CN107043356B - A kind of preparation method of Erlotinib intermediate - Google Patents
A kind of preparation method of Erlotinib intermediate Download PDFInfo
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- CN107043356B CN107043356B CN201710472253.2A CN201710472253A CN107043356B CN 107043356 B CN107043356 B CN 107043356B CN 201710472253 A CN201710472253 A CN 201710472253A CN 107043356 B CN107043356 B CN 107043356B
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/70—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings condensed with carbocyclic rings or ring systems
- C07D239/72—Quinazolines; Hydrogenated quinazolines
- C07D239/86—Quinazolines; Hydrogenated quinazolines with hetero atoms directly attached in position 4
- C07D239/94—Nitrogen atoms
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- C—CHEMISTRY; METALLURGY
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/70—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings condensed with carbocyclic rings or ring systems
- C07D239/72—Quinazolines; Hydrogenated quinazolines
- C07D239/86—Quinazolines; Hydrogenated quinazolines with hetero atoms directly attached in position 4
- C07D239/88—Oxygen atoms
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
- C07D263/52—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings condensed with carbocyclic rings or ring systems
- C07D263/54—Benzoxazoles; Hydrogenated benzoxazoles
- C07D263/56—Benzoxazoles; Hydrogenated benzoxazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached in position 2
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Abstract
The present invention relates to a kind of preparation methods of Erlotinib intermediate, specifically comprise the following steps:
Description
Technical field
The invention belongs to pharmaceutical synthesis fields, and in particular to a kind of preparation method of Erlotinib intermediate.
Background technique
Erlotinib hydrochloride (Erlotinib Hydrochloride) is that OSI Pharmaceuticals company, the U.S. opens
A kind of tyrosinase inhibitor of hair, current clinic are mainly used for the treatment of non-small cell lung cancer.Its chemical name are as follows: N- (3- second
Alkynes phenyl)-[6,7- bis- (2- methoxy ethoxy)] quinazoline -4- amine hydrochlorate.Chemical structure is as follows:
The synthetic route of Erlotinib is mainly the United States Patent (USP) US5747498A of Pfizer Inc.'s report, synthesizes road
Line is as follows:
In said synthesis route, the synthesis of erlo-4 need to be heated to 160 DEG C or so, and reaction yield is not high, therefore develop
It is a kind of synthesize erlo-4 new method be used for synthesize Erlotinib become research emphasis.
Summary of the invention
The present invention provides a kind of method for synthesizing Erlotinib, it is characterised in that includes the following steps:
(1) compound 1 reacts under conditions of catalytic amount boron trifluoride ether with paraformaldehyde generates compound 2；
(2) compound 2 reacts under catalytic amount tetrabutylammonium bromide and ultrasound condition with ammonium hydroxide generates compound 3；
(3) compound 3 is reacted with thionyl chloride generates compound 4；
(4) compound 4 is reacted with 3-aminophenylacetylene generates Erlotinib.
The method of above-mentioned synthesis Erlotinib, it is characterised in that compound 1 and the molar ratio of paraformaldehyde are in step (1)
1:10-20, reaction temperature are 50-60 DEG C；The ultrasonic reaction time is 5-30min in step (2), and reaction temperature is room temperature, ultrasound
Frequency is 30-50kHz；Step (3) reaction temperature is 60-80 DEG C；Step (4) reaction temperature is 70 DEG C to reflux temperature, solvent
For isopropanol；Organic solvent, described organic solvent preferred DMF, DMA or THF are optionally added in above-mentioned steps (1), (3).
It is provided in another embodiment of the present invention a kind of for synthesizing the intermediate of Erlotinib, it is characterised in that described
Intermediate has structure shown in compound 2:
Another embodiment of the present invention provides midbody compound 2 and is preparing the purposes in Erlotinib.
Another embodiment of the present invention provides purposes of the midbody compound 2 in prepare compound 3.
Another embodiment of the present invention provides a kind of method for preparing midbody compound 2, it is characterised in that including such as
Lower step:
Compound 1 is dissolved in organic solvent, and the boron trifluoride ether of paraformaldehyde and catalytic amount, heating are added at room temperature
50-60 DEG C of reaction 3-5h generates compound 2；Organic solvent preferred DMF, DMA or THF.
Another embodiment of the present invention provides a kind of method for preparing midbody compound 3, it is characterised in that including such as
Lower step:
Compound 2 is added in ammonium hydroxide, the tetrabutylammonium bromide of catalytic amount, ultrasonic 5-30min, generationization are added at room temperature
Close object 3；Supersonic frequency is 30-50kHz.
The above-mentioned method for preparing midbody compound 3, further includes following steps:
Compound 1 is dissolved in organic solvent, the boron trifluoride ether of paraformaldehyde and catalytic amount, heating are added at room temperature
50-60 DEG C of reaction 3-5h generates compound 2；Organic solvent preferred DMF, DMA or THF.
