CN114181172B - Efficient preparation method of quetiapine fumarate - Google Patents

Efficient preparation method of quetiapine fumarate Download PDF

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CN114181172B
CN114181172B CN202111608959.XA CN202111608959A CN114181172B CN 114181172 B CN114181172 B CN 114181172B CN 202111608959 A CN202111608959 A CN 202111608959A CN 114181172 B CN114181172 B CN 114181172B
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quetiapine
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CN114181172A (en
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黄栋
肖永鹏
李国良
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Zhejiang Supor Pharmaceuticals Co ltd
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    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D281/00Heterocyclic compounds containing rings of more than six members having one nitrogen atom and one sulfur atom as the only ring hetero atoms
    • C07D281/02Seven-membered rings
    • C07D281/04Seven-membered rings having the hetero atoms in positions 1 and 4
    • C07D281/08Seven-membered rings having the hetero atoms in positions 1 and 4 condensed with carbocyclic rings or ring systems
    • C07D281/12Seven-membered rings having the hetero atoms in positions 1 and 4 condensed with carbocyclic rings or ring systems condensed with two six-membered rings
    • C07D281/16[b, f]-condensed
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/41Preparation of salts of carboxylic acids
    • C07C51/412Preparation of salts of carboxylic acids by conversion of the acids, their salts, esters or anhydrides with the same carboxylic acid part
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract

The invention belongs to the technical field of organic synthesis, and particularly relates to a high-efficiency preparation method of quetiapine fumarate. The efficient preparation method of quetiapine fumarate comprises the following steps: the dibenzo [ b, f ] [1,4] thiazepine-11- [10H ] ketone and 1- [2 (2-hydroxy ethoxy) ethyl ] piperazine are subjected to catalytic reaction in a solvent through a copper catalyst for 6-16 hours at 80-120 ℃ to obtain quetiapine free alkali, and after separation, fumaric acid is added to form salt to obtain quetiapine fumarate; the copper catalyst includes a copper compound and an oxidizing agent.

Description

Efficient preparation method of quetiapine fumarate
Technical Field
The invention belongs to the technical field of organic synthesis, and particularly relates to a high-efficiency preparation method of quetiapine fumarate.
Background
Quetiapine fumarate is a new generation of atypical psychosis, first marketed in the united kingdom by Zeneca corporation in 1997, month 11, and clinically used as a first line drug for schizophrenia. Quetiapine fumarate is known as 11- [4- [2- (2-hydroxyethoxy) ethyl ] -1-piperazinyl ] dibenzo [ b, f ] [1,4] thiazepine hemi-fumarate and is prepared by salifying quetiapine with fumaric acid and has the following chemical structural formula:
the literature reports that a number of synthetic routes can be made:
1. european patent EP282236 reports that dibenzo [ b, f ] [1,4] thiazepin-11- (10H) ketone is chlorinated with phosphorus oxychloride and then condensed with piperazine to obtain an intermediate 11-piperazinyl-dibenzo [ b, f ] [1,4] thiazepin, and finally condensed with 2-chloroethoxyethanol and salified with fumaric acid to obtain quetiapine fumarate. The chlorination reaction in the route is a typical dangerous reaction, and phosphorus oxychloride (the use amount is 148 mole times of dibenzo [ b, f ] [1,4] thiazepin-11- (10H) ketone) is used in a large amount, so that a large amount of phosphorus-containing wastewater is generated, and great pressure is caused to environmental management; in addition, the yield is relatively low due to the longer procedure.
2. The route reported in EP240228 is likewise dibenzo [ b, f ] [1,4] thiazepin-11- (10H) one and phosphorus oxychloride are chlorinated to give the intermediate 11-chloro-dibenzo [ b, f ] [1,4] thiazepin, which, unlike the route of EP282236, is condensed directly with the side chain 1- (2-hydroxyethoxy) ethylpiperazine to give quetiapine, the steps being reduced to a certain extent, but the overall route being still longer; the route also requires chlorination reaction and a large amount of phosphorus oxychloride; the ether and the methylene dichloride which are extremely flammable and explosive low-boiling solvents are used in the route, so that the potential safety hazard in production is high.
3. The route reported in patent W02005014590 is that dibenzo [ b, f ] [1,4] thiazepin-11- (10H) ketone is chlorinated to give intermediate 11-chloro-dibenzo [ b, f ] [1,4] thiazepin. Condensing the intermediate with 1- (2-hydroxy) ethylpiperazine to obtain 11- [4- (2-hydroxyethyl) -1-piperazinyl ] dibenzo [ b, f ] [1,4] thiazepine, condensing with a chloroethanol compound with protected hydroxy and removing the protecting group under acidic condition to obtain quetiapine, wherein the route step is longer due to the need of removing the protecting group, and the total yield is reduced; the traditional chlorination reagent is still adopted in the route, so that dangerous chlorination reaction is carried out; the mixed solvent of toluene, methanol, butanone, methanol and the like is used for multiple times in the route, so that the manufacturing cost and the environmental treatment cost are increased.
