WO2010050392A1 - アルコキシカルボニルフルオロアルカンスルホン酸塩類の製造方法 - Google Patents
アルコキシカルボニルフルオロアルカンスルホン酸塩類の製造方法 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C313/00—Sulfinic acids; Sulfenic acids; Halides, esters or anhydrides thereof; Amides of sulfinic or sulfenic acids, i.e. compounds having singly-bound oxygen atoms of sulfinic or sulfenic groups replaced by nitrogen atoms, not being part of nitro or nitroso groups
- C07C313/02—Sulfinic acids; Derivatives thereof
- C07C313/04—Sulfinic acids; Esters thereof
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- C07—ORGANIC CHEMISTRY
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- C07C211/00—Compounds containing amino groups bound to a carbon skeleton
- C07C211/01—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to acyclic carbon atoms
- C07C211/02—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
- C07C211/03—Monoamines
- C07C211/05—Mono-, di- or tri-ethylamine
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- C07C211/00—Compounds containing amino groups bound to a carbon skeleton
- C07C211/01—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to acyclic carbon atoms
- C07C211/02—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
- C07C211/03—Monoamines
- C07C211/07—Monoamines containing one, two or three alkyl groups, each having the same number of carbon atoms in excess of three
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- C07C211/00—Compounds containing amino groups bound to a carbon skeleton
- C07C211/62—Quaternary ammonium compounds
- C07C211/63—Quaternary ammonium compounds having quaternised nitrogen atoms bound to acyclic carbon atoms
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/02—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/02—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof
- C07C303/22—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof from sulfonic acids, by reactions not involving the formation of sulfo or halosulfonyl groups; from sulfonic halides by reactions not involving the formation of halosulfonyl groups
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- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/42—Separation; Purification; Stabilisation; Use of additives
- C07C303/44—Separation; Purification
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
- C07C309/01—Sulfonic acids
- C07C309/02—Sulfonic acids having sulfo groups bound to acyclic carbon atoms
- C07C309/03—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
- C07C309/17—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing carboxyl groups bound to the carbon skeleton
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C313/00—Sulfinic acids; Sulfenic acids; Halides, esters or anhydrides thereof; Amides of sulfinic or sulfenic acids, i.e. compounds having singly-bound oxygen atoms of sulfinic or sulfenic groups replaced by nitrogen atoms, not being part of nitro or nitroso groups
- C07C313/02—Sulfinic acids; Derivatives thereof
Definitions
- the present invention relates to alkoxycarbonylfluoroalkanesulfonates useful as photoacid generators and intermediates thereof, which are part of a chemically amplified resist material suitable for microfabrication techniques in manufacturing processes of semiconductor devices and the like, particularly photolithography. It relates to the manufacturing method.
- “Chemically amplified resist materials” are attracting attention as resists suitable for such exposure wavelengths.
- This reaction contains a radiation-sensitive acid generator (hereinafter referred to as “photoacid generator”) that generates an acid upon irradiation with radiation (hereinafter referred to as “exposure”), and the generated acid is used as a catalyst.
- photoacid generator a radiation-sensitive acid generator
- exposure an acid upon irradiation with radiation
- PFOS perfluorooctanesulfonic acid
- Derivatives are problematic in terms of stability (non-degradable) derived from C—F bonds, hydrophobicity, and bioaccumulative properties and accumulation properties derived from lipophilicity.
- perfluoroalkanesulfonic acids having 5 or more carbon atoms or derivatives thereof are beginning to raise the above problem.
- Patent Document 1 triphenylsulfonium methoxycarbonyldifluoromethanesulfonate
- Patent Document 2 (4-methylphenyl) diphenylsulfonyl t-butoxycarbonyldifluoromethanesulfonate
- Patent Document 3 triphenylsulfonium (adamantan-1-ylmethyl) oxy
- Alkoxycarbonylfluoromethanesulfonic acid onium salts such as carbonyldifluoromethanesulfonate
- reaction route represented by the following reaction formula [1] has been conventionally known. That is, starting with the synthesis of 3,3,4,4-tetrafluoro- [1,2] oxathiethane 2,2-dioxide [iii] using tetrafluoroethylene [i] and sulfur trioxide [ii], alcohol (ROH) Synthesis of acid fluoride [v] by ring-opening reaction of dioxide [iii] using benzene, or synthesis of acid fluoride [iv] by ring-opening isomerization of dioxide [iii] and acid fluoride using alcohol (ROH) Synthesis of acid fluoride [v] by esterification of fluoride [iv], then converting acid fluoride [v] to sulfonate (sodium sulfonate salt) [vi
- Patent Document 5 Also disclosed is a method in which the acid fluoride [v] in the reaction formula [1] is hydrolyzed with amine water and converted to ammonium sulfonates.
- the present applicant discloses a method for producing alkoxycarbonyldifluoromethanesulfonic acid onium salts represented by the following reaction formula [2]. That is, a halodifluoroacetic acid halide such as bromodifluoroacetic acid chloride [I], or a compound such as halodifluoroacetic acid salt or halodifluoroacetic anhydride is esterified, and halodifluoroacetic acid such as bromodifluoroacetic acid ester [II].
- a halodifluoroacetic acid halide such as bromodifluoroacetic acid chloride [I]
- a compound such as halodifluoroacetic acid salt or halodifluoroacetic anhydride
- halodifluoroacetic acid such as bromodifluoroacetic acid ester [II].
- Patent Document 1 and Patent Document 4 The production methods described in Patent Document 1 and Patent Document 4 include 3,3,4,4-tetrafluoro- [1,2] oxathiethane 2, synthesized from tetrafluoroethylene [i] and sulfur trioxide [ii]. 2-dioxide [iii] is used as a raw material. Since this synthesis uses explosive reagents, it is necessary to give sufficient consideration to safety, and since it is an industrially difficult reaction, 3,3,4,4-tetrafluoro obtained inevitably -[1,2] oxathiethane 2,2-dioxide [iii] is very expensive and is expected to be adopted industrially.
- Patent Document 6 and Patent Document 7 disclosed by the present applicant do not produce hydrogen fluoride or fluoride salt as a by-product, and therefore limit the material of the reactor used.
- This is a method capable of easily producing high-purity alkoxycarbonylfluoroalkanesulfonic acid salts without being subjected to this.
- alkoxycarbonyldifluoromethanesulfonic acid sodium salt is mainly used as a raw material for onium salt exchange as the final step.
- This alkoxycarbonyldifluoromethanesulfonic acid sodium salt is converted to the desired alkoxycarbonyldifluoroalkanesulfonic acid onium salts in onium salt exchange, but at the same time, an equivalent amount of (mainly) sodium halide is by-produced.
- the mixing of metals such as sodium is severely limited, and the allowable value is generally several hundred ppb or less (sometimes several tens ppb or less).
- an object of the present invention is to provide a method for producing alkoxycarbonylfluoroalkanesulfonic acid ammonium salts or alkoxycarbonylfluoroalkanesulfonic acid onium salts suitable for industrial production, and a novel intermediate product useful in the production method. It is what.
- alkoxycarbonylfluoroalkanesulfonates having the following characteristics.
- -Hydrogen fluoride or fluoride salt is not produced as a by-product, and therefore the material of the reactor to be used is not limited.
- -The operation of removing a metal such as sodium is simple, and a high-purity alkoxycarbonylfluoroalkanesulfonate can be produced.
- [Invention 1] A process for producing an alkoxycarbonylfluoroalkanesulfonic acid ammonium salt represented by the following general formula [1], comprising the following two steps.
- a step of obtaining alkanesulfinic acid ammonium salts Second step: a step of reacting an alkoxycarbonylfluoroalkanesulfinic acid ammonium salt represented by the general formula [3] with an oxidizing agent to obtain an alkoxycarbonylfluoroalkanesulfonic acid ammonium salt represented by the general formula [1].
- R has a linear or branched alkyl group having 1 to 10 carbon atoms and has a polymerizable double bond at least at the terminal portion of the linear or branched structure having 1 to 10 carbon atoms.
- a lactone or an aryl group having 6 to 20 carbon atoms (wherein the alkyl group, alkenyl group, alicyclic organic group, organic group composed of an alicyclic organic group and a linear alkylene group, monocyclic)
- Some or all of the hydrogen atoms on the formula or polycyclic lactone and aryl group are substituted with fluorine, hydroxyl group, hydroxycarbonyl group, linear, branched or cyclic alkoxy group having 1 to 6 carbon atoms.
- alkyl group Two hydrogen atoms on the same carbon constituting an organic group composed of a rukenyl group, an alicyclic organic group or an alicyclic organic group and a linear alkylene group are substituted with one oxygen atom to form a keto group.
- R 1 and R 2 are Each independently represents a fluorine atom or a linear, branched or cyclic perfluoroalkyl group having 1 to 6 carbon atoms, A + represents an ammonium ion, and in the general formula [2], X represents a chlorine atom or a bromine atom.
- R, R 1 and R 2 have the same meaning as in general formula [1]
- R, R 1 , R 2 and A + have the same meaning as in general formula [1]. is there.
- [Invention 2] A process for producing onium salts of alkoxycarbonylfluoroalkanesulfonic acid represented by the following general formula [4], comprising the following three steps.
- a step of obtaining alkanesulfinic acid ammonium salts Second step: a step of reacting an alkoxycarbonylfluoroalkanesulfinic acid ammonium salt represented by the general formula [3] with an oxidizing agent to obtain an alkoxycarbonylfluoroalkanesulfonic acid ammonium salt represented by the general formula [1].
