WO2018180944A1 - ハロゲン含有ピラゾールカルボン酸の製造方法 - Google Patents
ハロゲン含有ピラゾールカルボン酸の製造方法 Download PDFInfo
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- WO2018180944A1 WO2018180944A1 PCT/JP2018/011583 JP2018011583W WO2018180944A1 WO 2018180944 A1 WO2018180944 A1 WO 2018180944A1 JP 2018011583 W JP2018011583 W JP 2018011583W WO 2018180944 A1 WO2018180944 A1 WO 2018180944A1
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- 0 *C(c1c(*)[n](*)nc1F)=O Chemical compound *C(c1c(*)[n](*)nc1F)=O 0.000 description 2
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
- C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
- C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three 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, e.g. ester or nitrile radicals, directly attached to ring carbon 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/02—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the alkali- or alkaline earth metals or beryllium
- B01J23/04—Alkali metals
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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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
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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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
- B01J27/25—Nitrates
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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
- B01J31/0201—Oxygen-containing compounds
- B01J31/0209—Esters of carboxylic or carbonic acids
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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
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/28—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of the platinum group metals, iron group metals or copper
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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
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/32—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of manganese, technetium or rhenium
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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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/19—Catalysts containing parts with different compositions
Definitions
- the present invention relates to a method for producing a halogen-containing pyrazole carboxylic acid (preferably a fluorinated pyrazole carboxylic acid) useful as an intermediate for medical and agricultural chemicals.
- a halogen-containing pyrazole carboxylic acid preferably a fluorinated pyrazole carboxylic acid
- Patent Document 1 discloses a method of obtaining a compound represented by the following formula (b 1 ) by reacting a compound represented by the following formula (a 1 ) with sodium hypochlorite in the presence of water. ing.
- the present invention includes the following inventions.
- a compound represented by formula (a) described below is reacted with oxygen in the presence of a compound containing a transition metal atom to obtain a compound represented by formula (b) described below.
- the manufacturing method of the compound represented by Formula (b). (2) The production method according to (1), wherein the compound containing a transition metal atom is a compound containing Mn, Co, Fe, Cu, or Ni.
- the compound containing a transition metal atom is a transition metal nitrate, a transition metal sulfate, a transition metal acetate, a transition metal carbonate, or a transition metal phosphate (1) or ( The manufacturing method as described in 2).
- a halogen-containing pyrazole carboxylic acid useful as a pharmaceutical and agrochemical intermediate can be produced more simply and efficiently, and an industrially superior production method can be provided.
- a numerical range expressed using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value.
- a compound represented by formula (a) (hereinafter referred to as “compound (a)”) in the presence of a compound containing a transition metal atom (hereinafter referred to as “compound M”).
- compound (b) a compound represented by the formula (b) in which a compound represented by the formula (b) (hereinafter referred to as “compound (b)”) is obtained by reacting oxygen with oxygen.
- R 1 is an alkyl group having 1 to 3 carbon atoms, preferably a methyl group.
- R 2 is a hydrogen atom or a halogen atom.
- the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- R 2 is preferably a hydrogen atom.
- R F is a haloalkyl group having 1 to 3 carbon atoms.
- a haloalkyl group means a group in which one or more hydrogen atoms of an alkyl group are substituted with a halogen atom.
- Specific examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- R F is, monohalomethyl group (e.g., fluoromethyl group, chloromethyl group), a dihalomethyl group (e.g., difluoromethyl group, dichloromethyl group), a trihalomethyl group (e.g., trifluoromethyl group, dichlorofluoromethyl Group, chlorodifluoromethyl group), monohaloethyl group (eg, 2-fluoroethyl group, 2-chloroethyl group) and dihaloethyl group (eg, 2,2-difluoroethyl group, 2,2-dichloroethyl group).
- monohalomethyl group e.g., fluoromethyl group, chloromethyl group
- a dihalomethyl group e.g., difluoromethyl group, dichloromethyl group
- a trihalomethyl group e.g., trifluoromethyl group, dichlorofluoromethyl Group, chlorodifluoromethyl group
- R F is preferably a monohalomethyl group, a dihalomethyl group or a trihalomethyl group, more preferably a dihalomethyl group or a trihalomethyl group, still more preferably a difluoromethyl group, a dichlorofluoromethyl group or a chlorodifluoromethyl group, and particularly preferably a difluoromethyl group.
- R H is C m H 2m + 1 , and m is an integer of 1 to 3. m is preferably 1 or 2, and more preferably 1. That is, RH is preferably CH 3 or C 2 H 5 , and more preferably CH 3 .
- compound M a compound containing Mn, Co, Fe, Cu, or Ni is preferable, and a compound containing Mn is more preferable.
