CN1220679C - Preparation of thiol carbamate and thiocyanic ester compound - Google Patents

Preparation of thiol carbamate and thiocyanic ester compound Download PDF

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CN1220679C
CN1220679C CNB031082378A CN03108237A CN1220679C CN 1220679 C CN1220679 C CN 1220679C CN B031082378 A CNB031082378 A CN B031082378A CN 03108237 A CN03108237 A CN 03108237A CN 1220679 C CN1220679 C CN 1220679C
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salt
compound
acid
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preparation
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CN1495162A (en
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木原和明
田村五郎
中村敏行
相本德治
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Takeda Agro Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C331/00Derivatives of thiocyanic acid or of isothiocyanic acid
    • C07C331/02Thiocyanates
    • C07C331/04Thiocyanates having sulfur atoms of thiocyanate groups bound to acyclic carbon atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C333/00Derivatives of thiocarbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C381/00Compounds containing carbon and sulfur and having functional groups not covered by groups C07C301/00 - C07C337/00
    • C07C381/02Thiosulfates

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Abstract

The present invention relates to a method for producing a compound represented by the formula; wherein R1 and R2 independently represent a alky group, or a salt thereof, which comprises reacting a compound represented by the formula; where each symbol has the same meaning as defined above, or a salt thereof, with a salt of sulfurous acid under pH 4 to 11 at a temperature below 60 DEG C to provide a compound represented by the formula; where M is an alkaline or alkaline earth metal as ammonium and the other symbols have the same meaning s as defined above, or a salt thereof, and the reacting the resulting compound with prussic acid or a salt thereof. The compound (I) or a salt thereof is useful as an intermediate for synthesis of thiolcarbamate derivatives which have excellent insecticidal activities. According to the method of the present invention, compound (I) or a salt thereof can be obtained in high yield.

Description

The preparation of thiol-carbamate and sulfocyanic ester compound
The application is to be the dividing an application of Chinese patent application 99123998.9 on September 15th, 1999 applying date.
The compound or its salt of having described a kind of formula (I) expression in JP-B-42177/1976 has strong insecticidal activity,
Figure C0310823700041
R wherein 1And R 2Represent alkyl independently, or R 1And R 3Form a nitrogenous 5-or 6-unit heterocyclic radical (abbreviating hereinafter, " compound (I) " sometimes as) with adjacent nitrogen-atoms.A kind of synthetic insecticide activity thiolcarbonic acid ester derivative stronger, that formula (III) is represented or important intermediate of its salt of being used for also described in JP-B-10969/1967,
Wherein each symbol has meaning same as described above (hereinafter abbreviating " compound (III) " sometimes as).
About the preparation method of formula (I) compound or its salt, the method for corresponding dihalide and thiocyanic ester reaction, corresponding thiosulphate (hereinafter being called for short bunte salts sometimes) and the method for the method of prussiate reaction, corresponding dimercapto compound and halogen prussiate (halogen cyan) reaction and the method for corresponding stilbene-4,4'-bis-(1-azo-3, 4-dihydroxy-benzene)-2,2'-disulfonate compound and prussiate (hydrocyanide) reaction in JP-B-18012/1964, JP-B-19524/1969, JP-A-34316/1972 and JP-B-28905/1988, have been reported respectively.
A kind of formula (IV) compound or its salt has been described in JP-B-17404/1970,
R wherein 1And R 2Have meaning same as described above, M is metal or ammonium (hereinafter abbreviating " compound (IV) " sometimes as), and it has strong insecticidal activity, and is to be used for that the synthetic insecticide activity is stronger, the important intermediate of thiol-carbamate (III).
About the preparation method of formula (IV) compound or its salt, in JP-B-17404/1970, reported the method for corresponding dihalide and thiosulphate (sodium byposulfite salt) reaction.
But, according to prior art, intractable waste water, and also have the low problem of productive rate.In addition, it is useless that the filtrate (depleted) that produces in the step to thiol-carbamate (III) that fabulous insecticidal activity is arranged in preparation is carried out crystallization, so prior art is with its burning.Because above-mentioned refuse contains sulfur hydroxyamino acid ester derivative, from economize on resources angle this be a serious environmental problem.
In addition, according to the method for describing, have the problem that productive rate is lower in JP-B-18012/1964 or JP-B-17404/1970, reason is to have produced the by product that formula V is represented:
Wherein X represents group SCN or SSO 3M (wherein M represents metal or ammonium), the meaning of other symbol defines as above,
Such as S, S '-(dimethylaminomethyl) ethylene two (Sulfothiorine) and dimethylaminomethyl ethyl two (thiocyanic ester), they are respectively the isomer of above-mentioned product.
The inventor has concentrated and has studied the productive rate height, wastewater treatment is simple and the thiol-carbamate production stage that can circulate during the compound (I), (III) or (IV) or the preparation method of its salt of the refuse that produces.As a result, the inventor is surprised to find, formula (II) compound or its salt:
R wherein 1And R 2Represent alkyl independently, or R 1And R 2Form a nitrogenous 5-or 6-unit heterocyclic radical with adjacent nitrogen-atoms,
When itself and prussic acid or its reactant salt, the dithiolane (dithiolanering) of compound (II) splits, and high productivity generates compound (I) or its salt.
