CN108479821A - A kind of catalyst and its application for synthesizing prothioconazoles intermediate - Google Patents

A kind of catalyst and its application for synthesizing prothioconazoles intermediate Download PDF

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CN108479821A
CN108479821A CN201810440598.4A CN201810440598A CN108479821A CN 108479821 A CN108479821 A CN 108479821A CN 201810440598 A CN201810440598 A CN 201810440598A CN 108479821 A CN108479821 A CN 108479821A
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catalyst
nickel cobalt
nickel
water
reaction
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卓朝旦
刘东明
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Changle Chicco Biotechnology Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/14Phosphorus; Compounds thereof
    • B01J27/185Phosphorus; Compounds thereof with iron group metals or platinum group metals
    • B01J27/1853Phosphorus; Compounds thereof with iron group metals or platinum group metals with iron, cobalt or nickel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/74Iron group metals
    • B01J23/755Nickel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/20Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
    • B01J35/23Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08Heat treatment
    • B01J37/082Decomposition and pyrolysis
    • B01J37/086Decomposition of an organometallic compound, a metal complex or a metal salt of a carboxylic acid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08Heat treatment
    • B01J37/10Heat treatment in the presence of water, e.g. steam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/28Phosphorising
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D249/00Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms
    • C07D249/02Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms not condensed with other rings
    • C07D249/081,2,4-Triazoles; Hydrogenated 1,2,4-triazoles

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  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
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  • Inorganic Chemistry (AREA)
  • Catalysts (AREA)

Abstract

The invention discloses a kind of catalyst and its applications for synthesizing prothioconazoles intermediate, by nickel acetylacetonate, four water cobalt acetates, polyvinylpyrrolidone, terephthalic acid (TPA) is put into the N of water sum, in N dimethyl formamide mixed solutions, magnetic agitation, it transfers the solution into the dynamic response kettle equipped with polytetrafluoroethyllining lining, dynamic response kettle is sealed, the organic inorganic composite materials of nickel cobalt are obtained by the reaction, wait for that reaction is cooled to room temperature, by product deionized water with N, N dimethyl formamide cross washings, it is dried in baking oven for 24 hours, the yellowish powdered organic inorganic composite materials of nickel cobalt are obtained with NaH2PO2The two in tube furnace is placed on together to separate using silica wool, under Ar protections, the nanoscale nickel cobalt bimetallic catalyst by the product utilization deionized water obtained after phosphatization with being dried to obtain black in absolute ethyl alcohol cross washing baking oven.Nickel cobalt bimetallic catalyst of the present invention increases substantially prothioconazoles intermediate yield, the technological process of production, reduces energy consumption.

Description

A kind of catalyst and its application for synthesizing prothioconazoles intermediate
Technical field
The present invention relates to a kind of catalyst and its applications for synthesizing prothioconazoles intermediate, belong to catalysis technique neck Domain.
Background technology
Prothioconazoles are worked by inhibiting the biosynthesis of mycosterol, have very extensive fungicidal spectrum.Rosickyite bacterium Azoles interior suction is good, has excellent protection, treats and root out activity, the lasting period is long.Prothioconazoles not only have crop good Safety, and preventing disease theraping effect is good, and volume increase is apparent.Compared with other triazole bactericidal agents, prothioconazoles more wide spectrum.Almost To all wheat diseases have good control effect, as on wheat and barley powdery mildew, banded sclerotial blight, droop, leaf spot, Rust, sclerotiniose, net blotch, moire disease etc.;The soil-borne disease of rape and peanut, such as sclerotiniose and main leaf can also be prevented Face disease, such as gray mold, black spot, brown spot, balck shank, sclerotiniose and rust.But current prothioconazoles are produced There is also many deficiencies from the point of view of method:Such as production process route complexity, the production cycle is long, causes producing cost excessively high;It prepared Impurity is introduced in journey, and quality is caused to decline;If carrying out secondary crystallization, and operating cost is caused to increase, yield declines, and cost increases 1- (1- chlorine cyclopropyl) -2-(1,2,4- triazolyl) ethyl ketone be it is a kind of synthesis prothioconazoles important intermediate, improve its yield, It is of great significance for shortening the prothioconazoles technological process of production, reducing energy consumption, finds a kind of raising 1- (1- chlorine cyclopropyl)- 2-(1,2,4- triazolyls) ethyl ketone synthetic yield catalyst and synthesis condition have very important significance.