Compared with prior art the present invention has the advantages that
(1) present invention provides a kind of new intermediate for preparing Erlotinib i.e. compound 2, the intermediate can be by compound 1
Under paraformaldehyde, boron trifluoride ether effect, generation midbody compound can be reacted in 50-60 DEG C, agents useful for same is cheap
It is easy to get, reaction condition is mild, and conversion ratio is up to 99%；
(2) present invention is mild by the reaction condition of 2 prepare compound 3 of compound, and the reaction time is short, high conversion rate.
Specific embodiment
For the ease of a further understanding of the present invention, examples provided below has done more detailed description to it.But
It is that these embodiments are only not supposed to be a limitation to the present invention or implementation principle for better understanding invention, reality of the invention
The mode of applying is not limited to the following contents.
Embodiment 1
Weigh Compound 1 (285mg, 1.0mmol) is dissolved in DMF (10mL), at room temperature be added paraformaldehyde (300mg,
10mmol) with the boron trifluoride ether of catalytic amount, 50 DEG C are heated to, is stirred to react, it is complete that TLC detects reaction raw materials (compound 1)
It totally disappeared mistake (about reaction 5h), stop heating and be down to room temperature, reaction solution is poured into ice water (about 100mL), stir 5-10min, take out
Filter cake is filtered to obtain, 20mL acetonitrile is added in filter cake, and 50 DEG C of heating is completely dissolved to solid, is down to crystallizing at room temperature naturally, is filtered, and filter cake is used
Acetonitrile is washed 2 times, is dried in vacuo to obtain white solid 292mg (yield is about 98.9%), as compound 2 (ESI-MS (m/z):
296.11[M+H]+, 318.09 [M+Na]+,1H NMR(400MHz,CDCl3):δ8.23(s,1H,H-2),7.50(s,1H,H-
5),7.18(s,1H,H-8),4.28-4.20(m,8H,CH2×4),3.43(s,3H,CH3O),3.40(s,3H,CH3O))。
Embodiment 2
Weigh Compound 1 (285mg, 1.0mmol) is dissolved in THF (10mL), at room temperature be added paraformaldehyde (600mg,
20mmol) with the boron trifluoride ether of catalytic amount, 60 DEG C are heated to, is stirred to react, it is complete that TLC detects reaction raw materials (compound 1)
It totally disappeared mistake (about reaction 3h), stop heating and be down to room temperature, reaction solution is poured into ice water (about 100mL), stir 5-10min, take out
Filter cake is filtered to obtain, 20mL acetonitrile is added in filter cake, and 50 DEG C of heating is completely dissolved to solid, is down to crystallizing at room temperature naturally, is filtered, and filter cake is used
Acetonitrile is washed 2 times, is dried in vacuo to obtain white solid 293mg (yield is about 99.2%), as compound 2 (structural identification data with
Embodiment 1 is consistent).
Embodiment 3
Weigh Compound 1 (285mg, 1.0mmol) is dissolved in DMF (10mL), at room temperature be added paraformaldehyde (300mg,
10mmol), 50 DEG C are heated to, is stirred to react (about reaction 5h), compound 1 is still principal point in TLC detection display reaction solution, that is, is existed
In the case where boron trifluoride ether is not added, almost react.
Embodiment 4
Weigh Compound 1 (285mg, 1.0mmol) is dissolved in triethyl orthoformate (10mL), and catalytic amount is added at room temperature
P-methyl benzenesulfonic acid stops heating and is down to room temperature, reaction solution is poured into ice water (about after being heated to reflux temperature reaction 4h
100mL), 5-10min is stirred, filter cake is filtered to obtain, 20mL acetonitrile is added in filter cake, and 50 DEG C of heating are completely dissolved to solid, drops naturally
It to crystallizing at room temperature, filters, filter cake is washed 1-2 times with acetonitrile, is dried in vacuo to obtain white solid 186mg (yield is about 63.0%), i.e.,
For compound 2 (structural identification data and embodiment 1 are consistent).
Embodiment 5
Weigh Compound 2 (295mg, 1.0mmol) is placed in ammonium hydroxide (10mL), and the tetrabutyl bromine of catalytic amount is added at room temperature
Change ammonium, ultrasonic reaction 5min, supersonic frequency 50kHz, TLC detection reaction raw materials (compound 2) completely disappears, and uses methylene chloride
It dilutes (30mL), is successively washed with water, saturation NaCl, after organic phase concentration, 15mL acetonitrile is added, 50 DEG C of heating is complete to solid
Dissolution, is down to crystallizing at room temperature naturally, filters, and filter cake washed 2 times with acetonitrile, be dried in vacuo white solid 292mg (yield is about
99.2%), as compound 3 (fusing point: 182 DEG C, ESI-MS and1H NMR and document European Journal of
Medicinal Chemistry, Volume 43, Issue 7, July 2008, Pages 1478-1488 report are consistent).
Embodiment 6
Weigh Compound 2 (295mg, 1.0mmol) is placed in ammonium hydroxide (10mL), and the tetrabutyl bromine of catalytic amount is added at room temperature
Change ammonium, ultrasonic reaction 30min, supersonic frequency 30kHz, TLC detection reaction raw materials (compound 2) completely disappears, and uses dichloromethane
Alkane dilutes (30mL), is successively washed with water, saturation NaCl, after organic phase concentration, 15mL acetonitrile is added, 50 DEG C of heating is complete to solid
Fully dissolved is down to crystallizing at room temperature naturally, filters, and filter cake washed 2 times with acetonitrile, be dried in vacuo white solid 291mg (yield is about
98.9%), as compound 3 (structural identification data and embodiment 5 consistent).