In addition, the inventor is surprised to find, formula (II) compound or its salt:
Figure C0310823700061
Wherein each symbol has the meaning identical with above-mentioned definition,
When itself and sulfurous acid or its reactant salt, the dithiolane of compound (II) splits, and high yield high purity ground generates compound (IV) or its salt.This compound (IV) or its salt also can with prussic acid or its reactant salt, generate compound (I) or its salt.
In addition, the inventor has also carried out concentrated research based on these knowledge, thereby has finished the present invention.
In other words, the present invention relates to:
[1] preparation method of the compound or its salt of a kind of formula (I) expression,
Figure C0310823700062
R wherein 1And R 2Represent alkyl independently, or R 1And R 2Form a nitrogenous 5-or 6-unit heterocyclic radical with adjacent nitrogen-atoms,
It comprises the compound or its salt of formula (II) expression
Figure C0310823700063
Wherein each symbol has meaning same as described above,
With prussic acid or its reactant salt,
[2] as [1] described method, wherein R 1And R 2Represent alkyl independently,
[3] as [1] described method, wherein R 1And R 2All represent methyl,
[4] preparation method of the compound or its salt of a kind of formula (III) expression,
Figure C0310823700064
R wherein 1And R 2Represent alkyl independently, or R 1And R 2Form a nitrogenous 5-or 6-unit heterocyclic radical with adjacent nitrogen-atoms,
It comprises the compound or its salt of formula (II) expression
Figure C0310823700071
Wherein each symbol has meaning same as described above,
With prussic acid or its reactant salt, generate the compound or its salt of a kind of formula (I) expression,
Wherein each symbol has meaning same as described above,
Then the compound that generates is hydrolyzed and reacts or in the presence of hydrogen halide, react with a kind of lower alcohol,
[5] preparation method of the compound or its salt of a kind of formula (IV) expression,
Figure C0310823700073
R wherein 1And R 2Represent alkyl independently, or R 1And R 2Form a nitrogenous 5-or 6-unit heterocyclic radical with adjacent nitrogen-atoms, M is metal or ammonium,
It comprises the compound or its salt of formula (II) expression
Wherein each symbol has meaning same as described above,
With sulfurous acid or its reactant salt,
[6] as [5] described method, wherein R 1And R 2Represent alkyl independently,
[7] as [5] described method, wherein R 1And R 2All represent methyl,
[8] preparation method of the compound or its salt of a kind of formula (I) expression,
Figure C0310823700081
R wherein 1And R 2Represent alkyl independently, or R 1And R 2Form a nitrogenous 5-or 6-unit heterocyclic radical with adjacent nitrogen-atoms,
It comprises the compound or its salt of formula (II) expression
The above-mentioned identical meaning of each symbol wherein,
With sulfurous acid or its reactant salt, generate the compound or its salt of a kind of formula (IV) expression,
Wherein M is metal or ammonium, and other symbol has meaning same as described above,
Then with the compound and prussic acid or its reactant salt that generate; With
[9] preparation method of the compound or its salt of a kind of formula (III) expression,
R wherein 1And R 2Represent alkyl independently, or R 1And R 2Form a nitrogenous 5-or 6-unit heterocyclic radical with adjacent nitrogen-atoms,
It comprises:
(i) Biao Shi compound or its salt formula) II)
Wherein each symbol has meaning same as described above,
With sulfurous acid or its reactant salt, generate the compound or its salt of a kind of formula (IV) expression,
Wherein M is metal or ammonium, and other symbol has meaning same as described above,
(ii) with the compound and prussic acid or its reactant salt that generate, the compound or its salt that production (I) is represented
Wherein each symbol has meaning same as described above,
With
(iii) the compound that generates is hydrolyzed and reacts or in the presence of hydrogen halide, react with a kind of lower alcohol.
R 1And R 2The alkyl of expression comprises can contain two keys or the triple-linked straight chain, side chain or cyclic aliphatic hydrocarbyl, aryl or aralkyl.Can use alkyl, thiazolinyl, alkynyl, aryl or aralkyl especially.Wherein preferred C 1-19Alkyl.
Alkyl comprises C straight chain or side chain 1-6Alkyl or C 3-14Cycloalkyl for example comprises C 1-6Alkyl or C 3-14Cycloalkyl is such as methyl, ethyl, n-propyl, sec.-propyl, normal-butyl, isobutyl-, sec-butyl, the tertiary butyl, n-pentyl, sec.-amyl sec-pentyl secondary amyl, isopentyl, neo-pentyl, cyclopropyl, cyclopentyl, n-hexyl, isohexyl or cyclohexyl.
Thiazolinyl comprises the C of straight or branched 2-6Alkenyl or C 3-14Cycloalkenyl group for example comprises C 2-6Thiazolinyl or C 3-14Cycloalkenyl group is such as allyl group, pseudoallyl, isobutenyl, pentenyl, 2-hexenyl or 2-cyclohexenyl.