Invention content
The purpose of the present invention is to provide a kind of catalyst and its application for synthesizing prothioconazoles intermediate, catalyst Prothioconazoles intermediate 1,2,4- triazoles can be catalyzed well with optimal conditions and the chloro- 1- chloracetyls cyclopropane of 1- is anti- It answers, there is higher product yield.
A kind of catalyst for synthesizing prothioconazoles intermediate, the catalyst are nickel cobalt bimetallic catalyst.
The nickel cobalt bimetallic catalyst preparation method is as follows:
Step 1, by 100mg nickel acetylacetonates, tetra- water cobalt acetates of 100mg, 400mg polyvinylpyrrolidones, 50mg terephthaldehydes Acid is put into 80ml water and the N of 160ml, N dimethyl formamide mixed solution, magnetic agitation 20min, is uniformly mixed;
Above-mentioned solution is transferred in the dynamic response kettle equipped with polytetrafluoroethyllining lining by step 2, and dynamic response kettle is sealed It is good, 6h is reacted at a temperature of 150 DEG C, obtains the organic inorganic composite materials of nickel cobalt, waits for that reaction is cooled to room temperature, product is spent Ionized water with N, N dimethyl formamides cross washing 3 times, in 7400r/min centrifugations, 60 DEG C of baking ovens it is dry for 24 hours, obtain micro- Huang The organic inorganic composite materials of powdered nickel cobalt of color;
Step 3, by the organic inorganic composite materials of the nickel cobalt obtained after drying with NaH2PO2It is placed in tube furnace together, with The mass ratio of the organic inorganic composite materials of nickel cobalt is 5:1, the two is separated using silica wool, under Ar protections, from 20 DEG C of room temperature Lower heating, heating rate are 2 DEG C/min, and reacting 3h at 350 DEG C just obtains product;
Step 4 centrifuges the product utilization deionized water obtained after phosphatization with absolute ethyl alcohol cross washing 5 times, 8500r/min The nanoscale nickel cobalt bimetallic catalyst of black is dried to obtain in 6min, 60 DEG C of baking ovens.
Application of the catalyst in synthesis prothioconazoles intermediate.
The prothioconazoles intermediate is 1- (1- chlorine cyclopropyl) -2-(1,2,4- triazolyls) ethyl ketone.
Specific synthesis application is as follows:
Water, 1,2,4- triazole, Anhydrous potassium carbonate and nickel cobalt bimetallic catalyst, magnetic force is added in step 1 in three-necked flask Stirring is heated to 65 DEG C, reacts 1h;
Step 2, at such a temperature, the mixed solution of the chloro- 1- chloracetyls cyclopropane of 1- and tetrahydrofuran is slowly dropped into, about 0.5h is added dropwise, and stops after the reaction was continued 4.5h;
Step 3 is down to room temperature after completion of the reaction, and stratification separates oil reservoir, with tetrahydrofuran aqueous layer extracted, merges organic phase, Anhydrous magnesium sulfate is dried, and filtering is evaporated off solvent, obtains brown oil liquid crude product;
Step 4 puts above-mentioned crude product to carbon tetrachloride in 250mL three-necked flasks, is added, and stirring is added dropwise dense to being completely dissolved Nitric acid, 30 DEG C of dropping temperature, about 10min is added dropwise, and continues to stir 1h, has white solid precipitation, be cooled to 15 DEG C, will be white Solid (1-(1- chlorine cyclopropyl)- 2- (1,2,4- triazolyls) ethyl ketone nitrate) filtering;
Above-mentioned oxazolone salt is added in the three-necked flask containing ethyl acetate by step 5, under stiring, 30% sodium hydroxide is added dropwise Weak solution adjusts pH=7, and the reaction was continued at 30 DEG C half an hour;
Step 6, standing, layering, organic solvent is spin-dried for, and residue is poured out while hot, and rapid crystallization, drying obtain after purification 1-(1- chlorine cyclopropyl)- 2- (1,2,4- triazolyls) ethyl ketone solid.
