CN104230820A - Method for synthesizing azoxystrobin - Google Patents
Method for synthesizing azoxystrobin Download PDFInfo
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- CN104230820A CN104230820A CN201410471170.8A CN201410471170A CN104230820A CN 104230820 A CN104230820 A CN 104230820A CN 201410471170 A CN201410471170 A CN 201410471170A CN 104230820 A CN104230820 A CN 104230820A
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- 0 COC(C(*)c(cccc1)c1O)OC Chemical compound COC(C(*)c(cccc1)c1O)OC 0.000 description 3
- JNEZGHPSXFUFMT-UHFFFAOYSA-N N#Cc1ccccc1Oc1ncnc(Cl)c1 Chemical compound N#Cc1ccccc1Oc1ncnc(Cl)c1 JNEZGHPSXFUFMT-UHFFFAOYSA-N 0.000 description 2
- DKYVWISSXFHNNU-UHFFFAOYSA-N CN(COC)OC Chemical compound CN(COC)OC DKYVWISSXFHNNU-UHFFFAOYSA-N 0.000 description 1
- XJPZKYIHCLDXST-UHFFFAOYSA-N Clc1ncnc(Cl)c1 Chemical compound Clc1ncnc(Cl)c1 XJPZKYIHCLDXST-UHFFFAOYSA-N 0.000 description 1
- CHZCERSEMVWNHL-UHFFFAOYSA-N N#Cc1ccccc1O Chemical compound N#Cc1ccccc1O CHZCERSEMVWNHL-UHFFFAOYSA-N 0.000 description 1
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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
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
- C07D239/46—Two or more oxygen, sulphur or nitrogen atoms
- C07D239/52—Two oxygen atoms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0234—Nitrogen-, phosphorus-, arsenic- or antimony-containing compounds
- B01J31/0235—Nitrogen containing compounds
- B01J31/0254—Nitrogen containing compounds on mineral substrates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
- B01J2231/40—Substitution reactions at carbon centres, e.g. C-C or C-X, i.e. carbon-hetero atom, cross-coupling, C-H activation or ring-opening reactions
- B01J2231/42—Catalytic cross-coupling, i.e. connection of previously not connected C-atoms or C- and X-atoms without rearrangement
- B01J2231/4277—C-X Cross-coupling, e.g. nucleophilic aromatic amination, alkoxylation or analogues
- B01J2231/4288—C-X Cross-coupling, e.g. nucleophilic aromatic amination, alkoxylation or analogues using O nucleophiles, e.g. alcohols, carboxylates, esters
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- Chemical Kinetics & Catalysis (AREA)
- Plural Heterocyclic Compounds (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Pyridine Compounds (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a method for synthesizing azoxystrobin and a catalyst applied to azoxystrobin synthesis. According to the catalyst, triethylene diamine is fixedly connected to the surface of silica gel, thus, the synthetic reaction of azoxystrobin can be effectively catalyzed, the catalyst can be recovered and reused by a simple method, and the consumption of the catalyst is lowered, so that the catalyst is applicable to large-scale industrial production.
Description
Technical field
The present invention relates to the synthetic method of phenoxy pyrimidine derivates, particularly relate to synthetic method and the special-purpose catalyst of Azoxystrobin.
Background technology
Azoxystrobin is a kind of methoxy acrylic bactericide, and chemical name is (E)-2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3-methoxy-methyl acrylate.This sterilant wide spectrum, efficient, almost all there is excellent activity to all Eumycetes diseases such as Powdery Mildew, rust, glume blight, net blotch, oidium, rice blast etc.Azoxystrobin is the maximum sterilant of global consumption, and a large amount of patent document discloses its synthetic method, and current Azoxystrobin synthetic method mainly contains following three kinds of routes:
Route one: synthesize Azoxystrobin by (E)-2-[2-(6-pyrimidine-4-yl oxygen base) phenyl]-3-methoxy-methyl acrylate and salicylonitrile or its salt.
A kind of synthetic method of Azoxystrobin is disclosed in WO9208703, the method by (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate (chemical compounds I) and salicylonitrile, salt of wormwood with the halogenide of copper for catalyzer, at polar solvent particularly N, etherification reaction is there is in dinethylformamide, reaction terminates rear filtration desalination and uses N, dinethylformamide washs, filtrate and washings underpressure distillation obtain thick product except after desolventizing, and thick product methanol crystallization, drying obtain product.
WO2008043978A1 reports catalyzer 1, substrate (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate and 2-cyanophenol to react under existing and generate Azoxystrobin by 4-diazabicylo [2.2.2] octane, and this method is that this that do process for synthetic catalyst to WO9208703 and EP0382375 mantoquita enters.
CN101558047A discloses and 2-cyanophenol and sodium hydroxide is carried out being obtained by reacting cyanophenol sodium in polar organic solvent, then reacts the method for Azoxystrobin with (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate and 2-cyanophenol.