- R, R 1 and R 2 have the same meaning as in the general formula [1]
- Q + is a sulfonium cation represented by the following general formula (a) or the following general formula (b), or It represents an iodonium cation represented by the following general formula (c), wherein X ′ ⁇ represents a monovalent anion in general formula [5].
- R 3 , R 4 and R 5 are each independently a substituted or unsubstituted linear or branched alkyl group having 1 to 10 carbon atoms, an alkenyl group or an oxoalkyl group, or Represents a substituted or unsubstituted aryl group, aralkyl group or aryloxoalkyl group having 6 to 18 carbon atoms, or any two or more of R 1 , R 2 and R 3 are bonded to each other; A ring may be formed together with the sulfur atom of (In the general formula (b), R 6 represents a substituted or unsubstituted linear, branched or cyclic alkyl or alkenyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl having 6 to 14 carbon atoms.
- R 6 represents a substituted or unsubstituted linear, branched or cyclic alkyl or alkenyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl having 6 to 14 carbon atoms.
- q represents an integer of 0 to 5, and n represents 0 or 1.
- Invention 3 The method according to either Invention 1 or Invention 2, wherein A + is an ammonium ion represented by the following general formula [6].
- G 1 , G 2 , G 3 and G 4 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxyalkyl group having 1 to 6 carbon atoms, or 3 to 3 carbon atoms.
- [Invention 5] A crude product of 2- (alkylcarbonyloxy) -1,1-difluoroethanesulfinic acid ammonium salt obtained after the sulfination reaction in the first step is extracted with an organic solvent, and a layer comprising the organic solvent is extracted.
- [Invention 8] A salt represented by the general formula [7]. (In general formula [7], R, R 1 and R 2 have the same meaning as in general formula [1], and G 1 , G 2 , G 3 and G 4 have the same meaning as in general formula [6].)
- the reaction of the present invention is characterized in that all necessary raw materials are inexpensive, the reaction operation is simple, and the reactor used is not limited.
- the purification of this reaction has a feature that the target product can be obtained with high purity.
- the halofluoroalkanoic acid ester represented by the general formula [2] is reacted with a sulfinating agent in the presence of an amine or an ammonium salt (first step). : Sulfination step) After obtaining an alkoxycarbonylfluoroalkanesulfinic acid ammonium salt represented by the general formula [3], it is reacted with an oxidizing agent (second step: oxidation step) represented by the general formula [1]
- the reaction for obtaining alkoxycarbonylmethanesulfonic acid ammonium salt is the main point. Then, it is made to react with onium salts continuously (3rd process: salt exchange process), and the alkoxycarbonylmethanesulfonic acid onium salt represented by General formula [4] can also be obtained.
- X represents a chlorine atom, a bromine atom or an iodine atom
- a + represents an ammonium ion
- R 1 and R 2 each independently represents a fluorine atom or a linear, branched or cyclic perfluoroalkyl group having 1 to 6 carbon atoms.
- R represents a linear or branched alkyl group having 1 to 10 carbon atoms, a linear or branched alkyl group having 1 to 10 carbon atoms, an alkenyl group having a polymerizable double bond at least at the terminal portion, and 3 to 20 carbon atoms.
- An alicyclic organic group an organic group composed of an alicyclic organic group having 3 to 20 carbon atoms and a linear alkylene group, a monocyclic or polycyclic lactone having 3 to 30 carbon atoms, or 6 to 6 carbon atoms
- Some or all of the hydrogen atoms on the group may be substituted with fluorine, hydroxyl group, hydroxycarbonyl group, linear, branched or cyclic alkoxy group having 1 to 6 carbon atoms.
- halofluoroalkanoic acid skeleton (partial structure excluding the ester portion (R)) include chlorodifluoroacetic acid ester, bromodifluoroacetic acid ester, iododifluoroacetic acid ester, 2-chloro-2,3,3, 3-tetrafluoropropanoic acid ester, 2-bromo-2,3,3,3-tetrafluoropropanoic acid ester, 2-iodo-2,3,3,3-tetrafluoropropanoic acid ester, 2-chloro-2- (Trifluoromethyl) -3,3,3-trifluoropropanoate, 2-bromo-2- (trifluoromethyl) -3,3,3-trifluoropropanoate, 2-iodo-2- (tri Examples thereof include fluoromethyl) -3,3,3-trifluoropropanoic acid ester.
- chlorodifluoroacetic acid ester bromodifluoroacetic acid ester, 2-chloro-2,3,3,3-tetrafluoropropanoic acid ester, 2-bromo-2 are preferable in terms of easy availability and low price.
- 3,3,3-tetrafluoropropanoic acid ester is preferable, and from the viewpoint of reactivity, bromodifluoroacetic acid ester and 2-bromo-2,3,3,3-tetrafluoropropanoic acid ester are particularly preferable.
- Examples of the linear or branched alkyl group having 1 to 10 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, a t-butyl group, and an n-pentyl group. N-hexyl group, n-heptyl group, n-octyl group, n-nonyl group, n-decyl group and the like.
- Examples of the straight-chain or branched alkenyl group having a polymerizable double bond at 1 to 10 carbon atoms include a vinyl group, a 1-methylethenyl group, an allyl group, a 3-butenyl group, and 1-methylallyl. Group, 2-methylallyl group, 4-pentenyl group, 5-hexenyl group and the like.
- Examples of the alicyclic organic group having 3 to 20 carbon atoms include a cyclopentyl group, a cyclohexyl group, an adamantyl group, a norbornyl group, a camphoroyl group, a cyclopentylmethyl group, a cyclopentylethyl group, a cyclohexylmethyl group, a cyclohexylethyl group, and an adamantylmethyl group.
- adamantylethyl group, norbornylmethyl group, norbornylethyl group, camphoroylmethyl group, camphoroylethyl group and the like are examples of the alicyclic organic group having 3 to 20 carbon atoms.
- An organic group composed of an alicyclic organic group having 3 to 20 carbon atoms and a linear alkylene group is “an organic group in which one valence of an alicyclic organic group and a linear alkylene group is bonded”.
- a cyclopropylmethyl group, a cyclobutylmethyl group, a cyclopentylmethyl group, a cyclohexylmethyl group, a bornylmethyl group, a norbornylmethyl group, an adamantylmethyl group and the like can be mentioned.
- Monocyclic or polycyclic lactones having 3 to 30 carbon atoms include ⁇ -butyrolaclone, ⁇ -valerolactone, angelica lactone, ⁇ -hexalactone, ⁇ -heptalactone, ⁇ -octalactone, ⁇ -nonalactone, 3-methyl -4-octanolide (whiskey lactone), ⁇ -decalactone, ⁇ -undecalactone, ⁇ -dodecalactone, ⁇ -jasmolactone (7-decenolactone), ⁇ -hexalactone, 4, 6, 6 (4, 4, 6) -Trimethyltetrahydropyran-2-one, ⁇ -octalactone, ⁇ -nonalactone, ⁇ -decalactone, ⁇ -2-decenolactone, ⁇ -undecalactone, ⁇ -dodecalactone, ⁇ -tridecalactone, ⁇ -tetra Decalactone, lactoskatone,
- aryl group having 6 to 20 carbon atoms examples include phenyl group, o-tolyl group, m-tolyl group, p-tolyl group, p-hydroxyphenyl group, 1-naphthyl group, 1-anthracenyl group, benzyl group and the like. Can be mentioned.
- two hydrogen atoms on the same carbon constituting the alkyl group, alkenyl group, alicyclic organic group, or organic group composed of an alicyclic organic group and a linear alkylene group are substituted with one oxygen atom. It may be a keto group.
- one of the hydrogen atoms on the alkyl group may be substituted with a 2-acryloyloxy group or a 2-methacryloyloxy group.
- Examples of the sulfinating agent that can be used in this step include those represented by the general formula [8].
- S 1 represents S 2 O 4 , HOCH 2 SO 2 , SO 4 or HSO 4
- m and n represent an integer
- p represents 0 (zero) or an integer
- M 1 represents Li, Na, K or NH 4 .
- the sulfinating agent include lithium dithionite, sodium dithionite, potassium dithionite, ammonium dithionite, lithium hydroxymethanesulfinate, sodium hydroxymethanesulfinate, potassium hydroxymethanesulfinate, hydroxymethanesulfine.
- Ammonium acid, lithium sulfite, sodium sulfite, potassium sulfite, ammonium sulfite, lithium hydrogen sulfite, sodium hydrogen sulfite, potassium hydrogen sulfite, ammonium hydrogen sulfite and the like can be mentioned.
- sodium dithionite and potassium dithionite are preferred, and sodium dithionite is particularly preferred.
- the molar ratio of the sulfinating agent to the halofluoroalkanoic acid ester [2] is usually 0.5 to 10, preferably 0.9 to 5.0, particularly preferably 1.0 to 2.0. .
- the sulfination reaction using a sulfinating agent may proceed without the addition of a base, but the reaction can be promoted by the addition, so it is usually added.
- a base to be added an inorganic base such as sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate or the like is generally used.
- a major feature is that the sulfination reaction is performed using an amine or an ammonium salt as a base.
- G 1 , G 2 , G 3 and G 4 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxyalkyl group having 1 to 6 carbon atoms, or 3 to 12 carbon atoms.