Alkynyl comprises C 2-6Alkynyl is such as proyl, 2-butyne base, 3-butynyl, 3-pentynyl or 3-hexin base.
Aryl comprises C 6-14Aryl is such as phenyl, naphthyl or anthryl.
Aralkyl comprises C 7-19Aralkyl is such as phenyl-C 1-4Alkyl (for example benzyl, styroyl, hydrocinnamyl etc.), diphenyl-methyl or trityl.
In formula
Figure C0310823700101
In the group of expression, R 1And R 2The nitrogenous 5-or the 6-unit heterocyclic radical that form with adjacent nitrogen-atoms comprise that pyrrolidino, piperidino-(1-position only), Piperazino, morpholino base, thiomorpholine are for base or thiazolidyl.
R 1And R 2The low alkyl group that 1-4 carbon atom arranged of preferred straight or branched.Wherein, special preferable methyl.
The salt of compound (I) comprises the salt that forms with the mineral acid of all example hydrochloric acids, sulfuric acid and phosphoric acid or the salt that forms with organic acid such as Phenylsulfonic acid, tosic acid and oxalic acid.
Compound (I) or its salt can pass through compound (II) or its salt and prussic acid or its salt and give birth to weakly alkaline, particularly prepared in reaction under the condition of pH5-9, preferred pH7-9 at weak acid.
The prussic acid that can use in the present invention or its salt comprise the solid alkali metal salt of prussic acid, such as the sodium cyanide and the potassium cyanide that can obtain from market, or use hydrocyanic acid gas, if possible, can use ammonium salt or alkaline earth salt (for example calcium salt, magnesium salts etc.), heavy metallic salt (for example iron, copper, zinc etc.).Sodium cyanide (sodium cyanide) and potassium cyanide (potassium cyanide) use as preferred prussic acid or its salt.
The salt of compound (II) comprises the identical salt of salt with above-claimed cpd (I).
Because this reaction is carried out quantitatively at short notice, for 1 mole compound (II), 2 moles of hydrogen cyanic acid or its salt are competent on stoichiometry.If desired, can use excessive prussic acid or its salt, but from economize on resources and processing reaction after the angle of the refuse that generates consider that this is undesirable.
As the solvent that in reaction, uses, preferably use soluble compound (II) or its salt and one of prussic acid or its salt or both solvents, even but solvent can not dissolve both well, and this reaction also can fully be carried out.But, consider that it is undesirable that the character of reaction reagent, compound (I) and compound (II) or its salt, pH are tended to solvent extremely acid or extremely alkalescence.Therefore, if a kind solvent is a neutral almost, then to reaction not any solvent of influence can use.This kind solvent comprises rudimentary aliphatic alcohol, such as methyl alcohol, ethanol, Virahol etc.; Lower aliphatic ketone is such as acetone, methyl ethyl ketone, methyl iso-butyl ketone (MIBK) etc.; Rudimentary chain or cyclic aliphatic ethers are such as ether, tetrahydrofuran (THF), dioxane etc.; The lower alphatic carboxylic acid derivative is such as ethyl acetate, acetonitrile, dimethyl formamide etc.; Rudimentary chain or cyclic aliphatic sulphur compound are such as dithiocarbonic anhydride, dimethyl sulfoxide (DMSO), tetramethylene sulfone etc.If desired, can make water or lower aliphatic halohydrocarbon, such as methylene dichloride, chloroform or tetracol phenixin; Or aromatic hydrocarbons, such as benzene,toluene,xylene or chlorobenzene.These solvents can use separately or two or more (preferably being no more than wherein three kinds) in them be mixed use in the proper ratio.In addition, when reaction mixture is not equal phase time, for example under the situation of water and aromatic hydrocarbons or aliphatic halogenated hydrocarbons, reaction system becomes two-phase, but in this case, preferably adds a small amount of phase-transfer catalyst, such as quaternary ammonium salt, sulfonium salt or phosphonium salt.Two kinds of solvents of preferred use are such as water and a kind of not miscible with water solvent (for example toluene or benzene), because carry out lock out operation easily.
In the method for the invention, compound (II) or its salt are contacted with prussic acid or its salt in the solvent that is fit to, begin reaction immediately.But reaction heat release ground carries out.To thermally labile, therefore, it is ideal that temperature of reaction remains below 40 ℃ to the compound (I) that generates, and is generally room temperature or is not higher than room temperature under the form of free alkali.If desired, cooling reactor from the outside.The preferred 0-20 of temperature of reaction ℃.
Also have, the reaction in the inventive method is gently carried out under these conditions, finishes to a few hours in common 1 hour, but according to circumstances can finish at several minutes or tens of minutes.
Because compound (I) or its salt lack the stability to alkali, the reaction times unnecessarily prolong and the situation of the compound (I) that generates and excessive cryanide ion Long contact time under, may cause variable color or reduction productive rate.Therefore, cooling immediately after finishing reaction is ideal through extraction with the reallocation of suitable solvents (for example toluene, benzene etc.) is separated the material of needs from reaction system.