CN1234794 discloses and 2-cyanophenol and potassium hydroxide is obtained by reacting 2-cyanophenol potassium, then reacts the method for Azoxystrobin with (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate.
Patent WO9208703A1 discloses the synthetic method of intermediate (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate: (E)-3-(α-methoxymethylene) benzofuranone and sodium methylate, 4, the reaction of 6-dichloro pyrimidine generates 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-methoxypropene acid methyl esters, then slough a part methyl alcohol and obtain (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate.
Route two: 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-oxygen base] phenyl] methyl acetate formylation; methyl-sulfate or halomethane methoxylation obtain Azoxystrobin (reaction formula), and patent CN101157657A discloses the method.
Route three: patent CN103145627 discloses with 2-chlorobenzonitrile as raw material, palladium or copper catalysis and 4 in the basic conditions, 6-dihydroxy-pyrimidine carries out linked reaction and obtains 4-hydroxyl-6-(2-cyano-benzene oxygen) pyrimidine, then under organic bases is as triethylamine or pyridine existence, chlorination obtains the chloro-6-of 4-(2-cyano-benzene oxygen) pyrimidine, after purification process with (E)-2-(2-hydroxy phenyl)-3-methoxy-methyl acrylate in atmosphere of inert gases with mantoquita as cuprous chloride or tertiary amine obtain Azoxystrobin as DMAP does catalyst reaction.Reaction formula is as follows:
The shortcoming of the method is the preparation of (E)-2-(2-hydroxy phenyl)-3-methoxy-methyl acrylate difficulty; Use high boiling solvent, reaction is at high temperature carried out, and energy consumption is high; Reaction need be carried out under protection of inert gas; The catalytic capability of mantoquita and tertiary amine is weak.
The catalyzer that current synthesis Azoxystrobin is commonly used has triethylene diamine and derivative thereof, mantoquita, quinine alkaloid, N-Methyl pyrrolidone etc., wherein conventional with triethylene diamine.Reaction terminates rear catalyst and enters in waste water, constantly consumes price catalyzer costly, and adds the intractability of waste water.
Summary of the invention
The invention provides a kind of synthetic method of Azoxystrobin and the catalyzer for Azoxystrobin synthesis, this catalyzer is that triethylene diamine immobilization is connected to Silica Surface, not only can the building-up reactions of catalysis Azoxystrobin effectively, can also be reclaimed by simple method and reuse, decrease the consumption of catalyzer, adapt to large-scale industrial production.
The synthetic method of Azoxystrobin of the present invention, synthesis step is as follows:
(1) under catalyzer existence and alkaline condition, 4,6-dichloro pyrimidine and 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate carries out linked reaction in a suitable solvent, obtain 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3, the solution of 3-dimethoxy methyl propionate, this solution is left intact and is directly used in next step reaction;
(2) salt of 2-hydroxy-phenylformonitrile and alkali or 2-hydroxy-phenylformonitrile is added in the reaction solution obtained to (1), obtain the solution containing 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3,3-dimethoxy methyl propionates and reclaim catalyzer;
(3) add an acidic catalyst and acid anhydrides in the reaction solution obtained to (2), slough a part methyl alcohol, aftertreatment obtains Azoxystrobin;
React described catalyst structure to be shown below:
Wherein: n is the integer of 0-17, X
-for negative univalent anion.
The chemical equation related to is as follows:
One, the synthesis of 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-dimethoxy methyl propionates
Two, the synthesis of 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3,3-dimethoxy methyl propionates
Three, the synthesis of (E)-2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3-methoxy-methyl acrylate (Azoxystrobin)
In technique scheme of the present invention, the solvent that step (1) is reacted is ethers, ester class, ketone, the fragrant same clan, amides, sulfone class, halogenated hydrocarbon solvent, or ethers, ester class, the fragrant same clan, halogenated hydrocarbon and the ketone of poorly water-soluble and the two-phase mixture of water in aforementioned solvents.Such as: methyl tertiary butyl ether, isopropyl ether, ethyl acetate, methyl iso-butyl ketone (MIBK), toluene, dimethylbenzene, chlorobenzene, oil of mirbane, N, dinethylformamide, N, N-diethylformamide, acetone, methyl-sulphoxide, tetramethylene sulfone, 2-butanone, acetone, methylene dichloride, chloroform etc.
In technique scheme of the present invention, when step (1) selects single-phase solvent, step (2) to the processing mode of reaction solution is: step (2) is obtained reacting liquid filtering, with solvent wash, filtrate and washings merging are 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3, the solution of 3-dimethoxy methyl propionate, for next step reaction; Filter the solid that obtains to be dissolved in water inorganic salt, filter, washing, reclaim catalyzer; When step (1) selects two-phase solvent, step (2) to the processing mode of reaction solution is: reacting liquid filtering, reclaims catalyzer; Filtrate phase-splitting, is the solution of 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3,3-dimethoxy methyl propionates after organic phase water washing, for next step reaction.