Advantageous effect:Catalyst can be catalyzed prothioconazoles intermediate 1,2,4- triazoles well with optimal conditions and 1- is chloro- 1- chloracetyl cyclopropane reacts, and has higher product yield.
Its reaction condition is to use normal pressure, nitrogen protection, water and tetrahydrofuran as solvent, with the chloro- 1- chloracetyls of 1- Cyclopropane and 1,2,4- triazoles are raw material, are obtained among it through N- alkylated reactions under the action of nickel cobalt bimetallic catalyst Body;It is that 1,2,4- triazoles generate triazole sylvite with carbonic acid nak response to react the first step, which is dissolved in water phase, second Step is that the chloro- 1- chloracetyls cyclopropane of 1- in the organic phase instilled is reacted with the triazole sylvite in water phase, which is SN2 Reaction mechanism, the primary halocarbon in the chloro- 1- chloracetyls cyclopropane of lone pair electrons attack 1- in triazole sylvite on nitrogen-atoms are former Son, chlorine atom are left away, and ammonium salt is generated, and potassium atom transfer is left away produces potassium chloride with chlorine atom, obtains product 1-(1- chlorine ring third Base)- 2- (1,2,4- triazolyls) ethyl ketone.
Specific implementation mode
Embodiment 1
1- (1- chlorine cyclopropyl) -2-(1,2,4- triazolyl) ethyl ketone synthetic method, this approach includes the following steps:
20mL water, 1.104g 1,2,4- triazoles, 7.776g Anhydrous potassium carbonates and 2g nickel cobalts is added in step 1 in three-necked flask Bimetallic catalyst, magnetic agitation are heated to 65 DEG C, react 1h;
Step 2, at such a temperature, the mixed solution of the chloro- 1- chloracetyls cyclopropane of 7.65g 1- and 20mL tetrahydrofurans is delayed Slow to instill, about 0.5h is added dropwise, and stops after the reaction was continued 4.5h;
Step 3 is down to room temperature after completion of the reaction, and stratification separates oil reservoir, with tetrahydrofuran aqueous layer extracted, merges organic phase, Anhydrous magnesium sulfate is dried, and filtering is evaporated off solvent, obtains brown oil liquid crude product;
Step 4 puts above-mentioned crude product to 100mL carbon tetrachloride in 250mL three-necked flasks, is added, and stirring is dripped to being completely dissolved Add the nitric acid of 6ml concentration 65%, 30 DEG C of dropping temperature, about 10min is added dropwise, and continues to stir 1h, there is white solid precipitation, cold But to 15 DEG C, by white solid (1-(1- chlorine cyclopropyl)- 2- (1,2,4- triazolyls) ethyl ketone nitrate) filtering;
Above-mentioned oxazolone salt is added in the three-necked flask containing 80mL ethyl acetate by step 5, under stiring, 30% hydrogen-oxygen is added dropwise Change sodium weak solution and adjust pH=7, the reaction was continued at 30 DEG C half an hour;
Step 6, standing, layering, organic solvent is spin-dried for, and residue is poured out while hot, and rapid crystallization, drying obtain after purification 1-(1- chlorine cyclopropyl)- 2- (1,2,4- triazolyls) ethyl ketone solid.
