WO2008016100A1 - Procédé servant à produire un composé de 2,2-dioxyde de 3,4-dihydro-1,2,3-oxathiazin-4-one ou un sel de celui-ci - Google Patents
Procédé servant à produire un composé de 2,2-dioxyde de 3,4-dihydro-1,2,3-oxathiazin-4-one ou un sel de celui-ci Download PDFInfo
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- WO2008016100A1 WO2008016100A1 PCT/JP2007/065138 JP2007065138W WO2008016100A1 WO 2008016100 A1 WO2008016100 A1 WO 2008016100A1 JP 2007065138 W JP2007065138 W JP 2007065138W WO 2008016100 A1 WO2008016100 A1 WO 2008016100A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D291/00—Heterocyclic compounds containing rings having nitrogen, oxygen and sulfur atoms as the only ring hetero atoms
- C07D291/02—Heterocyclic compounds containing rings having nitrogen, oxygen and sulfur atoms as the only ring hetero atoms not condensed with other rings
- C07D291/06—Six-membered rings
Definitions
- the present invention relates to a 3,4 dihydro-1,2,3 oxathiazin-4-one 2,2 dioxide compound or a salt thereof useful as a sweetener in the food industry, a raw material thereof, or an intermediate raw material of fine chemicals. It relates to the manufacturing method.
- Patent Document 1 describes that an organic layer obtained by liquid separation after the hydrolysis can be purified by extraction with water or dilute aqueous sulfuric acid.
- water is used for the hydrolysis of the cyclization reaction product, there is a problem that the subsequent purification load of the target compound is increased, and the coloring of the organic layer obtained by liquid separation after hydrolysis is significant.
- the hue of the organic layer is not improved so much.
- Patent Document 1 Japanese Patent Laid-Open No. 62-56481
- Patent Document 2 Japanese Patent Laid-Open No. 62 129277
- Patent Document 3 Japanese Patent Application Laid-Open No. 2005-263779
- the object of the present invention is to provide high quality 3,4 dihydro-1,2,3 oxathiazine-4-one
- the object is to provide a method for easily and efficiently obtaining a 2,2-dioxide compound or a salt thereof.
- the present inventors have determined that a sulfuric acid aqueous solution so that the sulfuric acid concentration in the aqueous layer after hydrolysis of the reaction product obtained by the cyclization reaction is not less than a specific concentration.
- a sulfuric acid aqueous solution so that the sulfuric acid concentration in the aqueous layer after hydrolysis of the reaction product obtained by the cyclization reaction is not less than a specific concentration.
- R 1 and R 2 are the same or different and each represents a hydrogen atom or an organic group inert to the reaction;
- R 3 represents a hydrogen atom or an organic group inert to the reaction
- X represents a hydrogen atom) ⁇ -ketoamide- sulfonic acid or a salt thereof dissolved or dispersed in an inert solvent
- the sulfuric acid aqueous solution used for hydrolysis in step (A) is preferably a sulfuric acid aqueous solution having a concentration of 15 to 50% by weight.
- the sulfuric acid aqueous solution used in step (B) is preferably a sulfuric acid aqueous solution having a concentration of 45 to 80% by weight! /.
- the cleaning liquid obtained after washing in the step (B) is used as the sulfuric acid aqueous solution for hydrolysis in the step (A).
- hydrolysis of the cyclized product and / or washing of the organic layer after hydrolysis is performed using a sulfuric acid aqueous solution having a specific concentration, so that the hue of the organic solvent solution containing the target compound is And the subsequent purification load can be greatly reduced.
- ⁇ -ketoamide- ⁇ sulfonic acid or a salt thereof represented by the above formula (1) is dissolved or dispersed in an inert solvent, and an acid anhydride is dissolved or dispersed in the inert solvent.
- the resulting mixed solution is subjected to a cyclization reaction, and then further subjected to a hydrolysis reaction, and the 3,4 dihydro-1,2,3 oxathiazine 4 on 2,2 dioxide compound represented by the above formula (2) Or the salt is manufactured.
- the organic group inert to the reaction in R 1 , R 2 and R 3 is not particularly limited as long as it is inert to the reaction, and examples thereof include an alkyl group and an alkenyl group. And an alkynyl group, a cycloalkyl group, an acyl group, an aralkyl group, and an aryl group.
- the alkyl group includes a linear or branched C alkyl group (for example, a methyl group, an ethyl group).
- C alkynoles such as til, propyl, butyl, isobutyl, tert butyl
- Alkenyl groups include straight or branched C alkenyl groups (e.g.
