WO2012159390A1 - 2,3-二甲基-2,3-二硝基丁烷的制备方法 - Google Patents
2,3-二甲基-2,3-二硝基丁烷的制备方法 Download PDFInfo
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- WO2012159390A1 WO2012159390A1 PCT/CN2011/079347 CN2011079347W WO2012159390A1 WO 2012159390 A1 WO2012159390 A1 WO 2012159390A1 CN 2011079347 W CN2011079347 W CN 2011079347W WO 2012159390 A1 WO2012159390 A1 WO 2012159390A1
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- acetone
- hydrogen peroxide
- catalyst
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- ammonia
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
- C07C201/06—Preparation of nitro compounds
- C07C201/14—Preparation of nitro compounds by formation of nitro groups together with reactions not involving the formation of nitro groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
- C07C201/06—Preparation of nitro compounds
Definitions
- the present invention relates to a process for the preparation of 2,3-dimethyl-2,3-dinitrobutanthene.
- DMNB 2,3-Dimethyl-2,3-dinitrobutane
- IAO International Civil Aviation Organization
- DMNB is one of the key raw materials for the synthesis of 2-substituted-1,3-dioxo-4,4,5,5-tetramethylimidazoline species, which have specific capture properties for NO in medicine.
- DMNB is also one of the important raw materials for the synthesis of molecular magnets. Therefore, it is of great significance to develop an efficient, low-cost, safe and green DMNB synthesis process.
- X is Cl, Br or I
- the 2-nitropropionate sodium salt of the reactant is firstly reacted with sodium metal and absolute ethanol, and then reacted with 2-nitropropionamidine; 2-halo-2-nitropropionamidine can be passed through 2-nitropropionamidine Obtained by adding halogen to the sodium hydroxide solution.
- the halogens are Cl, Br and I, respectively, the conversion of the synthesis reaction is only 9%, 37% and 43%, respectively; and it is necessary to use highly toxic 2-nitropropionamidine.
- the object of the present invention is to provide a novel process for the preparation of 2,3-dimethyl- 2,3-dinitrobutyrene in order to overcome the disadvantages of the prior art methods for synthesizing DMNB which require the use of hazardous chemicals.
- the invention provides a preparation method of 2,3-dimethyl-2,3-dinitrobutane, which comprises the following steps:
- the titanium silicon molecular sieve catalyst is contacted with acetone, hydrogen peroxide and ammonia for the purpose of reducing the catalytic activity of the titanium silicon molecular sieve catalyst in the ketone ammoximation reaction system; Moreover, the inventors of the present invention have unexpectedly found that after the catalytic activity of the titanium-silicon molecular sieve catalyst in the ketone ammoximation reaction system is reduced to a certain extent, the obtained modified titanium-silicon molecular sieve catalyst exhibits a comparison in the step (2). High catalytic activity.
- the process of step (1) reduces the catalytic activity of the titanium silicalite catalyst in the keto amidine deuteration reaction to less than about 60%, that is, the modified titanium silicalite catalyst is used to prepare a ketone of acetone oxime, for example, from acetone.
- the ammoximation reaction in the case where the molar ratio of acetone to hydrogen peroxide is about 1:1, the conversion of acetone is lowered to about 60% or less, preferably 40 to 50%.
- the titanium silicalite catalyst is repeatedly subjected to multiple contact reactions with acetone, hydrogen peroxide and ammonia, or a continuous stream of acetone, hydrogen peroxide and ammonia is reacted with the titanium silicalite catalyst.
- Long-term contact reaction to reduce titanium-silicon molecular sieve catalyst in ketone ammonia The catalytic activity in the deuteration reaction system is such that the titanium-silicon molecular sieve catalyst is catalyzed in the reaction process for preparing 2,3-dimethyl-2,3-dinitrobutane from the contact reaction of acetone oxime and hydrogen peroxide. active.
