3 hours.Reaction is finished, and flings to CH2Cl2With unnecessary SOCl2, obtain N- Cbz-N-methyl-gamma-amino butyl chloride.
2. propofol N-Cbz-N-methyl-γ-aminobutyric acid ester: 3.05g propofol is dissolved in 20ml CH2Cl2With 7ml pyrrole In pyridine, under ice bath, it is slowly added to 4.61gN-Cbz-N-methyl-gamma-amino butyl chloride, drips and finish, room temperature reaction 24 hours.Reactant liquor Wash with dilute HCl solution, then use H2O is washed till neutrality, and organic layer anhydrous sodium sulfate is dried, and flings to solvent, residue silica gel Layer post analysis (flowing phase: petroleum ether: ethyl acetate=10: 1), obtains white solid 2.73g, yield 51.49%.
3. propofol N-methyl-γ-aminobutyric acid ester hydrochloride: by above-mentioned for 2.73g propofol N-Cbz-N-methyl-γ- Aminobutyric acid ester is dissolved in the mixed solvent of 10ml methanol and 2ml glacial acetic acid, adds 0.3gPd/C1 (10%), is passed through under stirring Hydrogen, reacts 6 hours.Filter, decompression remove solution, residue is dissolved in 10ml dilute hydrochloric acid (wherein the amount of HCl be equivalent to put into The mole of propofol N-Cbz-N-methyl-γ-aminobutyric acid ester), aqueous solution 10ml petroleum ether extraction 3 times, freezing dry Dry, obtain white solid 1.73g, yield 83.5%.HNMR (δ): 1.038~1.193 (12H), 1.951~2.044 (2H), 2.732~2.943 (7H), 3.312~3.445 (3H), 7.129~7.256 (3H), 9.162 (2H).
Embodiment 4
Propofol N--isopropyl-γ-aminobutyric acid ester hydrochloride
1.N-isopropyl-γ-aminobutyric acid: 2g γ-aminobutyric acid be dissolved in 7.2ml acetone and 13ml methanol, adds 0.16g 10% palladium charcoal, is stirred at room temperature down and is passed through hydrogen 24 hours, filters, and filtrate decompression is vacuum dried, and obtains white solid 2.7g, Yield 95%, m.p.:159.2-162.7 DEG C.
2.N-Cbz-N-isopropyl-γ-aminobutyric acid: 2g N-isopropyl-γ-aminobutyric acid (0.0138mol) is dissolved in In the mixed solvent of 8ml water and 24ml methanol, add sodium carbonate 2.4g, be slowly added dropwise Cbz-C1, room temperature reaction 12 hours, fling to Methanol, adds 60ml water and is dissolved by grease, wash with ether, and water layer 1N HCl solution adjusts pH to be about 3, solution acetic acid second Ester extracts, and organic layer anhydrous sodium sulfate is dried, and filters, and decompression volatilizes ethyl acetate, obtains pale yellow oil 1.42g, yield 36.9%.
3.N-Cbz-N-isopropyl-gamma-amino butyl chloride: 1.8g N-Cbz-N-isopropyl-4-Aminobutanoicacid is dissolved in In 20ml dichloromethane, less than 5 DEG C, drip 0.55ml SOCl2, dripping and finish, room temperature reaction 4-6 hour, evaporated under reduced pressure is organic molten Agent, obtains brown oil.
4. propofol N-Cbz-N-isopropyl-4-Aminobutanoicacid ester: 0.5g propofol is dissolved in 1.5ml pyridine, ice bath The cooling lower dropping 10ml dichloromethane solution containing 1.5g N-Cbz-N-isopropyl-4-aminobutyryl chlorine, drips and finishes, be stirred at room temperature React more than 1 hour;Reaction is finished, and addition 1N HCl solution, to about pH3, is washed to neutrality, and anhydrous sodium sulfate is dried organic layer, Filter, fling to solvent, participate in thing column chromatography (silica gel: 200-300 mesh;Flowing phase: petroleum ether: ethyl acetate=20: 1) purification, Decompression volatilizes solvent, obtains grease 0.96g, yield 78.5%.