- Compound M is in the form of transition metal nitrate, transition metal sulfate, transition metal acetate, transition metal carbonate, transition metal phosphate, transition metal hydroxide, transition metal halide ( Chlorides, bromides, fluorides, etc.) and transition metal oxides.
- the compound M can also be said to be an ionic compound containing a transition metal ion.
- transition metal nitrates transition metal sulfates, transition metal acetates, transition metal carbonates, or transition metal phosphates are preferred, and transition metal nitrates.
- Mn (NO 3 ) 2 Mn (NO 3 ) 2 , Co (NO 3 ) 2 , Fe (NO 3 ) 3 , Cu (NO 3 ) 2 , or Ni (NO 3 ) 2 is more preferable, and Mn (NO 3 ) 2 Is particularly preferred.
- Compound M may be used in the form of a hydrate.
- the amount of compound M to be used is preferably 0.001 molar equivalent or more with respect to compound (a) from the viewpoint of the conversion rate of the reaction, and preferably 2 molar equivalents or less from the viewpoint of suppressing side reactions. 2.0 molar equivalents are more preferable, and 0.01 to 1.2 molar equivalents are even more preferable.
- the compound M may be used individually by 1 type, and may be used in combination of 2 or more type.
- the above reaction is preferably carried out by supplying oxygen to the mixture of the compound (a) and the compound M.
- mixing the compound (a) and the compound M they may be mixed together, or one of the compound (a) and the compound M may be added separately to the other, May be mixed.
- the above reaction is preferably carried out in the presence of Compound M and carboxylic acid.
- carboxylic acid is preferably an alkyl carboxylic acid having one or more carboxy groups.
- the alkyl carboxylic acid may be linear, branched, or cyclic.
- the alkylcarboxylic acid is preferably an alkylcarboxylic acid having 1 to 10 carbon atoms.
- alkyl carboxylic acid examples include acetic acid, propionic acid, butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, pivalic acid, 3-methylbutanoic acid and cyclohexanecarboxylic acid.
- Acetic acid, pentanoic acid, hexanoic acid or octanoic acid is more preferable in that the yield of the reaction is good.
- the combination of compound M and carboxylic acid is selected from the group consisting of Mn (NO 3 ) 2 , Co (NO 3 ) 2 , Fe (NO 3 ) 3 , Cu (NO 3 ) 2 , and Ni (NO 3 ) 2.
- one compound M, and acetic acid, combinations of pentanoic acid, one carboxylic acid selected from the group consisting of hexanoic acid and octanoic acid are preferred to be, Mn (NO 3) a combination of 2 and acetic acid, Mn (NO 3)
- a combination of 2 and pentanoic acid, a combination of Mn (NO 3 ) 2 and hexanoic acid, or a combination of Mn (NO 3 ) 2 and octanoic acid is more preferable from the viewpoint of yield.
- the amount of the carboxylic acid used is preferably 1 to 1000 times by mass with respect to the compound (a) from the viewpoint of the conversion rate of the reaction, more preferably 1.2 to 100 times by mass from the viewpoint of suppressing the side reaction. It is more preferably 0 to 30 times by mass.
- carboxylic acid may be used individually by 1 type, and may be used in combination of 2 or more type.
- the reaction is further carried out in the presence of any one of nitric acid, an alkali metal salt of nitric acid or an alkaline earth metal salt of nitric acid, and the reaction is easily accelerated. It is preferable in that it easily proceeds. More preferably, the reaction is carried out in the presence of Compound M, carboxylic acid and nitric acid, in the presence of an alkali metal salt of Compound M, carboxylic acid and nitric acid, or in the presence of an alkaline earth metal salt of Compound M, carboxylic acid and nitric acid. More preferably, the reaction is more easily accelerated in the presence of Compound M, carboxylic acid and nitric acid.
- alkali metal ion forming the alkali metal salt of nitric acid Li + , Na + , K + , Rb + or Cs + is preferable, and since the reactivity is good and the availability is easy, Na + or K + Is more preferable.
- Specific examples of the alkali metal salt of nitric acid include Li (NO 3 ), Na (NO 3 ), K (NO 3 ), Rb (NO 3 ), and Cs (NO 3 ).
- Mg 2+ , Ca 2+ or Ba 2+ is preferable, and the reactivity is good, and Ca 2+ is more preferable because it is easily available.
- Specific examples of the alkaline earth metal salt of nitric acid include Mg (NO 3 ) 2 , Ca (NO 3 ) 2 and Ba (NO 3 ) 2 .
- the amount of nitric acid used is preferably 0.001 molar equivalent to 1.0 molar equivalent with respect to compound (a) from the viewpoint of the conversion rate of the reaction, and 0.002 molar equivalent to 0 from the viewpoint of suppressing side reactions. More preferred is 5 molar equivalents.
