CN114981482A - Method for producing epoxy compound - Google Patents

Method for producing epoxy compound Download PDF

Info

Publication number
CN114981482A
CN114981482A CN202080075921.8A CN202080075921A CN114981482A CN 114981482 A CN114981482 A CN 114981482A CN 202080075921 A CN202080075921 A CN 202080075921A CN 114981482 A CN114981482 A CN 114981482A
Authority
CN
China
Prior art keywords
epoxy compound
ion
formula
olefin
ions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202080075921.8A
Other languages
Chinese (zh)
Inventor
人见穣
北山健司
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daicel Corp
Doshisha Co Ltd
Original Assignee
Daicel Corp
Doshisha Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daicel Corp, Doshisha Co Ltd filed Critical Daicel Corp
Publication of CN114981482A publication Critical patent/CN114981482A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D301/00Preparation of oxiranes
    • C07D301/02Synthesis of the oxirane ring
    • C07D301/03Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
    • C07D301/12Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with hydrogen peroxide or inorganic peroxides or peracids
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D303/00Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
    • C07D303/02Compounds containing oxirane rings
    • C07D303/04Compounds containing oxirane rings containing only hydrogen and carbon atoms in addition to the ring oxygen atoms
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00Electrolytic production of inorganic compounds or non-metals
    • C25B1/01Products
    • C25B1/28Per-compounds
    • C25B1/30Peroxides
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B3/00Electrolytic production of organic compounds
    • C25B3/20Processes
    • C25B3/23Oxidation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Epoxy Compounds (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

Provided is a method for efficiently producing an epoxy compound by an electrochemical method. Disclosed is a method for producing an epoxy compound, wherein a salt represented by the following formula (a) is electrolytically oxidized in an aqueous phase to form a peracid ion represented by the following formula (b), and an olefin is oxidized by the peracid ion represented by the following formula (b) to obtain the corresponding epoxy compound. In the formula, R d Represents a group selected from a single bond, SO 2 A divalent radical of CO and P (═ O) OH, A + Represents an ion selected from alkali metal ionsAlkaline earth metal ions, ammonium ions, phosphonium ions and sulfonium ions.