5. propofol N-isopropyl-γ-aminobutyric acid ester hydrochloride: by 1.3g propofol N-Cbz-N-isopropyl-4-ammonia Base butyrate is dissolved in 10ml acetic acid, adds 0.25g10% palladium charcoal, is passed through hydrogen 3h under room temperature, and reaction is finished, and add water 5ml, mistake Filter, adds solid NaHCO under filtrate ice bath3Producing to bubble-free, ether extraction (15mlX3), ether layer anhydrous sodium sulfate is done Dry, filter, concentration ether to 6ml, under ice bath stirring, drip the diethyl ether solution of saturated HCl, white solid separates out, and filters, room Temperature drying under reduced pressure, obtains white solid 1.25g, yield 46.3%, fusing point 223.9-225.1 DEG C.
(cm-1): 3584,3490,2965,2786,2488,2421,1756,1467,1266,1163;HNMR (δ): 0.921 ~1.195 (12H), 1.247~1.329 (6H), 2.033 (2H), 2.858~2.943 (6H), 3.254 (1H), 7.131~ 7.264 (3H), 9.134 (2H).
Embodiment 5
Propofol prodrug rabbit plasma decomposition experiment result
1, the preparation of need testing solution: it is appropriate that precision weighs following 7 kinds of samples, is dissolved in water and dilutes and make every 1ml and contain The solution of 1mg, shakes all, to obtain final product.
2, chromatographic condition: be chromatographic column with C18 (150*4.6mm, 5 μm), buffers molten with the potassium dihydrogen phosphate of 0.01mol/L Liquid (every 100ml 0.5ml Han triethylamine, phosphoric acid adjusts pH to 3.0)-methanol (36-65) is flowing phase, detects wavelength 210nm, flow velocity For 1.5ml per minute, sample size 100 μ l.
3, blood plasma decomposition experiment method: take in the EP pipe that rabbit whole blood 1ml puts 5ml, uses EDTA-2Na anticoagulant, standby.Accurate Measure each three parts of above-mentioned 7 kinds of solution 0.1ml to be separately added in above-mentioned whole blood, at 38.0 DEG C of shake wells, respectively 2 minutes, 10 Minute and take out whole blood 1 respectively when 20 minutes, add methanol 3ml, vortex 3 minutes, 12000 revs/min 10 minutes, take supernatant Sample introduction, calculates prodrug and the ratio of propofol in area normalization method.Result see table:
Table propofol prodrugs metabolism result in rabbit whole blood
Result: 7 samples all have preferable decomposition rate in rabbit plasma, in 10min, substantially all complete hydrolysis becomes Propofol.
Embodiment 6
Pharmacodynamics in Mice is tested
Laboratory animal: Kun Ming mice 140, male and female half and half, body weight 19-25g.
Experimental drug: take off respectively and state medicine 25mg, is dissolved in 5ml normal saline.
Experimental technique: mice is divided into 14 groups, often group 10, use tail vein injection to be administered, observe whether righting reflex disappears Lose.
Experimental result such as following table:
Table propofol prodrugs test of pesticide effectiveness result