- the amount of nitric acid alkali metal salt or nitric acid alkaline earth metal salt used is preferably 0.001 molar equivalent to 1.0 molar equivalent with respect to compound (a) from the viewpoint of the conversion rate of the reaction. From the viewpoint of suppression, 0.002 molar equivalent to 0.5 molar equivalent is more preferable.
- the combination of compound M, carboxylic acid and nitric acid is a group consisting of Mn (NO 3 ) 2 , Co (NO 3 ) 2 , Fe (NO 3 ) 3 , Cu (NO 3 ) 2 , and Ni (NO 3 ) 2.
- reaction When the reaction is carried out in the presence of compound M, carboxylic acid, and any of alkali metal salt of nitric acid, nitric acid or alkaline earth metal salt of nitric acid, compound (a), compound M, carboxylic acid, and It may be carried out by supplying oxygen to a mixture of nitric acid, an alkali metal salt of nitric acid or an alkaline earth metal salt of nitric acid.
- oxygen may be supplied as a mixed gas with other gases.
- the supply amount of oxygen is preferably 0.1 ml / min or more with respect to 1 mol of compound (a) from the viewpoint of the conversion rate of the reaction, and preferably 300 ml / min or less from the viewpoint of economy.
- the reaction temperature in the first embodiment is preferably ⁇ 20 ° C. to + 200 ° C., more preferably 0 ° C. to 160 ° C., from the viewpoint of suppressing side reactions and allowing the reaction to proceed efficiently.
- Examples of the method for isolating the compound (b) from the system after the reaction include solvent extraction and crystallization.
- the second embodiment of the present invention provides a method for producing compound (b), wherein compound (b) is obtained by reacting compound (a) with oxygen in the presence of alkali.
- the alkali include lithium hydroxide, sodium hydroxide, potassium hydroxide, sodium methoxide, sodium ethoxide, sodium tert-butoxide, potassium methoxide, potassium ethoxide and potassium tert-butoxide.
- Sodium hydroxide or potassium hydroxide is preferred, and sodium hydroxide is particularly preferred.
- the above reaction is preferably carried out by supplying oxygen to the mixture of the compound (a) and the alkali. When mixing the compound (a) and the alkali, they may be mixed together, or one of the compound (a) and the alkali is added separately to the other, and the two are mixed. May be.
- the amount of alkali used is preferably 0.8 molar equivalents or more with respect to compound (a) from the viewpoint of the conversion rate of the reaction, preferably 10 molar equivalents or less from the viewpoint of suppressing side reactions, and 0.8 to 10 molar equivalents are more preferred, and 0.9 to 5.0 molar equivalents are even more preferred.
- an alkali may be used individually by 1 type and may be used in combination of 2 or more type.
- the reaction is preferably further performed in the presence of water. That is, the above reaction is preferably carried out in the presence of alkali and water.
- the conversion rate of the reaction is further improved.
- the amount of water used is preferably 0.01 molar equivalents or more with respect to the compound (a) from the viewpoint of the conversion rate of the reaction, and preferably 500 molar equivalents or less from the viewpoint of suppressing side reactions. 500 molar equivalents are more preferable, and 0.1 to 100 molar equivalents are even more preferable.
- the above reaction may be further performed in the presence of an organic solvent.
- organic solvent include polar organic solvents such as tert-butanol, tert-amyl alcohol, acetonitrile, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, N, N′-dimethylpropyleneurea, sulfolane, 1,3-dimethyl-2.
- tert-butanol tert-amyl alcohol, acetonitrile, dimethylformamide, dimethylacetamide, dimethyl sulfoxide or N-methyl-2-pyrrolidone is more preferred, tert-butanol, Particular preference is given to tert-amyl alcohol, dimethylformamide, dimethyl sulfoxide or N-methyl-2-pyrrolidone.
- tert-amyl alcohol, dimethylformamide, dimethyl sulfoxide or N-methyl-2-pyrrolidone Particular preference is given to tert-amyl alcohol, dimethylformamide, dimethyl sulfoxide or N-methyl-2-pyrrolidone.
- the solubility of the compound (a) is improved and the reaction easily proceeds efficiently.
- it is preferable to carry out the reaction by supplying oxygen to the mixture of the compound (a), the alkali and the organic solvent.
- oxygen may be supplied as a mixed gas with other gases.
- the supply amount of oxygen is preferably 0.1 ml / min or more with respect to 1 mol of compound (a) from the viewpoint of the conversion rate of the reaction, and preferably 300 ml / min or less from the viewpoint of economy.
- the reaction temperature in the second embodiment is preferably ⁇ 20 ° C. to + 200 ° C., more preferably 0 ° C. to 160 ° C., from the viewpoint of suppressing side reactions and allowing the reaction to proceed efficiently.