- a cycloalkyl group, an optionally substituted phenyl group, an optionally substituted aralkyl group having 7 to 12 carbon atoms, an optionally substituted naphthyl group, an optionally substituted cycloalkyl group having 5 to 10 carbon atoms It represents a heteroaromatic group or a ring which may contain a hetero atom in at least two of G 1 , G 2 , G 3 and G 4 .
- amines include ammonia, methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, n-propylamine, di-n-propylamine, tri-n-propylamine, i-propylamine, di-i.
- -Propylamine tri-i-propylamine, n-butylamine, di-n-butylamine, tri-n-butylamine, sec-butylamine, di-sec-butylamine, tri-sec-butylamine, tert-butylamine, di-tert -Butylamine, tri-tert-butylamine, diisopropylethylamine, phenylamine, diphenylamine, triphenylamine, benzylamine, benzylmethylamine, benzyldimethylamine, benzylethylamine, benzi Diethylamine, 2-methylbenzylamine, 3-methylbenzylamine, can organic bases exemplified with 4-methylbenzylamine or the following structure.
- trimethylamine, triethylamine, tri-n-propylamine, tri-i-propylamine, tri-n-butylamine, tri-sec-butylamine, tri-tert-butylamine, diisopropylethylamine, triphenylamine, tert Preferred organic bases are butylamine, benzylamine, benzylmethylamine, benzyldimethylamine, benzylethylamine, benzyldiethylamine, 2-methylbenzylamine, 3-methylbenzylamine, 4-methylbenzylamine and organic bases having the structure It can be illustrated.
- trimethylamine, triethylamine, diisopropylethylamine, tert-butylamine, and benzylamine are not only easily available, but also significantly improve the reactivity of the sulfination reaction, and the resulting ammonium alkoxycarbonylfluoroalkanesulfinate It is preferable because the fat solubility of the salt is sufficiently improved.
- the molar ratio of amine to halofluoroalkanoic acid ester [2] is usually 1.0 to 10.0, preferably 1.1 to 2.0.
- 2-alkylcarbonyloxy-1,1-difluoroethanesulfinic acid metal salt is added as a by-product due to cations derived from the sulfinating agent (metal cations such as sodium ion, potassium ion and lithium ion). I will be born. In this case, not only is it difficult to separate the ammonium salt and the metal salt in the subsequent step, but the yield of the target product is also lowered, which is not preferable. Moreover, although there is no problem if the molar ratio exceeds 10.0, it is not preferable because it is economically disadvantageous.
- an ammonium salt represented by the general formula [9] is preferable.
- G 1 , G 2 , G 3 and G 4 have the same meaning as in the general formula [6]
- Z ⁇ represents a monovalent anion.
- ammonium ion G 1 G 2 G 3 G 4 N + of the general formula [9] include the following structures.
- ammonium ions are preferred.
- ammonium ions are particularly preferable.
- Examples of the monovalent anion of Z ⁇ in the general formula [9] include F ⁇ , Cl ⁇ , Br ⁇ , I ⁇ , OH ⁇ , ClO 4 ⁇ , HSO 4 ⁇ , H 2 PO 4 ⁇ , and BF 4 ⁇ .
- the molar ratio of the ammonium salt to the halofluoroalkanoic acid ester [2] is usually 1.0 to 10.0, preferably 1.1 to 2.0.
- 2-alkylcarbonyloxy-1,1-difluoroethanesulfinic acid metal salt is added as a by-product due to cations derived from the sulfinating agent (metal cations such as sodium ion, potassium ion and lithium ion). I will be born.
- metal cations such as sodium ion, potassium ion and lithium ion
- ammonium ion represented by the general formula [6] can be suitably introduced as A + by carrying out the sulfination reaction using the above amine or ammonium salt.
- the alkoxycarbonylfluoroalkanesulfinic acid ammonium salts [3] include the structure of the following general formula [7].
- the sulfination reaction is preferably performed in a mixed solvent of an organic solvent and water.
- the organic solvent is preferably a solvent having good compatibility with water, such as lower alcohols, tetrahydrofuran, N, N-dimethylformamide, N, N-dimethylacetamide, acetonitrile, dimethyl sulfoxide, and more preferably methanol.
- the proportion of the organic solvent used is usually 5 parts by weight or more, preferably 10 parts by weight or more, and more preferably 20 to 90 parts by weight with respect to 100 parts by weight of the total of the organic solvent and water.
- the reaction temperature is usually 0 to 200 ° C., preferably 20 to 40 ° C.
- the reaction time is usually from 0.1 to 12 hours, preferably from 0.5 to 4 hours.
- the end point of the reaction is preferably the time when a certain carboxylic acid bromodifluoroethyl ester [1] is consumed.
- a pressure vessel such as an autoclave is used.
- an inorganic base such as sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate or the like is used.
- a higher reaction temperature is required, and the reaction time is several times to several tens of times. Specifically, it takes about 8 to 40 hours at 50 to 80 degrees.
- the reaction solution is appropriately post-treated.
- the amine or ammonium salt is used, so that the resulting alkoxycarbonylfluoroalkanesulfinic acid ammonium salts [3] have improved fat solubility.
- the reaction solution water can be separated into a uniform liquid composed of water and an organic solvent highly compatible with water, or separated into two layers, but the organic layer in which water is dissolved and the water in which the organic solvent is dissolved
- a solvent examples include halogen solvents such as chloroform and dichloromethane, ether solvents such as diethyl ether, diisopropyl ether and tert-butyl methyl ether, and acetate solvents such as ethyl acetate and butyl acetate.
- halogen solvents such as chloroform and dichloromethane
- ether solvents such as diethyl ether, diisopropyl ether and tert-butyl methyl ether
- acetate solvents such as ethyl acetate and butyl acetate.
- bromine is eliminated from the raw material halofluoroalkanoic acid ester [2], so that there is a bromine mark equivalent to the raw material in the reaction solution.
- the bromine mark is also oxidized, and a chemical species having bromination ability (probably bromine) is generated, and alkoxycarbonylfluoroalkanesulfinic acid ammonium salts [3] Is brominated to produce a raw material halofluoroalkanoic acid ester [2].
- the molar ratio of sodium thiosulfate or sodium sulfite used to halofluoroalkanoic acid esters [2] is usually 0.1 to 10.0, preferably 1.0 to 5.0.
- the concentration of the sodium thiosulfate aqueous solution or sodium sulfite aqueous solution used is usually from 3% by weight to the saturated state, but preferably 5 to 25% by weight.
- an alkoxycarbonylfluoroalkanesulfinic acid metal salt obtained by using an inorganic base is less lipophilic than an ammonium salt, but rather highly water-soluble. Therefore, extraction with an organic solvent becomes difficult, and even if extraction is possible, it is difficult to obtain the target metal sulfinate with a high yield because of its water solubility, so that it is often distributed to the aqueous layer. Therefore, in order to obtain a sulfinic acid metal salt with good yield, it is necessary to concentrate all of the reaction solution.
- the metal content such as sodium in the reaction solution is hardly reduced, and almost all of the metal content used in the reaction is brought into the next process, and the load of the purification process after the next process is increased. Remarkably larger. Furthermore, water concentration is generally more difficult than organic solvent concentration.
- inorganic impurities such as metals such as sodium are removed. Making it easier is another effect of using an organic base in the present invention.
- the organic layer is washed with water and an aqueous solution of sodium thiosulfate (or an aqueous solution of sodium sulfite), and the solvent is distilled off from the organic layer to obtain the target ammonium sulfinate salt.
- an organic solvent for example, extraction with an organic solvent is performed, the organic layer is washed with water and an aqueous solution of sodium thiosulfate (or an aqueous solution of sodium sulfite), and the solvent is distilled off from the organic layer to obtain the target ammonium sulfinate salt.
- oxidants that can be used in this step include metachloroperbenzoic acid, t-butyl hydroperoxide, potassium peroxysulfate, potassium permanganate, sodium perborate, sodium metaiodate, chromic acid, Examples include sodium chromate, halogen, iodobenzene dichloride, iodobenzene diacetate, osmium oxide (VIII), ruthenium oxide (VIII), sodium hypochlorite, sodium chlorite, oxygen gas, ozone gas, etc. Hydrogen peroxide, metachloroperbenzoic acid, t-butyl hydroperoxide and the like.
- the molar ratio of the oxidizing agent to alkoxycarbonylfluoroalkanesulfinic acid ammonium salt [3] is usually 0.9 to 10.0, preferably 1.0 to 2.0.
- an oxidizing agent is added to the molar amount of the halofluoroalkanoic acid ester represented by the general formula [2] before sulfination. Add it.
- a transition metal catalyst can be used in combination with an oxidizing agent.
- the transition metal catalyst include disodium tungstate, iron (III) chloride, ruthenium (III) chloride, selenium (IV) oxide, and the like, preferably disodium tungstate.
- the molar ratio of the transition metal catalyst to the alkoxycarbonylfluoroalkanesulfinic acid ammonium salt [3] is usually 0.0001 to 1.0, preferably 0.001 to 0.5, more preferably 0.001 to 0.1. It is.
- a buffering agent may be used for the purpose of adjusting the pH of the reaction solution.
- buffer examples include disodium hydrogen phosphate, sodium dihydrogen phosphate, dipotassium hydrogen phosphate, and potassium dihydrogen phosphate.
- the molar ratio of the buffering agent to the alkoxycarbonylfluoroalkanesulfinic acid ammonium salt [3] is usually 0.01 to 2.0, preferably 0.03 to 1.0, more preferably 0.05 to 0.5. is there.