The nickel cobalt bimetallic catalyst preparation method is as follows:
Step 1, by 100mg nickel acetylacetonates, tetra- water cobalt acetates of 100mg, 400mg polyvinylpyrrolidones, 50mg terephthaldehydes Acid is put into 80ml water and the N of 160ml, N dimethyl formamide mixed solution, magnetic agitation 20min, is uniformly mixed;
Above-mentioned solution is transferred in the dynamic response kettle equipped with polytetrafluoroethyllining lining by step 2, and dynamic response kettle is sealed It is good, 6h is reacted at a temperature of 150 DEG C, obtains the organic inorganic composite materials of nickel cobalt, waits for that reaction is cooled to room temperature, product is spent Ionized water with N, N dimethyl formamides cross washing 3 times, in 7400r/min centrifugations, 60 DEG C of baking ovens it is dry for 24 hours, obtain micro- Huang The organic inorganic composite materials of powdered nickel cobalt of color;
Step 3, by the organic inorganic composite materials of the nickel cobalt obtained after drying with NaH2PO2It is placed in tube furnace together, with The mass ratio of the organic inorganic composite materials of nickel cobalt is 5:1, the two is separated using silica wool, under Ar protections, from 20 DEG C of room temperature Lower heating, heating rate are 2 DEG C/min, and reacting 3h at 350 DEG C just obtains product;
Step 4 centrifuges the product utilization deionized water obtained after phosphatization with absolute ethyl alcohol cross washing 5 times, 8500r/min The nanoscale nickel cobalt bimetallic catalyst of black is dried to obtain in 6min, 60 DEG C of baking ovens.
Embodiment 2
20mL water, 0.552 g, 1,2,4- triazoles, 7.176g Anhydrous potassium carbonates and 2g nickel is added in step 1 in three-necked flask Cobalt dual-metal catalyst, magnetic agitation are heated to 65 DEG C, react 1h;Remaining step is the same as embodiment 1.
Embodiment 3
20mL water, 0.276 g, 1,2,4- triazoles, 7.176g Anhydrous potassium carbonates and 2g nickel is added in step 1 in three-necked flask Cobalt dual-metal catalyst, magnetic agitation are heated to 65 DEG C, react 1h;Remaining step is the same as embodiment 1.
Embodiment 4
20mL water, 2.208 g, 1,2,4- triazoles, 7.176g Anhydrous potassium carbonates and 2g nickel is added in step 1 in three-necked flask Cobalt dual-metal catalyst, magnetic agitation are heated to 65 DEG C, react 1h;Remaining step is the same as embodiment 1.
Embodiment 5
20mL water, 4.416 g, 1,2,4- triazoles, 7.176g Anhydrous potassium carbonates and 2g nickel is added in step 1 in three-necked flask Cobalt dual-metal catalyst, magnetic agitation are heated to 65 DEG C, react 1h;Remaining step is the same as embodiment 1.
Embodiment 6
20mL water, 6.624g 1,2,4- triazoles, 7.176g Anhydrous potassium carbonates and 2g nickel cobalts is added in step 1 in three-necked flask Bimetallic catalyst, magnetic agitation are heated to 65 DEG C, react 1h;Remaining step is the same as embodiment 1.
Embodiment 7
20mL water, 1.104g 1,2,4- triazoles, 3.588 g Anhydrous potassium carbonates and 2g nickel is added in step 1 in three-necked flask Cobalt dual-metal catalyst, magnetic agitation are heated to 65 DEG C, react 1h;Remaining step is the same as embodiment 1.
Embodiment 8
20mL water, 1.104g 1,2,4- triazoles, 1.196 g Anhydrous potassium carbonates and 2g nickel is added in step 1 in three-necked flask Cobalt dual-metal catalyst, magnetic agitation are heated to 65 DEG C, react 1h;Remaining step is the same as embodiment 1.
Embodiment 9
20mL water, 1.104g 1,2,4- triazoles, 9.568 g Anhydrous potassium carbonates and 2g nickel is added in step 1 in three-necked flask Cobalt dual-metal catalyst, magnetic agitation are heated to 65 DEG C, react 1h;Remaining step is the same as embodiment 1.
Embodiment 10
20mL water, 1.104g 1,2,4- triazoles, 15.95 g Anhydrous potassium carbonates and 2g nickel is added in step 1 in three-necked flask Cobalt dual-metal catalyst, magnetic agitation are heated to 65 DEG C, react 1h;Remaining step is the same as embodiment 1.
Reference examples 1
It is with 1 difference of embodiment:In the synthesis step 1 of intermediate, Anhydrous potassium carbonate, remaining step and implementation be not added Example 1 is identical.