- finish of reaction it is preferable to make an acid act on the product obtained by the said reaction after completion
- the product may be isolated and then reacted with an acid.
- the reaction mixture is allowed to react with the acid as it is without isolation.
- the acid include sulfuric acid, hydrogen chloride, hydrochloric acid and nitric acid.
- the method for causing the acid to act on the product include a method in which the product and the acid are mixed.
- Examples of the method for isolating the compound (b) from the system after the reaction include solvent extraction and crystallization.
- the compound (b) is useful as an intermediate of an antibacterial agent, bactericidal agent, or medical / agrochemical base, and for example, is useful as an intermediate of the following antibacterial agent, bactericidal agent or medical / agrochemical base.
- the amount of waste liquid can be reduced as compared with the prior art, and the compound (b) can be produced efficiently. That is, the chloroalkane (chloroform etc.) byproduced by the oxidation reaction by sodium hypochlorite disclosed in the prior art is not substantially by-produced in the present invention. Therefore, according to the production method of the present invention, it is possible to produce an antibacterial agent, bactericidal agent, or pharmaceutical / agricultural active ingredient more efficiently than in the prior art.
- Example 14 is a comparative example. The results are shown in Table 1.
- Example 2 According to the same procedure as in Example 1, except that manganese (II) nitrate hexahydrate was changed to iron (III) nitrate nonahydrate (0.44 g, 20 mol% based on compound (a 1 )) (B 1 ) was obtained.
- Example 3 According to the same procedure as in Example 1, except that manganese nitrate (II) hexahydrate was changed to cobalt nitrate (II) hexahydrate (0.32 g, 20 mol% with respect to compound (a 1 )). (B 1 ) was obtained.
- Example 4 According to the same procedure as in Example 1, except that manganese (II) nitrate hexahydrate was changed to nickel (II) nitrate hexahydrate (0.31 g, 20 mol% with respect to compound (a 1 )) (B 1 ) was obtained.
- Example 5 According to the same procedure as in Example 1, except that manganese (II) nitrate hexahydrate was changed to copper (II) nitrate trihydrate (0.27 g, 20 mol% based on compound (a 1 )) (B 1 ) was obtained.
- Example 6 Compound (b 1 ) was obtained according to the same procedure as in Example 1, except that hexanoic acid was changed to acetic acid. In addition, the yield of the compound (b 1 ) was 97% from quantitative analysis by HPLC.
- Example 7 According to the same procedure as in Example 1, except that hexanoic acid was changed to pentanoic acid and the heating time for 8 hours was changed to 6 hours, compound (b 1 ) was obtained. In addition, the yield of the compound (b 1 ) was 97% from quantitative analysis by HPLC.
- Example 8 Compound (b 1 ) was obtained according to the same procedure as Example 1 except that hexanoic acid was octanoic acid, the heating temperature of the mixture was changed from 100 ° C. to 110 ° C., and the heating time of 8 hours was changed to 10 hours. . As a result of quantitative analysis by HPLC, the conversion rate of the compound (a 1 ) was 52%, and the yield of the compound (b 1 ) was 51%.
- Example 9 Compound (a 1 ) (5.0 g), manganese nitrate (II) hexahydrate (1.98 g, 20 mol% with respect to compound (a 1 )) and octanoic acid (44 g) were used, and the heating time was 8 hours.
- Compound (b 1 ) was obtained according to the same procedure as in Example 1 except that the time was changed to 27 hours. As a result of quantitative analysis by HPLC, the conversion rate of the compound (a 1 ) was 98%, and the yield of the compound (b 1 ) was 90%.
- Example 10 Compound (a 1 ) (6.0 g), manganese nitrate (II) hexahydrate (1.65 g, 20 mol% relative to compound (a 1 )), octanoic acid (53 g), 70% nitric acid (0.24 g)
- the mixture (20 mol% with respect to the compound (a 1 )) was heated to 100 ° C., and a mixed gas of oxygen and nitrogen (oxygen concentration: 21%) was blown into the mixture at 10 ml / min. After the mixture was heated at 100 ° C. for 15 hours and subjected to quantitative analysis by HPLC, the conversion rate of compound (a 1 ) was 97% and the yield of compound (b 1 ) was 94%.
- Example 11 Compound (a 1 ) (8.0 g), manganese nitrate (II) hexahydrate (0.52 g, 4 mol% based on compound (a 1 )), octanoic acid (70 g), 70% nitric acid (0.63 g).
- the compound (b 1 ) was obtained according to the same procedure as in Example 10, except that the amount was 6 mol% relative to the compound (a 1 ), and the heating time for 15 hours was changed to 17 hours. As a result of quantitative analysis by HPLC, the conversion rate of the compound (a 1 ) was 97%, and the yield of the compound (b 1 ) was 97%.