- alkynyl groups include linear or branched C
- Alkynyl groups (for example, C alkynyl groups such as ethur, propynyl, 1-butul, 2-butul, etc.) are included.
- Examples of the cycloalkyl group include cyclo C cyclo, such as propyl, cyclobutyl, cyclopentyl, cyclohexyl
- alkyl groups preferably C cycloalkyl groups
- acyl group may be linear or
- Is a branched c aliphatic acyl group e.g., acetyl group, propionyl group, pentyl group
- the salt of the / 3-ketoamide-N sulfonic acid compound represented by the formula (1) includes a salt in which a sulfonic acid group is neutralized with a base (sulfonate), and R 3 is a hydrogen atom.
- the salt in which —NH group is neutralized with a base is included.
- Examples of such salts include metal salts, ammonium salts, and organic base salts.
- metal salts of the metal salt include salts of alkali metals (group 1A metals) such as Li, Na, and K; salts of alkaline earth metals (group 2A metals of the periodic table) such as Mg, Ca, Sr, and Ba; Periodic Table 3B metal salts such as Al and Ga; Transfer metals (for example, Periodic Table Group 3A Metal, Periodic Table Group 4A Metal, Periodic Table Group 5A Metal, Periodic Table Group 6A Metal, Mn etc. Periodic Table Group 7A Periodic table of metals, Fe, etc. Periodic table of Cu, Ag, Au, etc. Group IB metals, Periodic table of Zn, etc.
- alkali metals group 1A metals
- group 2A metals of the periodic table such as Mg, Ca, Sr, and Ba
- Periodic Table 3B metal salts such as Al and Ga
- Transfer metals for example, Periodic Table Group 3A Metal, Periodic Table Group 4A Metal, Periodic Table Group 5A Metal, Periodic Table Group 6A
- Preferred metal salts include: !! to trivalent metal salts, such as alkali metal (Na, K, etc.) salts, alkaline earth metal (Mg, Ca, etc.) salts, A1 salts, reduced metals (Mn, Fe) and the like.
- alkali metal salts such as Na and K are particularly preferable.
- Examples of the organic base include aliphatic amines [primary amines (eg, C monoalkylamines such as methylamine, ethylamine, etc.), secondary amines (eg, dimethylamine).
- primary amines eg, C monoalkylamines such as methylamine, ethylamine, etc.
- secondary amines eg, dimethylamine
- Di-C alkylamines such as ethylmethylamine
- tertiary amines eg trimethyl
- Triamines such as ruamine, triethylamine, etc.
- cycloaliphatic amines e.g.,
- Mono-, di- or tri-C cycloalkylamines such as cyclohexylamine), aromatics
- Min for example, mono-C arylamines such as aniline, dimethylaniline, diphenyla
- Di-C arylenoamines such as min
- tri-C arylenoamines such as triphenylenoamine
- Aralkylamines such as ziramine), cyclic amines (eg piperidine, N-methyl) And rubiperidine, morpholine, etc.), nitrogen-containing aromatic heterocyclic compounds (eg, pyridine, quinoline, or derivatives thereof).
- Preferred organic bases include aliphatic amines. Further, not only aliphatic but also tertiary amine is preferable.
- R 1 and R 2 are each a hydrogen atom or a C alkyl group
- R 3 is a hydrogen atom or a C alkyl group
- a combination of 1-4 1-4 groups is preferred.
- compounds represented by the formula (1) include acylacetamido N-sulfonic acid in which R 1 is a C alkyl group, R 2 and R 3 are hydrogen atoms.
- acetacetamido-N-sulfonic acid in which R 1 is a methyl group is preferred.
- the salt of the compound represented by the formula (1) (sulfonate) is particularly preferably a salt with a tertiary amine.
- the acid anhydride is a cyclizing agent (cyclized dehydration) of ⁇ -ketoamide- ⁇ -sulfonic acid represented by the formula (1) or a salt thereof (hereinafter sometimes simply referred to as “substrate”). Act as an agent).
- acid anhydrides include sulfuric acid, halogenated sulfuric acid (such as fluorosulfuric acid, chlorosulfuric acid), pyrophosphoric acid (such as pyrophosphoric acid; halogenated pyrophosphoric acid such as fluoropyrophosphoric acid), nitric acid, boric acid (orthoboric acid, metaboric acid).
