CN104447713B - The preparation method of afatinib compound - Google Patents

The preparation method of afatinib compound Download PDF

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CN104447713B
CN104447713B CN201410658194.4A CN201410658194A CN104447713B CN 104447713 B CN104447713 B CN 104447713B CN 201410658194 A CN201410658194 A CN 201410658194A CN 104447713 B CN104447713 B CN 104447713B
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compound
formula
reaction
afatinib
molar ratio
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CN104447713A (en
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陈庆财
赵俊
赵小伟
潘迅
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Nanjing Hairun Pharmaceutical Co ltd
Jiangsu Aosaikang Pharmaceutical Co Ltd
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Nanjing Hairun Pharmaceutical Co Ltd
Jiangsu Aosaikang Pharmaceutical Co Ltd
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    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D405/00Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
    • C07D405/02Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
    • C07D405/12Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a chain containing hetero atoms as chain links
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02Phosphorus compounds
    • C07F9/547Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
    • C07F9/6558Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom containing at least two different or differently substituted hetero rings neither condensed among themselves nor condensed with a common carbocyclic ring or ring system
    • C07F9/65586Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom containing at least two different or differently substituted hetero rings neither condensed among themselves nor condensed with a common carbocyclic ring or ring system at least one of the hetero rings does not contain nitrogen as ring hetero atom

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Abstract

The present invention provides a kind of new method of preparation afatinib compound, the raw material used and reagent have the advantages of at low cost, chemical property is stable, convenient for long-term storage;And impurity cis-isomer content is extremely low in the afatinib compound prepared.

Description

The preparation method of afatinib compound
Technical field
The present invention is field of medicinal chemistry, more particularly to afatinib compound and one kind of maleic acid Afatinib New preparation process.
Background technique
Maleic acid Afatinib (Afatinib dimaleate) is a kind of tyrosine kinase inhibitor.In July, 2013 by U.S. FDA approval listing, trade name GILOTRIF, as first-line treatment drug for treating EGF-R ELISA (EGFR) Metastatic Nsclc (NSCLC) patient of the missing of exons 19 or exon 21 (L858R) substitution mutation.
Afatinib compound (1 compound of embodiment (10)) is disclosed in CN1481370A.
A kind of method preparing maleic acid Afatinib is disclosed in CN1867564A, by N4(the chloro- 4- fluoro-phenyl of 3-) -7- The aryl amide that ((S)-tetrahydrofuran -3- base oxygen) quinazoline -4,6- diamines is obtained with the reaction of diethyl phosphine ethyl acetoacetic acid, then same 2- Aminoacetaldehyde (or its acetal) occur Wittig-Horner-Emmons reaction generate Afatinib, then again with maleic acid at Salt.The raw materials used dimethylamino acetaldehyde of the technique, dimethylamino acetal higher cost and it is easy to oxidative degradation, it is difficult to It stores for a long time, is unfavorable for industrialized production, and the technique also needs to provide ar gas environment in process of production.The technique simultaneously Trans double bond is constructed by Wittig-Horner-Emmons reaction, due to stereoselective difference, there are still a small amount of in product Cis-isomer impurity.
Summary of the invention
The present invention provides a kind of new methods of preparation afatinib compound, and the Afatinib obtained by this method Further maleic acid Afatinib obtained, the pharmaceutical composition containing the maleic acid Afatinib.Additionally provide the system New intermediate compound used in standby maleic acid afatinib compound new method.
The new method of preparation afatinib compound provided by the invention, can be realized by following scheme:
(1) Formula IV compound reacts to obtain V compound with Formula VII compound,
(2) Formula V compound reacts in the presence of n-BuLi with formula IV compound obtains formula III compound,
(3) formula III compound passes through NaBH4Reduction obtains Formula II compound,
(4) Formula II compound is restored by NaH and obtains compound of formula I,
Reaction condition is one or more in following conditions in step (1) of the present invention: Formula IV compound and Formula VII chemical combination The reaction dissolvent of object synthesis Formula V compound is preferably chosen from methylene chloride, 1,2- dichloroethanes, chloroform, bis- neoprene of 1,2- One of alkane is a variety of;More preferably methylene chloride.Reaction temperature is preferably room temperature.Reaction time is preferably 1~ 20 hours.The molar ratio of Formula IV compound and Formula VII compound is preferably 1:(0.85~1.15).Room temperature is 10 in the present invention ~30 DEG C, more preferably 15~25 DEG C.