By can easily determine finishing of reaction such as thin-layer chromatography (TLC), high performance liquid chromatography analyses such as (HPLC).
Compound (I) or its salt can be converted into the compound or its salt (hereinafter abbreviating compound (III) sometimes as) of formula (III) expression of fabulous insecticidal activity according to JP-B-19520/1970 or the described method of JP-B-10969/1967
Figure C0310823700111
Wherein each symbol has meaning same as described above.
In other words, compound (I) or its salt are hydrolyzed reaction or compound (I) or its salt reacted with lower alcohol in the presence of following hydrogen halide can prepare compound (III) or its salt.
The starting material compound of this reaction (I) or its salt just can use without isolated or purified after the preparation that aforesaid method according to the present invention carries out.Can certainly use isolated or purified compound (I) or its salt.
[hydrolysis reaction]
Compound (I) or the hydrolysis under acidic conditions of its salt.The acid of using comprises mineral acid, all example hydrochloric acids, sulfuric acid, phosphoric acid, Hydrogen bromide etc.Preferred especially hydrochloric acid and sulfuric acid.The preferred 5-98% of concentration of acid.Preferred 5% saturated hydrochloric acid or 10-60% sulfuric acid.The preferred 0-100 of temperature of reaction ℃, preferred 20-80 ℃ especially.
This reaction can be carried out in acidic aqueous solution, if desired, can be added in about describe and organic solvent that do not influence reaction the reaction for preparing compound (I) or its salt from compound (II) or its salt.When using not, can add above-mentioned phase-transfer catalyst with the miscible organic solvent of water.
[with the reaction of hydrogen halide]
At hydrogen halide (HX)-such as hydrogen chloride gas and bromize hydrogen gas---in the presence of, compound (I) or its salt and lower alcohol (R ' OH; R ' represents rudimentary C 1-4Alkyl is such as methyl, ethyl etc.) reaction, generate intermediate (IX) or its salt, do not separate then, heated mixt under decompression or normal pressure, or mixture placed room temperature, the cancellation alkyl halide (R ' X), preparation mixture (III) or its salt.
Figure C0310823700121
The reaction of preparation intermediate (IX) can be carried out preferred 0-40 ℃ under the temperature between the boiling point of the lower alcohol that uses at 0 ℃.This reaction can relatively promptly be carried out, and to continue to finish in 2-12 hour be ideal but will react.For compound (I), the amount of hydrogen halide is preferably greater than 10 equivalents greater than 3 equivalents.
Lower alcohol comprises methyl alcohol, ethanol etc.As hydrogen halide, preferred especially hydrogen chloride gas.
The salt of compound (III) comprises the identical salt of salt with above-claimed cpd (I).
Compound (III) or its salt can separate and purifying with known method itself, such as extraction, pH regulator, reallocation, concentrate, concentrating under reduced pressure, crystallization and recrystallization etc.
For example, after finishing reaction, when reaction mixture is the aqueous solution, extract and need not other operation, when reaction mixture contains can be with the mixed uniformly organic solvent of water the time, behind the concentrating under reduced pressure, add almost water-fastly, extract then such as lower aliphatic halohydrocarbon such as methylene dichloride or chloroforms or such as aromatic hydrocarbons such as benzene,toluene,xylene or chlorobenzenes.Concentrate the organic layer that obtains like this, obtain the crude product crystal of compound (III).By crystallization in ether, toluene etc. after adding mineral acid such as all example hydrochloric acids, sulfuric acid, phosphoric acid, Hydrogen bromide or adding organic acids such as Phenylsulfonic acid, tosic acid, oxalic acid, can obtain isolated compound (III) with the form of salt.
Can prepare compound (II) or its salt that uses in the method for the present invention according to known method itself, for example use Chemistry at Agricultural and Biological, 34,935-940, the method described in 1974.
Above-claimed cpd (I) or its salt can use compound (II) or its salt to obtain according to following another kind of method.
In other words, by compound (II) or its salt and sulfurous acid or its reactant salt, the compound or its salt of production (IV) expression,
Wherein M is metal or ammonium, and other symbol has meaning same as described above,
Make compound and prussic acid or its reactant salt of generation then, can prepare compound (I) or its salt.
M is that metal is (for example such as basic metal such as sodium, potassium; Such as alkaline-earth metal such as calcium, magnesium) or ammonium group.Wherein, preferred sodium or potassium.
When pH is about 4 the time, compound (IV) can form the inner salt of formula (VI) expression:
Figure C0310823700132
Wherein each symbol has meaning same as described above.This class inner salt is also included within the scope of compound (IV).This inner salt shows low water solubility, therefore can be used as crystal separation.In this case, it often has crystal water.
Compound (IV) or its salt can pass through compound (II) or its salt and sulfurous acid or its salt in slightly acidic to weakly alkaline, prepared in reaction under the condition of pH4-11, preferred especially pH4-8 preferably.
The salt of compound (IV) comprises the identical salt of salt with above-claimed cpd (I).