Description

Method for producing epoxy compound
Technical Field
The present disclosure relates to a method of oxidizing an olefin to produce an epoxy compound using an electrochemical process. The present disclosure claims priority from Japanese patent application No. 2019-196508, filed in Japan on 10/29/2019, the contents of which are incorporated herein by reference.
Background
The epoxy compound reacts with various curing agents and curing catalysts to form a cured product having high strength, heat resistance, transparency, and the like. Therefore, the resin composition is extremely useful as a raw material for sealing materials, coating materials, adhesives, inks, sealing materials, and the like.
As a method for producing such an epoxy compound, non-patent document 1 describes that an organic layer-aqueous phase two-phase solvent containing a salen manganese complex and cis- β -methylstyrene as a matrix, dichloromethane and an aqueous sodium chloride solution is charged into an electrolytic cell provided with a pair of platinum electrodes, and the following reactions 1 to 3 are continuously performed by applying electricity, whereby an epoxy compound can be produced stereoselectively.
1. Hypochlorous acid is generated by electrolytic oxidation of sodium chloride in the aqueous phase.
2. Hypochlorous acid generated in the aqueous phase moves to the organic layer and oxidizes the salen manganese complex.
3. The oxidized salen manganese complex oxidizes cis-beta-methylstyrene to produce a cis-epoxy compound corresponding to cis-beta-methylstyrene.
Documents of the prior art
Non-patent literature
Non-patent document 1: tanaka, m.kuroboshi, h.takeda, h.kanda, s.torii, j.electroananal.chem.2001, 507,75-81.
Disclosure of Invention
Problems to be solved by the invention
However, in the above reaction, the epoxy compound is obtained in a yield of 80% or more, but it takes 16 hours or more, and therefore, it is necessary to increase the reaction rate.
In addition, since sodium chloride is used as an electrolyte in the above method, a chloride of olefin is by-produced. Therefore, it is inevitable to mix a chlorine compound into the epoxy compound, and for example, when a substance in which a chlorine compound is mixed into the epoxy compound is used for a sealing material of a printed circuit board or the like, the wiring (particularly copper wiring) of the printed circuit board is corroded by the chlorine compound, and thus there is a problem that long-term reliability is lowered. Further, the above problem is remarkable with the miniaturization and high density of electronic parts. In addition, chlorides of olefins have a large environmental burden, which is also a problem.
Accordingly, it is an object of the present disclosure to provide a method for efficiently manufacturing an epoxy compound using an electrochemical process.
It is another object of the present disclosure to provide a method for efficiently manufacturing an epoxy compound having a low chlorine content using an electrochemical process.
Technical scheme
As a result of intensive studies to solve the above problems, the present inventors have found that an olefin can be produced by subjecting a salt represented by the following formula (a) to electrolytic oxidation in water to oxidize the olefin using a generated peracid ion represented by the following formula (b), or by subjecting a salt represented by the following formula (a) to electrolytic oxidation in water to oxidize a metal complex using a generated peracid ion represented by the following formula (b) and oxidize the olefin using a metal oxo complex generated by oxidizing the metal complex, whereby the oxidation reaction of the olefin can be more efficiently carried out, the corresponding epoxy compound can be produced in a higher yield, and the epoxy compound having a low chlorine content can be produced without using sodium chloride in the reaction. The present disclosure has been completed based on these findings.
That is, the present disclosure provides a method for producing an epoxy compound, comprising electrolytically oxidizing a salt represented by the following formula (a) in an aqueous phase to generate a peracid ion represented by the following formula (b), and oxidizing an olefin with the generated peracid ion represented by the following formula (b) to obtain the corresponding epoxy compound.
[ chemical formula 1]
Figure BDA0003621007350000021
(in the formula, R d Represents a group selected from a single bond, SO 2 A divalent radical of CO and P (═ O) OH, A + Represents a cation selected from the group consisting of an alkali metal ion, an alkaline earth metal ion, an ammonium ion, a phosphonium ion and a sulfonium ion)
The present disclosure also provides a method for producing an epoxy compound, comprising electrolytically oxidizing a salt represented by the following formula (a) in an aqueous phase to generate a peracid ion represented by the following formula (b), oxidizing a metal complex with the generated peracid ion represented by the following formula (b) to generate a metal oxo complex, and oxidizing an olefin with the generated metal oxo complex to obtain a corresponding epoxy compound.
[ chemical formula 2]
Figure BDA0003621007350000031
(in the formula, R d Represents a group selected from a single bond, SO 2 A divalent radical of CO and P (═ O) OH, A + Represents a cation selected from the group consisting of an alkali metal ion, an alkaline earth metal ion, an ammonium ion, a phosphonium ion and a sulfonium ion)
The present disclosure also provides a method for producing the epoxy compound, wherein a metal complex, an olefin, a salt represented by the following formula (a), and water are charged in an electrolytic bath and an electric current is applied.
[ chemical formula 3]
Figure BDA0003621007350000032
(wherein R is d Represents a group selected from a single bond, SO 2 Divalent radicals of CO and P (═ O) OH, A + Represents a cation selected from the group consisting of an alkali metal ion, an alkaline earth metal ion, an ammonium ion, a phosphonium ion and a sulfonium ion)
The present disclosure also provides a method for producing the epoxy compound, wherein the concentration of the salt represented by the following formula (a) in the aqueous phase is 0.1 to 5 mol/L.
[ chemical formula 4]
Figure BDA0003621007350000033
(in the formula, R d Represents a group selected from a single bond, SO 2 A divalent radical of CO and P (═ O) OH, A + Represents a cation selected from the group consisting of an alkali metal ion, an alkaline earth metal ion, an ammonium ion, a phosphonium ion and a sulfonium ion)
The present disclosure also provides a method for producing the epoxy compound, wherein the electrolytic oxidation is performed in a two-phase solvent of an aqueous phase and an organic solvent phase.
Effects of the invention
According to the method for producing an epoxy compound of the present disclosure, the oxidation reaction rate of olefin can be increased as compared with the case of using the conventional method, and the corresponding epoxy compound can be efficiently produced.
In addition, in the method for producing an epoxy compound of the present disclosure, since sodium chloride is not required to be used as an electrolyte, the chlorine content of the obtained epoxy compound can be made extremely low. Therefore, the epoxy compound can be preferably used as a sealing material for a semiconductor or the like, and a semiconductor sealed with the epoxy compound can prevent corrosion of wiring due to chlorine, and thus can prevent occurrence of disconnection, insulation failure, and the like due to corrosion of wiring.