Claims (9)

1. the derivant of propofol γ-aminobutyric acid ester becomes the water soluble compound that salt is formed with acid, it is characterised in that this change Compound has a general formula:
Wherein R=H, methyl, ethyl;HB represents can be as medicinal acid.
The most according to claim 1, the derivant of propofol γ-aminobutyric acid ester becomes the water solublity chemical combination that salt is formed with acid Thing, it is characterised in that: HB refers to can be as medicinal mineral acid hydrochloric acid, phosphoric acid, sulphuric acid or carbonic acid;Or can be as medicinal organic Acid acetic acid, lactic acid, methanesulfonic acid, succinic acid, citric acid or malic acid.
3. the synthetic method of compound described in claim 1 or 2, it is characterised in that the method is:
By propofol (I) more than 3 times in the organic solvent A of weight with more than or equal to the γ-halogen of propofol (I) mole Form ester for butyl chloride reaction, reaction adds pyridine or DMAP or tertiary amine catalyst or goes acid agent, reaction temperature-78 DEG C Reflux temperature;Formed contain described ester organic solvent A more than 3 times of weight replaces halogen with excess of ammonia or primary amine again Nitrogen thing, reaction temperature-20 DEG C 50 DEG C;Then described nitrogenous thing is dissolved in solvent B and becomes salt with corresponding acid HB, finally To compound (II);
Described organic solvent A is halogen-containing organic solvent dichloromethane, chloroform or chlorobenzene;Or the most halogen-containing organic solvent Benzene, toluene, hexane or hexamethylene;Or containing other heteroatomic organic solvent acetonitriles, acetone, DMF, DMSO, THF or ether;
Described solvent B is described organic solvent A or water;When using water as solvent, obtain compound (II) by lyophilization;With institute When stating organic solvent A, the crystallization of gained, by filtering, is dried to obtain compound (II), is dried and carries out under decompression or normal pressure.
4. the synthetic method of compound described in claim 1 or 2, it is characterised in that the method is:
By in the propofol (I) organic solvent A more than 3 times of weight with excess γ-halo butanoic acid in DCC/DMAP effect Lower reaction forms halogen ester, reaction temperature-20 DEG C 50 DEG C;Again by described halogen ester organic solvent A more than 3 times of weight Replace halogen with excess of ammonia or primary amine and form nitrogenous thing;Then described nitrogenous thing is dissolved in solvent B and becomes salt with corresponding acid, Finally obtain compound (II);
Described organic solvent A is halogen-containing organic solvent dichloromethane, chloroform or chlorobenzene;Or the most halogen-containing organic solvent Benzene, toluene, hexane or hexamethylene;Or containing other heteroatomic organic solvent acetonitriles, acetone, DMF, DMSO, THF or ether;
Described solvent B is described organic solvent A or water;When using water as solvent, obtain compound (II) by lyophilization;With institute When stating organic solvent A, the crystallization of gained, by filtering, is dried to obtain compound (II), is dried and carries out under decompression or normal pressure.
5. the synthetic method of compound described in claim 1 or 2, it is characterised in that the method is:
By in the propofol (I) organic solvent A more than 3 times of weight with excess γ-Cbz-aminobutyric acid appropriate The lower reaction of DCC/DMAP effect forms ester, reaction temperature-20 DEG C 50 DEG C;Then by described ester having more than 3 times of weight In machine solvent C, at H2Slough Cbz under/Pd-C effect, finally the ester of the described Cbz of sloughing is dissolved in solvent B and corresponding acid Become salt, obtain compound (II);
Described organic solvent A is halogen-containing organic solvent dichloromethane, chloroform or chlorobenzene;Or the most halogen-containing organic solvent Benzene, toluene, hexane or hexamethylene;Or containing other heteroatomic organic solvent acetonitriles, acetone, DMF, DMSO, THF or ether;
Described solvent B is described organic solvent A or water;When using water as solvent, obtain compound (II) by lyophilization;With institute When stating organic solvent A, the crystallization of gained, by filtering, is dried to obtain compound (II), is dried and carries out under decompression or normal pressure;
Described organic solvent C is the most halogen-containing organic solvent THF, ether, methanol, ethanol, ethyl acetate or acetic acid.
6. the synthetic method of compound described in claim 1 or 2, it is characterised in that the method is:
By in the propofol (I) organic solvent A more than 3 times of weight with excess γ-Boc-aminobutyric acid appropriate The lower reaction of DCC/DMAP effect forms ester, reaction temperature-20 DEG C 50 DEG C;Then described ester is passed through in organic solvent A HCl, obtains compound (II);
Described organic solvent A is halogen-containing organic solvent dichloromethane, chloroform or chlorobenzene;Or the most halogen-containing organic solvent Benzene, toluene, hexane or hexamethylene;Or containing other heteroatomic organic solvent acetonitriles, acetone, DMF, DMSO, THF or ether.
7. the synthetic method of compound described in claim 1 or 2, it is characterised in that the method is:
By the propofol (I) organic solvent A more than 3 times of weight is reacted with excessive γ-Cbz-aminobutyryl halogen, also may be used Under pyridine or DMAP or tertiary amine effect, reaction forms ester, reaction temperature-20 DEG C 50 DEG C simultaneously;Then by described ester 3 In organic solvent C more than times weight, at H2Slough Cbz under/Pd-C effect, finally by slough the ester of Cbz in solvent B with Corresponding acid becomes salt, obtains compound (II);
Described organic solvent A is halogen-containing organic solvent dichloromethane, chloroform or chlorobenzene;Or the most halogen-containing organic solvent Benzene, toluene, hexane or hexamethylene;Or containing other heteroatomic organic solvent acetonitriles, acetone, DMF, DMSO, THF or ether;
Described solvent B is described organic solvent A or water;When using water as solvent, obtain compound (II) by lyophilization;With institute When stating organic solvent A, the crystallization of gained, by filtering, is dried to obtain compound (II), is dried and carries out under decompression or normal pressure;
Described organic solvent C is the most halogen-containing organic solvent THF, ether, methanol, ethyl acetate or acetic acid.
Method the most according to claim 3, it is characterised in that the halogen atom in described halo butyl chloride is chlorine or bromine.
9. the derivant of the propofol γ-aminobutyric acid ester described in claim 1 or 2 is become with acid the water solublity that salt is formed Compound (II) produces the anesthetics of anesthetic action for preparation to animal and people.
CN200910190856.9A 2009-09-14 Derivant of propofol γ-aminobutyric acid ester and preparation method thereof Active CN102020574B (en)

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Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
water-soluble salts of aminoacid esters of the anaesthetic agent propofol;Giuseppe Trapani et al.;《International Journal of Pharmaceutics》;19981231;第175卷;第195-204页 *

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Address before: Guangdong city of Zhongshan province Southern China Nanlang 528451 modern Chinese Medicine City Branch Chong Park No. 2

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