- This oxidation reaction is usually performed in a reaction solvent.
- the reaction solvent is preferably water or an organic solvent such as lower alcohols, tetrahydrofuran, N, N-dimethylformamide, N, N-dimethylacetamide, acetonitrile, dimethyl sulfoxide, acetic acid, trifluoroacetic acid, chloroform, or dichloromethane. More preferred are water, methanol, N, N-dimethylacetamide, acetonitrile, dimethyl sulfoxide, chloroform, dichloromethane and the like, and particularly preferred are water, methanol, chloroform and dichloromethane.
- an organic solvent such as lower alcohols, tetrahydrofuran, N, N-dimethylformamide, N, N-dimethylacetamide, acetonitrile, dimethyl sulfoxide, acetic acid, trifluoroacetic acid, chloroform, or dichloromethane. More preferred are water, methanol, N, N-dimethylacetamide,
- an organic solvent and water can be used in combination, and the use ratio of the organic solvent in that case is usually 5 parts by weight or more, preferably 100 parts by weight in total of the organic solvent and water. Is 10 parts by weight or more, more preferably 20 to 90 parts by weight.
- the amount of the reaction solvent used is usually 1 to 100 parts by weight, preferably 2 to 100 parts by weight, more preferably 5 to 50 parts by weight, based on 1 part by weight of the alkoxycarbonylfluoroalkanesulfinic acid ammonium salt [3].
- the reaction temperature is usually 0 to 100 ° C., preferably 5 to 60 ° C., more preferably 5 to 40 ° C., and the reaction time is usually 0.1 to 72 hours, preferably 0.5 to 24 hours. Yes, more preferably 0.5 to 12 hours, but using an analytical instrument such as thin layer chromatography (TLC) or nuclear magnetic resonance apparatus (NMR), the starting material is an alkoxycarbonylfluoroalkanesulfinic acid ammonium salt [ 3] is preferably taken as the end point of the reaction.
- TLC thin layer chromatography
- NMR nuclear magnetic resonance apparatus
- the reaction solution is appropriately post-treated.
- the amine or ammonium salt is used in the above-mentioned first step, the lipid solubility of the obtained alkoxycarbonylfluoroalkanesulfonic acid ammonium salt [1] is improved. As a result, it becomes possible to extract the target ammonium sulfonate salt from a reaction solution (generally water or methanol as a main component) using an organic solvent having low or no water solubility. .
- a solvent examples include halogen solvents such as chloroform and dichloromethane, ether solvents such as diethyl ether, diisopropyl ether and tert-butyl methyl ether, and acetate solvents such as ethyl acetate and butyl acetate.
- halogen solvents such as chloroform and dichloromethane
- ether solvents such as diethyl ether, diisopropyl ether and tert-butyl methyl ether
- acetate solvents such as ethyl acetate and butyl acetate.
- the proportion of water used in this case is usually 1 to 100 parts by weight, preferably 2 to 100 parts by weight, more preferably 5 to 50 parts by weight, based on 1 part by weight of the alkoxycarbonylfluoroalkanesulfinic acid ammonium salt [3]. Part.
- metal analysis methods such as ion chromatogram method or ICP mass spectrometry, measure the content of metals including sodium, and compare with the preset standard value of metal content, It is a particularly preferable aftertreatment method to perform washing with water again when the standard value is deviated.
- the onium cation Q + contained in the general formula [5] represents a sulfonium cation represented by the following general formula (a) or the following general formula (b), or an iodonium cation represented by the following general formula (c), X ′ ⁇ represents a monovalent anion.
- R 1 , R 2 and R 3 are each independently substituted or unsubstituted linear or branched alkyl group, alkenyl group or oxoalkyl group having 1 to 10 carbon atoms, or substituted Or an unsubstituted aryl group having 6 to 18 carbon atoms, an aralkyl group or an aryloxoalkyl group, or any two or more of R 1 , R 2 and R 3 are bonded to each other in the formula You may form a ring with a sulfur atom.
- R 4 represents a substituted or unsubstituted linear, branched or cyclic alkyl group or alkenyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 14 carbon atoms.
- m represents an integer of 1 to 5, and n represents 0 (zero) or 1.
- R 4 represents a substituted or unsubstituted linear, branched or cyclic alkyl group or alkenyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 14 carbon atoms.
- q represents an integer of 0 (zero) to 5, and n represents 0 (zero) or 1.
- R 1 , R 2 and R 3 in the general formula (a) of the sulfonium cation represented by the general formula (a) include the following.
- alkyl group methyl group, ethyl group, n-propyl group, isopropyl group, cyclopropyl group, n-butyl group, sec-butyl group, isobutyl group, tert-butyl group, n-pentyl group, cyclopentyl group, n- Hexyl group, n-heptyl group, 2-ethylhexyl group, cyclohexyl group, cycloheptyl group, 4-methylcyclohexyl group, cyclohexylmethyl group, n-octyl group, n-decyl group, 1-adamantyl group, 2-adamantyl group, Bicyclo [2.2.1] hepten-2-yl group, 1-adamantan
- alkenyl group examples include a vinyl group, an allyl group, a propenyl group, a butenyl group, a hexenyl group, and a cyclohexenyl group.
- alkenyl group examples include a vinyl group, an allyl group, a propenyl group, a butenyl group, a hexenyl group, and a cyclohexenyl group.
- oxoalkyl group examples include 2-oxocyclopentyl group, 2-oxocyclohexyl group, 2-oxopropyl group, 2-oxoethyl group, 2-cyclopentyl-2-oxoethyl group, 2-cyclohexyl-2-oxoethyl group, 2- ( And 4-methylcyclohexyl) -2-oxoethyl group.
- Aryl groups include phenyl, naphthyl, thienyl, etc., p-methoxyphenyl, m-methoxyphenyl, o-methoxyphenyl, p-ethoxyphenyl, p-tert-butoxyphenyl, m-tert.
- An alkoxyphenyl group such as a butoxyphenyl group, an alkylphenyl group such as a 2-methylphenyl group, a 3-methylphenyl group, a 4-methylphenyl group and an ethylphenyl group, an alkylnaphthyl group such as a methylnaphthyl group and an ethylnaphthyl group, Examples thereof include a dialkylnaphthyl group such as a diethylnaphthyl group, a dialkoxynaphthyl group such as a dimethoxynaphthyl group and a diethoxynaphthyl group.
- Examples of the aralkyl group include benzyl group, 1-phenylethyl group, 2-phenylethyl group and the like.
- Examples of the aryloxoalkyl group 2-aryl-2-oxoethyl group such as 2-phenyl-2-oxoethyl group, 2- (1-naphthyl) -2-oxoethyl group, 2- (2-naphthyl) -2-oxoethyl group, etc. Groups and the like.
- R 1 , R 2 and R 3 are bonded to each other to form a cyclic structure via a sulfur atom, 1,4-butylene, 3-oxa-1, 5-pentylene and the like can be mentioned.
- substituents include aryl groups having a polymerizable substituent such as acryloyloxy group and methacryloyloxy group.
- 4- (acryloyloxy) phenyl group, 4- (methacryloyloxy) phenyl group, 4 -Vinyloxyphenyl group, 4-vinylphenyl group and the like can be mentioned.
- sulfonium cation represented by the general formula (a) include triphenylsulfonium, (4-tert-butylphenyl) diphenylsulfonium, bis (4-tert-butylphenyl) phenylsulfonium, tris (4-tert- Butylphenyl) sulfonium, (3-tert-butylphenyl) diphenylsulfonium, bis (3-tert-butylphenyl) phenylsulfonium, tris (3-tert-butylphenyl) sulfonium, (3,4-ditert-butylphenyl) Diphenylsulfonium, bis (3,4-ditert-butylphenyl) phenylsulfonium, tris (3,4-ditert-butylphenyl) sulfonium, (4-tert-butoxyphenyl) diphenyls
- triphenylsulfonium (4-tert-butylphenyl) diphenylsulfonium, (4-tert-butoxyphenyl) diphenylsulfonium, tris (4-tert-butylphenyl) sulfonium, (4-tert-butoxycarbonylmethyloxyphenyl) ) Diphenylsulfonium and the like.
- the substituent position of the R 4 — (O) n — group in the sulfonium cation general formula (b) represented by the general formula (b) is not particularly limited, but the 4-position or 3-position of the phenyl group is preferable. . More preferably, it is the 4th position.
- n is 0 or 1.
- sulfonium cation represented by the general formula (b) include (4-methylphenyl) diphenylsulfonium, (4-ethylphenyl) diphenylsulfonium, (4-cyclohexylphenyl) diphenylsulfonium, (4-n-hexyl).
- the substituent position of the R 4 — (O) n — group in the iodonium cation general formula (c) represented by the general formula (c) is not particularly limited, but the 4-position or 3-position of the phenyl group is preferable. . More preferably, it is the 4th position.
- n is 0 or 1.
- Specific examples of R 4 can be mentioned again the same as R 4 in formula (b).
- iodonium cation represented by the general formula (c) include diphenyliodonium, bis (4-methylphenyl) iodonium, bis (4-ethylphenyl) iodonium, bis (4-tert-butylphenyl) iodonium, bis (4- (1,1-dimethylpropyl) phenyl) iodonium, (4-methoxyphenyl) phenyliodonium, (4-tert-butoxyphenyl) phenyliodonium, 4- (acryloyloxy) phenylphenyliodonium, 4- (methacryloyloxy) ) Phenylphenyliodonium and the like, among which bis (4-tert-butylphenyl) iodonium is preferably used.