Therefore, the use of the epoxy compound can realize further miniaturization, higher density, higher reliability, and longer life of electronic parts.
Drawings
FIG. 1 is a diagram 1- (I) showing the results of gas chromatography analysis of the epoxy compound obtained in example 1 and a diagram 1- (II) showing the results of gas chromatography analysis of the epoxy compound obtained in comparative example 1.
FIG. 2 is a graph (2- (I) showing the results of gas chromatography analysis of the epoxy compound obtained in example 2 and a graph (2- (II) showing the results of gas chromatography analysis of the epoxy compound obtained in comparative example 2.
Detailed Description
[ Process for producing epoxy Compound ]
The method for producing an epoxy compound of the present disclosure is characterized by obtaining an epoxy compound through the following steps [1] and [2 ].
[1] Subjecting a salt represented by the following formula (a) (hereinafter, sometimes referred to as "salt (a)") to electrolytic oxidation in an aqueous phase to obtain a peracid ion represented by the following formula (b) (hereinafter, sometimes referred to as "peracid ion (b)");
[2] oxidizing the olefin with the generated peracid ion (b).
In addition, electrolytic oxidation is a method of obtaining an oxide by utilizing an anode reaction in electrolysis.
[ chemical formula 5]
Figure BDA0003621007350000051
(in the formula, R d Represents a group selected from a single bond, SO 2 A divalent radical of CO and P (═ O) OH, A + Is selected from alkali metal ions (such as sodium ion, potassium ion, etc.), alkaline earth metal ions (such as magnesium ion, calcium ion, etc.), ammonium ions (such as ammonium ion shown in the following formula (c) ("wherein four R's are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms)]) Phosphonium and sulfonium cations. )
[ chemical formula 6]
Figure BDA0003621007350000052
Examples of the salt (a) include sodium hydrogen carbonate, sodium hydrogen sulfate, and disodium hydrogen phosphate.
Examples of the peracid ion (b) include a percarbonate ion, a persulfate ion, and a perphosphate ion.
Comprising the step [1]And [2]]The following reaction is carried out in the method for producing an epoxy compound of (1). In addition, in the following reaction system, the olefin is represented by formula(s), and the corresponding epoxy compound is represented by formula (p). R in the formula d As described above.
[ chemical formula 7]
Figure BDA0003621007350000053
R in the above formula(s) 11 ~R 14 The same or different, represent a hydrogen atom, a hydrocarbon group or a heterocyclic group. R 11 And R 12 Or may be linked to each other to form a ring together with the adjacent carbon atoms. R is 13 And R 14 The same applies.
R in the above formula (p) 11 ~R 14 And R in the above formula(s) 11 ~R 14 And (7) corresponding.
The hydrocarbon group includes a saturated or unsaturated aliphatic hydrocarbon group, an alicyclic hydrocarbon group and an aromatic hydrocarbon group. Among the aliphatic hydrocarbon groups, a saturated or unsaturated aliphatic hydrocarbon group having 1 to 10 carbon atoms is preferable. Examples of the aliphatic hydrocarbon group include: alkyl groups having 1 to 10 carbon atoms such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, hexyl, decyl, and dodecyl groups; alkenyl groups having 1 to 10 carbon atoms such as vinyl, allyl, and 1-butenyl groups.
As the alicyclic hydrocarbon group, C is preferred 3-10 Examples of the alicyclic hydrocarbon group of (2) include: cycloalkyl groups such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and cyclooctyl; cycloalkenyl groups such as cyclopentenyl and cyclohexenyl; decahydronaphthalen-1-yl, norbornyl, adamantyl, tricyclo [5.2.1.0 2,6 ]Bridged hydrocarbon groups such as a decane-8-yl group.
As the aromatic hydrocarbon group, C is preferred 6-14 (particularly C) 6-10 ) Examples of the aromatic hydrocarbon group in (b) include a phenyl group and a naphthyl group.
The heterocyclic ring constituting the heterocyclic group includes aromatic heterocyclic rings and non-aromatic heterocyclic rings. Examples of such heterocyclic rings include 3 to 10-membered heterocyclic rings (preferably 4 to 6-membered heterocyclic rings) having carbon atoms and at least one kind of hetero atoms (for example, oxygen atom, sulfur atom, nitrogen atom, etc.) among atoms constituting the ring, and condensed rings thereof. The heterocyclic group is a group obtained by removing one hydrogen atom from the structural formula of the above-mentioned heterocycle.
As R 11 And R 12 Or R 13 And R 14 Rings which may be linked to each other and which form together with adjacent carbon atoms, for example C 3-10 Cycloolefin ring, C 6-14 Aromatic rings, heterocycles, and the like.
The olefin is a compound represented by the formula(s) wherein R is 11 And R 12 Is a hydrogen atom and R 13 And R 14 The compound which is bonded to each other and forms a cycloolefin ring together with the adjacent carbon atoms, that is, a cyclic olefin is preferable, a 3 to 10-membered cyclic olefin is particularly preferable, and a 5 to 8-membered cyclic olefin is particularly preferable.
In general, it is very difficult to directly electrolytically oxidize olefins by means of electrodes. Further, even if the olefin is oxidized, only radicals are generated, and an epoxy compound cannot be obtained. However, in the present disclosure, a salt (a) that is more easily oxidized than an olefin is electrolytically oxidized through an electrode to generate a peracid ion (b), and the olefin is oxidized using the generated peracid ion (b). Therefore, the progress of the oxidation reaction of the olefin can be promoted, and the corresponding epoxy compound can be efficiently produced.
In the present disclosure, since the oxidation reaction of the olefin proceeds as described above, the oxidation reaction rate of the olefin can be adjusted by adjusting the concentration of the salt (a) (or the cation represented by the above formula (a')) in the system (particularly in the aqueous system), and the reaction can be easily controlled. In addition, the peracid ion (b) is reduced by oxidizing the olefin, and the cation represented by the above formula (a ') is regenerated, but the regenerated cation represented by the above formula (a') can be used again for electrolytic oxidation. Therefore, the salt (a) is used only in an amount of the catalyst level relative to the olefin, contributing to a reduction in environmental load.
In the step [1], for example, an aqueous solution of the salt (a) is fed as an electrolytic solution to an electrolytic cell (preferably a non-diaphragm electrolytic cell) provided with a pair of electrodes, and the cell is energized (specifically, a voltage is applied and a current is applied).
Examples of the electrode include a platinum electrode, a conductive diamond (e.g., boron-doped diamond, nitrogen-doped diamond, etc.) electrode, and a graphite electrode.
The applied voltage is, for example, 5 to 10V. Under the condition of constant current, the applied voltage is 3-30 mA/cm 2
For example, when an electrolytic cell charged with an aqueous solution of sodium bicarbonate as the aqueous solution of the salt (a) is energized, sodium bicarbonate is electrolyzed at the anode (the electrode where electrochemical oxidation occurs, i.e., the anode). Then, a percarbonate ion is generated by the reaction shown in the following formula (1). The percarbonate ion corresponds to the peracid ion (b).
NaHCO 3 +H 2 O→HCO 4 - +Na + +2H + +2e - (1)
The electrolyte solution of the present disclosure contains at least a salt (a) as an electrolyte. The concentration of the salt (a) in the aqueous phase is, for example, 0.1 to 5mol/L, preferably 0.1 to 2.8mol/L, more preferably 0.5 to 2mol/L, particularly preferably 0.8 to 1.4mol/L, and most preferably 1.0 to 1.2 mol/L.