As sulfurous acid or its salt, comprise an alkali metal salt of sulfurous acid, such as S-WAT, potassium sulfite etc.; Ammonium sulphite; Hydrosulphite (with alkali-metal salt) is such as sodium bisulfite, Potassium hydrogen sulfite etc.; The sulphite of alkaline-earth metal is such as calcium sulfite, magnesium sulfite etc.; Sulphurous acid gas etc.
Wherein the solid alkali metal salt of preferred sulfurous acid can obtain from market, such as S-WAT or potassium sulfite.
Because this reaction is carried out quantitatively at short notice, for 1 mole compound (II), 2 moles of sulfurous acid or its salt are competent on stoichiometry.If desired, can allow excessive about 2-4 mole.
Solvent as using in the reaction preferably uses soluble compound (II) or its salt and one of sulfurous acid or its salt or both solvents, even but solvent can not dissolve both well, and this reaction also can fully be carried out.But, consider that it is undesirable that the character of reaction reagent, compound (IV) and compound (II), pH are tended to solvent extremely acid or extremely alkalescence.Therefore, if a kind solvent is a neutral almost, then to reaction not any solvent of influence can use.This kind solvent comprises the water and the another kind of solvent of dissolving sulfurous acid or its salt needs, comprises for example rudimentary aliphatic alcohol, such as methyl alcohol, ethanol, Virahol etc.; Lower aliphatic ketone is such as acetone, methyl ethyl ketone, methyl iso-butyl ketone (MIBK) etc.; Rudimentary chain or cyclic aliphatic ethers are such as ether, tetrahydrofuran (THF), dioxane etc.; The lower alphatic carboxylic acid derivative is such as ethyl acetate, acetonitrile, dimethyl formamide etc.; Rudimentary chain or cyclic aliphatic sulphur compound are such as dithiocarbonic anhydride, dimethyl sulfoxide (DMSO), tetramethylene sulfone etc.; The lower aliphatic halohydrocarbon is such as methylene dichloride, chloroform or tetracol phenixin etc.; Or aromatic hydrocarbons, such as benzene,toluene,xylene or chlorobenzene etc.These solvents can use separately or in the proper ratio two or more (preferably being no more than wherein three kinds) in them be mixed use with water.
In the method for the invention, compound (II) or its salt are contacted with sulfurous acid or its salt in the solvent that is fit to, begin reaction immediately.It is ideal that temperature of reaction remains below 60 ℃, is generally 50 ℃ or be not higher than 50 ℃.The preferred 20-50 of temperature of reaction ℃.
Also have, the reaction in the inventive method is gently carried out under these conditions, finishes during a few hours at 30 minutes usually.
By can easily determine finishing of reaction as thin-layer chromatography (TLC), high performance liquid chromatography analyses such as (HPLC).
Compound (IV) or its salt can be converted into compound (I) or its salt of fabulous insecticidal activity according to the described method of JP-B-19524/1969.
In addition, compound (IV) or its salt can separate and purifying with known method itself, such as pH regulator, ion-exchange chromatography, concentrate, concentrating under reduced pressure, crystallization and recrystallization etc.
For example, when reaction mixture is the aqueous solution,, need not other operation with the mineral acid of equivalent or excessive a little all example hydrochloric acids, sulfuric acid, phosphoric acid or such as the organic acid neutralization of Phenylsulfonic acid, tosic acid, oxalic acid; When reaction mixture contains can be with the mixed uniformly organic solvent of water the time, after concentrating under reduced pressure was removed organic solvent, the water layer of gained neutralized with aforesaid method, and isolated compound (VI) inner salt is highly purified crystal.
Compound (I) or its salt can be used compound (IV) or its salt and prussic acid or the preparation of its reactant salt.This reaction is available and above-mentioned to prepare compound (I) or its salt from compound (II) or its salt reacting phase with condition carry out.The starting material compound of this reaction (IV) or its salt just can use without isolated or purified after method for preparing according to the present invention.Can certainly use isolated or purified compound (IV) or its salt.
The compound that obtains like this (I) or its salt can change into compound (III) with method same as described above.
Embodiment
The following example is used to describe in detail the present invention, should not think limiting the scope of the invention.
Embodiment 1
Preparation 2-(dimethylamino) trimethylene two (thiocyanic ester)
2.49g (98.3%, 0.05 mole of purity) sodium cyanide (sodium cyanide) is dissolved in 22.06g water, mixture is cooled to 5 ℃ then.In mixture, add 25ml toluene, Dropwise 5 .04g (0.025 mole) 4-dimethylamino-1 in about 1 hour time then, 2-dithiolane-1-oxide hydrochloride is dissolved in the solution that 20.16g water forms.After adding, under identical temperature, stirred the mixture 1 hour, be divided into toluene layer and water layer.Analyze this toluene layer with HPLC, obtain 2.35g 2-(dimethylamino) trimethylene two (thiocyanic ester) (productive rate: 46.7%) and 0.82g 4-dimethylamino-1,2-dithiolane (productive rate: 21.996).
Embodiment 2
Preparation 2-(dimethylamino) trimethylene two (thiocyanic ester)
(5.04g 0.025 mole) 4-dimethylamino-1,2-dithiolane-1-oxide hydrochloride is dissolved in 35g water.In mixture, add 25ml toluene, mixture is cooled to 5 ℃ then.This moment, pH was 2.6.