- the titanium silicon molecular sieve catalyst is repeatedly subjected to a plurality of contact reactions with acetone, hydrogen peroxide and ammonia: a titanium silicon molecular sieve catalyst, acetone, ammonia and hydrogen peroxide are mixed and contacted for 0.1 to 1 hour, A solid precipitate is separated from the reaction product, and then the solid precipitate is used in place of the titanium silicalite catalyst in a mixed contact with acetone, ammonia and hydrogen peroxide, and is repeated 6 to 10 times.
- the weight ratio of the titanium silicalite catalyst to acetone is preferably 1: 5-20, more preferably 1: 8-15; acetone, ammonia and hydrogen peroxide
- the molar ratio is preferably 1: 1-5: 0.5-2, more preferably 1: 1.5-3.5: 0.8-1.5.
- the titanium silicon molecular sieve after the reaction with acetone, ammonia and hydrogen peroxide is repeated.
- the weight ratio of titanium silicalite to acetone after contact with acetone, ammonia and hydrogen peroxide may be 1: 5-20, preferably 1: 8-15.
- the molar ratio of acetone, ammonia and hydrogen peroxide may be 1:1-3:0.5-2, preferably 1:1.5-2.5:0.8-1.5.
- the conditions during the repeated contact reaction and the amount of the raw materials may be the same or different.
- the titanium silicalite catalyst may be a titanium silicalite catalyst conventionally used in the art.
- the titanium silicalite catalyst is preferably a titanium silicalite catalyst having a hollow structure.
- the hollow portion of the hollow structure of the titanium silicon molecular sieve has a radial length of 5 to 300 nm, and the titanium silicon molecular sieve is at 25 ° C, P/P.
- the titanium silicalite catalyst having a hollow structure is commercially available, and for example, may be a commercially available TS-1 molecular sieve catalyst. It can also be prepared according to a conventional method, and its preparation method can be referred to CN1301599A, in particular, Examples 1-11 therein.
- the contact reaction of acetone oxime and hydrogen peroxide in the step (2-1), in the presence of the modified titanium silicon molecular sieve catalyst and water, the contact reaction of acetone oxime and hydrogen peroxide can be mainly represented by the following formula (I).
- the conditions of the contact reaction preferably include a pH of 9 to 10, a reaction temperature of 80 to 90 ° C, and a reaction time of 0.5 to 2 hours.
- the weight ratio of the modified titanium-silicon molecular sieve catalyst to the amount of acetone ruthenium may be 5-30:100, preferably 10-15:100; the amount of water and acetone oxime The weight ratio of the amount is preferably 1-10:1, preferably 2-4:1; the molar ratio of acetone oxime to hydrogen peroxide is preferably 1:1-3, preferably 1:2-2.5
- the water in the step (2-1) may be introduced with the addition of hydrogen peroxide, or a part of the water may be separately added, and another portion of the water may be introduced along with the hydrogen peroxide.
- the pH of the reaction system can be adjusted by adding an alkali solution.
- the alkali solution may be an aqueous solution of various bases conventionally used in the art, and may be, for example, a sodium hydroxide solution, ammonia water or the like.
- the contact reaction of acetone, ammonia and hydrogen peroxide can be mainly represented by the following formula (II).
- the weight ratio of the modified titanium silicalite catalyst to the amount of acetone may be 5-30:100, preferably 10-15:100; the amount of water and the amount of acetone
- the weight ratio is preferably 1-5:1, preferably 2-4:1;
- the molar ratio of acetone to hydrogen peroxide is preferably 1:3-8, preferably 1:4-6.
- the water in the step (2-2) may be introduced with the addition of hydrogen peroxide and ammonia, or a part of the water may be separately added, and another portion of the water may be introduced along with the hydrogen peroxide and the ammonia water.
- the amount of ammonia added by the ammonia water is mainly used to adjust the pH of the reaction system to 8-10, preferably 9-10.
- the ammonia in the step (1) and the step (2-2) is usually added in the form of ammonia.
- the concentration of the aqueous ammonia may be 20 to 50% by weight.
- the hydrogen peroxide in the step (1), the step (2-1) and the step (2-2) is usually added in the form of hydrogen peroxide.
- the hydrogen peroxide concentration may be from 28 to 50% by weight, preferably from 28 to 30% by weight.