The supply molar ratio (former/latter) of the olefin and the salt (a) to the reaction system is, for example, 1/1000 to 1000/1, preferably 1/100 to 100/1, and particularly preferably 1/10 to 10/1.
The electrolyte solution may contain other electrolytes (for example, carbonates such as sodium carbonate or halides such as sodium chloride) in addition to the salt (a), and the content of the other electrolytes (the total content thereof in the case of containing 2 or more species) is, for example, 95 mol% or less of the total amount of electrolytes contained in the electrolyte solution, and is preferably 80 mol% or less, more preferably 70 mol% or less, more preferably 60 mol% or less, further preferably 50 mol% or less, particularly preferably 40 mol% or less, most preferably 20 mol% or less, and particularly preferably 15 mol% or less, from the viewpoint of excellent effect of promoting the oxidation reaction of olefins.
The electrolyte can be produced by mixing the salt (a), an acid, and water, for example. Examples of the acid include nitric acid, sulfuric acid, and phosphoric acid. The mixing amount of the acid is within the range of about 0 to 12 of the pH value of the electrolyte.
The pH of the electrolyte is preferably appropriately changed depending on the kind of the salt (a). For example, in the use of carbonWhen sodium hydrogen carbonate is used as the salt (a), the pH is preferably set to bicarbonate ion (HCO) in the electrolyte 3 - ) The concentration of (3) is in a range of 4 to 12, preferably 5 to 11, more preferably 6 to 11, and most preferably 6.3 to 10.5.
By the above-mentioned step [1]Generated peracid ion (b) [ for example, in the case of using sodium hydrogencarbonate as the salt (a), percarbonate ion (HCO) 4 - )]In the step [2]Is used as an oxidizing agent. Then, the peracid ion (b) oxidizes an olefin (compound represented by formula (s)) to generate a corresponding epoxy compound (compound represented by formula (p)).
In the reaction system, the olefin may be dispersed in an aqueous solution containing the salt (a). The olefin may be mixed with the aqueous solution containing the salt (a) in a state of being dissolved in the solvent, or the solvent in which the olefin is dissolved may be separated from the aqueous solution containing the salt (a).
Examples of the solvent for dissolving the olefin include: halogenated hydrocarbons such as carbon tetrachloride, chloroform, dichloromethane, 1, 2-dichloroethane, dichlorobenzene, and the like; hydrocarbons such as hexane and toluene; amides such as N, N-dimethylformamide and N, N-dimethylacetamide; nitriles such as acetonitrile, propionitrile, and benzonitrile; and esters such as ethyl acetate and butyl acetate. These may be used singly or in combination of two or more.
For example, when a water-insoluble organic solvent (i.e., an organic solvent insoluble in water) is used as the solvent for dissolving the olefin, the aqueous solution containing the salt (a) and the water-insoluble organic solvent are separated without mixing to form a two-phase system, but when electrolytic oxidation is performed in the two-phase system, the reaction in the step [1] proceeds in the aqueous phase. Then, the peracid ion (b) generated in the step [1] is transferred to a water-insoluble organic solvent phase, and the reaction in the step [2] is carried out in the water-insoluble organic solvent phase. Therefore, by bringing the electrode into contact with only the aqueous phase, the oxidation reaction can be carried out only in the aqueous phase, and a side reaction in which the organic compound is oxidized on the electrode surface can be suppressed.
As described above, the reaction in the steps [1] and [2] is preferably carried out in a two-phase solvent of an aqueous phase containing the salt (a) and an aqueous phase/organic solvent phase of a water-insoluble organic solvent for dissolving the olefin, whereby a high-purity epoxy compound can be produced.
The method for producing an epoxy compound of the present disclosure may be a method in which a salt (a) which is more easily oxidized than an olefin is electrolytically oxidized using an electrode to generate a peracid ion (b), the generated peracid ion (b) is used to first oxidize a metal complex to generate a metal oxo complex, and then the generated metal oxo complex is used to oxidize the olefin. That is, a method of obtaining an epoxy compound by oxidizing an olefin in the following step [4] using a metal oxo complex produced in the following steps [1] and [3 ].
[1] The salt (a) is electrolytically oxidized in the aqueous phase to form the peracid ion (b).
[3] Oxidizing the metal complex with the generated peracid ion (b) to generate a metal oxo complex.
[4] The resulting metal oxo complex is used to oxidize an olefin.
Comprises the following step [1]、[3]And [4]The process for producing an epoxy compound according to (1), wherein the following reaction is carried out. In the following reaction system, the olefin is represented by formula(s) and the corresponding epoxy compound is represented by formula (p). In addition, R in the following formula d 、R 11 ~R 14 As described above.
[ chemical formula 8]
Figure BDA0003621007350000091
In the above reaction system, the salt (a) releases electrons on the electrode surface to generate the peracid ion (b), and the metal complex (L-M) is oxidized by the generated peracid ion (b) to generate the metal oxo complex (L-M ═ O). Then, the generated metal oxo complex (L-M ═ O) accelerates the oxidation reaction of the olefin represented by the formula(s).
Then, the metal oxo complex (L-M ═ O) is reduced by oxidizing the olefin, and the metal oxo complex (L-M) is regenerated, but the regenerated metal oxo complex (L-M) can be reused for electrolytic oxidation in the same manner as the salt (a). Therefore, the amount of the metal complex to be used may be an amount of the olefin to the extent of the catalyst, and this contributes to reduction of the environmental load.
In the process for producing an epoxy compound through the above steps [1] and [2], if the concentration of the salt (a) in the aqueous phase is increased, the rate of progress of the olefin oxidation reaction can be increased. However, if the concentration of the salt (a) is increased, the concentration of the peracid ion (b) increases, and the risk of explosion or the like increases. Therefore, there is a limit to increase the salt (a) concentration to increase the oxidation reaction rate of the olefin. On the other hand, in the method for producing an epoxy compound through the steps [1], [3] and [4], by using the salt (a) and the metal complex in combination, the oxidation reaction rate of the olefin can be increased by the catalytic action of the metal complex without excessively increasing the concentration of the salt (a), and the yield of the epoxy compound can be safely increased.
Examples of the metal complex include metal complexes containing a ligand selected from the group consisting of salen-based ligands, 1,4, 7-triazacyclononane-based ligands, porphyrin-based ligands, quinoline-based ligands, pyridine-based ligands, and acyloxy groups. When the ligand has a stereoisomer, it may be either of S type or R type.
Examples of the metal element constituting the metal complex include Sc, Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, Ru, Rh, Pd, W, Re, Ir, and Pt. Among them, from the viewpoint of excellent effect of promoting the oxidation reaction of the olefin, a metal element selected from Ti, Cr, Mn, Fe, Co, Mo, and W is preferable, and a metal element selected from Ti, Mn, Mo, and W is particularly preferable.