Reference examples 2
It is with 1 difference of embodiment:In the synthesis step 1 of intermediate, cobalt nickel bimetal catalyst, remaining step are not added It is identical with embodiment 1.
Reference examples 3
It is with 1 difference of embodiment:In the synthesis step 2 of intermediate, by the chloro- 1- chloracetyls cyclopropane of 3.83g 1- and The mixed solution of 20mL tetrahydrofurans is slowly dropped into, remaining step is identical with embodiment 1.
Reference examples 4
It is with 1 difference of embodiment:In the synthesis step 2 of intermediate, by the chloro- 1- chloracetyls cyclopropane of 1.91g 1- and The mixed solution of 20mL tetrahydrofurans is slowly dropped into, remaining step is identical with embodiment 1.
Reference examples 5
It is with 1 difference of embodiment:In the synthesis step 4 of intermediate, concentrated nitric acid is not added, remaining step and embodiment 1 It is identical.
Reference examples 6
It is with 1 difference of embodiment:In the synthesis step 4 of intermediate, replaced with the hydrochloric acid of equivalent, remaining step and embodiment 1 is identical.
Reference examples 7
It is with 1 difference of embodiment:In the synthesis step 5 of intermediate, PH=3.0 are adjusted;Remaining step is complete with embodiment 1 It is identical.
Reference examples 8
It is with 1 difference of embodiment:In the synthesis step 5 of intermediate, PH=10.0 are adjusted;Remaining step is complete with embodiment 1 It is identical.
Reference examples 9
It is with 1 difference of embodiment:In the synthesis step 5 of intermediate, ethyl acetate is not added, remaining step and embodiment 1 is identical.
Reference examples 10
It is with 1 difference of embodiment:It is constant with formic acid formic acid substituted acetic acid ethyl ester dosage in the synthesis step 5 of intermediate, Remaining step is identical with embodiment 1.
It is as shown in the table for reaction result under embodiment and reference examples different condition
The experimental results showed that catalyst has catalysis 1,2,4- triazoles and the chloro- 1- chloracetyls cyclopropane synthetic reactions of 1- Good catalytic effect, in one timing of reaction condition, intermediate yield is higher, and catalytic performance is better, otherwise poorer;1,2,4- tri- Nitrogen azoles, Anhydrous potassium carbonate mass ratio are 1:7 and 1:When 14,(Embodiment 1,2)Other dispensings are fixed, and synthetic effect is best, with reality Example 1,2 is applied the difference lies in that embodiment 3 changes to embodiment 10 1,2,4- triazole of primary raw material, Anhydrous potassium carbonate respectively Dosage and proportioning have the yield of synthetic product different influences;Reference examples 1 to reference examples 2 do not add catalyst and anhydrous Potassium carbonate, other steps are identical, and product yield is caused to be substantially reduced, and illustrate the receipts of catalyst and Anhydrous potassium carbonate to reaction Rate influences very big;Reference examples 3 to reference examples 4 reduce the chloro- 1- chloracetyls cyclopropane dosages of 1-, and effect is still bad, illustrates 1- Its dosage is also critically important as reactant for chloro- 1- chloracetyls cyclopropane;Reference examples 5 to the hydrochloric acid of reference examples 6 replaces concentrated nitric acid, So that product obtains yield reduction, reaction effect is obviously deteriorated, and illustrates the very big on the precipitation of crude product influence of concentrated nitric acid;Reference examples 7 To reference examples 10 adjust pH value and use methyl formate substituted acetic acid ethyl ester, reactant composition and solution environmental changes, reaction Variation with obvious effects, product yield be not still high;Therefore using the catalyst of the present invention to 1-(1- chlorine cyclopropyl)-2-(1,2, 4- triazolyls) ethyl ketone synthetic reaction have excellent catalytic effect.

Claims (5)

1. a kind of catalyst for synthesizing prothioconazoles intermediate, which is characterized in that the catalyst is nickel cobalt bimetallic catalytic Agent.