4, the route reported in patent CN101619047 is dibenzo [ b, f ] [1,4] thiazepin-11- (10H) ketone, which is chloridized by triphosgene to obtain intermediate 11-chloro-dibenzo [ b, f ] [1,4] thiazepin, which is then condensed directly with side chain 1- (2-hydroxyethoxy) ethylpiperazine to obtain quetiapine, the route is shorter than that of patent EP282236, EP240228 and W02005014590, the yield is high, triphosgene is used as chloride to carry out chloridization reaction, and no pollution is generated to environment during post treatment. However, the route still carries out chlorination reaction, and the danger of the chlorination process cannot be relieved; triphosgene is used in the route, and the compound generates phosgene after being heated, is a highly toxic product and has potential safety hazard.
In the prior art for industrially synthesizing quetiapine fumarate, at least two steps of chlorination and condensation are needed from dibenzo [ b, f ] [1,4] thiazepine-11- (10H) ketone to quetiapine fumarate, the chlorination reaction is high in risk, and certain pressure is caused to the environment after post-treatment. Based on the defects of the prior art scheme, the invention hopes to provide a high-efficiency preparation method of quetiapine fumarate.
Disclosure of Invention
The invention aims to provide a high-efficiency preparation method of quetiapine fumarate, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the efficient preparation method of quetiapine fumarate comprises the following steps: the dibenzo [ b, f ] [1,4] thiazepine-11- [10H ] ketone and 1- [2 (2-hydroxy ethoxy) ethyl ] piperazine are subjected to catalytic reaction in a solvent through a copper catalyst for 6-16 hours at 80-120 ℃ to obtain quetiapine free alkali, and after separation, fumaric acid is added to form salt to obtain quetiapine fumarate; the copper catalyst comprises a copper compound and an oxidant;
preferably, the copper compound is one or more of copper acetylacetonate, copper (II) bis (hexafluoroacetylacetonate), copper acetate, copper chloride, copper iodide, copper chloride and copper iodide.
Preferably, the copper compound is copper acetylacetonate or copper acetate.
Preferably, the oxidizing agent is one or two of di-tert-butyl peroxide and tert-butyl hydroperoxide.
Preferably, the oxidizing agent is di-t-butyl peroxide.
Preferably, the solvent is N, N-dimethylformamide or N, N-diethylformamide.
Preferably, the molar ratio of the dibenzo [ b, f ] [1,4] thiazepin-11- [10H ] ketone, the copper compound and the oxidant is 1:0.05:2-6.
Preferably, the molar ratio of the dibenzo [ b, f ] [1,4] thiazepin-11- [10H ] ketone, the copper compound and the oxidant is 1:0.05:4.
preferably, the weight ratio of the dibenzo [ b, f ] [1,4] thiazepin-11- [10H ] ketone to the N, N-dimethylformamide is 1:6-10.
Preferably, the weight ratio of the dibenzo [ b, f ] [1,4] thiazepin-11- [10H ] ketone to the N, N-dimethylformamide is 1:8.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention provides a high-efficiency preparation method of quetiapine fumarate, which uses a copper catalyst to carry out one-step condensation reaction on DPTP and heel to obtain quetiapine fumarate, so that the reaction steps are reduced, and the synthesis efficiency of quetiapine fumarate is greatly improved;
(2) The invention provides a high-efficiency preparation method of quetiapine fumarate, which avoids the chlorination reaction in the traditional synthesis process, does not need to use chlorides such as phosphorus oxychloride, thionyl chloride, triphosgene, oxalyl chloride and the like, greatly reduces the process danger and simultaneously eliminates the environmental pollution caused by post-treatment of the chlorination reaction.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Adding 1g of copper acetylacetonate and 160g (170 ml) of N, N-Dimethylformamide (DMF) into a reaction bottle, starting stirring, slowly dripping 51.5g of di-tert-butyl peroxide (DTBP), stirring for 30min at room temperature after dripping, sequentially adding 20g of dibenzo [ b, f ] [1,4] thiazepine-11- [10H ] ketone (DPTP) and 16g of 1- [2 (2-hydroxyethoxy) ethyl ] piperazine (heel) into the reaction bottle, heating to 80-90 ℃, preserving heat for reaction for 10H, cooling to 20-30 ℃, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, extracting a toluene layer, concentrating an upper toluene layer solution to dryness to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating and stirring until the quetiapine is dissolved, adding 5g of fumaric acid into the reaction bottle, stirring for 1H, cooling to 0-5 ℃ for crystallization, cooling to 1H, cooling to 1-30 ℃, preserving heat, crystallizing, preserving heat, filtering, and drying to obtain quetiapine free alkali after crystallization, and preserving heat for 3g.