Embodiment 7
Weigh Compound 3 (294mg, 1.0mmol) is dissolved in DMF (1mL), and thionyl chloride (2mL) is added at room temperature, heating
It to 80 DEG C, reacts 4-5 hours, TLC detection reaction raw materials (compound 3) completely disappears, and stops heating, thionyl chloride is evaporated off, adds
Enter a small amount of petroleum ether (1mL) and a large amount of solids occur, petroleum ether is evaporated off, dilute (40mL) with methylene chloride, successively with saturation
NaHCO3, saturation NaCl washing, organic phase dries, filters with anhydrous sodium sulfate, be concentrated, dry yellowish solid (295mg,
Yield be about 94.3%) be compound 4 (HPLC detect purity be 99.1%,1H NMR(DMSO-d6):δ8.88(s,1H),
7.50(s,1H),7.46(s,1H),4.38-4.35(m,4H),3.78-3.75(m,4H),3.37-3.34(m,6H))。
Embodiment 8
Weigh Compound 3 (589mg, 2.0mmol) is dissolved in DMF (2mL), and thionyl chloride (4mL) is added at room temperature, heating
It to 60 DEG C, reacts 4-5 hours, TLC detection reaction raw materials (compound 3) completely disappears, and stops heating, thionyl chloride is evaporated off, adds
Enter a small amount of petroleum ether (1mL) and a large amount of solids occur, petroleum ether is evaporated off, dilute (60mL) with methylene chloride, successively with saturation
NaHCO3, saturation NaCl washing, organic phase dries, filters with anhydrous sodium sulfate, be concentrated, dry yellowish solid (598mg,
Yield be about 95.6%) be compound 4 (it is 99.5% that HPLC, which detects purity, and structural identification data and embodiment 7 are consistent).
Embodiment 9
Weigh Compound 4 (313mg, 1.0mmol) is added in isopropanol (5mL), and 3-aminophenylacetylene is added at room temperature
(200mg) is heated to reflux temperature (solution is gradually clarified in temperature-rise period, has a large amount of white solids to occur later), reacts 3-4
Hour, TLC detection reaction raw materials (compound 4) completely disappears, and stops heating, is down to room temperature, filters, the isopropanol of filter cake heat
Washing 2 times, be dried in vacuo to obtain white solid (395mg), through n-butanol recrystallize Erlotinib sterling (380mg, yield are about
96.6%,1H NMR is consistent with the prior art, 99.5%) it is that HPLC, which detects purity,.
Embodiment 10
Weigh Compound 4 (626mg, 2.0mmol) is added in isopropanol (10mL), and 3-aminophenylacetylene is added at room temperature
(400mg) is heated to 70 DEG C (solution is gradually clarified in temperature-rise period, has a large amount of white solids to occur later), and reaction 3-4 is small
When, TLC detection reaction raw materials (compound 4) completely disappears, and stops heating, is down to room temperature, filters, and the isopropanol of filter cake heat is washed
Wash 2 times, be dried in vacuo to obtain white solid (792mg), through n-butanol recrystallize Erlotinib sterling (750mg, yield are about
99.7%) it is that 95.3%, HPLC, which detect purity,.
Claims (2)
1. a kind of method for preparing midbody compound 3, it is characterised in that include the following steps:
(1)
Compound 1 is dissolved in organic solvent, the boron trifluoride ether of paraformaldehyde and catalytic amount is added at room temperature, heats 50-
60 DEG C of reaction 3-5h generate compound 2；The molar ratio of compound 1 and paraformaldehyde is 1:10-20；Organic solvent be selected from DMF,
DMA or THF；
(2)
Compound 2 is added in ammonium hydroxide, the tetrabutylammonium bromide of catalytic amount is added at room temperature, ultrasonic 5-30min generates compound
3；Supersonic frequency is 30-50kHz.
2. method described in claim 1 is preparing the application in Erlotinib.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557977A (en) * | 2010-12-20 | 2012-07-11 | 浙江海正药业股份有限公司 | Synthesis intermediate of erlotinib and preparation method thereof |
| WO2015019121A1 (en) * | 2013-08-09 | 2015-02-12 | Vichem Chemie Kutató Kft. | Styryl quinazoline derivatives as pharmaceutically active agents |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557977A (en) * | 2010-12-20 | 2012-07-11 | 浙江海正药业股份有限公司 | Synthesis intermediate of erlotinib and preparation method thereof |
| WO2015019121A1 (en) * | 2013-08-09 | 2015-02-12 | Vichem Chemie Kutató Kft. | Styryl quinazoline derivatives as pharmaceutically active agents |
Non-Patent Citations (1)
| Title |
|---|
| 埃罗替尼的合成;孙键，等;《化学通报》;20131231;第76卷(第5期);第451-454页 |
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