- Inorganic acids such as acid); sulfonic acid, organic phosphoric acid (C alkylphosphoric acid such as methylphosphoric acid; monomethyl phosphate, monophosphoric acid
- An acid anhydride is an acid anhydride formed by desorbing water from one molecule of acid, an acid anhydride formed by desorbing water from two or more identical acids, and water desorbing from two or more different acids. Any of the acid anhydrides (mixed acid anhydrides) produced in this way may be used.
- the acid anhydrides can be used alone or in admixture of two or more.
- a preferred acid anhydride is an acid anhydride formed from an acid containing sulfuric acid, and sulfuric acid anhydride (SO 4) is particularly preferred.
- the acid anhydride is usually used in a proportion of at least 1 mol or more (for example, 1 to 20 mol), preferably 1 to 10 mol, particularly preferably about 4 to 8 mol, relative to 1 mol of the substrate.
- the cyclization reaction (cyclization dehydration reaction, etc.) of / 3-ketoamide-N-sulfonic acid or a salt thereof represented by the formula (1) is performed in the presence of a solvent.
- a solvent various inorganic or organic solvents that are inert to the reaction (especially not reacting with an acid anhydride) can be used. Usually, an organic solvent that is inert to the reaction is used.
- a substantially anhydrous solvent is usually used. It is.
- the inert solvent for dissolving or dispersing / 3-ketoamide-N-sulfonic acid or a salt thereof represented by the formula (1) and the inert solvent for dissolving or dispersing the acid anhydride are the same. Or different.
- the inert solvent examples include aliphatic hydrocarbons (eg, pentane, hexane, octane, etc.), alicyclic hydrocarbons (eg, cyclohexane, etc.), aromatic hydrocarbons (eg, benzene, toluene, Xylene, ethylbenzen, etc.), halogenated hydrocarbons (dichloromethane, dichloroethane, chloroform, formaldehyde, ethylene, tetrachloroethylene, trichlorophenol, ethylene, etc.), esters (eg, methyl acetate, ethyl acetate, Carboxylic acid esters such as butyl acetate and methyl propionate), ketones (eg, aliphatic ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone; cyclic ketones such as cyclohexanone), ether
- sulfoxides for example, dimethyl sulfoxide, sulfolane, 2-methylsulfolane, 3-methylsulfolane, etc.
- solvents may be used alone or in combination of two or more.
- Preferable solvents include halogenated hydrocarbons, and dichloromethane is particularly preferably used.
- the cyclization reaction is preferably carried out continuously using a flow-type continuous reactor.
- a tubular reactor or a static mixer is preferably used.
- the substrate and acid anhydride to be subjected to the reaction are each dissolved or dispersed in the above-mentioned solvent, for example, 10 ° C or less (one 100 ° C to about 10 ° C), Preferably, it is preferably ⁇ 80 ° C. to 10 ° C., particularly preferably from 30 ° C. to 10 ° C.
- the substrate concentration in the substrate-containing mixed solution supplied to the reactor can be appropriately selected within the range that does not impair the operability, etc., but is usually 0. !!
- the acid anhydride concentration in the acid / anhydride-containing mixture supplied to the reactor can also be appropriately selected within a range that does not impair operability.
- the amount is usually about 0.5 to 50% by weight, preferably about 0.5 to 30% by weight, and more preferably about 5 to 20% by weight.
- the total amount of the reaction solvent can be appropriately selected in consideration of reactivity, operation, etc. In general, it can be selected from a wide range of about! To 1000 parts by weight with respect to 1 part by weight of the substrate, preferably Is about 5 to 500 parts by weight, more preferably about 10 to about 100 parts by weight, particularly preferably about 15 to 50 parts by weight.
- the cyclization reaction is preferably performed in a flow-through tubular reactor or a static mixer, which may include a cooling device for cooling from the outside, such as a refrigerant jacket and a cooling tank (refrigerant tank).
- a cooling device for cooling from the outside such as a refrigerant jacket and a cooling tank (refrigerant tank).
- This is achieved by continuously supplying a mixture of / 3-ketoamide-N-sulfonic acid or its salt and an inert solvent represented by (1), and a mixture of an acid anhydride and an inert solvent. Is called.
- the reaction temperature of the cyclization reaction can be appropriately set in consideration of the reaction rate and the like.
- the tubular reactor a general stainless steel tube, a lining tube such as glass or Teflon (registered trademark), etc. can be used, but the material is not limited to these.
- the inner diameter of the tube used is not particularly limited, but considering the removal of heat generated during the cyclization reaction, the inner diameter is preferably several tens of mm or less (for example, about 0.2 to 30 mm). It is particularly preferable that the inner diameter is 10 mm or less (for example, about 0.2 to 10 mm).