2.49g (purity: 98.3%, 0.05 mole) sodium cyanide is dissolved in 6.86g water in addition.This solution was added drop-wise in the mixture of above-mentioned acquisition in about 1 hour time.During this period, the hydrochloric acid with 5N is controlled at 8 with pH.After adding, under identical temperature, stirred the mixture about 1 hour.With the NaOH of 4N with pH regulator to 10 after, mixture is divided into toluene layer and water layer.Analyze this toluene layer with HPLC, obtain 4.91g 2-(dimethylamino) trimethylene two (thiocyanic ester) (productive rate: 97.6%).Under reduced pressure toluene layer is concentrated, the residue that obtains recrystallization from methyl alcohol obtains crystal 2-(dimethylamino) trimethylene two (thiocyanic ester) (fusing point: 53-54 ℃).
Embodiment 3
Preparation 2-(dimethylamino) trimethylene two (thiocyanic ester)
(13.19g 0.071 mole) 1,3-two (formamyl sulfenyl)-2-(N, N-dimethylamino) propane hydrochloride salt is dissolved in 250ml water.In mixture, add 100ml toluene, then because reaction is heat release, so at the sodium hydroxide that is cooled to be lower than dropping 28% under 45 ℃ of conditions up to pH=9.After pH regulator to 9, at the hydrogen peroxide that in 1 hour, drips 7.59g (0.078 mole) 35% under the identical temperature.During this period, with 28% sodium hydroxide pH is controlled at 9.After adding, stirred reaction mixture is about 1 hour under identical temperature, and mixture is divided into toluene layer and water layer then.Add the hydrochloric acid of 15ml water and 17.1g (0.1645 mole) 35% in toluene layer, mixture is divided into toluene layer and water layer then.The result who analyzes water layer with HPLC has obtained 12.5g (0.0675 mole) 4-(dimethylamino)-1,2-dithiolane hydrochloride.In remaining on this aqueous solution of 10 ℃, drip the superoxol of 6.56g (0.0675 mole) 35% under agitation during about 1 hour.After adding, at room temperature stirred the mixture about 1 hour.Result with the HPLC analyze reaction mixture has obtained 12.93g (0.0641 mole) 4-(dimethylamino)-1,2-dithiolane-1-oxide hydrochloride.Add 65ml toluene in this mixture, mixture is cooled to 5 ℃, then during about 1 hour in the solution that in 17.6g water, prepares of dropping 6.38g (98.3%, 0.13 mole of purity) sodium cyanide (sodium cyanide).During this period, with the hydrochloric acid of 5N pH is controlled at and is not more than 7.After adding, stirred the mixture under identical temperature about 1 hour, the sodium hydroxide of using 4N is with pH regulator to 10, and mixture is divided into toluene layer and water layer.Analyze this toluene layer with HPLC, obtain 12.00g 2-(dimethylamino) trimethylene two (thiocyanic ester) (productive rate: 84.096,, 3-two (formamyl sulfenyl)-2-(N, N-dimethylamino) propane hydrochloride salt) based on 1.
Embodiment 4
Preparation S, S '-(2-dimethylamino) trimethylene two (Sulfothiorine)
7.96g (95%, 0.06 mole of purity) S-WAT is dissolved in 24.90g water.In this mixture, add 80ml toluene, then with concentrated hydrochloric acid with pH regulator to 7.0.After solution was heated to 30 ℃, Dropwise 5 .04g in about 1.5 hours (0.025 mole) 4-dimethylamino-1,2-dithiolane-1-oxide hydrochloride were dissolved in the solution that 20.16g water forms.Between charge period, pH is remained on 7 with concentrated hydrochloric acid.After stirring the mixture under the identical temperature about 1 hour, the sodium hydroxide with 28% is with pH regulator to 9.0, and separating mixture obtains the aqueous solution of title compound then.Analyze water layer with HPLC, obtain 7.82gS, S '-(2-dimethylamino) trimethylene two (Sulfothiorine) (productive rate: 88.096).
Embodiment 5
Preparation S, S '-(2-dimethylamino) trimethylene two (Sulfothiorine)
13.27g (95%, 0.10 mole of purity) S-WAT is dissolved in 44.41g water.In this mixture, add 80ml toluene, then with concentrated hydrochloric acid with pH regulator to 7.0.After solution was heated to 30 ℃, Dropwise 5 .04g in about 1.5 hours (0.025 mole) 4-dimethylamino-1,2-dithiolane-1-oxide hydrochloride were dissolved in the solution that 20.16g water forms.Between charge period, pH is remained on 7 with concentrated hydrochloric acid.After identical temperature stirred the mixture about 1 hour, the sodium hydroxide with 28% was with pH regulator to 9.0, and separating mixture obtains the aqueous solution of title compound.Analyze water layer with HPLC, obtain 8.71g S, S '-(2-dimethylamino) trimethylene two (Sulfothiorine) (productive rate: 98.096).