- Example 12 A mixture of compound (a 1 ) (1.0 g), sodium hydroxide (1.1 g) and N-methyl-2-pyrrolidone (135 g) is heated to 40 ° C., and oxygen and nitrogen are mixed in the mixture. Gas (oxygen concentration: 21%) was blown at 1500 ml / min. The formation of the target compound (b 1 ) was confirmed by HPLC reaction tracking. The mixture was heated at 40 ° C. for 14 hours and then quantitatively analyzed by HPLC. As a result, the yield of the compound (b 1 ) was 69%.
- N-methyl-2-pyrrolidone was distilled off from the reaction solution by distillation under reduced pressure, water was added thereto to dissolve the solid, and chloroform was further added to separate the layers. Sulfuric acid was added to the separated aqueous layer to precipitate a solid, followed by filtration to recover the solid. The solid content was washed with water and analyzed, and as a result, it was confirmed that it was a compound (b 1 ) having a HPLC purity of 99%.
- Example 13 Compound (a 1 ) (1.0 g), sodium hydroxide (0.92 g), N-methyl-2-pyrrolidone (135 g), water (0.38 g, 4 molar equivalents relative to compound (a 1 )) The mixed solution was heated to 40 ° C., and a mixed gas of oxygen and nitrogen (oxygen concentration: 21%) was blown into the mixed solution at 100 ml / min. The formation of the target compound (b 1 ) was confirmed by HPLC reaction tracking. The mixture was heated at 40 ° C. for 23 hours and then quantitatively analyzed by HPLC. As a result, the yield of the compound (b 1 ) was 80%. Further, the mixed solution was heated at 70 ° C. for 3 hours and then quantitatively analyzed by HPLC. As a result, the yield of the compound (b 1 ) was 83%.
- Example 14 A mixed solution of the compound (a 1 ) and hexanoic acid was heated to 100 ° C., and a mixed gas of oxygen and nitrogen (oxygen concentration: 21%) was blown into the mixed solution at 10 mL / min. As a result of reaction tracking by HPLC, the production of the target compound (b 1 ) was not observed because it was below the detection limit.
- a halogen-containing pyrazole carboxylic acid useful as a pharmaceutical and agrochemical intermediate can be produced more simply and efficiently.
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Abstract
Description
特許文献1においては、水の存在下、下式(a1)で表される化合物と次亜塩素酸ナトリウムとを反応させて下式(b1)で表される化合物を得る方法が開示されている。