- the contact reaction of the titanium silicon molecular sieve catalyst, acetone, hydrogen peroxide and ammonia belongs to a conventional ketoximinoation reaction, and the reaction mechanism can be represented by the following formula (III) .
- the acetone oxime is separated from the product of the contact reaction, and the separated acetone oxime is used as at least a part of the acetone oxime raw material of the step (2-1).
- the operation of separating the product of the contact reaction of the step (1) may include: performing solid-liquid separation (such as centrifugation, filtration, etc.) on the product of the contact reaction, repeating the contact reaction of the separated solid precipitate with acetone, ammonia, and hydrogen peroxide, or precipitating the separated solid.
- solid-liquid separation such as centrifugation, filtration, etc.
- the material is directly used as the modified titanium silicon molecular sieve catalyst in the step (2-1) and/or the step (2-2), and the separated liquid is injected into the rectification column (the number of theoretical plates can be 20-80) , preferably 30-60), by controlling the bottom temperature (preferably 80-130 ° C, more preferably 100-120 ° C) and reflux ratio (preferably not less than 2: 1, more preferably 5-10: 1), acetone oxime is collected from the bottom liquid.
- the bottom temperature preferably 80-130 ° C, more preferably 100-120 ° C
- reflux ratio preferably not less than 2: 1, more preferably 5-10: 1
- the method for collecting acetone ruthenium from the bottom liquid may include: extracting the bottom liquid by 3-5 times with a halogenated hydrocarbon, collecting the extraction layer solution, and extracting the extraction layer solution at not higher than 70 ° C.
- the temperature preferably from room temperature to 70 ° C
- the solvent is evaporated to give acetone oxime.
- the method for separating 2,3-dimethyl-2,3-dinitrobutane from the reaction product may be Including: cooling the reaction product to 0-40 ° C, followed by solid-liquid separation (such as centrifugation, filtration, etc.), washing the solid obtained by the solid-liquid separation process with acetone (mainly the modified titanium silicon) a molecular sieve catalyst), and mixing the obtained washing liquid with the liquid obtained by the solid-liquid separation process, and then evaporating (for example, spinning) the obtained mixed liquid to remove acetone, then performing cooling filtration, and filtering the cooling The resulting solid was washed with water and dried.
- the conditions of the evaporation are not particularly limited as long as the acetone in the mixed liquid can be substantially removed.
- step (2-1) since acetone ruthenium added as a reaction raw material in the step (2-1) has a partial residue, and in the step (2-2), in the presence of the modified titanium silicon molecular sieve catalyst, Part of the acetone undergoes ketone amination with hydrogen peroxide and ammonia to form acetone oxime. Therefore, the reaction product of step (2-1) and step (2-2) contains acetone oxime.
- the method further comprises: separating 2,3-dimethyl-2,3- from the reaction product of step (2-1) and/or step (2-2) above.
- acetone oxime is separated from the liquid obtained by the cooling filtration process (for example, extraction separation may be carried out with a halogenated hydrocarbon), and the separated acetone ruthenium is used as at least a partial step ( 2-1) Material.
- Acetone conversion rate acetone consumption / acetone feed amount ⁇ ⁇ %
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 1, except that in the step (2), TS-1 (prepared according to the method of Example 1 in Patent Application CN1301599A) was used instead of the modified TS-1 catalyst Cl.
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 1, except that in the step (2), water was added in an amount of 116 g. As a result, the molar yield of DMNB was 45.3%, and the obtained DMNB product had a melting point of 210.5-212.1 °C.
- Example 3
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 1, except that in the step (2), the amount of the modified TS-1 catalyst C1 was 4.3 g. As a result, the molar yield of DMNB was 45.6%. The resulting DMNB product has a melting point of 210.2-212.0 °C.
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 1, except that in the step (2), the temperature at which the hydrogen peroxide and the aqueous ammonia were added dropwise was 70 V, and the heat retention reaction was carried out at 75 °C. As a result, the molar yield of DMNB was 36.5%, and the melting point of the obtained DMNB product was 210.2-212.2 °C.