Example 2
Adding 1g of copper acetylacetonate and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 90-100 ℃, carrying out thermal insulation reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain 30.8g of quetiapine.
Example 3
Adding 1g of copper acetylacetonate and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out thermal insulation reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain 35.4g of quetiapine.
Example 4
Adding 1g of copper acetylacetonate and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 110-120 ℃, carrying out thermal insulation reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain 35.5g of quetiapine fumarate.
Example 5
Adding 1g of copper acetylacetonate and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out thermal insulation reaction for 6h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain 27.9g of quetiapine.
Example 6
Adding 1g of copper acetylacetonate and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out heat preservation reaction for 8h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out heat preservation stirring for 1h, cooling to 0-5 ℃, carrying out heat preservation crystallization for 1h, carrying out heat preservation, and carrying out suction filtration to obtain 32.1g of quetiapine.
Example 7
Adding 1g of copper acetylacetonate and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out thermal insulation reaction for 12h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain quetiapine fumarate 35.9.
Example 8
Adding 1g of copper acetylacetonate and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out thermal insulation reaction for 14h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain quetiapine fumarate 35.7.
Example 9
Adding 1g of copper acetylacetonate and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out thermal insulation reaction for 16h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain quetiapine fumarate 35.5.
Example 10
Adding 1g of copper acetylacetonate and 160g (170 ml) of N, N-Dimethylacetamide (DEF) into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out heat preservation reaction for 10h, cooling to 20-30 ℃, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating and stirring until the quetiapine free alkali is dissolved, adding 5g of fumaric acid into the reaction bottle, carrying out heat preservation and stirring for 1h, cooling to 0-5 ℃ after heat preservation, crystallizing the fumaric acid for 1h after heat preservation, carrying out suction filtration, and obtaining 34.8g of quetiapine.
Example 11
Adding 1g of copper acetylacetonate and 160g (170 ml) of DMF into a reaction bottle, stirring, slowly dripping 51.5g of tert-butyl hydroperoxide (TBHP), stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, reacting for 10h under heat preservation, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating the upper toluene layer solution to dryness to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into quetiapine free alkali, heating and stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, stirring for 1h under heat preservation, cooling to 0-5 ℃ under heat preservation, crystallizing for 1h under heat preservation, filtering under heat preservation, and obtaining 28g of quetiapine fumarate.
Example 12
Adding 1g of cuprous chloride and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, preserving heat for reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, separating the extraction, concentrating the upper toluene layer solution to dryness to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating and stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, preserving heat and stirring for 1h, cooling to 0-5 ℃, preserving heat and crystallizing for 1h, preserving heat and filtering to obtain 23.7g of quetiapine.
Example 13
Adding 1g of cuprous iodide and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out thermal insulation reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain 26.9g of quetiapine.
Example 14
Adding 1g of copper chloride and 160g (170 ml) of DMF into a reaction bottle, stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, preserving heat for reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, separating the extraction, concentrating the upper toluene layer solution to dryness to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating and stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, preserving heat and stirring for 1h, cooling to 0-5 ℃, preserving heat and crystallizing for 1h, preserving heat and filtering to obtain 31.6g of quetiapine.
Example 15
Adding 1g of copper iodide and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out thermal insulation reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain 32.2g of quetiapine.
Example 16
Adding 1g of copper acetate and 160g (170 ml) of DMF into a reaction bottle, stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, preserving heat for reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution to dryness to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, preserving heat for stirring for 1h, cooling to 0-5 ℃, preserving heat for crystallization for 1h, preserving heat for filtering to obtain 34g of quetiapine fumarate.
Example 17
Adding 1g of bis (hexafluoroacetylacetone) copper (II) and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out heat preservation reaction for 10h, cooling to 20-30 ℃, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating and stirring to dissolve, adding 5g of fumaric acid into the reaction bottle, carrying out heat preservation and stirring for 1h, cooling to 0-5 ℃ after heat preservation, crystallizing for 1h after heat preservation, carrying out suction filtration, and drying to obtain 31.4g of quetiapine.
Example 18
Adding 1g of copper acetylacetonate and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 25.8g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out thermal insulation reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain 31g of quetiapine fumarate.
Example 19
Adding 1g of copper acetylacetonate and 160g (170 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 77.3g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out thermal insulation reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain 35.6g of quetiapine.
Example 20
Adding 1g of copper acetylacetonate and 120g (128 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out thermal insulation reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain quetiapine fumarate 35.4.