In any technical scheme of the present invention, the mol ratio of 4,6-dichloro pyrimidine and 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate is 1:0.95-1.05, and temperature of reaction is 0-100 DEG C, reaction times 1-5h; Alkali used is one or more in sodium carbonate, salt of wormwood, Quilonum Retard, sodium hydroxide, potassium hydroxide or lithium hydroxide, its consumption be the 0.5-1.5 of 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate doubly (mol ratio).React described catalyst anions and include but not limited to chlorion, bromide anion, iodide ion, hydroxide radical, sulfonate radical etc.
In any technical scheme of the present invention, 2-hydroxy-phenylformonitrile and 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3, the ratio 1:0.9-1.15 of 3-dimethoxy methyl propionate, temperature of reaction is 0-50 DEG C, reaction times 2-10h, alkali used is one or more in sodium carbonate, salt of wormwood, Quilonum Retard, sodium hydroxide, potassium hydroxide or lithium hydroxide, its consumption be the 0.5-1.5 of 2-hydroxy-phenylformonitrile doubly (mol ratio).
In any technical scheme of the present invention, an acidic catalyst used is organic acid, such as methylsulfonic acid, tosic acid etc.; Or solid acid, such as storng-acid cation exchange resin and silica gel sulfonic acid etc.Catalyst levels is 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3, the 0.1-5.0% of 3-dimethoxy methyl propionate, acid anhydrides, include but not limited to diacetyl oxide, consumption is 2-(2-hydroxy phenyl)-3, doubly (mol ratio), temperature of reaction is 20-150 DEG C to the 1.0-2.0 of 3-dimethoxy methyl propionate, reaction times 1-12h.
In any technical scheme of the present invention, step (3) post-treating method for: by obtained solution decompression distillating recovering solvent, then add methyl alcohol or alcohol crystal, filter, washing, drying obtains product.
The present invention also provides the another kind of synthetic method of Azoxystrobin, and synthesis step is as follows:
(1) catalyzer exist and alkaline condition under, 4,6-dichloro pyrimidine and 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate carries out linked reaction, the solution that the treated recovery catalyzer of reaction solution also obtains 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-dimethoxy methyl propionates is used for next step reaction;
(2) to the 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3 that (1) obtains, an acidic catalyst and acid anhydrides is added in the solution of 3-dimethoxy methyl propionate, slough the solution that a part methyl alcohol obtains (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate, reaction solution adds water washing deacidification or direct evaporated under reduced pressure and then add solvent and carry out next step reaction;
(3) add salt and the catalyzer of 2-hydroxy-phenylformonitrile and alkali or 2-hydroxy-phenylformonitrile in the reaction solution obtained to (2), react, the treated recovery catalyzer of reaction solution and Azoxystrobin.
React described catalyst structure to be shown below:
Wherein: n is the integer of 0-17, X
-for negative univalent anion.
In technique scheme of the present invention, step (1) solvent is selected from ethers, ester class, the fragrant same clan, halogenated hydrocarbon and the ketone of poorly water-soluble and the two-phase mixture of water in ethers, ester class, ketone, the fragrant same clan, amides, sulfone class or halogenated hydrocarbon solvent or aforementioned solvents; Such as: methyl tertiary butyl ether, isopropyl ether, ethyl acetate, methyl iso-butyl ketone (MIBK), toluene, dimethylbenzene, chlorobenzene, oil of mirbane, N, dinethylformamide, N, N-diethylformamide, acetone, methyl-sulphoxide, tetramethylene sulfone, 2-butanone, acetone, methylene dichloride, chloroform etc.The mol ratio of 4,6-dichloro pyrimidine and 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate is 1:0.95-1.05, and temperature of reaction is 0-100 DEG C, reaction times 1-5h; Alkali used is one or more in sodium carbonate, salt of wormwood, Quilonum Retard or sodium hydroxide, potassium hydroxide and lithium hydroxide etc., its consumption is 0.5-1.5 times (mol ratio) of 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate.React described catalyst anions and include but not limited to chlorion, bromide anion, iodide ion, hydroxide radical, sulfonate radical etc.
In technique scheme of the present invention, when step (1) selects single-phase solvent, to the processing mode of step (1) reaction solution be: by reacting liquid filtering, gained solid solvent wash, filtrate and washings merging are 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3, the solution of 3-dimethoxy methyl propionate, for next step reaction; Filter the solid that obtains to be dissolved in water inorganic salt, filter, washing, reclaim catalyzer; When step (1) selects two-phase solvent, be: reacting liquid filtering reclaim catalyzer to the processing mode of step (1) reaction solution; Filtrate phase-splitting, the solution of 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-dimethoxy methyl propionates after organic phase water washing, for next step reaction.