一方で、上記のような水溶液中では次亜塩素酸ナトリウムの濃度を高くできず、多量の水溶液を用いる必要がある。そのため、反応後の廃水処理に手間がかかり、工業的な観点からは望ましくない。
本発明は、医農薬中間体として有用なハロゲン含有ピラゾールカルボン酸をより簡便に効率よく製造でき、工業的に優れる製造方法の提供を課題とする。
すなわち、本発明は以下の発明を包含するものである。
(2) 遷移金属原子を含む化合物が、Mn、Co、Fe、Cu、又は、Niを含む化合物である、(1)に記載の製造方法。
(3) 遷移金属原子を含む化合物が、遷移金属の硝酸塩、遷移金属の硫酸塩、遷移金属の酢酸塩、遷移金属の炭酸塩、又は、遷移金属のリン酸塩である、(1)又は(2)に記載の製造方法。
(4) さらに、カルボン酸の存在下にて、式(a)で表される化合物と酸素とを反応させる、(1)~(3)のいずれかに記載の製造方法。
(5) さらに、硝酸、硝酸のアルカリ金属塩又は硝酸のアルカリ土類金属塩のいずれかの存在下にて、式(a)で表される化合物と酸素とを反応させる、(1)~(4)のいずれかに記載の製造方法。
(6) アルカリの存在下、式(a)で表される化合物と酸素とを反応させて、式(b)で表される化合物を得ることを特徴とする、式(b)で表される化合物の製造方法。
(7) 式(a)で表される化合物と酸素との反応後、さらに、酸を作用させる、(6)に記載の製造方法。
(8) さらに、有機溶媒の存在下にて、式(a)で表される化合物と酸素とを反応させる、(6)又は(7)に記載の製造方法。
(9) さらに、水の存在下にて、式(a)で表される化合物と酸素とを反応させる、(6)~(8)のいずれかに記載の製造方法。
(10) アルカリが、水酸化ナトリウム又は水酸化カリウムである、(6)~(9)のいずれかに記載の製造方法。
RFの具体例としては、モノハロメチル基(例、フルオロメチル基、クロロメチル基)、ジハロメチル基(例、ジフルオロメチル基、ジクロロメチル基)、トリハロメチル基(例、トリフルオロメチル基、ジクロロフルオロメチル基、クロロジフルオロメチル基)、モノハロエチル基(例、2-フルオロエチル基、2-クロロエチル基)及びジハロエチル基(例、2,2-ジフルオロエチル基、2,2-ジクロロエチル基)が挙げられる。
RFは、モノハロメチル基、ジハロメチル基又はトリハロメチル基が好ましく、ジハロメチル基又はトリハロメチル基がより好ましく、ジフルオロメチル基、ジクロロフルオロメチル基又はクロロジフルオロメチル基がさらに好ましく、ジフルオロメチル基が特に好ましい。
mは1又は2が好ましく、1がより好ましい。つまり、RHは、CH3又はC2H5が好ましく、CH3がより好ましい。
化合物Mの形態としては、遷移金属の硝酸塩、遷移金属の硫酸塩、遷移金属の酢酸塩、遷移金属の炭酸塩、遷移金属のリン酸塩、遷移金属の水酸化物、遷移金属のハロゲン化物(塩化物、臭化物、フッ化物等)、及び、遷移金属の酸化物が挙げられる。なお、化合物Mは、遷移金属イオンを含むイオン化合物とも言える。中でも、反応の転化率がより優れる観点から、遷移金属の硝酸塩、遷移金属の硫酸塩、遷移金属の酢酸塩、遷移金属の炭酸塩、又は、遷移金属のリン酸塩が好ましく、遷移金属の硝酸塩がより好ましく、Mn(NO3)2、Co(NO3)2、Fe(NO3)3、Cu(NO3)2、又は、Ni(NO3)2がさらに好ましく、Mn(NO3)2が特に好ましい。化合物Mは、水和物の形態で使用してもよい。
また、化合物Mは、1種を単独で使用してもよく、2種以上を組み合わせて使用してもよい。
化合物(a)と化合物Mとを混合する際には、両者を一括して混合してもよいし、化合物(a)及び化合物Mの一方を、他方に対して、分割して加えて、両者を混合してもよい。
カルボン酸は、カルボキシ基を1つ以上有するアルキルカルボン酸が好ましい。アルキルカルボン酸は、直鎖状であってもよく、分岐鎖状であってもよく、環状であってもよい。
アルキルカルボン酸は、炭素数1~10のアルキルカルボン酸が好ましい。
アルキルカルボン酸の具体例としては、酢酸、プロピオン酸、ブタン酸、ペンタン酸、ヘキサン酸、ヘプタン酸、オクタン酸、ピバル酸、3-メチルブタン酸及びシクロヘキサンカルボン酸が挙げられる。反応の収率が良好である点で、酢酸、ペンタン酸、ヘキサン酸又はオクタン酸がより好ましい。
カルボン酸の使用量は、反応の転化率の観点から、化合物(a)に対して1~1000質量倍が好ましく、副反応を抑制する観点から、1.2~100質量倍がより好ましく、2.0~30質量倍がより好ましい。
また、カルボン酸は、1種を単独で使用してもよく、2種以上を組み合わせて使用してもよい。
上記反応を、化合物M及びカルボン酸の存在下で実施する場合は、化合物(a)、化合物M及びカルボン酸の混合物に、酸素を供給することにより実施するのがよい。
硝酸のアルカリ金属塩を形成するアルカリ金属イオンとしては、Li+、Na+、K+、Rb+又はCs+が好ましく、反応性が良好であり、入手が容易である点から、Na+またはK+がより好ましい。
硝酸のアルカリ金属塩の具体例としては、Li(NO3)、Na(NO3)、K(NO3)、Rb(NO3)及びCs(NO3)が挙げられる。