Among these ligands, from the viewpoint of excellent effect of promoting the oxidation reaction of an olefin, a Salen-based ligand or a 1,4, 7-triazacyclonane-based ligand is preferable, and a Salen-based ligand is particularly preferable.
The metal complex containing a salen-based ligand is represented by the following formula (L-1), for example.
[ chemical formula 9]
Figure BDA0003621007350000101
(in the formula, R 1 ~R 10 The same or different, and is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms. Is selected from R 1 ~R 4 The 2 groups (2) may be bonded to each other to form a ring together with the adjacent carbon atom. R is 5 、R 6 Or may be linked to each other to form a ring together with the adjacent carbon atoms. Is selected from R 7 ~R 10 The 2 groups (2) may be bonded to each other to form a ring together with the adjacent carbon atoms. M represents a metal element, and X represents a halogen atom or an acyloxy group. )
Examples of the alkyl group having 1 to 5 carbon atoms include: and linear or branched alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, and pentyl.
As selected from R 1 ~R 4 Or R 7 ~R 10 The two groups (a) may be bonded to each other to form a ring together with adjacent carbon atoms, for example, a cycloolefin ring having 3 to 8 carbon atoms such as a cyclopentene ring and a cyclohexene ring. Further, as R 5 、R 6 And a ring which is formed together with adjacent carbon atoms and can be linked to each other, for example, a cycloalkane ring having 3 to 8 carbon atoms such as a cyclopentane ring or a cyclohexane ring.
The halogen atom in X is, for example, a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom.
Examples of the acyloxy group include a group represented by an [ R 'COO group ] (wherein R' is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms) such as a formate group, an acetate group, a propionate group, and a butyrate group.
The 1,4, 7-triazacyclononane-based ligand is represented by the following formula (L-2), for example.
[ chemical formula 10]
Figure BDA0003621007350000111
(in the formula, R 20 ~R 22 The same or different may have a substituent, and represents a monovalent hydrocarbon groupA monovalent heterocyclic group, or a monovalent group in which two or more of the above groups are bonded via a linking group. R 23 ~R 25 The monovalent hydrocarbon group may have a substituent, a monovalent heterocyclic group, or a monovalent group in which two or more of the above groups are bonded via a linking group. Is selected from R 20 ~R 25 May be bonded to each other to form a ring together with the nitrogen or carbon atom to which they are attached. )
At R 20 ~R 22 The hydrocarbon group in (1) includes a linear or branched aliphatic hydrocarbon group, alicyclic hydrocarbon group and aromatic hydrocarbon group.
Examples of the substituent which the group may have include a halogen atom, a hydroxyl group, a carboxyl group, a sulfo group, a nitro group, a phosphoric acid group and the like.
Examples of the linking group include: carbonyl (-CO-), ether bond (-O-), thioether bond (-S-), ester bond (-COO-), amide bond (-CONH-), and the like.
As selected from the group consisting of the R 20 ~R 25 A ring which is bonded to each other and may be formed together with the nitrogen atom or the carbon atom to which they are bonded, and examples thereof include alicyclic rings such as cyclopentane ring and cyclohexane ring; heterocyclic rings containing nitrogen atoms or the like as hetero atoms, and the like.
In the reaction system, the above metal complex may be present as a heterogeneous catalyst or may be present as a homogeneous catalyst. That is, the metal complex may be dispersed in a solvent (in an organic solvent in the case of electrolytic oxidation in a two-phase solvent of an aqueous phase and an organic solvent phase), and may be present as a homogeneous catalyst in a state of being supported on a carrier (for example, silica, alumina, zeolite, activated carbon, or the like) or in a state of being held on an electrode.
When the salt (a) and the metal complex are used together, the supply molar ratio (former/latter) of the olefin and the salt (a) in the reaction system is, for example, 1/1000 to 1000/1, preferably 1/100 to 100/1, and particularly preferably 1/10 to 10/1.
When the salt (a) and the metal complex are used together, the supply molar ratio (former/latter) of the olefin and the metal complex to the reaction system is, for example, 1/10 to 100000/1, preferably 1/1 to 1000/1, and particularly preferably 10/1 to 1000/1.
For example, when the reaction through the steps [1], [3] and [4] is performed by electrolytic oxidation in a two-phase solvent comprising an aqueous phase of the salt (a) and a water-insoluble organic solvent containing a metal complex, the reaction of the step [1] proceeds in the aqueous phase. Then, the peracid ion (b) generated in the step [1] is transferred to a water-insoluble organic solvent phase, and the reactions in the steps [3] to [4] are carried out in the organic solvent phase. Therefore, by bringing the electrode into contact with only the aqueous phase, the oxidation reaction can be carried out only in the aqueous phase, and a side reaction in which the organic compound is oxidized on the electrode surface can be suppressed.
As described above, the reaction through steps [1], [3] and [4] is preferably carried out in a two-phase solvent comprising an aqueous phase of the salt (a) and a water-insoluble organic solvent containing a metal complex, from the viewpoint of producing a high-purity epoxy compound.
According to the method for producing an epoxy compound of the present disclosure, an olefin can be efficiently oxidized to selectively produce a corresponding epoxy compound. For example, the yield of the epoxy compound when a voltage of 2.5V (vs. ag/AgCl) is applied for 30 minutes is, for example, 3% or more, preferably 4% or more. The yield of the epoxy compound when a voltage of 2.5V (vs. ag/AgCl) is applied for 14 hours is, for example, 30% or more.
Further, according to the method for producing an epoxy compound of the present disclosure, an epoxy compound having a low chlorine content can be produced. The chlorine content is, for example, 3000ppm or less, preferably 100ppm or less, particularly preferably 50ppm or less, and most preferably 1ppm or less, based on the total amount of the epoxy compound.
The epoxy compound obtained by the method for producing an epoxy compound of the present disclosure has a low chlorine content as described above, and thus can be preferably used as a sealing material for a printed circuit board or the like.
Further, when the epoxy compound obtained by the production method of the present disclosure is used as a sealing material, the problem of corrosion of wiring due to chlorine does not occur, and therefore, further downsizing, high density, high reliability, and long life of electronic parts can be achieved.
As described above, the respective configurations and combinations of the respective configurations of the present disclosure are examples, and addition, omission, replacement, and change of appropriate configurations may be made within the scope not departing from the gist of the present disclosure. The present disclosure is not limited by the embodiments, but is limited only by the description of the patent claims.
Examples
Hereinafter, the present disclosure will be described more specifically with reference to examples, but the present disclosure is not limited to these examples.
Example 1