In any technical scheme of the present invention, step (2) an acidic catalyst used is organic acid, such as methylsulfonic acid, tosic acid etc.; Or solid acid, such as storng-acid cation exchange resin and silica gel sulfonic acid etc.Catalyst levels is 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3, the 0.1-5.0% of 3-dimethoxy methyl propionate, acid anhydrides, include but not limited to diacetyl oxide, consumption is 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3, doubly (mol ratio), temperature of reaction is 20-150 DEG C to 3-methoxypropene acid methyl esters 1.0-2.0, reaction times 1-12h.
In any technical scheme of the present invention, the ratio 1:0.9-1.15 of 2-hydroxy-phenylformonitrile and (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate, temperature of reaction is 0-50 DEG C, reaction times 2-10h, alkali used is one or more in sodium carbonate, salt of wormwood, Quilonum Retard or sodium hydroxide, potassium hydroxide and lithium hydroxide etc., its consumption be the 0.5-1.5 of 2-hydroxy-phenylformonitrile doubly (mol ratio).
In any technical scheme of the present invention, step (3) post-treating method is: when step (3) selects single-phase solvent, to the processing mode of step (3) reaction solution be: by reacting liquid filtering, gained solid solvent wash, filtrate and washings merge the solution being Azoxystrobin, by obtained solution decompression distillating recovering solvent, then add methyl alcohol or alcohol crystal, filtration, washing, drying obtain product.; Filter the solid that obtains to be dissolved in water inorganic salt, filter, washing, reclaim catalyzer; When step (3) selects two-phase solvent, be: reacting liquid filtering reclaim catalyzer to the processing mode of step (3) reaction solution; Filtrate phase-splitting, the solution of Azoxystrobin after organic phase water washing, by obtained solution decompression distillating recovering solvent, then adds methyl alcohol or alcohol crystal, and filtration, washing, drying obtain product.
The chemical equation related to is as follows:
One, the synthesis of 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-dimethoxy methyl propionates
Two, the synthesis of (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate
Three, the synthesis of (E)-2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3-methoxy-methyl acrylate (Azoxystrobin)
The present invention also provides the method for the third synthesis Azoxystrobin, and synthesis step is as follows:
(1) under catalyzer existence and alkaline condition, 4,6-dichloro pyrimidine and 2-hydroxy-phenylformonitrile carry out linked reaction in a suitable solvent, obtain the solution of the chloro-6-of 4-(2-cyano-benzene oxygen) pyrimidine, and this solution is left intact and is directly used in next step reaction;
(2) 2-(2-hydroxy phenyl)-3 is added in the reaction solution obtained to (1), 3-dimethoxy methyl propionate and alkali, react, the solution that reaction solution process obtains 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3,3-dimethoxy methyl propionates reacts for next step and reclaims catalyzer.
(3) add catalyzer and diacetyl oxide in the reaction solution obtained to (2), slough a part methyl alcohol, aftertreatment obtains Azoxystrobin;
React described catalyst structure as follows:
Wherein: n is the integer of 0-17, X
-for negative univalent anion.
The chemical equation related to is as follows:
In technique scheme of the present invention, the solvent that step (1) is reacted is ethers, ester class, ketone, the fragrant same clan, amides, sulfone class, halogenated hydrocarbon solvent, or ethers, ester class, the fragrant same clan, halogenated hydrocarbon and the ketone of poorly water-soluble and the two-phase mixture of water in aforementioned solvents.Such as: methyl tertiary butyl ether, isopropyl ether, ethyl acetate, methyl iso-butyl ketone (MIBK), toluene, dimethylbenzene, chlorobenzene, oil of mirbane, N, dinethylformamide, N, N-diethylformamide, acetone, methyl-sulphoxide, tetramethylene sulfone, 2-butanone, acetone, methylene dichloride, chloroform etc.
In any technical scheme of the present invention, the mol ratio of 4,6-dichloro pyrimidine and 2-hydroxy-phenylformonitrile is 1:0.95-1.05, and temperature of reaction is 0-50 DEG C, reaction times 1-5h; Alkali used is one or more in sodium carbonate, salt of wormwood, Quilonum Retard, sodium hydroxide, potassium hydroxide or lithium hydroxide, its consumption be the 0.5-1.5 of 2-hydroxy-phenylformonitrile doubly (mol ratio).React described catalyst anions and include but not limited to chlorion, bromide anion, iodide ion, hydroxide radical, sulfonate radical etc.