Embodiment 6
Preparation S, S '-(2-dimethylamino) trimethylene two (Sulfothiorine)
(13.19g 0.071 mole) 1,3-two (formamyl sulfenyl)-2-(N, N-dimethylamino) propane hydrochloride salt is dissolved in 250ml water.In mixture, add 100ml toluene, then because reaction is heat release, so at the sodium hydroxide that is cooled to be lower than dropping 28% under 45 ℃ of conditions up to pH=9.After pH regulator to 9, at the hydrogen peroxide that in 1 hour, drips 7.59g (0.078 mole) 35% under the identical temperature.During this period, with 28% sodium hydroxide pH is controlled at 9.After adding, stirred the mixture under identical temperature about 1 hour, mixture is divided into toluene layer and water layer then.Add the hydrochloric acid of 15ml water and 17.1g (0.1645 mole) 35% in toluene layer, mixture is divided into toluene layer and water layer then.The result who analyzes water layer with HPLC has obtained 12.5g (0.0675 mole) 4-(dimethylamino)-1,2-dithiolane hydrochloride.In remaining on this aqueous solution of 10 ℃, drip the superoxol of 6.56g (0.0675 mole) 35% under agitation during about 1 hour.After adding, at the stirring at room mixture about 1 hour.Result with the HPLC analyze reaction mixture has obtained 12.93g (0.0641 mole) 4-(dimethylamino)-1,2-dithiolane-1-oxide hydrochloride.
In addition, 34.02g (95%, 0.256 mole of purity) S-WAT is dissolved in 113.1g water.In this mixture, add 205ml toluene, then with concentrated hydrochloric acid with pH regulator to 7.0.After drips of solution is added to 30 ℃, in about 1.5 hours, drip the 4-dimethylamino-1 of the above-mentioned preparation of all amounts (12.93g, 0.0641 mole), the 2-dithiolane-1-oxide hydrochloride aqueous solution.Between charge period, pH is remained on 7 with concentrated hydrochloric acid.After stirring the mixture under the identical temperature about 1 hour, the sodium hydroxide with 28% is with pH regulator to 9.0, and separating mixture obtains the aqueous solution of title compound.Analyze this water layer with HPLC, obtain 21.64gS, S '-(2-dimethylamino) trimethylene two (Sulfothiorine) (productive rate: 85.7%, based on 1,3-two (formamyl sulfenyl)-2-(N, N-dimethylamino) propane hydrochloride salt).
Embodiment 7
Preparation 1,3-two (formamyl sulfenyl)-2-(N, N-dimethylamino) propane hydrochloride salt
Figure C0310823700181
According to at the identical reaction conditions described in the embodiment 2, by 10.09g (0.05 mole) 4-dimethylamino-1, the preparation of 2-dithiolane-1-oxide hydrochloride contains the toluene solution of 2-(dimethylamino) trimethylene two (thiocyanic ester).In concentrated resistates that obtains of this toluene solution and 30ml methanol mixture, fed hydrogen chloride gas 2 hours.Reaction mixture under reduced pressure concentrates, and removes methylene dichloride and methyl alcohol.The resistates recrystallization obtains 12.18g (89%) 1,3-two (formamyl sulfenyl)-2-(N, N-dimethylamino) propane hydrochloride salt.
Embodiment 8
Preparation 1,3-two (formamyl sulfenyl)-2-(N, N-dimethylamino) propane
To according to the mixture of 20.1g (0.1 mole) 2-(dimethylamino) trimethylene two (thiocyanic ester) that obtain at the identical reaction conditions described in the embodiment 2 and 4ml water in feeding hydrogen chloride gas 8 hours.Reaction mixture is dissolved in 35ml water.This solution neutralizes with sodium bicarbonate.After ice-cooled, filter the crystal that collecting precipitation goes out.Dried crystals, recrystallization in ethanol obtains 12.1g (51%) 1,3-two (formamyl sulfenyl)-2-(N, N-dimethylamino) propane.
Embodiment 9
Preparation 1,3-two (formamyl sulfenyl)-2-(N, N-dimethylamino) propane hydrochloride salt
According to embodiment 5 same procedure, by 10.09g (0.05 mole) 4-dimethylamino-1, the preparation of 2-dithiolane-1-oxide hydrochloride contains S, S '-(2-dimethylamino) trimethylene two (Sulfothiorine) aqueous solution.
4.90g (0.10 mole) sodium cyanide portions joins in this aqueous solution, mixture stirred 30 minutes down ice-cooled then.Filter the crystal that collecting precipitation goes out, obtain 8.56g 2-(dimethylamino) trimethylene two (thiocyanic ester) (productive rate: 85%,, 2-dithiolane-1-oxide hydrochloride) based on 4-dimethylamino-1.
In compound that obtains like this and 30ml methanol mixture, fed hydrogen chloride gas 2 hours.Reaction mixture under reduced pressure concentrates, and removes methylene dichloride and methyl alcohol.Resistates is recrystallization in methyl alcohol, obtains 11.46gl, 3-two (formamyl sulfenyl)-2-(N, N-dimethylamino) propane hydrochloride salt (productive rate: 83%, based on 4-dimethylamino-1,2-dithiolane-1-oxide hydrochloride).