In a one-compartment type electrolytic cell without a diaphragm, a two-phase solvent was added, which was added as an aqueous phase 84.01g of NaHCO 3 2.25mL of an aqueous sodium bicarbonate solution (1mol/L) obtained by dissolving the aqueous sodium bicarbonate solution in 1000mL of water was added CH as an organic phase 2 Cl 2 0.75mL, 32mg (0.05mmol) of Salen manganese complex (represented by the following formula (L-1-1), (S, S) - (+) -N, N' -bis (3, 5-di-t-butylsalicylidene) -1, 2-cyclohexanediaminommanganese (III) chloride) and 110mg (1mmol) of cyclooctene as a substrate were further added, and electrolytic oxidation was carried out under the following conditions under the application of a voltage of 2.5V for 30 minutes. The identification of the reaction products and the determination of the product yields were carried out using gas chromatography. Nitrobenzene was used as the internal standard substance (IS). The results of gas chromatography are shown in FIG. 1- (I).
< electrolytic Oxidation conditions >
Reference electrode: silver/silver chloride
Anode: boron-doped diamond
Cathode: platinum (II)
[ chemical formula 11]
Figure BDA0003621007350000141
Comparative example 1
The procedure of example 1 was repeated, except that an aqueous sodium chloride solution (1mol/L) was used instead of the aqueous sodium hydrogencarbonate solution. The results of the gas chromatography are shown in FIG. 1- (II).
The results are shown in the following table.
[ Table 1]
Aqueous phase Yield of epoxy Compound (%) Chlorine content (ppm)
Example 1 NaHCO 3 3.4 0
Comparative example 1 NaCl 2.5 5000
Example 2
The procedure of example 1 was repeated except that the substrate was changed to cyclohexene 82mg (1 mmol). The results of the gas chromatography are shown in FIG. 2- (I).
Comparative example 2
The procedure of example 2 was repeated, except that an aqueous sodium chloride solution (1mol/L) was used in place of the aqueous sodium hydrogencarbonate solution. The results of the gas chromatography are shown in FIG. 2- (II).
The results are shown in the following table.
[ Table 2]
Aqueous phase Yield of epoxy Compound (%) Chlorine content (ppm)
Example 2 NaHCO 3 4.1 0
Comparative example 2 NaCl 2.5 8000
Example 3
The reaction was carried out in the same manner as in example 1, except that the reaction time was changed to 14 hours.
The results are shown in the following table.
[ Table 3]
Application time (h) Yield of epoxy Compound (%) Chlorine content (ppm)
Example 1 0.5 3.4 0
Example 3 14 34 0
As a summary of the above, the following description will be given of the configuration of the present disclosure and its variations.
[1] A process for producing an epoxy compound, which comprises subjecting a salt represented by the formula (a) to electrolytic oxidation in an aqueous phase to form a peracid ion represented by the formula (b), and oxidizing an olefin with the formed peracid ion represented by the formula (b) to obtain the corresponding epoxy compound.
[2] The process for producing an epoxy compound according to [1], wherein the olefin is a cyclic olefin.
[3] A process for producing an epoxy compound, which comprises subjecting a salt represented by the formula (a) to electrolytic oxidation in an aqueous phase to form a peracid ion represented by the formula (b), and oxidizing an olefin represented by the formula(s) with the peracid ion represented by the formula (b) to obtain an epoxy compound represented by the formula (p).
[4]According to [3]The process for producing an epoxy compound, wherein the olefin represented by the formula(s) is a compound represented by the formula(s) wherein R is 11 And R 12 Is a hydrogen atom, and R 13 And R 14 A compound bonded to each other to form a cycloolefin ring together with an adjacent carbon atom.
[5] A process for producing an epoxy compound, which comprises subjecting a salt represented by the formula (a) to electrolytic oxidation in an aqueous phase to produce a peracid ion represented by the formula (b), oxidizing a metal complex with the produced peracid ion represented by the formula (b) to produce a metal oxo complex, and oxidizing an olefin with the produced metal oxo complex to obtain the corresponding epoxy compound.
[6] The process for producing an epoxy compound according to [5], wherein the olefin is a cyclic olefin.
[7] The method for producing an epoxy compound according to [5] or [6], wherein the metal complex contains at least one metal element selected from Sc, Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, Ru, Rh, Pd, W, Re, Ir, and Pt, and at least one ligand selected from a Salen-based ligand, a 1,4, 7-triazacyclononane-based ligand, a porphyrin-based ligand, a quinoline-based ligand, a pyridine-based ligand, and an acyloxy group.
[8] The process for producing an epoxy compound according to [5] or [6], wherein the metal complex is a metal complex represented by the formula (L-1) or (L-2).
[9] The method for producing an epoxy compound according to any one of [5] to [8], wherein the metal complex, the olefin, the salt represented by the formula (a), and water are charged into an electrolytic cell and electrified.
[10] The process for producing an epoxy compound according to any one of [1] to [9], wherein the concentration of the salt represented by the formula (a) in the aqueous phase is 0.1 to 5 mol/L.
[11] The process for producing an epoxy compound according to any one of [1] to [10], wherein the content of the electrolyte other than the salt represented by the formula (a) in the aqueous phase is 40 mol% or less of the total amount of the electrolyte contained in the aqueous phase.
[12] The method for producing an epoxy compound according to any one of [1] to [11], wherein the salt represented by the formula (a) is at least one salt selected from sodium hydrogencarbonate, sodium hydrogensulfate and disodium hydrogenphosphate.
[13] The method for producing an epoxy compound according to any one of [1] to [12], wherein the peracid ion represented by the formula (b) is at least one ion selected from the group consisting of a percarbonate ion, a persulfate ion and a perphosphate ion.
[14] The process according to any one of [1] to [13], which comprises subjecting the epoxy compound to electrolytic oxidation in a two-phase solvent comprising an aqueous phase and an organic solvent phase.
[15] The method for producing an epoxy compound according to any one of [1] to [14], wherein the salt represented by the formula (a) is electrolytically oxidized in an aqueous phase to generate a peracid ion represented by the formula (b), and an olefin is oxidized in an organic solvent phase by the peracid ion represented by the formula (b) to obtain the corresponding epoxy compound.
[16] The process for producing an epoxy compound according to any one of [1] to [15], wherein the molar ratio (former/latter) of the olefin to the salt represented by the formula (a) in the reaction system is 1/1000 to 1000/1.
[17] The process for producing an epoxy compound according to any one of [5] to [16], wherein a supply molar ratio (former/latter) of the olefin to the metal complex in the reaction system is 1/10 to 100000/1.
[18] The process for producing an epoxy compound according to any one of [1] to [17], wherein the chlorine content of the obtained epoxy compound is 3000ppm or less.
Industrial applicability of the invention
According to the method for producing an epoxy compound of the present disclosure, the oxidation reaction rate of an olefin can be increased, and a corresponding epoxy compound can be efficiently produced.
Therefore, the epoxy compound obtained by the above-mentioned production method has an extremely low chlorine content and can be suitably used as a sealing material for semiconductors and the like.