Reaction condition is one or more in following conditions in step (2) of the present invention: Formula V compound and formula IV compound The reaction dissolvent for closing compound of Formula III is preferably chosen from tetrahydrofuran and/or 2- methyltetrahydrofuran;More preferably tetrahydro Furans.Reaction temperature is preferably room temperature.Reaction time is preferably 0.5~4 hour.Formula V compound and formula IV compound Molar ratio is preferably 1:(0.85~1.15).The molar ratio of Formula V compound and n-BuLi is preferably 1:(0.8~1.2).
Reaction condition is one or more in following conditions in step (3) of the present invention: formula III compound is reduced to Formula II The reaction dissolvent of compound is preferably chosen from one of methanol, ethyl alcohol, normal propyl alcohol, isopropanol or a variety of;More preferably first Alcohol and/or ethyl alcohol.Reaction temperature is preferably 55~75 DEG C.Reaction time is preferably 0.5~6 hour.Formula III compound with NaBH4Molar ratio be preferably 1:(1.5~0.5).
Reaction condition is one or more in following conditions in step (4) of the present invention: Formula II compound is reduced to Formulas I Close object reaction dissolvent be preferably chosen from one of N,N-dimethylformamide, DMAC N,N' dimethyl acetamide, dimethyl sulfoxide or It is a variety of;More preferably N,N-dimethylformamide.Reaction temperature is preferably 10~30 DEG C.Reaction time is preferably 0.5 ~6 hours, more preferably 1~6 hour.The molar ratio of Formula II compound and NaH are preferably 1:(1.5~4), more preferably For 1:(2~3).
The present invention also provides obtaining new intermediate compound in the preparation Afatinib new method, Formula II compound or Its salt,
The present invention also provides obtain new intermediate compound, formula III compound in the preparation Afatinib new method Or its salt,
The present invention also provides obtaining new intermediate compound in the preparation Afatinib new method, Formula V compound or Its salt,
The Afatinib prepared by the method for the invention can also further be prepared into pharmaceutically acceptable salt, preferably 2-maleate is made in ground, can be realized by the technical solution recorded in prior art CN1867564A.It is heretofore described Maleic acid Afatinib refer to the 2-maleate of Afatinib.
Pharmaceutical composition can also be further made in maleic acid Afatinib provided by the invention;The system of the composition Dosage form formula can be oral solid formulation or parenteral formulations agent.In the present invention, the composition further includes pharmaceutically Acceptable carrier;Pharmaceutically acceptable carrier be usually those of ordinary skill in the art can according to specific form of medication and Specific choice.It can be with it is well known that technology such as routine granulation, mixing, dissolution, formation capsule, freeze-drying technique manufacture this hair Bright pharmaceutical composition.The present composition can be made to the form for being used for various administration routes, for example, oral administration, vein It is interior etc..Preferably, maleic acid Afatinib provided by the invention can be according to technical solution in prior art CN102056589A The pharmaceutical composition of solid dosage form is made.
(diphenylphosphino)acetic acid and N used in preparation Afatinib new method provided by the invention, N- dimethylamino acetic acid Ethyl ester is to be commercialized obtainable chemicals raw material, and at low cost, chemical property is stablized, convenient for long-term storage.
Present invention process respectively walk it is easy to operate, without the special gas preservation condition such as argon gas, and reaction time mild condition, Technique is smooth, is suitble to industry amplification.
Method provided by the invention prepares the total recovery of maleic acid Afatinib up to 60% or more, has industrialized production Value.
The salt of Afatinib or Afatinib that preparation Afatinib new method provided by the invention obtains is (including but unlimited In maleate) in cis-isomer content it is lower, using routine HPLC methods detect result be not detected.
Detailed description of the invention
The MS map for the Afatinib that Fig. 1 embodiment 5 obtains
The HPLC map for the maleic acid Afatinib that Fig. 2 embodiment 5 obtains
The HPLC map for the maleic acid Afatinib that Fig. 3 is obtained according to the Examples 1 to 3 of CN1867564A
The LC-MS map for the maleic acid Afatinib that Fig. 4 is obtained according to the Examples 1 to 3 of CN1867564A
Specific embodiment
It is further illustrated below by the mode of embodiment, but skilled in the art realises that, following embodiments are not pair The limitation of the scope of the present invention.