- Example 5
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 1, except that in the step (2), the hydrogen peroxide was added in an amount of 339.3 g, which contained about 3 mol of 3 ⁇ 40 2 . As a result, the molar yield of DMNB was 53.4%, and the melting point of the obtained DMNB product was 210.1-212.2 °C.
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 1, except that in the step (1), the above process was repeated twice using the obtained solid precipitate instead of the above TS-1, and acetone was removed during the second iteration of the reaction.
- the conversion was about 90%, so that the modified TS-1 catalyst C2 was obtained; and the modified TS-1 catalyst C2 was replaced with the modified TS-1 catalyst C2 in the step (2).
- the molar yield of DMNB was 1.6%
- the melting point of the obtained DMNB product was 210.2-212.2 °C.
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- Modified titanium silicalite catalyst 1 L of water, 1160 g (20 mol) of acetone and 100 g of TS-1 (prepared according to the method of Example 1 of Patent Application CN1301599A) were added to the reaction vessel, followed by dropwise addition of a concentration of 36 mol of NH 3 to the solution at 70 ° C. 30% by weight of aqueous ammonia and 30% by weight of hydrogen peroxide containing 20 mol of H 2 O 2 were added, and the reaction was incubated for 0.5 hour after completion of the dropwise addition, and then the solid precipitate was separated by centrifugation.
- the liquid obtained after each centrifugation is mixed and added to a rectification column for rectification separation.
- the number of theoretical plates of the rectification column is 30, the filler is a stainless steel wire mesh, the diameter of the column is 600 mm, and the height of the column is 12 m.
- the bottom temperature is controlled to 110 ° C
- the reflux ratio is controlled to 8: 1; then the bottom liquid is cooled to room temperature, extracted three times with tetrachloroethylene, combined with the extract liquid, and then reduced at about 65 ° C
- its infrared spectrum and mass spectrometry data are as follows:
- IR, Vmax / cm- 1 3200, 2920, 2896, 1681, 1498, 1371, 1268, 1072, 949, 81;
- the solution was adjusted to a pH of 10 in the flask, and after the completion of the dropwise addition, the reaction was kept at 90 ° C for 0.5 h, then cooled to room temperature, and centrifuged at 3000 rpm to separate the solid (mainly modified).
- TS-1 catalyst was washed twice with 6 g of acetone, and the obtained washing liquid was mixed with the liquid separated by centrifugation, and steamed at 80 ° C and 0.05 MPa to remove acetone, and the remaining liquid was removed.
- Cool to room temperature for filtration use The solid obtained by filtration was washed with water and then dried at 70 ° C to obtain 3.9 g (about 0.022 mol) of DMNB product.
- the molar yield of DMNB was 11.2%, and the melting point was 210.2-212.0 ° C.
- the NMR spectrum data is as follows:
- the DMNB was prepared according to the method of Example 9, except that in the step (2), TS-1 (prepared according to the method of Example 1 in Patent Application CN1301599A) was used instead of the modified TS-1 catalyst C5.
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 9, except that in the step (2), water was added in an amount of 146 g. As a result, the molar yield of DMNB was 12.5%, and the melting point of the obtained DMNB product was 210.5-212.1 o C o Example 11
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 9, except that in the step (2), the amount of the modified TS-1 catalyst C1 was 4.3 g. As a result, the molar yield of DMNB was 11.4%, and the melting point of the obtained DMNB product was 210.2-212.0 °C.
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 9, except that in the step (2), the pH was adjusted by using 30% by weight of aqueous ammonia instead of 30% by weight of sodium hydroxide solution. As a result, the molar yield of DMNB was 5.7%, and the obtained DMNB product had a melting point of 210.3-212.2 °C.
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 9, except that in the step (2), the temperature at which the hydrogen peroxide and the aqueous ammonia were added dropwise was 70 V, and the heat retention reaction was carried out at 75 °C. As a result, the molar yield of DMNB was 8.9%, and the melting point of the obtained DMNB product was 210.2-212.2 °C.