In any technical scheme of the present invention, 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate and 4, the ratio 1:0.9-1.15 of 6-dichloro pyrimidine, temperature of reaction is 0-50 DEG C, reaction times 2-10h, and alkali used is one or more in sodium carbonate, salt of wormwood, Quilonum Retard, sodium hydroxide, potassium hydroxide or lithium hydroxide, its consumption is 0.5-1.5 times (mol ratio) of 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate.
In any technical scheme of the present invention, an acidic catalyst used is organic acid, such as methylsulfonic acid, tosic acid etc.; Or solid acid, such as storng-acid cation exchange resin and silica gel sulfonic acid etc.Catalyst levels is 2-(2-hydroxy phenyl)-3, the 0.1-5.0% (quality) of 3-dimethoxy methyl propionate, acid anhydrides, include but not limited to diacetyl oxide, consumption is 2-(2-hydroxy phenyl)-3, doubly (mol ratio), temperature of reaction is 20-150 DEG C to the 1.0-2.0 of 3-dimethoxy methyl propionate, reaction times 1-12h.
In any technical scheme of the present invention, when step (1) selects single-phase solvent, to the processing mode of step (2) reaction solution be: by reacting liquid filtering, gained solid solvent wash, filtrate and washings merging are 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3, the solution of 3-dimethoxy methyl propionate, for next step reaction; Filter the solid that obtains to be dissolved in water inorganic salt, filter, washing, reclaim catalyzer; When step (1) selects two-phase solvent, be: reacting liquid filtering reclaim catalyzer to the processing mode of step (2) reaction solution; Filtrate phase-splitting, the solution of 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3,3-dimethoxy methyl propionates after organic phase water washing, for next step reaction.
In any technical scheme of the present invention, step (3) post-treating method for: by obtained solution decompression distillating recovering solvent, then add methyl alcohol or alcohol crystal, filter, washing, drying obtains product.
Catalyzer of the present invention is synthesized by method shown in following chemical equation:
Wherein: n is the integer of 0-17, LG is suitable leavings group, and X-is negative univalent anion, and R is that the general preparation method of the alkyl of C1-C6 is as follows: 1) silica gel and formula I reflux 24h in toluene, and cooling, filters, washing drying; 2) gained solid and triethylene diamine heating reflux reaction 24h in acetone, cooling, filters, washing, the dry triethylene diamine derivative obtaining supported on silica-gel.
The present invention also provides the compound of structure as follows being catalyzed into the application in ether reaction, the application especially in the reaction of synthesis Azoxystrobin,
Wherein: n is the integer of 0-17, X
-for negative univalent anion.
Described one-tenth ether reaction, also can be described as etherification reaction, reaction process is illustrated as: A1-O-LG+B1-X → A1-O-B1, and wherein LG is suitable leavings group, such as hydrogen atom etc., and X is halogen, such as chlorine, bromine, iodine etc.
Those skilled in the art should know, reactions steps involved in the present invention, such as, directly reaction solution is used for the next step and does not carry out aftertreatment purifying in step (1)-(3); Washings after filtration and filtrate merge and directly do not discard washings; The operations such as recovery catalyzer are the optimization to synthesis Azoxystrobin reactions steps, reach the object of saving treatment step and/or improving yield.Those skilled in the art or can become bad post processing mode and should be encompassed in the protection domain of the application with carry out any equivalent of routine techniques means.
Embodiment
In order to understand the present invention further, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these describe just for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
Embodiment 1
10g silica gel is suspended in 250mL toluene, stirs, and is heated to backflow, and drip chloromethyl Trimethoxy silane 15mL, back flow reaction 24h, is cooled to room temperature, and filter, solid uses toluene and washed with dichloromethane respectively, 70 DEG C of drying under reduced pressure 5h; The solid of gained is put into 1000mL tetra-mouthfuls of round-bottomed flasks, add 7.5g triethylene diamine and 600mL acetone, stir, heating reflux reaction 24h, is cooled to room temperature, filters, solid once uses acetone and washed with dichloromethane, 50 DEG C of drying under reduced pressure 5h, obtains the triethylene diamine catalyzer 1 of supported on silica-gel.
Embodiment 2
10g silica gel is suspended in 250mL toluene, stirs, and is heated to backflow, and drip 3-iodine propyl trimethoxy silicane 18mL, back flow reaction 24h, is cooled to room temperature, and filter, solid uses toluene and washed with dichloromethane respectively, 70 DEG C of drying under reduced pressure 5h; The solid of gained is put into 1000mL tetra-mouthfuls of round-bottomed flasks, add 7.5g triethylene diamine and 600mL acetone, stir, heating reflux reaction 24h, is cooled to room temperature, filters, solid once uses acetone and washed with dichloromethane, 50 DEG C of drying under reduced pressure 5h, obtains the triethylene diamine catalyzer 2 of supported on silica-gel.