The preparation of 1 Formula V compound of embodiment
Phosphorus trichloride (0.5g) is slowly instilled to (diphenylphosphino)acetic acid (2.37g) to be dissolved in 25mL dichloromethane solution, is controlled 0 DEG C of reaction temperature processed.Drop finish 15 DEG C be stirred to react 2 hours after be cooled to 0 DEG C.By triethylamine (1.02g) and 4- [(the chloro- 4- fluorine of 3- Phenyl)-amino] -6- amino -7- ((S)-tetrahydrofuran -3- base oxygroup)-quinazoline (3.41g) is dissolved in bis- chloroethene of 25mL1,2- Above-mentioned solution is slowly instilled in alkane solution, drop finishes, and 25 DEG C are reacted 2 hours.20mL purified water is added after completion of the reaction for TLC monitoring Extracting and demixing, organic phase continue to purify water washing, anhydrous sodium sulfate dry, filtering, filtrate decompression with 20mL to be concentrated into grease, Tetrahydrofuran/isopropyl ether (1:1) 40mL is added and recrystallizes to obtain off-white powder (Formula V compound).
Phosphorus trichloride (0.5g) is slowly instilled to (diphenylphosphino)acetic acid (2.37g) to be dissolved in 25mL chloroform soln, is controlled 0 DEG C of reaction temperature processed.Drop finish 25 DEG C be stirred to react 1.5 hours after be cooled to 0 DEG C.By triethylamine (1.02g) and 4- [(the chloro- 4- of 3- Fluorophenyl)-amino] -6- amino -7- ((S)-tetrahydrofuran -3- base oxygroup)-quinazoline (3.41g) is dissolved in 25mL1,2- dichloro Above-mentioned solution is slowly instilled in butane solution, drop finishes, and 15 DEG C are reacted 8 hours.TLC monitoring after completion of the reaction adds 20mL purified water Enter extracting and demixing, organic phase continues to purify dry water washing, anhydrous sodium sulfate, filtering, filtrate decompression with 20mL to be concentrated into oily Object is added tetrahydrofuran/isopropyl ether (1:1) 40mL and recrystallizes to obtain off-white powder (Formula V compound).
Phosphorus trichloride (0.5g) is slowly instilled to (diphenylphosphino)acetic acid (2.37g) to be dissolved in 25mL dichloromethane solution, is controlled 0 DEG C of reaction temperature processed.Drop finish 20 DEG C be stirred to react 2 hours after be cooled to 0 DEG C.By triethylamine (1.02g) and 4- [(the chloro- 4- fluorine of 3- Phenyl)-amino] to be dissolved in 25mL chloroform molten for -6- amino -7- ((S)-tetrahydrofuran -3- base oxygroup)-quinazoline (3.41g) Above-mentioned solution is slowly instilled in liquid, drop finishes, and 10 DEG C are reacted 16 hours.20mL purified water, which is added, after completion of the reaction for TLC monitoring extracts Take layering, organic phase continues to purify dry water washing, anhydrous sodium sulfate, filtering, filtrate decompression with 20mL to be concentrated into grease, adds Enter tetrahydrofuran/isopropyl ether (1:1) 40mL and recrystallizes to obtain off-white powder (Formula V compound).
The preparation of 2 formula III compound of embodiment
By slowly dropping type V compound (5g) is dissolved in 28mL dry four at 0 DEG C of temperature in n-BuLi (1.5M, 6ml) control In hydrogen tetrahydrofuran solution.Drop finishes, and is cooled to -10 DEG C;Dimethylamino ethyl acetate (1.05g) is instilled in above-mentioned solution, drop finishes, and rises To being stirred at room temperature 0.5 hour, saturated ammonium chloride solution 12mL is added into reaction solution after monitoring end of reaction by TLC, is saturated chlorination Sodium solution 8mL, methylene chloride 12mL extracting and demixing, organic phase anhydrous magnesium sulfate is dry, filters, grease is concentrated under reduced pressure to obtain, and adds Enter tetrahydrofuran/isopropyl ether (1:2) 40mL and recrystallizes to obtain off-white powder (formula III compound).
By slowly dropping type V compound (5g) is dissolved in the dry 2- of 28mL at 0 DEG C of temperature in n-BuLi (1.5M, 6ml) control In methyltetrahydrofuran solution.Drop finishes, and is cooled to -10 DEG C;Dimethylamino ethyl acetate (1.05g) is instilled in above-mentioned solution, Drop finishes, and is warmed to room temperature stirring 4 hours, and saturated ammonium chloride solution 12mL, saturation are added into reaction solution after monitoring end of reaction by TLC Sodium chloride solution 8mL, methylene chloride 12mL extracting and demixing, organic phase anhydrous magnesium sulfate is dry, filters, oily is concentrated under reduced pressure to obtain Object is added tetrahydrofuran/isopropyl ether (1:2) 40mL and recrystallizes to obtain off-white powder (formula III compound).