- the length of the tube is the length necessary to satisfy the residence time required for the reaction.
- the residence time is about 0.00;! To 60 seconds, preferably 0.0;! To 40 seconds, and more preferably 0.;! To 10 seconds (particularly ;! to 10 seconds).
- the residence time (seconds) is a value calculated from the reactor volume (ml) / total feed amount of raw material mixture (ml / second).
- the tubular reactor includes, as an apparatus for promoting mixing of the / 3-ketoamide-N-sulfonic acid represented by the formula (1) or a salt thereof and an acid anhydride, a stirring mixer, Install an ultrasonic mixer, a static mixer such as a static mixer, or a pipe joint (hereinafter referred to simply as “premixer”) at the inlet of the tubular reactor.
- a premixer When a premixer is installed at the inlet of the tubular reactor, the residence time in the premixer is preferably 0.0005 to 30 hours, preferably 0.0;!
- the subsequent residence time in the tubular reactor is, for example, 0.001 to 60 times, preferably 0.0; Less, more preferably 0.;! ⁇ 30 less (especially;! ⁇ 30 less) Degree.
- a static mixer such as a static mixer can also be used as the reactor.
- a static mixer is used as a reactor, since it has a high heat removal capability, it is possible to use a reactor having a larger inner diameter than the above tubular reactor.
- the inner diameter of the static mixer is about 0.2 to 30 mm, preferably about 0.5 to 20 mm.
- the type of the static mixer is not particularly limited, but as a typical static mixer, a through-the-machine type static mixer, a Kenix type static mixer, or the like can be used.
- the residence time is, for example, about 0.00;! To 60 seconds, preferably 0.0;! To 40 seconds, more preferably 0.03 to 10 seconds. .
- a preliminary mixer as described above may be provided at the entrance of the static mixer.
- the residence time in the premixer in this case is, for example, 0.005 to 30 hours, preferably 0.0;! To 20 hours, more preferably 0;! To 10 hours (particularly;! To
- the residence time in the static mixer after that is, for example, 0.00;! To 60 seconds, preferably 0.0;! To 40 hours, and more preferably 0.03 to ; About 10 less.
- the number of elements of the static mixer is not particularly limited, but is, for example, 5 or more (about 5 to 25), preferably 10 or more.
- Hydrolysis is performed, for example, by subjecting the reaction solution obtained by the cyclization reaction to an appropriate treatment as necessary, and then mixing water or a water-containing solution (for example, an aqueous sulfuric acid solution). It is broken. Hydrolysis may be performed by any method such as a continuous method, a batch method, and a semi-batch method. In the case of continuous hydrolysis, in addition to using a stirring tank, the continuous cyclization reaction is used. A processing device can also be used. The temperature of the water or water-containing liquid used for the hydrolysis reaction and the reaction temperature are, for example, 0 to 50 ° C, preferably 10 to 40 ° C.
- the amount of water is, for example, 1 to 100 moles, preferably 1 to 50 moles, more preferably 2 to 20 moles per mole of acid anhydride used in the cyclization reaction. It is about a mole. A large excess of water may be used.
- the reaction time of the hydrolysis reaction is, for example, within 1 hour (about 0.1 minute to 1 hour), and preferably about! To 10 minutes.
- the 4-on-2,2 dioxide compound can be separated and purified by separation means such as washing, liquid separation, concentration, solvent exchange, extraction, crystallization, recrystallization, column chromatography and the like.
- separation means such as washing, liquid separation, concentration, solvent exchange, extraction, crystallization, recrystallization, column chromatography and the like.
- the reaction solution after completion of hydrolysis is separated into an organic layer (inert solvent layer) containing the target compound and an aqueous layer, and the organic layer is washed with water or a water-containing solution (for example, an aqueous sulfuric acid solution).
- the target compound can be isolated by performing operations such as concentration, solvent exchange, and crystallization.
- a solvent that is incompatible with water (or immiscible) [solvent used in the cyclization reaction or organic mono- or dicarboxylic acid ester (such as the ester exemplified in the reaction solvent section) Etc.] to extract and recover the target compound remaining in the aqueous layer.
- An important feature of the production method of the present invention is that, in the step after the cyclization reaction, (A) the sulfuric acid concentration in the aqueous layer after hydrolysis of the reaction product obtained by the cyclization reaction is 30% by weight. Mixing with an aqueous sulfuric acid solution and hydrolyzing it to separate the organic layer from the aqueous layer, and (B) Calo Washing the organic layer after the water decomposition reaction with an aqueous sulfuric acid solution having a concentration of 30% by weight or more It includes at least one process selected from the group consisting of processes.