Embodiment 3
(1) synthesis of 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate
3-(α-methoxyl group)-methylenebenzofuran-2 (3H)-one 179.6g (98% is added in the four-hole boiling flask of 1000mL, 1.0mol), 400mL methyl alcohol,-5-0 DEG C is cooled to after stirring, drip 198g methanol solution of sodium methylate (30% at this temperature, 1.1mol), dropwise follow-up continuation of insurance temperature 1h, reaction solution acetic acid neutralizes, then dichloromethane extraction (3 × 300mL) is used, anhydrous sodium sulfate drying, filter, filtrate decompression Distillation recovery ethylene dichloride, distillation residue are 2-(2-hydroxy phenyl)-3, 3-dimethoxy methyl propionate (224.4g, content 92%), yield 86%.
(2) synthesis of 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-dimethoxy methyl propionates
4 are dropped in the reaction flask of 250mL, 6-dichloro pyrimidine 15.2g (98%, 0.1mol), 6.0g sodium carbonate (99%, 0.056mol), 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate 26.0g (92%, 0.1mol), toluene 100mL, 2.6g supported on silica-gel catalyzer 1, room temperature reaction, 4h samples, and HPLC analyzes the content 95.3% of display 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-dimethoxy methyl propionates, 4,6-dichloro pyrimidine content is less than 1%, stopped reaction, and reaction solution is stand-by.
(3) synthesis of 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3,3-dimethoxy methyl propionates.
Salicylonitrile sodium salt 14.8 (95% in above-mentioned reaction solution, 1.0mol), stirring at room temperature is reacted, 5h, sampling, HPLC analyzes display 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-dimethoxy methyl propionate and salicylonitrile content are respectively 0.7% and 1.8%, stopped reaction, filter, solid toluene wash, merge washings and filtrate stand-by; Gained solid adds 10mL water, stirs and fully dissolves, and filters, and washing, 80 DEG C of drying under reduced pressure 5h, obtain catalyzer 2.4g.
(4) synthesis of Azoxystrobin
By above-mentioned 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3, the toluene solution of 3-dimethoxy methyl propionate is poured in three mouthfuls of reaction flasks of 500mL, add diacetyl oxide 11.3g (99%, 0.11mol), tosic acid 0.5g, stir, be warming up to 95-100 DEG C, reaction 8h, sampling, HPLC analyzes display 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3, 3-dimethoxy methyl propionate content 0.85%, make reflux into water distilling apparatus, toluene is reclaimed in underpressure distillation, add 70mL methyl alcohol, stir, be cooled to 5-10 DEG C, crystallization, filter, filter cake 100mL methanol wash twice, dry, heavy 34.2g, content 98.4%, yield 83.5%.
Embodiment 4:
(1) synthesis of 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-methoxypropene acid methyl esters
4 are dropped in the reaction flask of 500mL, 6-dichloro pyrimidine 15.2g (98%, 0.1mol), 6.0g sodium carbonate (99%, 0.056mol), 2-(2-hydroxy phenyl)-3, 3-dimethoxy methyl propionate 26.0g (92%, 0.1mol), toluene 100mL, 2.0g catalyzer 2, room temperature reaction, 4h samples, HPLC analyzes display 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3, the content 94.9% of 3-dimethoxy methyl propionate, 4, 6-dichloro pyrimidine content is less than 1%, stopped reaction, filter, solid toluene wash, filtrate and washings merge stand-by, solid adds 25mL water and stirs fully dissolving, filter, washing, 80 DEG C of drying under reduced pressure 5h, obtain catalyzer 1.9g.
(2) synthesis of (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate.
By above-mentioned 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3, the toluene solution of 3-dimethoxy methyl propionate is poured in three mouthfuls of reaction flasks of 500mL, add diacetyl oxide 11.3g (99%, 0.11mol), methylsulfonic acid 0.3g, stir, be warming up to 105-110 DEG C, reaction 6h, sampling, HPLC analyzes display 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-dimethoxy methyl propionate content 0.58%, be cooled to room temperature, organic phase adds water washing (50mL × 3), and organic phase is stand-by.
(3) synthesis of Azoxystrobin
The toluene solution of above-mentioned (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate is poured in three mouthfuls of reaction flasks of 500mL, add salicylonitrile sodium salt 14.8g (95%, 0.10mol), the catalyzer 2 reclaimed, be warming up to 80-85 DEG C, reaction 5h, sampling, HPLC analyzes display (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate content 0.57%, reaction solution is cooled to room temperature, filter, the abundant stirring and dissolving of 25mL water is added after solid toluene wash, filter, solids washed with water, 80 DEG C of drying under reduced pressure 5h, obtain catalyzer 1.88g, merging filtrate and washings, toluene is reclaimed in underpressure distillation, adds 70mL methyl alcohol, stirs, is cooled to 5-10 DEG C, crystallization, filters, filter cake 20mL methanol wash twice, dries, heavy 33.6g, content 98.4%, yield 82.0%, .