The method according to this invention has generated the water-soluble inorganic salt as by product from compound (II) preparation compound (I), thus the product of wishing, and oil loving compound (I) can easily separate after reaction is finished.For example, when making water and can be from water as reaction solvent under the situation of isolating a kind of organic solvent,, can collect sulfocyanic ester compound quantitatively as high-purity product by being divided into the water layer that contains inorganic salt and containing the organic layer of wishing product.Therefore, can easily handle the refuse that the inventive method produces, be special useful in addition from antipollution angle.
This compounds (I) or its salt also can be by compound (IV) or the preparations of its salt.The method of compound produced according to the present invention (I) and compound (IV) does not generate the isomer such as compound (V) as by product, so compound (I) and compound (IV) can high yield obtain.
In addition; the sulfur hydroxyamino acid ester derivative that strong insecticidal activity is arranged that the compound (I) that obtains according to the inventive method or its salt are synthetic compound (III) expression (for example; 1,3-two (formamyl sulfenyl)-2-(N, N-dimethylamino) propane) useful as intermediates.
In addition, compound (IV) but or the expression of its salt drawing-in system (VIII) as the thiosulfonic acid ester derivative of strong insecticidal activity is arranged as described in the JP-B-13755/1971:
R wherein 1And R 2Have meaning same as described above, or R 3It is lower alkoxy; Can have and contain the low alkyl group of Sauerstoffatom as heteroatomic saturated heterocyclyl; The 10-camphyl; Can have alkyl, lower alkoxy, lower alkylthio, halogen or amido as substituent phenyl; Or naphthyl.
Therefore, compound (IV) or its salt can be used as the compound that intermediate is used to prepare fabulous insecticidal activity.Above-claimed cpd (VIII) can be according to the described method preparation of JP-B-32350/1988.
In addition, use the following step, the thiocarbamate acid ester derivant crystalline filtrate of containing that generates in its preparation process can be introduced in compound (II) or its salt.Filtrate hydrolysis under alkaline condition, oxidation then obtains compound (VII) or its salt (at this, salt comprises the identical salt of salt with above-claimed cpd (I)) that formula (VII) is represented:
Wherein each symbol has meaning same as described above,
The compound that oxidation generates under acidic conditions obtains compound (II) or its salt then.In addition, the method according to this invention can obtain compound (I) or its salt from compound (II) or its salt, and therefore, it can be used for the synthetic of compound (II) or its salt as the intermediate circulation.From the angle that economizes on resources, it is extremely useful that these methods are considered to, because can intermediate be used further to agrochemicals by collecting from refuse.

Claims (5)

1. the preparation method of the compound or its salt represented of a following formula,
Figure C031082370002C1
R wherein 1And R 2Represent alkyl independently, or R 1And R 2Form a nitrogenous 5-or 6-unit heterocyclic radical with adjacent nitrogen-atoms, M is metal or ammonium, and it comprises the compound or its salt that following formula is represented
Wherein each symbol has meaning same as described above, with sulfurous acid or its reactant salt.
2. the method for claim 1, wherein R 1And R 2Represent alkyl independently.
3. the method for claim 1, wherein R 1And R 2All represent methyl.
4. the preparation method of the compound or its salt represented of a following formula,
Figure C031082370002C3
R wherein 1And R 2Represent alkyl independently, or R 1And R 2Form a nitrogenous 5-or 6-unit heterocyclic radical with adjacent nitrogen-atoms, it comprises the compound or its salt that following formula is represented
Wherein each symbol has meaning same as described above, with sulfurous acid or its reactant salt, generates the compound or its salt that a kind of following formula is represented,
Figure C031082370002C5
Wherein M is metal or ammonium, and other symbol has meaning same as described above, then with the compound and prussic acid or its reactant salt that generate.
5. the preparation method of the compound or its salt represented of a following formula,
Figure C031082370003C1
R wherein 1And R 2Represent alkyl independently, or R 1And R 2Form a nitrogenous 5-or 6-unit heterocyclic radical with adjacent nitrogen-atoms, it comprises:
(i) compound or its salt that following formula is represented
Wherein each symbol has meaning same as described above, with sulfurous acid or its reactant salt, generates the compound or its salt that a kind of following formula is represented,
Wherein M is metal or ammonium, and other symbol has meaning same as described above,
(ii), generate the compound or its salt that following formula is represented with the compound and prussic acid or its reactant salt that generate
Figure C031082370003C4
Wherein each symbol have meaning same as described above and
(iii) the compound that generates is hydrolyzed and reacts or in the presence of hydrogen halide, react with lower alcohol.
CNB031082378A 1998-09-18 1999-09-15 Preparation of thiol carbamate and thiocyanic ester compound Expired - Lifetime CN1220679C (en)

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JP265283/1998 1998-09-18
JP26528398A JP4078439B2 (en) 1998-09-18 1998-09-18 Method for producing thiocyanate compound
JP26528998A JP4078440B2 (en) 1998-09-18 1998-09-18 Production method of organic thiosulfate
JP265289/1998 1998-09-18

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