- step (A) when the reaction mixture after hydrolysis is separated into an organic layer (including the target compound) and an aqueous layer, it is separated neatly into an organic layer containing impurities (colored substances, etc.).
- the organic layer (the target compound-containing solution) having a good hue (low coloration) and a low impurity content can be obtained.
- step (B) impurities (colored substances, etc.) contained in the organic layer migrate to the aqueous layer made of a sulfuric acid aqueous solution, and the hue and impurity content of the organic layer are greatly improved. .
- step (A) and / or step (B) the subsequent purification step can be simplified, the purification load can be reduced, and thus a high-quality target compound can be obtained easily and efficiently.
- force S More specifically, coloring components resulting from cyclization reaction and hydrolysis Has a feature that it is difficult to remove even after a subsequent purification step, for example, crystallization operation or activated carbon treatment.
- the compound represented by the formula (2) is derived from its salt. However, if the compound represented by the formula (2) contains a coloring component, it is removed even in the purification step of the salt. Due to the color, the crystallization operation must be repeated several times.
- the product loss in the filtrate is large and the yield is reduced. Therefore, the reuse of the filtrate is indispensable in the salt production process. Since the hue of the salt crystallization filtrate is significantly deteriorated, it is difficult to reuse. According to the production method of the present invention, since the coloring component can be efficiently removed, the crystallization operation of the salt of the compound represented by the formula (2) can be reduced to, for example, 1 to 2 times, and the purification process is simplified. Can be In addition, it is possible to reuse the filtrate produced by the crystallization operation, and the yield is improved.
- the production method of the present invention may include at least one of step (A) and step (B).
- step (A) when performing step (A), it is not always necessary to wash the organic layer after the hydrolysis reaction with an aqueous sulfuric acid solution having a concentration of 30% by weight or more. For example, water or a concentration of less than 30% by weight The washing operation may be omitted using a sulfuric acid aqueous solution or the like.
- step (B) hydrolysis of the reaction product obtained by the cyclization reaction is always performed so that the sulfuric acid concentration in the aqueous layer after hydrolysis is 30% by weight or more.
- water may be used for hydrolysis.
- the sulfuric acid concentration in the aqueous layer after hydrolysis may be 30% by weight or more (eg, 30 to 80% by weight), preferably 35 to 75% by weight, more preferably 40%. It is -70 weight%, More preferably, it is 45-70 weight%. If the sulfuric acid concentration in the aqueous layer after hydrolysis is too low, the hue of the organic layer obtained by liquid separation deteriorates, and the liquid separation property tends to deteriorate soon. On the other hand, if the sulfuric acid concentration in the aqueous layer after hydrolysis is too high, the organic layer after separation may become cloudy or the liquid separation property may deteriorate.
- the concentration of the sulfuric acid aqueous solution used for the hydrolysis is preferably 15 to 50% by weight, more preferably 20 to 45% by weight, particularly preferably about 20 to 40% by weight. If the concentration of the sulfuric acid aqueous solution used for the hydrolysis is too low, the hue of the organic layer to be obtained deteriorates and the liquid separation property tends to decrease soon. On the other hand, sulfuric acid used for hydrolysis If the concentration of the solution is too high, the organic layer may become cloudy, the liquid separation property may decrease, or the partition ratio of the target compound to the organic layer may decrease.
- the amount of the sulfuric acid aqueous solution used for the hydrolysis may be an amount that contains an amount of water necessary for the hydrolysis and the concentration of sulfuric acid after the hydrolysis is within the above range.
- the amount of sulfuric acid aqueous solution used for hydrolysis varies depending on the type and amount of acid anhydride used, but generally 80 to 400 parts by weight, preferably 100 parts by weight of acid anhydride used, preferably About 100 to 300 parts by weight.
- the concentration of the sulfuric acid aqueous solution used for washing the organic layer after the hydrolysis reaction may be 30 wt% or more (for example, 30 to 80 wt%), preferably 45 to 80 wt%.
- the amount is more preferably 50 to 80% by weight, still more preferably 60 to 78% by weight. If the concentration of the sulfuric acid aqueous solution used for the washing is too low, the effect of improving the hue of the organic layer is small, and the liquid separation property tends to be lowered. On the other hand, if the concentration of the sulfuric acid aqueous solution used for the washing is too high, the organic layer may become cloudy or the liquid separation property may be lowered.