Embodiment 5
(1) synthesis of the chloro-6-of 4-(2-cyano-benzene oxygen) pyrimidine
Salicylonitrile sodium solid 14.8g (95%, 0.1mol) is dropped into, 4 in the reaction flask of 500mL, 6-dichloro pyrimidine 15.2g (98%, 0.1mol), DMF 100mL, 1.2g catalyzer 1 room temperature reaction, 4h samples, and HPLC analyzes display 4-chloro-6-(2-cyano-benzene oxygen) pyrimidine content 95.8%, 4,6-dichloro pyrimidine content is less than 1%, and reaction solution is stand-by.
(2) synthesis of 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3,3-dimethoxy methyl propionates
2-(2-hydroxy phenyl)-3 is added in above-mentioned reaction solution, 3-dimethoxy methyl propionate 26.0g (92%, 0.1mol), sodium carbonate 8.0g (99%, 0.075mol), stirring at room temperature is reacted, 5h, sampling, HPLC analyzes display 2-(2-hydroxy phenyl)-3, 3-dimethoxy methyl propionate and the chloro-6-of 4-(2-cyano-benzene oxygen) pyrimidine content are respectively 1.1% and 0.3%, stopped reaction, filter, solid N, by the abundant stirring and dissolving of 20mL water after dinethylformamide washing, filter, washing, 80 DEG C of drying under reduced pressure 5h, obtain catalyzer 1.18g.
(3) synthesis of Azoxystrobin
By above-mentioned 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3, the N of 3-dimethoxy methyl propionate, dinethylformamide solution is poured in three mouthfuls of reaction flasks of 500mL, add diacetyl oxide 11.3g (99%, 0.11mol), methylsulfonic acid 0.2g, stir, be warming up to 95-100 DEG C, reaction 8h, sampling, HPLC analyzes display 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3, 3-dimethoxy methyl propionate content 0.85%, make reflux into water distilling apparatus, N is reclaimed in underpressure distillation, dinethylformamide adds 70mL methyl alcohol, stir, be cooled to 5-10 DEG C, crystallization, filter, filter cake 20mL methanol wash twice, dry, heavy 35.0g, content 98.0%, yield 85.1%.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. the synthetic method of Azoxystrobin, is characterized in that, synthesis step is as follows:
(1) under catalyzer existence and alkaline condition, 4,6-dichloro pyrimidine and 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate carries out linked reaction in a suitable solvent, obtain 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3, the solution of 3-dimethoxy methyl propionate, this solution is left intact and is directly used in next step reaction;
(2) salt of 2-hydroxy-phenylformonitrile and alkali or 2-hydroxy-phenylformonitrile is added in the reaction solution obtained to (1), reaction solution is treated to be obtained the solution containing 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3,3-dimethoxy methyl propionates and reclaims catalyzer;
(3) add an acidic catalyst and acid anhydrides in the reaction solution obtained to (2), slough a part methyl alcohol, aftertreatment obtains Azoxystrobin;
React described catalyst structure as follows:
Wherein: n is the integer of 0-17, X
-for negative univalent anion.
2. synthetic method as claimed in claim 1, is characterized in that, the solvent that step (1) is reacted be selected from ethers, ester class, ketone, the fragrant same clan, amides, sulfone class or halogenated hydrocarbon solvent one or more; Step (2) to the processing mode of reaction solution is: step (2) is obtained reacting liquid filtering, with solvent wash, filtrate and washings merging are 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3, the solution of 3-dimethoxy methyl propionate, for next step reaction; Filter the solid that obtains to be dissolved in water inorganic salt, filter, washing, reclaim catalyzer;
Or the solvent that step (1) is reacted is selected from ethers, ester class, the fragrant same clan, halogenated hydrocarbon and the ketone of poorly water-soluble and the two-phase mixture of water; Step (2) to the processing mode of reaction solution is: reacting liquid filtering, reclaims catalyzer; Filtrate phase-splitting, is the solution of 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3,3-dimethoxy methyl propionates after organic phase water washing, for next step reaction.
3. the synthetic method of Azoxystrobin, it is characterized in that, the salt of synthesis step comprises (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate and 2-hydroxy-phenylformonitrile and alkali or 2-hydroxy-phenylformonitrile, react in the presence of a catalyst, aftertreatment obtains Azoxystrobin; Described catalyst structure is as follows:
Wherein: n is the integer of 0-17, X
-for negative univalent anion.