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 9, except that in the step (2), the hydrogen peroxide was added in an amount of 90.6 g, which was about 0.8 mol 3 ⁇ 40 2 . As a result, the molar yield of DMNB was 8.6%, and the obtained DMNB product had a melting point of 210.1 to 212.2 °C.
- Example 15
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the DMNB was prepared according to the method of Example 9, except that in the step (1), the above-mentioned process was repeated twice using the obtained solid precipitate instead of the above TS-1, and the second repeat was repeated.
- the conversion of acetone in the process should be about 90%, thus obtaining the modified TS-1 catalyst C6; and the modified TS-1 catalyst C6 is replaced with the modified TS-1 catalyst C6 in the step (2).
- the molar yield of DMNB was 1.3%, and the melting point of the obtained DMNB product was 210.2-212.2 °C.
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- the modified TS-1 catalyst C3 was obtained according to the method of Example 7.
- This example is intended to illustrate the preparation of the 2,3-dimethyl-2,3-dinitrobutanthene of the present invention.
- Modified titanium silicalite catalyst The modified TS-1 catalyst C4 was obtained according to the method of Example 7.
- the pH was adjusted to 8, and after the completion of the dropwise addition, the reaction was kept at 85 ° C for 1 h, then cooled to room temperature, centrifuged at 3000 rpm, and the separated solid (mainly modified TS-1 catalyst) was washed with 6 g of acetone. Twice, and the obtained washing liquid is mixed with the liquid separated by centrifugation, and steamed at 80 ° C, 0.05 MPa to remove acetone, and then the remaining liquid is cooled to room temperature for filtration, washed with water and filtered. The obtained solid was then dried at 70 ° C to obtain 4.0 g (about 0.023 mol) of DMNB product. The molar yield of DMNB was 11.3%, and the melting point was 210.2 to 212.0 °C.
- the DMNB can be produced according to the method of the present invention without using dangerous chemicals such as 2-nitropropene, NaH and the like.
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- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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Priority Applications (1)
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US13/823,831 US8692036B2 (en) | 2011-05-20 | 2011-09-05 | Method for preparing 2,3-dimethyl-2,3-dinitrobutane |
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CN201110146632.5 | 2011-05-20 | ||
CN201110146239.6 | 2011-05-20 | ||
CN 201110146239 CN102267913B (zh) | 2011-05-20 | 2011-05-20 | 2,3-二甲基-2,3二硝基丁烷的合成方法 |
CN 201110146632 CN102267914B (zh) | 2011-05-20 | 2011-05-20 | 2,3-二甲基-2,3-二硝基丁烷的制备方法 |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US6911328B2 (en) * | 2002-09-04 | 2005-06-28 | The United States Of America As Represented By The Secretary Of The Navy | Method for producing 2,3-dimethyl-2,3-dinitrobutane and product thereby |
CN1743314A (zh) * | 2004-09-03 | 2006-03-08 | 首都医科大学 | 2-取代-4,4,5,5-四甲基-1-氧咪唑啉、及其合成和应用 |
RU2323206C1 (ru) * | 2006-10-03 | 2008-04-27 | Федеральное государственное унитарное предприятие "Государственный научно-исследовательский институт "Кристалл" | Способ получения 2,3-диметил-2,3-динитробутана |
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- 2011-09-05 US US13/823,831 patent/US8692036B2/en not_active Expired - Fee Related
- 2011-09-05 WO PCT/CN2011/079347 patent/WO2012159390A1/zh active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6911328B2 (en) * | 2002-09-04 | 2005-06-28 | The United States Of America As Represented By The Secretary Of The Navy | Method for producing 2,3-dimethyl-2,3-dinitrobutane and product thereby |
CN1743314A (zh) * | 2004-09-03 | 2006-03-08 | 首都医科大学 | 2-取代-4,4,5,5-四甲基-1-氧咪唑啉、及其合成和应用 |
RU2323206C1 (ru) * | 2006-10-03 | 2008-04-27 | Федеральное государственное унитарное предприятие "Государственный научно-исследовательский институт "Кристалл" | Способ получения 2,3-диметил-2,3-динитробутана |
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US20130184504A1 (en) | 2013-07-18 |
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