By slowly dropping type V compound (5g) is dissolved in 28mL dry four at 0 DEG C of temperature in n-BuLi (1.5M, 6ml) control In hydrogen tetrahydrofuran solution.Drop finishes, and is cooled to -10 DEG C;Dimethylamino ethyl acetate (1.05g) is instilled in above-mentioned solution, drop finishes, and rises To being stirred at room temperature 2 hours, saturated ammonium chloride solution 12mL, saturated sodium-chloride are added into reaction solution after monitoring end of reaction by TLC Solution 8mL, methylene chloride 12mL extracting and demixing, organic phase anhydrous magnesium sulfate is dry, filters, grease is concentrated under reduced pressure to obtain, and is added Tetrahydrofuran/isopropyl ether (1:2) 40mL recrystallizes to obtain off-white powder (formula III compound).
The preparation of 3 Formula II compound of embodiment
Sodium borohydride (0.15g) addition formula III compound (5g) is dissolved in the solution of 50mL methanol, 75 DEG C of heating 0.5 It is cooled to room temperature after hour, 50mL saturated ammonium chloride solution is added, vacuum distillation removes partial solvent, and 50mL is added and is saturated chlorination Sodium solution, 80mL methylene chloride extracting and demixing, organic phase anhydrous magnesium sulfate is dry, filtering, is concentrated under reduced pressure, and dichloro is added in residue Methane/normal heptane (1:3) 50mL stirring and crystallizing obtains faint yellow solid (Formula II compound).
Sodium borohydride (0.27g) addition formula III compound (5g) is dissolved in the solution of 50mL isopropanol, 65 DEG C are heated back Stream is cooled to room temperature after 4 hours, and 50mL saturated ammonium chloride solution is added, and vacuum distillation removes partial solvent, and 50mL saturation is added Sodium chloride solution, 80mL methylene chloride extracting and demixing, organic phase anhydrous magnesium sulfate is dry, filtering, is concentrated under reduced pressure, and residue is added Methylene chloride/normal heptane (1:3) 50mL stirring and crystallizing obtains faint yellow solid (Formula II compound).
Sodium borohydride (0.38g) addition formula III compound (5g) is dissolved in the solution of 50mL normal propyl alcohol, 55 DEG C of heating 6 It is cooled to room temperature after hour, 50mL saturated ammonium chloride solution is added, vacuum distillation removes partial solvent, and 50mL is added and is saturated chlorination Sodium solution, 80mL methylene chloride extracting and demixing, organic phase anhydrous magnesium sulfate is dry, filtering, is concentrated under reduced pressure, and dichloro is added in residue Methane/normal heptane (1:3) 50mL stirring and crystallizing obtains faint yellow solid (Formula II compound).
4 compound of formula I of embodiment (Afatinib) preparation
The n,N-Dimethylformamide 30mL that the drying of Formula II compound (5g) is added in sodium hydride (80%, 0.42g) is molten In liquid, 10 DEG C of reaction solution are stirred to react 6 hours, purified water 85mL, saturated sodium chloride solution is added in TLC monitoring after completion of the reaction 20mL, methylene chloride 50mL extract liquid separation, and gained organic phase is dry with anhydrous magnesium sulfate, are concentrated under reduced pressure, and acetic acid is added in residue Ethyl ester/hexahydrotoluene (1:2) 60mL stirring and crystallizing obtains white powdery solids (compound of formula I).
The n,N-dimethylacetamide 30mL that the drying of Formula II compound (5g) is added in sodium hydride (80%, 0.42g) is molten In liquid, 30 DEG C of reaction solution are stirred to react 2 hours, purified water 85mL, saturated sodium chloride solution is added in TLC monitoring after completion of the reaction 20mL, methylene chloride 50mL extract liquid separation, and gained organic phase is dry with anhydrous magnesium sulfate, are concentrated under reduced pressure, and acetic acid is added in residue Ethyl ester/hexahydrotoluene (1:2) 60mL stirring and crystallizing obtains white powdery solids (compound of formula I).