- the amount of the sulfuric acid aqueous solution used for the washing is, for example, about! To 100 parts by weight, preferably about 2 to 50 parts by weight with respect to 100 parts by weight of the organic layer to be used for washing. From the washed organic layer, the target compound with good quality can be obtained by performing operations such as concentration, solvent exchange and crystallization as described above.
- the washing solution after washing in the step (B) can be used as it is, or appropriately diluted or concentrated, and used as the sulfuric acid aqueous solution for hydrolysis in the step (A).
- the cleaning solution as an aqueous sulfuric acid solution for hydrolysis, the amount of waste treated and discarded can be significantly reduced, and the compound represented by formula (2) contained in the cleaning solution Use force S to recover.
- the salt of the 3,4 dihydro-1,2,3oxathiazine 4one 2,2-dioxide compound represented by the formula (2) is a compound represented by the formula (2) (R 3 is hydrogen
- the compound which is an atom) can be obtained by subjecting it to a conventional salt formation reaction such as reaction with a base.
- Examples of the salt of the 3,4 dihydro-1,2,3 oxathiazine 4 on 2,2 dioxide compound represented by the formula (2) include metal salts, ammonium salts, and salts of organic bases.
- the type of metal salt, the type of organic base, and preferred examples are the same as in the case of the salt of the / 3-ketoamide-N sulfonic acid compound represented by the above formula (1).
- Particularly preferred salts are sodium And alkali metal salts such as potassium salt and potassium salt.
- Equation (2) 3 4-dihydro-1 represented by, 2, 3 Okisachiajin 4 alkali metal salts on 2, 2-dioxide compound, the compound represented by formula (2) (R 3 is a hydrogen atom
- R 3 is a hydrogen atom
- alkali metal hydroxides sodium hydroxide, potassium hydroxide, etc.
- alkali metal carbonates sodium carbonate, potassium carbonate, etc.
- alkali metal hydrogen carbonates sodium bicarbonate, hydrogen carbonate, etc.
- the salt of the 3,4 dihydro-1,2,3oxathiazine-4-one 2,2 dioxide compound represented by the formula (2) is, for example, concentrated, extracted, crystallized, recrystallized, column chromatography, etc. Separation and purification can be performed by separation means.
- R 4 is a methyl group
- 3, 4 dihydro-1,2,3 oxathiazin-4-one 2,2 dioxide compound (for example, 6 methyl-3,4 dihydro-1,2) , 3 oxathiazine-4-one 2, 2 dioxide, etc.) are preferred because they are used as a sweetener in the food industry for their physiologically acceptable salts (for example, salts with Na, K, Ca, etc.).
- a salt with potassium is particularly useful as acesulfame (acesulfame K).
- Example 1 A stainless steel tube with an inner diameter of 4 mm and an effective length of 2 m equipped with a Kenix type static mixer with an inner diameter of 3/4 mm, a length of 10 cm and 17 elements as a raw material mixer (preliminary mixer) was used as a reactor. Carried out. Acetacetamido-N, 0.747 mol of triethyl ammonium sulfonate, was dissolved in 1885 g of dichloromethane and cooled to 10 ° C. Further, 2.70 mmol of sulfuric anhydride was dissolved in 1784 g of dichloromethane and cooled to 10 ° C.
- acetacetamide-N triethylammonium sulfonate solution was 201 g / min and sulfuric anhydride solution was 200 g / min continuously for 10 minutes. Injected. The residence time was 5.1 seconds.
- the reaction solution was continuously withdrawn into a 2 L separable flask while stirring at 500 rpm, and a 40 wt% aqueous sulfuric acid solution was simultaneously supplied at a rate of 37 g / min for hydrolysis.
- a hydrolysis reaction was performed at 15 to 25 ° C., and the reaction solution was continuously withdrawn and allowed to stand to separate a dichloromethane layer and an aqueous layer.
- the sulfuric acid concentration in the aqueous layer was 52% by weight.
- the absorbance analysis at 344 nm of the dichloromethane layer was performed, the absorbance was 0.531.
- the yield acetoacetamido-N triethylammonium sulfonate was obtained. 70%).
- a stainless steel tube with an inner diameter of 4 mm and an effective length of 2 m equipped with a Kenix type static mixer with an inner diameter of 3/4 mm, a length of 10 cm and 17 elements as a raw material mixer (preliminary mixer) is used as a reactor. Carried out. Acetacetamido-N 0.47 mol of triethyl ammonium sulfonate was dissolved in 1885 g of dichloromethane and cooled to 10 ° C. Further, 2.70 mmol of sulfuric anhydride was dissolved in 1784 g of dichloromethane and cooled to 10 ° C.