硝酸のアルカリ土類金属塩を形成するアルカリ土類金属イオンとしては、Mg2+、Ca2+又はBa2+が好ましく、反応性が良好であり、入手が容易である点から、Ca2+がより好ましい。
硝酸のアルカリ土類金属塩の具体例としては、Mg(NO3)2、Ca(NO3)2及びBa(NO3)2が挙げられる。
硝酸のアルカリ金属塩又は硝酸のアルカリ土類金属塩の使用量は、反応の転化率の観点から、化合物(a)に対して0.001モル当量~1.0モル当量が好ましく、副反応を抑制する観点から、0.002モル当量~0.5モル当量がより好ましい。
上記反応を、化合物M、カルボン酸、及び硝酸、硝酸のアルカリ金属塩又は硝酸のアルカリ土類金属塩のいずれかの存在下で実施する場合は、化合物(a)、化合物M、カルボン酸、及び硝酸、硝酸のアルカリ金属塩又は硝酸のアルカリ土類金属塩のいずれかの混合物に、酸素を供給することにより実施するのがよい。
酸素の供給量は、化合物(a)1molに対して、反応の転化率の観点から、0.1ml/min以上が好ましく、経済性の観点から、300ml/min以下が好ましい。
反応後の系から化合物(b)を単離する方法としては、例えば、溶媒抽出及び晶析が挙げられる。
上記反応は、化合物(a)とアルカリとの混合物に、酸素を供給することにより実施するのがよい。
化合物(a)とアルカリとを混合する際には、両者を一括して混合してもよいし、化合物(a)及びアルカリの一方を、他方に対して、分割して加えて、両者を混合してもよい。
また、アルカリは、1種を単独で使用してもよく、2種以上を組み合わせて使用してもよい。
水の使用量は、反応の転化率の観点から、化合物(a)に対して、0.01モル当量以上が好ましく、副反応を抑制する観点から、500モル当量以下が好ましく、0.01~500モル当量がより好ましく、0.1~100モル当量がさらに好ましい。
上記反応を、アルカリ及び水の存在下で実施する場合は、化合物(a)、アルカリ及び水の混合物に、酸素を供給することにより実施するのがよい。
有機溶媒としては、極性有機溶媒が挙げられ、tert-ブタノール、tert-アミルアルコール、アセトニトリル、ジメチルホルムアミド、ジメチルアセトアミド、ジメチルスルホキシド、N,N’-ジメチルプロピレン尿素、スルホラン、1,3-ジメチル-2-イミダゾリジノン又はN-メチル-2-ピロリドンが好ましく、tert-ブタノール、tert-アミルアルコール、アセトニトリル、ジメチルホルムアミド、ジメチルアセトアミド、ジメチルスルホキシド又はN-メチル-2-ピロリドンがさらに好ましく、tert-ブタノール、tert-アミルアルコール、ジメチルホルムアミド、ジメチルスルホキシド又はN-メチル-2-ピロリドンが特に好ましい。この場合、化合物(a)の溶解性が向上し、効率的に反応が進行しやすい。
上記反応を、アルカリ及び有機溶媒の存在下で実施する場合は、化合物(a)、アルカリ及び有機溶媒の混合物に、酸素を供給することにより実施するのがよい。
酸素の供給量は、化合物(a)1molに対して、反応の転化率の観点から、0.1ml/min以上が好ましく、経済性の観点から、300ml/min以下が好ましい。
当該生成物は単離してから酸を作用させてもよいが、簡便性の観点から、単離せずに反応混合物をそのまま酸を作用させるのが好ましい。
上記酸の具体例としては、硫酸、塩化水素、塩酸及び硝酸が挙げられる。
生成物に上記酸を作用させる方法としては、生成物と上記酸とを混合する方法が挙げられる。
例1~13は実施例であり、例14は比較例である。結果を表1に示す。
硝酸マンガン(II)6水和物を硝酸鉄(III)9水和物(0.44g、化合物(a1)に対して20mol%)に変更した以外、実施例1と同様の手順に従って、化合物(b1)を得た。
硝酸マンガン(II)6水和物を硝酸コバルト(II)6水和物(0.32g、化合物(a1)に対して20mol%)に変更した以外、実施例1と同様の手順に従って、化合物(b1)を得た。
硝酸マンガン(II)6水和物を硝酸ニッケル(II)6水和物(0.31g、化合物(a1)に対して20mol%)に変更した以外、実施例1と同様の手順に従って、化合物(b1)を得た。
硝酸マンガン(II)6水和物を硝酸銅(II)3水和物(0.27g、化合物(a1)に対して20mol%)に変更した以外、実施例1と同様の手順に従って、化合物(b1)を得た。
ヘキサン酸を酢酸に変更した以外、実施例1と同様の手順に従って、化合物(b1)を得た。なお、HPLCによる定量分析より、化合物(b1)の収率は97%であった。
ヘキサン酸をペンタン酸に変更し、8時間の加熱時間を6時間に変更した以外、実施例1と同様の手順に従って、化合物(b1)を得た。なお、HPLCによる定量分析より、化合物(b1)の収率は97%であった。
ヘキサン酸をオクタン酸とし、混合液の加熱温度を100℃から110℃とし、8時間の加熱時間を10時間に変更する以外は、例1と同様の手順に従って、化合物(b1)を得た。HPLCによる定量分析をした結果、化合物(a1)の転化率は52%であり、化合物(b1)の収率は51%であった。
化合物(a1)(5.0g)、硝酸マンガン(II)6水和物(1.98g、化合物(a1)に対して20mol%)、オクタン酸(44g)とし、8時間の加熱時間を27時間に変更する以外は、例1と同様の手順に従って、化合物(b1)を得た。HPLCによる定量分析をした結果、化合物(a1)の転化率は98%であり、化合物(b1)の収率は90%であった。