- Examples of the monovalent anion of X ′ ⁇ in the general formula [5] include F ⁇ , Cl ⁇ , Br ⁇ , I ⁇ , ClO 4 ⁇ , HSO 4 ⁇ , H 2 PO 4 ⁇ , BF 4 ⁇ and PF.
- the molar ratio of the monovalent onium salt represented by the general formula [4] to the 2-alkylcarbonyloxy-1,1-difluoroethanesulfonic acid ammonium salt [3] is usually 0.5 to 10.0, preferably Is 0.8 to 2.0, more preferably 0.9 to 1.2.
- This onium salt exchange reaction is usually performed in a reaction solvent.
- the reaction solvent is preferably water or an organic solvent such as lower alcohols, tetrahydrofuran, N, N-dimethylformamide, N, N-dimethylacetamide, acetonitrile, dimethyl sulfoxide, and more preferably water, methanol, N , N-dimethylacetamide, acetonitrile, dimethyl sulfoxide, etc., particularly preferably water.
- an organic solvent such as lower alcohols, tetrahydrofuran, N, N-dimethylformamide, N, N-dimethylacetamide, acetonitrile, dimethyl sulfoxide, and more preferably water, methanol, N , N-dimethylacetamide, acetonitrile, dimethyl sulfoxide, etc., particularly preferably water.
- water and an organic solvent can be used in combination.
- the use ratio of the organic solvent in this case is usually 5 parts by weight or more, preferably 100 parts by weight of water and the organic solvent in total. Is 10 parts by weight or more, more preferably 20 to 90 parts by weight.
- the amount of the reaction solvent used is usually 1 to 100, preferably 2 to 100 parts by weight, and more preferably 5 to 50 parts by weight with respect to 1 part by weight of the counter-ion exchange precursor.
- the reaction temperature is usually from 0 to 80 ° C., preferably from 5 to 30 ° C.
- the reaction time is usually from 10 minutes to 16 hours, preferably from 30 minutes to 6 hours, but thin layer chromatography (TLC) Or using an analytical instrument such as a nuclear magnetic resonance apparatus (NMR), and when the 2-alkylcarbonyloxy-1,1-difluoroethanesulfonic acid ammonium salt [3], which is a raw material, is consumed, may be the end point of the reaction preferable.
- TLC thin layer chromatography
- NMR nuclear magnetic resonance apparatus
- the 2-alkylcarbonyloxy-1,1-difluoroethanesulfonic acid onium salt represented by the general formula [4] thus obtained is washed with an organic solvent or extracted and purified as necessary. You can also.
- the organic solvent is preferably an organic solvent that is not miscible with water, such as esters such as ethyl acetate and n-butyl acetate; ethers such as diethyl ether; alkyl halides such as methylene chloride and chloroform.
- the alkoxycarbonylfluoroalkanesulfonic acid ammonium salt does not contain a metal in itself, and as described above, the alkoxycarbonylfluoroalkanesulfonic acid ammonium salt and the alkoxycarbonylfluoroalkane obtained in the first step are used. Since alkanesulfinic acid ammonium salts can be extracted with an organic solvent and washed with water, inorganic impurities such as sodium and other metals can be greatly reduced.
- Example 1-a Production of adamantan-1-ylmethyl bromodifluoroacetate (previous process: esterification process) A 50 L reactor was charged with 476 g (3.18 mol, 1.11 equivalents) of 1-adamantane methanol and 5.5 kg of diethyl ether, suspended by stirring, and 615 g (2.86 mol) of bromodifluoroacetic chloride in it. , 1.0 equivalent). The suspension was cooled to 0 ° C., and then 578 g (5.72 mol, 2.0 equivalents) of triethylamine was slowly added dropwise. The reaction solution was allowed to stand at room temperature while stirring, and further stirred at room temperature for 1 hour.
- first step: sulfination step: extraction solvent chloroform
- 200 g (618 mmol, 1.0 equivalent) of bromodifluoroacetate adamantan-1-ylmethyl obtained in Example 1-a was dissolved in 600 g of acetonitrile, 500 g of water, and sodium dithionite 129. 2 g (740 mmol, 1.2 eq) was added and stirred.
- the reaction solution was extracted twice with 250 g of chloroform, and the obtained organic layer was washed once with water, and the chloroform was distilled off to obtain 112 g of the target triethylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate. Got. At this time, the purity was 93% and the yield was 97%.
- Example 1-d Production of triphenylsulfonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate (third step: onium salt exchange step)
- 100 g of triethylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate (purity 93%, 219 mmol, 1.0 equivalent) obtained in Example 1-c was added to 300 g of chloroform. After dissolution, 250 g of water and 78.9 g (223 mmol, 1.05 equivalent) of triphenylsulfonium bubromide were added and stirred for 1 hour.
- the reaction solution was separated into an organic layer and an aqueous layer.
- the obtained organic layer was washed with water, and chloroform was distilled off.
- the obtained concentrated solution was dissolved in a mixed solvent of chloroform, ethyl acetate and diisopropyl ether, and recrystallized to obtain 119 g (yield 92%) of the desired triphenylsulfonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate. , Purity 99%).
- Fluorine ions were not detected in any wastewater obtained in this step. Further, 440 ppb of sodium ion (Na + ) was detected from triphenylsulfonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate obtained in this step.
- the obtained organic layer was washed once each with 10% aqueous sodium thiosulfate solution and water, and dichloromethane was distilled off to obtain 112 g of the target (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfinate triethylammonium. At this time, the purity was 89% and the yield was 79%.
- a trace amount (15 ppm) of fluorine ions (F ⁇ ) was detected from the aqueous layer side of the reaction solution in this step. From the triethylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfinate obtained in this step, 4500 ppb of sodium ion (Na + ) was detected.
- second step: oxidation step: extraction solvent dichloromethane
- the reaction solution was extracted twice with 250 g of dichloromethane (in place of chloroform), and the obtained organic layer was washed once with water and the dichloromethane was distilled off to obtain the target (adamantan-1-ylmethyl) oxycarbonyldifluoro. 109 g of triethylammonium methanesulfonate was obtained. At this time, the purity was 95% and the yield was 96%. Fluorine ions (F ⁇ ) were not detected in any wastewater obtained in this step. From the triethylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate obtained in this step, 1170 ppb of sodium ion (Na + ) was detected.
- Example 3 Production of triethylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate (second step: oxidation step: increased number of water washings) The reaction was carried out in the same manner as in Example 1-c. The reaction solution was extracted twice with 250 g of chloroform, and the resulting organic layer was washed 5 times with water (instead of “once” in Example 1-c). Then, 90.6 g of the target (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate triethylammonium salt was obtained by distilling off chloroform. At this time, the purity was 96% and the yield was 81%.
- Fluorine ions were not detected in any wastewater obtained in this step. From the triethylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate obtained in this step, 420 ppb of sodium ion (Na + ) was detected. Thus, in this example, a decrease in yield was observed compared to Example 1-c, but the sodium content was further significantly reduced.
- Example 4-a Production of tert-butylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfinate (first step: sulfination step: use of amine)
- first step sulfination step: use of amine
- 150 g (455 mmol, 1.0 equivalent) of bromodifluoroacetate adamantan-1-ylmethyl obtained in Example 1-a was dissolved in 450 g of acetonitrile, 400 g of water, and 95. sodium dithionite. 1 g (546 mmol, 1.2 eq) was added and stirred.
- Example 4-b Production of tert-butylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate (second step: oxidation step: recrystallization)
- second step oxidation step: recrystallization
- 165 g of tert-butylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfinate obtained in Example 4-a purity 84%, 364 mmol, 1.0 equivalent
- the organic layer thus obtained was washed with 200 g of a 10% aqueous sodium sulfite solution and 500 g of saturated sodium hydrogen carbonate, washed twice with 500 g of water, and then chloroform was distilled off.
- the obtained solid was dissolved in a mixed solvent of chloroform / ethyl acetate / diisopropyl ether and recrystallized to obtain 130 g of the target (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate t-butylammonium salt. At this time, the purity was 99% and the yield was 90%.
- Fluorine ions were not detected in any wastewater obtained in this step. From the t-butylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate obtained in this step, 360 ppb of sodium ion (Na + ) was detected. As described above, in this example, the yield was slightly decreased as compared with Example 1-b, but the sodium content was further significantly reduced.
- Example 4-c Production of triphenylsulfonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate (third step: onium salt exchange step)
- 130 g purity 99%, 324 mmol, 1.0 equivalent
- (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate obtained in Example 4-b was added to 500 g of chloroform. After dissolution, 400 g of water and 116.8 g (340 mmol, 1.05 equivalent) of triphenylsulfonium bubromide were added and stirred for 1 hour.
- Example 5-a Production of tert-butylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfinate (first step: sulfination step: coexistence with ammonium salt)
- first step sulfination step: coexistence with ammonium salt
- 150 g (455 mmol, 1.0 equivalent) of adamantan-1-ylmethyl bromodifluoroacetate obtained in Example 1-a was dissolved in 450 g of acetonitrile, 400 g of water, tert-butylammonium chloride 59 .9 g (546 mmol, 1.2 equivalents) and sodium dithionite 95.1 g (546 mmol, 1.2 equivalents) were added and stirred for 2 hours.
- the reaction solution was separated into an organic layer and an aqueous layer.