Example 21
Adding 1g of copper acetylacetonate and 200g (213 ml) of DMF into a reaction bottle, starting stirring, slowly dripping 51.5g of DTBP, stirring for 30min at room temperature after dripping, sequentially adding 20g of DPTP and 16gheep into the reaction bottle, heating to 100-110 ℃, carrying out thermal insulation reaction for 10h, cooling to 20-30 ℃ after reaction, adding 80g (80 ml) of drinking water into the reaction bottle, stirring for 30min, adding 100g (115 ml) of toluene for extraction, layering after extraction, concentrating an upper toluene layer solution, drying to obtain quetiapine free alkali, adding 110g (140 ml) of 95% ethanol into the quetiapine free alkali, heating, stirring until dissolving, adding 5g of fumaric acid into the reaction bottle, carrying out thermal insulation stirring for 1h, cooling to 0-5 ℃, carrying out thermal insulation crystallization for 1h, carrying out suction filtration to obtain 35.7g of quetiapine.
Summarizing data:
table 1: summary of data for the synthesis of quetiapine fumarate in examples 1-4
As can be seen from table 1: under certain other conditions, the influence of different reaction temperatures on the reaction is verified, the reaction is best when the reaction temperature is 100-110 ℃, the yield is lower when the reaction temperature is insufficient, the impurities are increased when the reaction temperature is too high, and the purity is reduced.
Table 2: summary of data for the synthesis of quetiapine fumarate in example 3, examples 5-9
As can be seen from table 2: under certain other conditions, the influence of different reaction time lengths on the reaction is verified, the reaction time length is 10-12 h after the reaction is finished, and impurities are increased and the purity is reduced when the reaction time is prolonged.
Table 3: summary of data for the synthesis of quetiapine fumarate in example 3, example 10
As can be seen from table 3: under certain other conditions, the solvent is replaced by DEF, and the whole yield and purity are not greatly different and can be used.
Table 4: summary of data for the synthesis of quetiapine fumarate in example 3, example 11
As can be seen from table 4: under other conditions, the oxidant is replaced by DTHP, the overall yield is greatly reduced, and the purity difference is small.
Table 5: summary of data for the Synthesis of quetiapine fumarate in example 3, examples 12-17
As can be seen from table 5: under the condition of certain other conditions, the influence of various copper compounds on the reaction is verified, and the comparison of the yield and the purity shows that the effect of the copper acetylacetonate and the copper acetate is optimal.
Table 6: summary of data for the Synthesis of quetiapine fumarate in example 3, examples 18-19
As can be seen from table 6: under other conditions, the influence of different amounts of the oxidizing agent DTBP on the reaction is verified, and the comparison of the yield and the purity proves that when the amount of the oxidizing agent DTBP is more than 4 times of the equivalent of DPTP, the reaction is basically completed, so that 4 times of the equivalent of the DTBP is most suitable.
Table 7: summary of data for the Synthesis of quetiapine fumarate in example 3, examples 20-21
As can be seen from table 7: under other conditions, the influence of the DMF solvents with different dosages on the reaction is verified, and the comparison of the yield and the purity shows that when the DMF dosage is 8 times or more of DPTP, the purity of the obtained product is better, so that the solvent dosage of 8 times is most suitable.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The efficient preparation method of quetiapine fumarate is characterized by comprising the following steps of: the dibenzo [ b, f ] [1,4] thiazepine-11- [10H ] ketone and 1- [2 (2-hydroxy ethoxy) ethyl ] piperazine are subjected to catalytic reaction in a solvent through a copper catalyst for 6-16 hours at 80-120 ℃ to obtain quetiapine free alkali, and after separation, fumaric acid is added to form salt to obtain quetiapine fumarate; the copper catalyst comprises a copper compound and an oxidant; the molar ratio of the dibenzo [ b, f ] [1,4] thiazepin-11- [10H ] ketone, the copper compound and the oxidant is 1:0.05:2-6; the copper compound is copper acetylacetonate or copper acetate; the oxidant is one or two of di-tert-butyl peroxide and tert-butyl hydroperoxide
2. The efficient preparation method of quetiapine fumarate according to claim 1, wherein the method comprises the following steps: the oxidant is di-tert-butyl peroxide.
3. The efficient preparation method of quetiapine fumarate according to claim 1, wherein the method comprises the following steps: the solvent is N, N-dimethylformamide or N, N-diethylformamide.
4. The efficient preparation method of quetiapine fumarate according to claim 1, wherein the method comprises the following steps: the molar ratio of the dibenzo [ b, f ] [1,4] thiazepin-11- [10H ] ketone, the copper compound and the oxidant is 1:0.05:4.
5. a process for the efficient preparation of quetiapine fumarate according to claim 3, characterized in that: the weight ratio of the dibenzo [ b, f ] [1,4] thiazepin-11- [10H ] ketone to the N, N-dimethylformamide is 1:6-10.
6. The efficient preparation method of quetiapine fumarate according to claim 5, wherein: the weight ratio of the dibenzo [ b, f ] [1,4] thiazepin-11- [10H ] ketone to the N, N-dimethylformamide is 1:8.
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