化合物(a1)(6.0g)、硝酸マンガン(II)6水和物(1.65g、化合物(a1)に対して20mol%)、オクタン酸(53g)、70%硝酸(0.24g、化合物(a1)に対して20mol%)の混合液を100℃に加熱し、混合液中に酸素と窒素との混合ガス(酸素濃度:21%)を10ml/minで吹き込んだ。混合液を100℃で15時間加熱した後、HPLCによる定量分析をした結果、化合物(a1)の転化率は97%であり、化合物(b1)の収率は94%であった。
化合物(a1)(8.0g)、硝酸マンガン(II)6水和物(0.52g、化合物(a1)に対して4mol%)、オクタン酸(70g)、70%硝酸(0.63g、化合物(a1)に対して6mol%)とし、15時間の加熱時間を17時間に変更する以外は、例10と同様の手順に従って、化合物(b1)を得た。HPLCによる定量分析をした結果、化合物(a1)の転化率は97%であり、化合物(b1)の収率は97%であった。
化合物(a1)(1.0g)、水酸化ナトリウム(1.1g)、N-メチル-2-ピロリドン(135g)の混合液を40℃に加熱し、混合液中に酸素と窒素との混合ガス(酸素濃度:21%)を1500ml/minで吹き込んだ。HPLCによる反応追跡で目的物である化合物(b1)の生成を確認した。混合液を40℃で14時間加熱した後、HPLCによる定量分析をした結果、化合物(b1)の収率は69%であった。また、反応液からN-メチル-2-ピロリドンを減圧蒸留によって留去し、そこに水を加えて固体を溶解させ、さらにクロロホルムを加えて分液した。分液後の水層に、硫酸を加え、固体を析出させた後、ろ過し、固形分を回収した。固形分を水洗し、分析した結果、HPLC純度99%の化合物(b1)であることを確認した。
化合物(a1)(1.0g)、水酸化ナトリウム(0.92g)、N-メチル-2-ピロリドン(135g)、水(0.38g、化合物(a1)に対して4モル当量)の混合液を40℃に加熱し、混合液中に酸素と窒素との混合ガス(酸素濃度:21%)を100ml/minで吹き込んだ。HPLCによる反応追跡で目的物である化合物(b1)の生成を確認した。混合液を40℃で23時間加熱した後、HPLCによる定量分析をした結果、化合物(b1)の収率は80%であった。さらに、混合液を70℃で3時間加熱した後、HPLCによる定量分析をした結果、化合物(b1)の収率は83%であった。
化合物(a1)及びヘキサン酸の混合液を100℃に加熱し、混合液中に酸素と窒素との混合ガス(酸素濃度:21%)を10mL/minで吹き込んだ。HPLCによる反応追跡の結果、目的物である化合物(b1)の生成は検出限界以下のため観測されなかった。
Claims (10)
- 前記遷移金属原子を含む化合物が、Mn、Co、Fe、Cu、又は、Niを含む化合物である、請求項1に記載の製造方法。
- 前記遷移金属原子を含む化合物が、遷移金属の硝酸塩、遷移金属の硫酸塩、遷移金属の酢酸塩、遷移金属の炭酸塩、又は、遷移金属のリン酸塩である、請求項1又は2に記載の製造方法。
- さらに、カルボン酸の存在下にて、前記式(a)で表される化合物と酸素とを反応させる、請求項1~3のいずれか1項に記載の製造方法。
- さらに、硝酸、硝酸のアルカリ金属塩又は硝酸のアルカリ土類金属塩のいずれかの存在下にて、前記式(a)で表される化合物と酸素とを反応させる、請求項1~4のいずれか一項に記載の製造方法。
- 式(a)で表される化合物と酸素との反応後、さらに、酸を作用させる、請求項6に記載の製造方法。
- さらに、有機溶媒の存在下にて、式(a)で表される化合物と酸素とを反応させる、請求項6又は7に記載の製造方法。
- さらに、水の存在下にて、式(a)で表される化合物と酸素とを反応させる、請求項6~8のいずれか一項に記載の製造方法。
- 前記アルカリが、水酸化ナトリウム又は水酸化カリウムである、請求項6~9のいずれか一項に記載の製造方法。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2022513315A (ja) * | 2019-08-02 | 2022-02-07 | 宿遷市科莱博生物化学有限公司 | ハロゲン置換化合物およびその調製方法と適用 |
| JP7080407B2 (ja) | 2019-08-02 | 2022-06-03 | 宿遷市科莱博生物化学有限公司 | ハロゲン置換化合物およびその調製方法と適用 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2018180944A1 (ja) | 2020-02-06 |
| US20200010424A1 (en) | 2020-01-09 |
| EP3604283A4 (en) | 2020-09-09 |
| EP3604283A1 (en) | 2020-02-05 |
| KR20190132657A (ko) | 2019-11-28 |
| CN110461821A (zh) | 2019-11-15 |
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