- acetonitrile was distilled off and 600 g of chloroform was added to form a chloroform solution.
- the obtained organic layer was washed once each with 10% aqueous sodium thiosulfate solution and water, and chloroform was distilled off to obtain 153 g of the target (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfinate tert-butylammonium salt. It was. At this time, the purity was 86% and the yield was 76%.
- a trace amount (28 ppm) of fluorine ions (F ⁇ ) was detected from the aqueous layer side of the reaction solution in this step.
- 4930 ppb of sodium ion (Na + ) was detected from tert-butylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfinate obtained in this step. It was confirmed that the sulfination step can be carried out even in the presence of an ammonium salt as in this example.
- Example 5-b Production of tert-butylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate (second step: oxidation step)
- second step: oxidation step In a 1 L three-necked flask, 153 g of tert-butylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfinate (purity 86%, 345 mmol, 1.0 equivalent) obtained in Example 5-a was added to 600 g of chloroform.
- the organic layer thus obtained was washed with 200 g of a 10% aqueous sodium sulfite solution and 500 g of saturated sodium hydrogen carbonate, washed twice with 500 g of water, and then chloroform was distilled off.
- the obtained solid was dissolved in a mixed solvent of chloroform / ethyl acetate / diisopropyl ether and recrystallized to obtain 122 g of t-butylammonium t-butylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate. At this time, the purity was 99% and the yield was 89%.
- Fluorine ions (F ⁇ ) were not detected in any wastewater obtained in this step. From the t-butylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate obtained in this step, 380 ppb of sodium ion (Na + ) was detected.
- Example 5-c Production of triphenylsulfonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate (third step: onium salt exchange step)
- 122 g of (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate triethylammonium sulfonate obtained in Example 5-b (purity 99%, 307 mmol, 1.0 equivalent)) was added to 500 g of chloroform.
- Fluorine ions were not detected in any wastewater obtained in this step.
- 200 ppb of sodium ion Na + was detected from triphenylsulfonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate obtained in this step.
- the reaction system was filled with a nitrogen atmosphere, and the reaction solution was heated to 50 ° C. and stirred for 8 hours. After the reaction, the organic layer was recovered from the reaction solution separated into two layers, and the remaining aqueous layer was extracted with 50 g of acetonitrile. The organic layers were combined, the solvent was distilled off, 50 g of diisopropyl ether was added to the residue and suspended, and the mixture was stirred for 30 minutes at room temperature. This liquid was filtered, and the solvent was distilled off from the filtrate to obtain 12.4 g of a solid containing the desired sodium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfinate. At this time, the purity was 51% and the yield was 65%. Sodium ion (Na + ) contained in triethylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfinate obtained in this step was 1% or more.
- the obtained concentrated solution was dissolved in a mixed solvent of chloroform, ethyl acetate and diisopropyl ether, and recrystallized to obtain 9.0 g (yield) of the desired triphenylsulfonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate. 90%, purity 99%). From the triphenylsulfonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate obtained in this step, 3180 ppb of sodium ion (Na + ) was detected.
- reaction solution is separated into an organic layer and an aqueous layer, and the organic layer is distilled off (without washing with water, sodium thiosulfate aqueous solution or sodium sulfite aqueous solution) to remove the target (adamantane).
- 69 g of triethylammonium-1-ylmethyl) oxycarbonyldifluoromethanesulfinate was obtained. At this time, the purity was 62% and the yield was 85%.
- Sodium ion (Na + ) contained in triethylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfinate obtained in this step was 1% or more.
- the reaction solution was extracted twice with 100 g of dichloromethane, and the obtained organic layer was washed with water and brine, and dichloromethane was distilled off to distill off the desired (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate triethylammonium salt. 46 g was obtained. At this time, the purity was 71% and the yield was 74%.
- Sodium ion (Na + ) contained in triethylammonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate obtained in this step was 1% or more.
- Table 1 summarizes the above results with respect to yield, and Table 2 below summarizes the amount of sodium ions.
- an alkoxy useful as a photoacid generator and an intermediate thereof which is a part of a chemically amplified resist material suitable for microfabrication technology, particularly photolithography, in a manufacturing process of a semiconductor element or the like.
- Carbonyl fluoroalkanesulfonates can be provided in high yield and high purity under mild conditions and simple operation.
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Abstract
Description
・フッ化水素あるいはフッ化物塩等を副生することなく、したがって、使用する反応器の材質の制限を受けない。
・ナトリウム等の金属を除去する操作が簡便であり、高純度のアルコキシカルボニルフルオロアルカンスルホン酸塩を製造できる。
(一般式[1]中、Rは炭素数1~10の直鎖状もしくは分岐状のアルキル基、炭素数1~10の直鎖状もしくは分岐状の少なくとも末端部に重合性二重結合を有するアルケニル基、炭素数3~20の脂環式有機基、炭素数3~20の脂環式有機基と直鎖状のアルキレン基からなる有機基、炭素数3~30の単環式もしくは多環式ラクトン、あるいは炭素数6~20のアリール基を表す(ここで、該アルキル基、アルケニル基、脂環式有機基、脂環式有機基と直鎖状のアルキレン基からなる有機基、単環式もしくは多環式ラクトン及びアリール基上の水素原子の一部または全てはフッ素、ヒドロキシル基、ヒドロキシカルボニル基、炭素数1~6の直鎖状、分岐状もしくは環状のアルコキシ基で置換されていてもよい。また、該アルキル基、アルケニル基、脂環式有機基もしくは脂環式有機基と直鎖状のアルキレン基からなる有機基を構成する同一炭素上の2つの水素原子は1つの酸素原子で置換されケト基となっていてもよい。さらに該アルキル基上の水素原子の1つは、2-アクリロイルオキシ基、2-メタクリロイルオキシ基もしくは2-トリフルオロメタクリロイルオキシ基で置換されていてもよい)。R1およびR2は、それぞれ独立にフッ素原子もしくは炭素数1~6の直鎖、分岐鎖あるいは環状のパーフルオロアルキル基を表す。A+はアンモニウムイオンを表す。一般式[2]中、Xは塩素原子、臭素原子もしくはヨウ素原子を示し、R、R1およびR2は一般式[1]と同義である。一般式[3]中、R、R1、R2およびA+は一般式[1]と同義である。)
第2工程:一般式[3]で表されるアルコキシカルボニルフルオロアルカンスルフィン酸アンモニウム塩類を酸化剤と反応させ、前記一般式[1]で表されるアルコキシカルボニルフルオロアルカンスルホン酸アンモニウム塩類を得る工程。
第3工程:一般式[1]で表されるアルコキシカルボニルフルオロアルカンスルホン酸アンモニウム塩類を、下記一般式[5]で表される一価のオニウム塩類を用いて塩交換し、一般式[4]で表されるアルコキシカルボニルフルオロアルカンスルホン酸オニウム塩類を得る工程。
第1工程では、一般式[2]で表されるハロフルオロアルカン酸エステル類を、アミンもしくはアンモニウム塩の存在下、スルフィン化剤と反応させて(第1工程:スルフィン化工程)一般式[3]で表されるアルコキシカルボニルフルオロアルカンスルフィン酸アンモニウム塩類を得る。
第2工程では、第1工程で得られたアルコキシカルボニルフルオロアルカンスルフィン酸アンモニウム塩類[3]を酸化剤と反応させ、一般式[1]で表されるアルコキシカルボニルフルオロアルカンスルホン酸アンモニウム塩類を得る。
第3工程では、第2工程で得られた一般式[1]で表されるアルコキシカルボニルフルオロアルカンスルホン酸アンモニウム塩類を、一般式[5]で表される一価のオニウム塩を用いてオニウム塩交換し、一般式[4]で表されるアルコキシカルボニルフルオロアルカンスルホン酸オニウム塩類を得る。
一般式(a)におけるR1、R2及びR3としては具体的に以下のものが挙げられる。アルキル基として、メチル基、エチル基、n-プロピル基、イソプロピル基、シクロプロピル基、n-ブチル基、sec-ブチル基、イソブチル基、tert-ブチル基、n-ペンチル基、シクロペンチル基、n-ヘキシル基、n-ヘプチル基、2-エチルヘキシル基、シクロヘキシル基、シクロヘプチル基、4-メチルシクロヘキシル基、シクロヘキシルメチル基、n-オクチル基、n-デシル基、1-アダマンチル基、2-アダマンチル基、ビシクロ[2.2.1]ヘプテン-2-イル基、1-アダマンタンメチル基、2-アダマンタンメチル基等が挙げられる。アルケニル基としては、ビニル基、アリル基、プロペニル基、ブテニル基、ヘキセニル基、シクロヘキセニル基等が挙げられる。オキソアルキル基としては、2-オキソシクロペンチル基、2-オキソシクロヘキシル基、2-オキソプロピル基、2-オキソエチル基、2-シクロペンチル-2-オキソエチル基、2-シクロヘキシル-2-オキソエチル基、2-(4-メチルシクロヘキシル)-2-オキソエチル基等を挙げることができる。アリール基としては、フェニル基、ナフチル基、チエニル基等やp-メトキシフェニル基、m-メトキシフェニル基、o-メトキシフェニル基、p-エトキシフェニル基、p-tert-ブトキシフェニル基、m-tert-ブトキシフェニル基等のアルコキシフェニル基、2-メチルフェニル基、3-メチルフェニル基、4-メチルフェニル基、エチルフェニル基等のアルキルフェニル基、メチルナフチル基、エチルナフチル基等のアルキルナフチル基、ジエチルナフチル基等のジアルキルナフチル基、ジメトキシナフチル基、ジエトキシナフチル基等のジアルコキシナフチル基等が挙げられる。アラルキル基としては、ベンジル基、1-フェニルエチル基、2-フェニルエチル基等が挙げられる。アリールオキソアルキル基としては、2-フェニル-2-オキソエチル基、2-(1-ナフチル)-2-オキソエチル基、2-(2-ナフチル)-2-オキソエチル基等の2-アリール-2-オキソエチル基等が挙げられる。また、R1、R2及びR3のうちのいずれか2つ以上が相互に結合して硫黄原子を介して環状構造を形成する場合には、1,4-ブチレン、3-オキサ-1,5-ペンチレン等が挙げられる。更には置換基としてアクリロイルオキシ基、メタクリロイルオキシ基等の重合可能な置換基を有するアリール基が挙げられ、具体的には4-(アクリロイルオキシ)フェニル基、4-(メタクリロイルオキシ)フェニル基、4-ビニルオキシフェニル基、4-ビニルフェニル基等が挙げられる。
一般式(b)におけるR4-(O)n-基の置換基位置は特に限定されるものではないが、フェニル基の4位あるいは3位が好ましい。より好ましくは4位である。ここでnは0又は1である。R4としては、具体的に、メチル基、エチル基、n-プロピル基、sec-プロピル基、シクロプロピル基、n-ブチル基、sec-ブチル基、iso-ブチル基、tert-ブチル基、n-ペンチル基、シクロペンチル基、n-ヘキシル基、シクロヘキシル基、n-オクチル基、n-デシル基、n-ドデシル基、1-アダマンチル基、2-アダマンチル基、ビシクロ[2.2.1]ヘプテン-2-イル基、フェニル基、4-メトキシフェニル基、4-tert-ブチルフェニル基、4-ビフェニル基、1-ナフチル基、2-ナフチル基、10-アントラニル基、2-フラニル基、更にn=1の場合に、アクリロイル基、メタクリロイル基、ビニル基、アリル基が挙げられる。
一般式(c)におけるR4-(O)n-基の置換基位置は特に限定されるものではないが、フェニル基の4位あるいは3位が好ましい。より好ましくは4位である。ここでnは0又は1である。R4の具体例は上述した一般式(b)におけるR4と同じものを再び挙げることができる。
ブロモジフルオロ酢酸アダマンタン-1-イルメチルの製造(前工程:エステル化工程)
[ブロモジフルオロ酢酸アダマンタン-1-イルメチルの物性]
1H NMR(測定溶媒:重クロロホルム,基準物質:テトラメチルシラン);δ=3.92(s,2H;CH2),2.00(m,3H;1-Ad),1.62(m,12H;1-Ad).