4. synthetic method as claimed in claim 3, it is characterized in that, synthesis step is as follows:
(1) catalyzer exist and alkaline condition under, 4,6-dichloro pyrimidine and 2-(2-hydroxy phenyl)-3,3-dimethoxy methyl propionate carries out linked reaction in a solvent, the solution that the treated recovery catalyzer of reaction solution also obtains 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-dimethoxy methyl propionates is used for next step reaction;
(2) to the 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3 that (1) obtains, an acidic catalyst and acid anhydrides is added in the solution of 3-dimethoxy methyl propionate, slough the solution that a part methyl alcohol obtains (E)-2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3-methoxy-methyl acrylate, reaction solution adds water washing deacidification or direct evaporated under reduced pressure and then add solvent and carry out next step reaction;
(3) add salt and the catalyzer of 2-hydroxy-phenylformonitrile and alkali or 2-hydroxy-phenylformonitrile in the reaction solution obtained to (2), react, the treated recovery catalyzer of reaction solution and Azoxystrobin;
React described catalyst structure as follows:
Wherein: n is the integer of 0-17, X
-for negative univalent anion.
5. synthetic method as claimed in claim 4, it is characterized in that, the reaction solvent of step (1) and (3) be selected from ethers, ester class, ketone, the fragrant same clan, amides, sulfone class or halogenated hydrocarbon solvent one or more be used as single-phase solvent; To the processing mode of step (1) reaction solution be: by reacting liquid filtering, gained solid solvent wash, filtrate and washings merge the solution being 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-dimethoxy methyl propionates, for next step reaction; Filter the solid that obtains to be dissolved in water inorganic salt, filter, washing, reclaim catalyzer;
Or the reaction solvent of step (1) and (3) is selected from ethers, ester class, the fragrant same clan, halogenated hydrocarbon and the ketone of poorly water-soluble and the two-phase mixture of water; Be: reacting liquid filtering reclaim catalyzer to the processing mode of step (1) reaction solution; Filtrate phase-splitting, the solution of 2-[2-(6-chloropyrimide-4-base oxygen base) phenyl]-3,3-dimethoxy methyl propionates after organic phase water washing, for next step reaction.
6. synthetic method as claimed in claim 5, it is characterized in that, when step (3) selects single-phase solvent, to the processing mode of step (3) reaction solution be: by reacting liquid filtering, gained solid solvent wash, filtrate and washings merge the solution being Azoxystrobin, and aftertreatment obtains Azoxystrobin product; Filter the solid that obtains to be dissolved in water inorganic salt, filter, washing, reclaim catalyzer; When step (3) selects two-phase solvent, be: reacting liquid filtering reclaim catalyzer to the processing mode of step (3) reaction solution; Filtrate phase-splitting, the solution of Azoxystrobin after organic phase water washing, aftertreatment obtains Azoxystrobin product.
7. the synthetic method of Azoxystrobin, is characterized in that, synthesis step is as follows:
(1) under catalyzer existence and alkaline condition, 4,6-dichloro pyrimidine and 2-hydroxy-phenylformonitrile carry out linked reaction in a suitable solvent, obtain the solution of the chloro-6-of 4-(2-cyano-benzene oxygen) pyrimidine, and this solution is left intact and is directly used in next step reaction;
(2) 2-(2-hydroxy phenyl)-3 is added in the reaction solution obtained to (1), 3-dimethoxy methyl propionate and alkali, react, the solution that reaction solution process obtains 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3,3-dimethoxy methyl propionates reacts for next step and reclaims catalyzer;
(3) add catalyzer and diacetyl oxide in the reaction solution obtained to (2), slough a part methyl alcohol, aftertreatment obtains Azoxystrobin;
React described catalyst structure as follows:
Wherein: n is the integer of 0-17, X
-for negative univalent anion.
8. synthetic method as claimed in claim 7, is characterized in that, the reaction solvent of step (1) be selected from ethers, ester class, ketone, the fragrant same clan, amides, sulfone class or halohydrocarbon one or more as single-phase solvent; To the processing mode of step (2) reaction solution be: by reacting liquid filtering, gained solid solvent wash, filtrate and washings merging are 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3, the solution of 3-dimethoxy methyl propionate, for next step reaction; Filter the solid that obtains to be dissolved in water inorganic salt, filter, washing, reclaim catalyzer;
Or the reaction solvent of step (1) is selected from ethers, ester class, the fragrant same clan, halogenated hydrocarbon and the ketone of poorly water-soluble and the two-phase mixture of water; Be: reacting liquid filtering reclaim catalyzer to the processing mode of step (2) reaction solution; Filtrate phase-splitting, the solution of 2-[2-[6-(2-cyano-benzene oxygen) pyrimidine-4-yl oxygen base] phenyl]-3,3-dimethoxy methyl propionates after organic phase water washing, for next step reaction.
9. the compound of structure as follows is being catalyzed into the application in ether reaction,
Wherein: n is the integer of 0-17, X
-for negative univalent anion.
10. the compound of structure as follows is as the application of catalyzer in synthesis Azoxystrobin,
Wherein: n is the integer of 0-17, X
-for negative univalent anion.
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