Sodium hydride (80%, 0.42g) is added in the dimethyl sulfoxide 30mL solution of the drying of Formula II compound (5g), it will be anti- 20 DEG C of liquid are answered to be stirred to react 4 hours, purified water 85mL, saturated sodium chloride solution 20mL, dichloro is added in TLC monitoring after completion of the reaction Methane 50mL extracts liquid separation, and gained organic phase is dry with anhydrous magnesium sulfate, is concentrated under reduced pressure, and ethyl acetate/methyl is added in residue Hexamethylene (1:2) 60mL stirring and crystallizing obtains white powdery solids (compound of formula I).
The preparation of 5 maleic acid Afatinib of embodiment
Phosphorus trichloride (4.94g, 0.036mol) is slowly instilled to (diphenylphosphino)acetic acid (23.42g, 0.09mol) to be dissolved in In 250mL anhydrous methylene chloride solution, 0 DEG C of reaction temperature is controlled.Drop finish 20 DEG C be stirred to react 1.5 hours after be cooled to 0 DEG C.It will Triethylamine (10.12g, 0.1mol) and 4- [(the chloro- 4- fluorophenyl of 3-)-amino] -6- amino -7- ((S)-tetrahydrofuran -3- base oxygen Base)-quinazoline (33.73g, 0.09mol) is dissolved in 250mL anhydrous methylene chloride solution and slowly instills above-mentioned solution, and drop finishes, and 20 DEG C reaction 1.5 hours.After completion of the reaction extracting and demixing is added in 200mL purified water by TLC monitoring, and organic phase continues pure with 200mL Change water washing, anhydrous sodium sulfate are dry, filter, filtrate decompression is concentrated into grease, are added tetrahydrofuran/isopropyl ether (1:1) 400mL recrystallizes to obtain off-white powder 52.75g, yield: 94.9%.
N-BuLi (1.5M, 62.5ml) is controlled slowly to instill at interior 0 DEG C of temperature and walks product (52.75g, 0.085mol) It is dissolved in 280mL dry tetrahydrofuran solution.Drop finishes, and is cooled to -10 DEG C;By dimethylamino ethyl acetate (11.15g, 0.085mol) in the above-mentioned solution of instillation, drop finishes, and is warmed to room temperature stirring 1 hour, and TLC adds after monitoring end of reaction into reaction solution Enter saturated ammonium chloride solution 120mL, saturated sodium chloride solution 80mL, methylene chloride 120mL extracting and demixing, organic phase anhydrous slufuric acid Magnesium is dry, filter, grease is concentrated under reduced pressure to obtain, and tetrahydrofuran/isopropyl ether (1:2) 420mL is added and recrystallizes to obtain off-white powder 50.13g, yield: 83.4%.
Intermediate (50.13g, 0.071mol) being walked in sodium borohydride (1.52g, 0.04mol) addition, to be dissolved in 500mL anhydrous It in the solution of ethyl alcohol, is cooled to room temperature after being heated to reflux 1 hour, 500mL saturated ammonium chloride solution is added, be evaporated under reduced pressure removing unit Divide solvent, 500mL saturated sodium chloride solution, 800mL methylene chloride extracting and demixing, the drying of organic phase anhydrous magnesium sulfate, mistake is added Filter is concentrated under reduced pressure, and residue is added methylene chloride/normal heptane (1:3) 500mL stirring and crystallizing and obtains faint yellow solid 46.05g, receives Rate: 92.1%.
The N, N- of the drying of product (46.05g, 0.065mol) will be walked in sodium hydride (80%, 3.9g, 0.13mol) addition In dimethylformamide 300mL solution, reaction 1 hour is stirred at room temperature in reaction solution, purified water is added in TLC monitoring after completion of the reaction 800mL, saturated sodium chloride solution 200mL, methylene chloride 500mL extract liquid separation, and gained organic phase is dry with anhydrous magnesium sulfate, subtracts Pressure concentration, residue are added ethyl acetate/hexahydrotoluene (1:2) 570mL stirring and crystallizing and obtain white powder Afatinib 27.58g, yield: 87.3%.The MS testing result of white powder solid is [M+H]+=486.2 (map is shown in Fig. 1), moisture contains Amount measurement result is 0.8% (Karl_Fischer method, instrument KF870).
Afatinib (20g, 0.041mol) that upper step is obtained, ethyl alcohol 280mL are added in reaction flask, are warming up to 70 DEG C, Maleic acid (9.7g, the 0.084mol) solution & stir for being dissolved in 120mL ethyl alcohol is added.Mixture is cooled to 20 after precipitating crystal DEG C stirring 2 hours, then 0 DEG C stir 3 hours filter.Filter cake is rinsed with ethyl alcohol and is dried under reduced pressure to obtain 27.7g horse at 40 DEG C Come sour Afatinib, yield 94.1%.