- acetacetoamide-N-triethylammonium sulfonate solution is 201 g / min and sulfuric anhydride solution is 200 g / min continuously for 10 minutes. Injected. The residence time was 5.1 seconds.
- the reaction solution was continuously withdrawn into a 2 L separable flask while stirring at 500 rpm, and a 40 wt% aqueous sulfuric acid solution was simultaneously supplied at a rate of 37 g / min for hydrolysis.
- a hydrolysis reaction was performed at 15 to 25 ° C., and the reaction solution was continuously withdrawn and allowed to stand to separate a dichloromethane layer and an aqueous layer.
- Aqueous sulfuric acid concentration The degree was 52% by weight.
- a 75 wt% aqueous sulfuric acid solution was added to the extracted dichloromethane layer at a ratio of 0.05 part by weight with respect to 1 part by weight of the dichloromethane layer, and stirred sufficiently. After stirring, the mixture was allowed to stand for liquid separation.
- the obtained organic layer (dichloromethane layer) was subjected to absorbance analysis at 344 nm, the absorbance was 0.261.
- the organic layer (Jikurorome Tan layer) Included 6-methyl 3, 4-dihydro-one 1, 2, 3 Okisachiajin one 4 - one 2, the results of quantitative 2-dioxide in HPLC, the yield ( ⁇ Cetacetamido-N—triethylammonium sulfonate)) was 65%.
- the washing liquid after washing (sulfuric acid aqueous solution layer) is included in the washing liquid because it can be used as part of the sulfuric acid aqueous solution for hydrolysis in the hydrolysis process. 6 Methyl-3,4 dihydro-1,2,3 oxothiazin-4-one 2,2-dioxide can be recovered in its entirety.
- a stainless steel tube with an inner diameter of 4 mm and an effective length of 2 m equipped with a Kenix type static mixer with an inner diameter of 3/4 mm, a length of 10 cm and 17 elements as a raw material mixer (preliminary mixer) was used as a reactor. Carried out. Acacetoamide-N triethyl ammonium sulfonate 0.82 mol was dissolved in 3390 g of dichloromethane and cooled to 10 ° C. Further, 4.90 mmol of sulfuric anhydride was dissolved in 3241 g of dichloromethane, and cooled to 10 ° C.
- the sulfuric acid concentration in the aqueous layer was 26% by weight.
- the absorbance was 0.845.
- the 6-methyl 3,4 dihydro-1,2,3-oxathiazine 4-one 2,2 dioxide contained in the dichloromethane layer was quantified by HPLC, and the yield (acetoacetamide-N triethylammonium sulfonate) was determined. 70%).
- Industrial applicability 3,4-Dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide compounds or their salts useful as sweeteners in the food industry or their raw materials, or as intermediate materials for fine chemicals! /
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/373,922 US7662957B2 (en) | 2006-08-03 | 2007-08-02 | Method for producing 3,4-dihydro-1,2,3-oxathiazin-4-one-2,2-dioxide compound or salt thereof |
| DE112007001772T DE112007001772T5 (de) | 2006-08-03 | 2007-08-02 | Verfahren zum Herstellen einer 3,4-Dihydro-1,2,3-oxathiazin-4on-2,2-dioxid-Verbindung oder eines Salzes davon |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006212263A JP2008037778A (ja) | 2006-08-03 | 2006-08-03 | 3,4−ジヒドロ−1,2,3−オキサチアジン−4−オン−2,2−ジオキサイド化合物又はその塩の製造法 |
| JP2006-212263 | 2006-08-03 |
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| WO2008016100A1 true WO2008016100A1 (fr) | 2008-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/065138 Ceased WO2008016100A1 (fr) | 2006-08-03 | 2007-08-02 | Procédé servant à produire un composé de 2,2-dioxyde de 3,4-dihydro-1,2,3-oxathiazin-4-one ou un sel de celui-ci |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7662957B2 (ja) |