19F NMR(測定溶媒:重クロロホルム,基準物質:トリクロロフルオロメタン);δ=-60.76(s,2F;CF2).
本工程で得られた廃水からはいずれもフッ素イオン(F-)は検出されなかった。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウムの製造(第1工程:スルフィン化工程:抽出溶媒=クロロホルム)
[(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウムの物性]
1H NMR(測定溶媒:重ジメチルホルムアミド,基準物質:テトラメチルシラン);δ=3.75(s,2H;CH2),3.07(q,J=7.5Hz,6H;Et3N),1.91(m,3H;1-Ad),1.61(m,6H;1-Ad),1.49(m,6H;1-Ad),1.17(t,J=7.5Hz,9H;Et3N).
19F NMR(測定溶媒:重ジメチルホルムアミド,基準物質:トリクロロフルオロメタン);δ=-120.92(s,2F;CF2).
本工程の反応液の水層側からフッ素イオン(F-)が微量(26ppm)検出された。本工程で得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウムからはナトリウムイオン(Na+)が5150ppb検出された。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウムの製造(第2工程:酸化工程:抽出溶媒=クロロホルム)
[(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウムの物性]
1H NMR(測定溶媒:重ジメチルホルムアミド,基準物質:テトラメチルシラン);δ=3.80(s,2H;CH2),3.10(q,J=7.5Hz,6H;Et3N),1.91(m,3H;1-Ad),1.62(m,6H;1-Ad),1.50(m,6H;1-Ad),1.17(t,J=7.5Hz,9H;Et3N).
19F NMR(測定溶媒:重ジメチルホルムアミド,基準物質:トリクロロフルオロメタン);δ=-108.56(s,2F;CF2).
本工程で得られた廃水からはいずれもフッ素イオン(F-)は検出されなかった。本工程で得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウムからはナトリウムイオン(Na+)が1580ppb検出された。
トリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートの製造(第3工程:オニウム塩交換工程)
[(トリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートの物性)]
1H NMR(測定溶媒:重クロロホルム,基準物質:テトラメチルシラン);δ=7.72(m,15H;TPS),3.85(s,2H;CH2),1.92(m,3H;1-Ad),1.62(m,12H;1-Ad).
19F NMR(測定溶媒:重クロロホルム,基準物質:トリクロロフルオロメタン);δ=-110.0(s,2F;CF2).
本工程で得られた廃水からはいずれもフッ素イオン(F-)は検出されなかった。また、本工程で得られたトリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートからはナトリウムイオン(Na+)が440ppb検出された。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウムの製造(第1工程:スルフィン化工程:抽出溶媒=ジクロロメタン)
実施例1-bと同様に反応を実施し、反応後、反応液を有機層と水層に分液し、有機層はアセトニトリルを留去して(クロロホルムの代わりに)ジクロロメタン300gを加え、ジクロロ溶液とした。得られた有機層を10%チオ硫酸ナトリウム水溶液、水で各1回洗浄し、ジクロロメタンを留去することで目的の(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウム112gを得た。このとき純度は89%、収率は79%であった。本工程の反応液の水層側からフッ素イオン(F-)が微量(15ppm)検出された。本工程で得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウムからはナトリウムイオン(Na+)が4500ppb検出された。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウムの製造(第2工程:酸化工程:抽出溶媒=ジクロロメタン)
1Lの3つ口フラスコ中、実施例2-aで得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウム110g(純度89%、239mmol,1.0当量))を水400gに溶解し、タングステン酸二ナトリウム二水和物0.118g(0.358mmol/0.0015等量)、30%過酸化水素水32.6g(287mmol/1.2当量)を加え、室温で2時間攪拌した。その後、19F NMRで反応液を確認したところ、(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウムは完全に消費され、ブロモジフルオロ酢酸アダマンタン-1-イルメチルの副生は<1%であった。反応液を(クロロホルムの代わりに)ジクロロメタン250gで2回抽出し、得られた有機層を水で1回洗浄し、ジクロロメタンを留去することで目的とする(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウム109gを得た。このとき純度は95%、収率は96%であった。本工程で得られた廃水からはいずれもフッ素イオン(F-)は検出されなかった。本工程で得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウムからはナトリウムイオン(Na+)が1170ppb検出された。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウムの製造(第2工程:酸化工程:水洗浄回数増加)
実施例1-cと同様に反応を行い、反応液をクロロホルム250gで2回抽出し、得られた有機層を水で(実施例1-cでの「1回」に代えて)5回洗浄し、クロロホルムを留去することで目的とする(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウム90.6gを得た。このとき純度は96%、収率は81%であった。本工程で得られた廃水からはいずれもフッ素イオン(F-)は検出されなかった。本工程で得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウムからはナトリウムイオン(Na+)が420ppb検出された。このように本実施例では、実施例1-cに比べて収率の低下が認められるが、ナトリウム含量はさらに著しく低減された。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸tert-ブチルアンモニウムの製造(第1工程:スルフィン化工程:アミン使用)
[(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸tert-ブチルアンモニウムの物性]
1H NMR(測定溶媒:重ジメチルホルムアミド,基準物質:テトラメチルシラン);δ=3.75(s,2H;CH2),1.91(m,3H;1-Ad),1.61(m,6H;1-Ad),1.49(m,6H;1-Ad),1.23(s,9H;tBuNH2).
19F NMR(測定溶媒:重ジメチルホルムアミド,基準物質:トリクロロフルオロメタン);δ=-121.01(s,2F;CF2).
本工程の反応液の水層側からフッ素イオン(F-)が微量(28ppm)検出された。本工程で得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸tert-ブチルアンモニウムからはナトリウムイオン(Na+)が5020ppb検出された。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸tert-ブチルアンモニウムの製造(第2工程:酸化工程:再結晶実施)
[(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸t-ブチルアンモニウムの物性]
1H NMR(測定溶媒:重ジメチルホルムアミド,基準物質:テトラメチルシラン);δ=3.80(s,2H;CH2),1.91(m,3H;1-Ad),1.63(m,6H;1-Ad),1.50(m,6H;1-Ad),1.20(s;tBuNH2).
19F NMR(測定溶媒:重ジメチルホルムアミド,基準物質:トリクロロフルオロメタン);δ=-108.60(s,2F;CF2).