Embodiment 6
HPLC detection is carried out to the maleic acid Afatinib that embodiment 5 obtains;HPLC map is shown in Fig. 2.Foundation Examples 1 to 3 carries out reference examples experiment in CN1867564A, carries out HPLC detection to the maleic acid Afatinib of acquisition;HPLC Map is shown in Fig. 3.
HPLC condition are as follows:
Chromatographic column: octadecylsilane chemically bonded silica (Inertsil ODS-SP, 150mm × 4.6mm, 5 μm)
Mobile phase: ammonium acetate buffer (take ammonium acetate 7.7g, water 1000ml is added to make to dissolve, shake up to get): acetonitrile (60: 40)
Flow velocity: 1.0mL/min
Detection wavelength: 252nm
Column temperature: 30 DEG C
Sample volume: 5 μ L
As the result is shown: the chromatographic peak retention time of Afatinib is 10.663 minutes in Fig. 3, and peak area percent is 99.496%;Retention time is that 9.467 minutes chromatographic peaks represent cis-isomer impurity, peak area percent 0.318%; The chromatographic peak that retention time is 1~2 minute is the chromatographic peak of maleic acid.The chromatographic peak retention time of Afatinib is in Fig. 2 10.679 minutes, peak area percent 99.879%;Cis-isomer impurity is not detected;The color that retention time is 1~2 minute Spectral peak is the chromatographic peak of maleic acid.
Carry out reference examples experiment according to Examples 1 to 3 in CN1867564A, the maleic acid Afatinib of acquisition is carried out LC-MS detection;Map is shown in Fig. 4.Abscissa is retention time (min) in Fig. 4;The peak that retention time is 7.060min is cis- different Structure body impurity, the peak that retention time is 8.620min are Afatinib.The MS figure of substance at 7.301min is also shown in Fig. 4 Spectrum is cis-isomer impurity;It shows the MS map of substance at 9.312min, is Afatinib.

Claims (8)

1. a kind of method of afatinib compound shown in preparation formula I, the steps include:
(1) Formula IV compound reacts to obtain V compound with Formula VII compound,
(2) Formula V compound reacts in the presence of n-BuLi with formula IV compound obtains formula III compound,
(3) formula III compound passes through NaBH4Reduction obtains Formula II compound,
(4) Formula II compound is restored by NaH and obtains compound of formula I,
2. according to the method described in claim 1, it is characterized in that Formula IV compound and Formula VII compound synthesis Formula V compound Reaction condition it is one or more in following conditions: reaction dissolvent be selected from methylene chloride, 1,2- dichloroethanes, three chloromethanes One of alkane, 1,2- dichloroetane are a variety of;The molar ratio of Formula IV compound and Formula VII compound be 1:(0.85~ 1.15);Reaction time is 1~20 hour.
3. according to the method described in claim 1, it is characterized in that by Formula V compound and formula IV compound synthesis formula III chemical combination The reaction condition of object is one or more in following conditions: reaction dissolvent is tetrahydrofuran and/or 2- methyltetrahydrofuran;Formula The molar ratio of V compound and formula IV compound is 1:(0.85~1.15);The molar ratio of Formula V compound and n-BuLi is 1: (0.8~1.2);Reaction time is 0.5~4 hour.
4. according to the method described in claim 1, it is characterized in that formula III compound is reduced to the reaction condition of Formula II compound One or more in following conditions: reaction dissolvent is selected from one of methanol, ethyl alcohol, normal propyl alcohol, isopropanol or a variety of;Instead Answering temperature is 55~75 DEG C;Formula III compound and NaBH4Molar ratio be 1:(1.5~0.5);Reaction time is 0.5~6 small When.
5. according to the method described in claim 1, it is characterized in that Formula II compound is reduced to the reaction condition choosing of compound of formula I One or more from following conditions: reaction dissolvent is selected from N,N-dimethylformamide, DMAC N,N' dimethyl acetamide, dimethyl sulfoxide One of or it is a variety of;Reaction temperature is 10~30 DEG C;The molar ratio of Formula II compound and NaH are 1:(1.5~4);When reaction Between be 0.5~6 hour.
6. a kind of method for preparing maleic acid Afatinib, it is characterised in that by method according to any one of claims 1 to 5 Afatinib is prepared, obtains maleic acid Afatinib at salt with maleic acid.
7. Formula II compound or its salt,
8. formula III compound or its salt,
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