| JP (1) | JP2008037778A (ja) |
| CN (1) | CN101501010A (ja) |
| DE (1) | DE112007001772T5 (ja) |
| WO (1) | WO2008016100A1 (ja) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5678449B2 (ja) * | 2010-03-25 | 2015-03-04 | Jsr株式会社 | 感放射線性組成物 |
| CN103097297B (zh) * | 2010-04-19 | 2016-05-04 | 国际人造丝公司 | 制备铵盐的方法 |
| US9024016B2 (en) * | 2012-06-08 | 2015-05-05 | Nutrinova Nutrition Specialists & Food Ingredients GmbH | Process for producing acesulfame potassium |
| JP6303943B2 (ja) * | 2013-09-30 | 2018-04-04 | Jsr株式会社 | 感放射線性樹脂組成物及びレジストパターン形成方法 |
| CN112898230A (zh) | 2016-09-21 | 2021-06-04 | 国际人造丝公司 | 乙酰舒泛钾组合物和其生产方法 |
| US10023546B2 (en) | 2016-09-21 | 2018-07-17 | Celanese International Corporation | Acesulfame potassium compositions and processes for producing same |
| CN118459423A (zh) | 2016-09-21 | 2024-08-09 | 国际人造丝公司 | 乙酰舒泛钾组合物和用于生产其的方法 |
| WO2018057387A1 (en) | 2016-09-21 | 2018-03-29 | Celanese International Corporation | Acesulfame potassium compositions and processes for producing same |
| US11434214B2 (en) * | 2017-12-15 | 2022-09-06 | Chemadvice Gmbh | Process for the preparation of an acesulfame in a spray reactor having a specific velocity of flow |
| EP3740471B9 (en) * | 2018-01-18 | 2023-10-04 | ChemAdvice GmbH | Process for the preparation of an acesulfame with sulphuric acid processing |
| CN112480032A (zh) * | 2020-11-30 | 2021-03-12 | 安徽金禾实业股份有限公司 | 一种安赛蜜生产中二次母液的回收利用方法 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6256481A (ja) * | 1985-09-03 | 1987-03-12 | ヘキスト アクチェンゲゼルシャフト | 6−メチル−3、4−ジヒドロ−1、2、3−オキサチアジン−4−オン−2、2−ジオキサイドの無毒性塩の製造方法 |
| JPS6256480A (ja) * | 1985-09-03 | 1987-03-12 | ヘキスト アクチェンゲゼルシャフト | 6−メチル−3、4−ジヒドロ−1、2、3−オキサチアジン−4−オン−2、2−ジオキサイドの製造方法およびその精製方法 |
| JPS62129277A (ja) * | 1985-07-29 | 1987-06-11 | ヘキスト アクチェンゲゼルシャフト | 6−メチル−3、4−ジヒドロ−1、2、3−オキサチアジン−4−オン−2、2−ジオキシドの製法 |
| JP2003002879A (ja) * | 2001-06-22 | 2003-01-08 | Daicel Chem Ind Ltd | オキサチアジン類の製造方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005263779A (ja) | 2004-02-17 | 2005-09-29 | Daicel Chem Ind Ltd | 3,4−ジヒドロ−1,2,3−オキサチアジン−4−オン−2,2−ジオキサイド化合物又はその塩の製造法 |
-
2006
- 2006-08-03 JP JP2006212263A patent/JP2008037778A/ja active Pending
-
2007
- 2007-08-02 US US12/373,922 patent/US7662957B2/en not_active Expired - Fee Related
- 2007-08-02 WO PCT/JP2007/065138 patent/WO2008016100A1/ja not_active Ceased
- 2007-08-02 DE DE112007001772T patent/DE112007001772T5/de not_active Withdrawn
- 2007-08-02 CN CNA2007800290163A patent/CN101501010A/zh active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62129277A (ja) * | 1985-07-29 | 1987-06-11 | ヘキスト アクチェンゲゼルシャフト | 6−メチル−3、4−ジヒドロ−1、2、3−オキサチアジン−4−オン−2、2−ジオキシドの製法 |
| JPS6256481A (ja) * | 1985-09-03 | 1987-03-12 | ヘキスト アクチェンゲゼルシャフト | 6−メチル−3、4−ジヒドロ−1、2、3−オキサチアジン−4−オン−2、2−ジオキサイドの無毒性塩の製造方法 |
| JPS6256480A (ja) * | 1985-09-03 | 1987-03-12 | ヘキスト アクチェンゲゼルシャフト | 6−メチル−3、4−ジヒドロ−1、2、3−オキサチアジン−4−オン−2、2−ジオキサイドの製造方法およびその精製方法 |
| JP2003002879A (ja) * | 2001-06-22 | 2003-01-08 | Daicel Chem Ind Ltd | オキサチアジン類の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112007001772T5 (de) | 2009-06-18 |
| CN101501010A (zh) | 2009-08-05 |
| JP2008037778A (ja) | 2008-02-21 |
| US7662957B2 (en) | 2010-02-16 |
| US20090318685A1 (en) | 2009-12-24 |
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