2. a kind of catalyst for synthesizing prothioconazoles intermediate according to claim 1, which is characterized in that
The nickel cobalt bimetallic catalyst preparation method is as follows:
Step 1, by 100mg nickel acetylacetonates, tetra- water cobalt acetates of 100mg, 400mg polyvinylpyrrolidones, 50mg terephthaldehydes Acid is put into 80ml water and the N of 160ml, N dimethyl formamide mixed solution, magnetic agitation 20min, is uniformly mixed;
Above-mentioned solution is transferred in the dynamic response kettle equipped with polytetrafluoroethyllining lining by step 2, and dynamic response kettle is sealed It is good, 6h is reacted at a temperature of 150 DEG C, obtains the organic inorganic composite materials of nickel cobalt, waits for that reaction is cooled to room temperature, product is spent Ionized water with N, N dimethyl formamides cross washing 3 times, in 7400r/min centrifugations, 60 DEG C of baking ovens it is dry for 24 hours, obtain micro- Huang The organic inorganic composite materials of powdered nickel cobalt of color;
Step 3, by the organic inorganic composite materials of the nickel cobalt obtained after drying with NaH2PO2It is placed in tube furnace together, with nickel The mass ratio of the organic inorganic composite materials of cobalt is 5:1, the two is separated using silica wool, under Ar protections, at 20 DEG C of room temperature Heating, heating rate are 2 DEG C/min, and reacting 3h at 350 DEG C just obtains product;
Step 4 centrifuges the product utilization deionized water obtained after phosphatization with absolute ethyl alcohol cross washing 5 times, 8500r/min The nanoscale nickel cobalt bimetallic catalyst of black is dried to obtain in 6min, 60 DEG C of baking ovens.
3. catalyst as described in claim 1 is in the application of synthesis prothioconazoles intermediate.
4. application according to claim 3, which is characterized in that the prothioconazoles intermediate is 1- (1- chlorine rings third Base) -2-(1,2,4- triazolyls) ethyl ketone.
5. application according to claim 4, which is characterized in that specific synthesis application is as follows:
Water, 1,2,4- triazole, Anhydrous potassium carbonate and nickel cobalt bimetallic catalyst, magnetic force is added in step 1 in three-necked flask Stirring is heated to 65 DEG C, reacts 1h;
Step 2, at such a temperature, the mixed solution of the chloro- 1- chloracetyls cyclopropane of 1- and tetrahydrofuran is slowly dropped into, about 0.5h is added dropwise, and stops after the reaction was continued 4.5h;
Step 3 is down to room temperature after completion of the reaction, and stratification separates oil reservoir, with tetrahydrofuran aqueous layer extracted, merges organic phase, Anhydrous magnesium sulfate is dried, and filtering is evaporated off solvent, obtains brown oil liquid crude product;
Step 4 puts above-mentioned crude product to carbon tetrachloride in 250mL three-necked flasks, is added, and stirring is added dropwise dense to being completely dissolved Nitric acid, 30 DEG C of dropping temperature, about 10min is added dropwise, and continues to stir 1h, has white solid precipitation, be cooled to 15 DEG C, will be white Solid (1-(1- chlorine cyclopropyl)- 2- (1,2,4- triazolyls) ethyl ketone nitrate) filtering;
Above-mentioned oxazolone salt is added in the three-necked flask containing ethyl acetate by step 5, under stiring, 30% sodium hydroxide is added dropwise Weak solution adjusts pH=7, and the reaction was continued at 30 DEG C half an hour;
Step 6, standing, layering, organic solvent is spin-dried for, and residue is poured out while hot, and rapid crystallization, drying obtain after purification 1-(1- chlorine cyclopropyl)- 2- (1,2,4- triazolyls) ethyl ketone solid.
CN201810440598.4A 2018-05-10 2018-05-10 A kind of catalyst and its application for synthesizing prothioconazoles intermediate Withdrawn CN108479821A (en)

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CN105153054A (en) * 2015-10-12 2015-12-16 吉林化工学院 Synthetic method for 1-(1-chloro-cyclopropyl)-2-(1,2,4-triazolyl)ethanone
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