本工程で得られた廃水からはいずれもフッ素イオン(F-)は検出されなかった。本工程で得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸t-ブチルアンモニウムからはナトリウムイオン(Na+)が360ppb検出された。このように本実施例では実施例1-bに比べて若干収率の低下が認められるが、ナトリウム含量はさらに著しく低減された。
トリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートの製造(第3工程:オニウム塩交換工程)
1Lの3つ口フラスコ中、実施例4-bで得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウム130g(純度99%、324mmol,1.0当量))をクロロホルム500gに溶解し、水400g、トリフェニルスルホニウムブブロミド116.8g(340mmol,1.05当量)を加え1時間攪拌した。反応後、反応液を有機層と水層に分液した。得られた有機層を水で洗浄し、クロロホルムを留去した。得られた濃縮液をクロロホルム・酢酸エチル・ジイソプロピルエーテル混合溶媒に溶解後、再結晶を行い、目的とするトリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートを176g(収率93%、純度99%)得た。本工程で得られた廃水からはいずれもフッ素イオン(F-)は検出されなかった。また、本工程で得られたトリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートからはナトリウムイオン(Na+)が220ppb検出された。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸tert-ブチルアンモニウムの製造(第1工程:スルフィン化工程:アンモニウム塩共存)
2Lの3つ口フラスコ中、実施例1-aで得られたブロモジフルオロ酢酸アダマンタン-1-イルメチル150g(455mmol,1.0当量)をアセトニトリル450gに溶解し、水400g、tert-ブチルアンモニウムクロリド59.9g(546mmol,1.2当量)、亜ジチオン酸ナトリウム95.1g(546mmol,1.2当量)を加えて2時間攪拌した。反応後、反応液を有機層と水層に分液し、有機層はアセトニトリルを留去してクロロホルム600gを加え、クロロホルム溶液とした。得られた有機層を10%チオ硫酸ナトリウム水溶液、水で各1回洗浄し、クロロホルムを留去することで目的の(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸tert-ブチルアンモニウム153gを得た。このとき純度は86%、収率は76%であった。本工程の反応液の水層側からフッ素イオン(F-)が微量(28ppm)検出された。本工程で得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸tert-ブチルアンモニウムからはナトリウムイオン(Na+)が4930ppb検出された。本実施例のようにアンモニウム塩を共存させることでもスルフィン化工程は実施出来ることが確認された。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸tert-ブチルアンモニウムの製造(第2工程:酸化工程)
1Lの3つ口フラスコ中、実施例5-aで得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸tert-ブチルアンモニウム153g(純度86%、345mmol,1.0当量)をクロロホルム600gに溶解し、0℃で70%メタクロロ過安息香酸89g(362mmol,1.05当量)を少量ずつ加え、その後、室温で1時間攪拌した。19F NMRで反応液を確認したところ、(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸t-ブチルアンモニウムは完全に消費され、ブロモジフルオロ酢酸アダマンタン-1-イルメチルの副生は確認されなかった。その後、得られた有機層を10%亜硫酸ナトリウム水溶液200g、飽和炭酸水素ナトリウム500g洗浄し、水500gで2回洗浄した後、クロロホルムを留去した。得られた固体をクロロホルム・酢酸エチル・ジイソプロピルエーテル混合溶媒に溶解後、再結晶を行い、目的とする(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸t-ブチルアンモニウム122gを得た。このとき純度は99%、収率は89%であった。本工程で得られた廃水からはいずれもフッ素イオン(F-)は検出されなかった。本工程で得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸t-ブチルアンモニウムからはナトリウムイオン(Na+)が380ppb検出された。
トリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートの製造(第3工程:オニウム塩交換工程)
1Lの3つ口フラスコ中、実施例5-bで得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウム122g(純度99%、307mmol,1.0当量))をクロロホルム500gに溶解し、水400g、トリフェニルスルホニウムブブロミド110.5g(322mmol,1.05当量)を加え1時間攪拌した。反応後、反応液を有機層と水層に分液した。得られた有機層を水で洗浄し、クロロホルムを留去した。得られた濃縮液をクロロホルム・酢酸エチル・ジイソプロピルエーテル混合溶媒に溶解後、再結晶を行い、目的とするトリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートを166g(収率92%、純度99%)得た。本工程で得られた廃水からはいずれもフッ素イオン(F-)は検出されなかった。また、本工程で得られたトリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートからはナトリウムイオン(Na+)が200ppb検出された。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸ナトリウムの製造(第1工程:スルフィン化工程)
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸ナトリウムの製造(第2工程:酸化工程)
トリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートの製造(第3工程:オニウム塩交換工程)
200mLの3つ口フラスコ中、比較例1-bで得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウムを含有する固体8.86g(内、(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸ナトリウムとして5.85g(16.9mmol,1.0当量))を水83gに加え、攪拌して懸濁させ、80℃まで昇温した。80℃で均一な溶液となった。この中にクロロホルム100g、トリフェニルスルホニウムブブロミド6.1g(17.7mmol,1.05当量)を加え1時間攪拌した。反応後、反応液を有機層と水層に分液した。得られた有機層を水で洗浄し、クロロホルムを留去した。得られた濃縮液をクロロホルム・酢酸エチル・ジイソプロピルエーテル混合溶媒に溶解後、再結晶を行い、目的とするトリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートを9.0g(収率90%、純度99%)得た。本工程で得られたトリフェニルスルホニウム(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホナートからはナトリウムイオン(Na+)が3180ppb検出された。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸ナトリウムの製造(第1工程:スルフィン化工程)
300mLの3つ口フラスコ中、ブロモジフルオロ酢酸アダマンタン-1-イルメチル40g(124mmol,1.0当量)をアセトニトリル120gに溶解し、水100g、亜ジチオン酸ナトリウム25.9g(149mmol,1.2当量)を加えて攪拌した。反応系内を窒素雰囲気とし、トリエチルアミン13.2g(130mmol,1.05当量)を20~35℃の温度範囲で加え、0.5時間攪拌した。反応後、反応液を有機層と水層に分液し、(水による洗浄、チオ硫酸ナトリウム水溶液もしくは亜硫酸ナトリウム水溶液による洗浄を実施せずに)有機層を溶媒留去することで目的の(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウム69gを得た。このとき純度は62%、収率は85%であった。本工程で得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウムに含有されるナトリウムイオン(Na+)は1%以上であった。
(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウムの製造(第2工程:酸化工程)
300mLの3つ口フラスコ中、得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウム69g(純度62%、105mmol,1.0当量))を水200gに溶解し、タングステン酸二ナトリウム二水和物0.052g(0.157ミリモル/0.0015等量)、30%過酸化水素水16.7g(147ミリモル/1.4当量)を加え、室温で4時間攪拌した。その後、19F NMRで反応液を確認したところ、(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウムは完全に消費され、ブロモジフルオロ酢酸アダマンタン-1-イルメチルの副生は21%であった。反応液をジクロロメタン100gで2回抽出し、得られた有機層を水、食塩水で洗浄し、ジクロロメタンを留去することで目的とする(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウム46gを得た。このとき純度は71%、収率は74%であった。本工程で得られた(アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルホン酸トリエチルアンモニウムに含有されるナトリウムイオン(Na+)は1%以上であった。
Claims (10)
- 次の2工程によりなる、一般式[1]で表されるアルコキシカルボニルフルオロアルカンスルホン酸アンモニウム塩類の製造方法。
第2工程:一般式[3]で表されるアルコキシカルボニルフルオロアルカンスルフィン酸アンモニウム塩類を酸化剤と反応させ、一般式[1]で表されるアルコキシカルボニルフルオロアルカンスルホン酸アンモニウム塩類を得る工程。
- 次の3工程によりなる、一般式[4]で表されるアルコキシカルボニルフルオロアルカンスルホン酸オニウム塩類の製造方法。
第2工程:一般式[3]で表されるアルコキシカルボニルフルオロアルカンスルフィン酸アンモニウム塩類を酸化剤と反応させ、一般式[1]で表されるアルコキシカルボニルフルオロアルカンスルホン酸アンモニウム塩類を得る工程。
第3工程:一般式[1]で表されるアルコキシカルボニルフルオロアルカンスルホン酸アンモニウム塩類を、一般式[5]で表される一価のオニウム塩類を用いて塩交換し、一般式[4]で表されるアルコキシカルボニルフルオロアルカンスルホン酸オニウム塩類を得る工程。
- 第1工程のスルフィン化反応後に得られた2-(アルキルカルボニルオキシ)-1,1-ジフルオロエタンスルフィン酸アンモニウム塩類の粗体を、有機溶媒で抽出し、その有機溶媒からなる層を、水で洗浄して精製し、含有する金属分を低減することを特徴とする請求項1乃至請求項3の何れかに記載の方法。
- 第1工程のスルフィン化反応後に得られた2-(アルキルカルボニルオキシ)-1,1-ジフルオロエタンスルフィン酸アンモニウム塩類の粗体を、有機溶媒で抽出し、その有機溶媒からなる層を、チオ硫酸金属塩水溶液もしくは亜硫酸金属塩水溶液で洗浄して精製することを特徴とする、請求項1乃至請求項4の何れかに記載の方法。
- 第2工程の酸化反応後に得られた2-(アルキルカルボニルオキシ)-1,1-ジフルオロエタンスルホン酸アンモニウム塩類の粗体を、有機溶媒で抽出し、その有機溶媒からなる層を、水で洗浄して精製し、含有する金属分を低減することを特徴とする、請求項1乃至請求項5の何れかに記載の方法。
- 下記一般式[3]で表される塩。
- 下記一般式[7]で表される塩。
- (アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸トリエチルアンモニウム。
- (アダマンタン-1-イルメチル)オキシカルボニルジフルオロメタンスルフィン酸tert-ブチルアンモニウム。
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