Claims (5)

1. A process for producing an epoxy compound, which comprises subjecting a salt represented by the following formula (a) to electrolytic oxidation in an aqueous phase to form a peracid ion represented by the following formula (b), oxidizing an olefin with the peracid ion represented by the following formula (b) to obtain a corresponding epoxy compound,
[ chemical formula 1]
Figure FDA0003621007340000011
In the formula, R d Represents a group selected from a single bond, SO 2 CO and P (═ O) OH, a + represents a cation selected from the group consisting of alkali metal ions, alkaline earth metal ions, ammonium ions, phosphonium ions and sulfonium ions.
2. A process for producing an epoxy compound, which comprises subjecting a salt represented by the following formula (a) to electrolytic oxidation in an aqueous phase to form a peracid ion represented by the following formula (b), oxidizing a metal complex with the generated peracid ion represented by the following formula (b) to form a metal oxo complex, and oxidizing an olefin with the formed metal oxo complex to obtain a corresponding epoxy compound,
[ chemical formula 2]
Figure FDA0003621007340000012
In the formula, R d Represents a group selected from a single bond, SO 2 CO and P (═ O) OH, a + represents a cation selected from the group consisting of alkali metal ions, alkaline earth metal ions, ammonium ions, phosphonium ions and sulfonium ions.
3. The method for producing an epoxy compound according to claim 2, wherein the metal complex, the olefin, the salt represented by the following formula (a), and water are charged in an electrolytic bath and an electric current is applied,
[ chemical formula 3]
Figure FDA0003621007340000013
In the formula, R d Represents a group selected from a single bond, SO 2 CO and P (═ O) OH, a + represents a cation selected from the group consisting of alkali metal ions, alkaline earth metal ions, ammonium ions, phosphonium ions and sulfonium ions.
4. The method for producing an epoxy compound according to any one of claims 1 to 3, wherein the concentration of the salt represented by the following formula (a) in the aqueous phase is 0.1 to 5mol/L,
[ chemical formula 4]
Figure FDA0003621007340000021
In the formula, R d Represents a group selected from a single bond, SO 2 A divalent radical of CO and P (═ O) OH, A + Represents a cation selected from the group consisting of an alkali metal ion, an alkaline earth metal ion, an ammonium ion, a phosphonium ion and a sulfonium ion.
5. The method for producing an epoxy compound according to any one of claims 1 to 4, wherein the electrolytic oxidation is performed in a two-phase solvent of an aqueous phase and an organic solvent phase.
CN202080075921.8A 2019-10-29 2020-10-21 Method for producing epoxy compound Pending CN114981482A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2019196508A JP7327758B2 (en) 2019-10-29 2019-10-29 Method for producing epoxy compound
JP2019-196508 2019-10-29
PCT/JP2020/039561 WO2021085268A1 (en) 2019-10-29 2020-10-21 Method for producing epoxy compound

Publications (1)

Publication Number Publication Date
CN114981482A true CN114981482A (en) 2022-08-30

Family

ID=75712602

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202080075921.8A Pending CN114981482A (en) 2019-10-29 2020-10-21 Method for producing epoxy compound

Country Status (4)

Country Link
JP (1) JP7327758B2 (en)
CN (1) CN114981482A (en)
TW (1) TW202124402A (en)
WO (1) WO2021085268A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5974285A (en) * 1982-10-19 1984-04-26 Asahi Chem Ind Co Ltd Method for epoxidizing hexafluoropropylene
US4490222A (en) * 1982-04-30 1984-12-25 Imperial Chemical Industries Plc Preparation of selected epoxides
US5329024A (en) * 1993-03-30 1994-07-12 National Starch And Chemical Investment Holding Corporation Epoxidation of olefins via certain manganese complexes
JPH09249984A (en) * 1996-03-13 1997-09-22 Otsuka Chem Co Ltd Production of optically active epoxide derivative
JP2003340286A (en) * 2002-05-23 2003-12-02 Kao Corp Epoxidizing catalyst
CN102877086A (en) * 2012-09-13 2013-01-16 华南理工大学 Method for preparing cyclic carbonate from olefin and carbon dioxide by electrochemical method
CN105745195A (en) * 2013-11-15 2016-07-06 康宁股份有限公司 Alkylene oxide synthesis

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS496285A (en) * 1972-05-22 1974-01-19
JPH05213919A (en) * 1992-02-04 1993-08-24 Tosoh Corp Epoxidization of alicyclic olefin
JP3269256B2 (en) * 1994-05-11 2002-03-25 住友化学工業株式会社 Method for simultaneous production of epoxy compound and phenol compound
JP4306859B2 (en) * 1999-03-02 2009-08-05 ペルメレック電極株式会社 Process for producing 1,2-diols and equivalents thereof
JP5506074B2 (en) * 2008-06-20 2014-05-28 国立大学法人大阪大学 Method for producing epoxy compound
EP3024581B1 (en) * 2013-07-24 2023-11-15 Basf Se Regeneration of a titanium containing zeolite

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490222A (en) * 1982-04-30 1984-12-25 Imperial Chemical Industries Plc Preparation of selected epoxides
JPS5974285A (en) * 1982-10-19 1984-04-26 Asahi Chem Ind Co Ltd Method for epoxidizing hexafluoropropylene
US5329024A (en) * 1993-03-30 1994-07-12 National Starch And Chemical Investment Holding Corporation Epoxidation of olefins via certain manganese complexes
JPH09249984A (en) * 1996-03-13 1997-09-22 Otsuka Chem Co Ltd Production of optically active epoxide derivative
JP2003340286A (en) * 2002-05-23 2003-12-02 Kao Corp Epoxidizing catalyst
CN102877086A (en) * 2012-09-13 2013-01-16 华南理工大学 Method for preparing cyclic carbonate from olefin and carbon dioxide by electrochemical method
CN105745195A (en) * 2013-11-15 2016-07-06 康宁股份有限公司 Alkylene oxide synthesis

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HIDEO TANAKA ET AL: "Electrochemical asymmetric epoxidation of olefins by using an optically active Mn-salen complex", JOURNAL OF ELECTROANALYTICAL CHEMISTRY, vol. 507, pages 75 *
HO KAM PIU: "Some New Approaches to Alkene Epoxidation with Manganese Catalyst", 香港理工大学 博士学位论文, pages 1 - 236 *

Also Published As

Publication number Publication date
JP2021070835A (en) 2021-05-06
TW202124402A (en) 2021-07-01
JP7327758B2 (en) 2023-08-16
WO2021085268A1 (en) 2021-05-06

Similar Documents

Publication Publication Date Title
KR20200004163A (en) Bimetalic sulfide catalyst for electro-fenton reaction system, electrode comprising the same and electro-fenton reaction system using the same
KR20060108201A (en) Insoluble anode
CN107987279A (en) Utilize the method for the Janus microballoons of ionic liquid bi-polar electrochemical synthesis petal-shaped Metal-organic frame ZIF-8
KR20140073180A (en) electrode assembly for hydrogen peroxide generation and Electrochemical system for hydrogen peroxide generation
CN114981482A (en) Method for producing epoxy compound
US6869519B2 (en) Electrolytic process for the production of metallic copper and apparatus therefor
CN1132115A (en) Galvano-chemistry prepn. method of catalyst on basis of transition metal and phosphine
KR102331686B1 (en) Electrochemical process of converting carbon dioxide to oxalic acid
WO2011024327A1 (en) Method for producing carbonic acid diester
Felix-Navarro et al. Cyanide degradation by direct and indirect electrochemical oxidation in electro-active support electrolyte aqueous solutions
JP2017171963A (en) Electrode for carbon dioxide reduction and carbon dioxide reduction device
US3394059A (en) Electrolytic preparation of olefin oxides
US9435042B2 (en) System and method for selective electrochemical reduction of carbon dioxide employing an anodized silver electrode
JPH1180069A (en) Oxidation
Weinberg Electrosynthesis technology
EP0078178B1 (en) Hydration of nitriles
CA1271490A (en) Oxidation of organic compounds using thallium ions
Vaze et al. Indirect oxidation of o-chlorotoluene to o-chlorobenzaldehyde
US4313803A (en) Electrochemical maintenance of optimum catalytic activity in copper-catalyzed nitrile hydrolysis processes
US4381977A (en) Electrochemical maintenance of optimum catalytic activity in copper-catalyzed nitrile hydrolysis processes
JP2009035442A (en) Method for processing diamond
KR102481048B1 (en) Electrochemical process for conversion to alkali-oxalate
WO2005052219A1 (en) Apparatus and method for the reduction of metals
Socha et al. Electrochemical treatment of dilute cyanide solutions containing zinc complexes by oxidation at carbon felt (Sigratherm)
Liao et al. Photoelectrochemical water oxidation for on-site production of hydrogen peroxide

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination