JP2012144448A - Process for producing methyliminobisdialkyl acetamide - Google Patents
Process for producing methyliminobisdialkyl acetamide Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 9
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 title 2
- YYROPELSRYBVMQ-UHFFFAOYSA-N 4-toluenesulfonyl chloride Chemical compound CC1=CC=C(S(Cl)(=O)=O)C=C1 YYROPELSRYBVMQ-UHFFFAOYSA-N 0.000 claims abstract description 14
- XWSGEVNYFYKXCP-UHFFFAOYSA-N 2-[carboxymethyl(methyl)amino]acetic acid Chemical compound OC(=O)CN(C)CC(O)=O XWSGEVNYFYKXCP-UHFFFAOYSA-N 0.000 claims abstract description 11
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims abstract description 10
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 claims abstract description 6
- -1 imidazole compound Chemical class 0.000 claims abstract description 6
- XLSZMDLNRCVEIJ-UHFFFAOYSA-N methylimidazole Natural products CC1=CNC=N1 XLSZMDLNRCVEIJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical class ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 150000003335 secondary amines Chemical class 0.000 claims description 6
- LAWOZCWGWDVVSG-UHFFFAOYSA-N dioctylamine Chemical compound CCCCCCCCNCCCCCCCC LAWOZCWGWDVVSG-UHFFFAOYSA-N 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- JQVDAXLFBXTEQA-UHFFFAOYSA-N dibutylamine Chemical compound CCCCNCCCC JQVDAXLFBXTEQA-UHFFFAOYSA-N 0.000 claims description 4
- WEHWNAOGRSTTBQ-UHFFFAOYSA-N dipropylamine Chemical compound CCCNCCC WEHWNAOGRSTTBQ-UHFFFAOYSA-N 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- MJCJUDJQDGGKOX-UHFFFAOYSA-N n-dodecyldodecan-1-amine Chemical compound CCCCCCCCCCCCNCCCCCCCCCCCC MJCJUDJQDGGKOX-UHFFFAOYSA-N 0.000 claims description 2
- PXSXRABJBXYMFT-UHFFFAOYSA-N n-hexylhexan-1-amine Chemical compound CCCCCCNCCCCCC PXSXRABJBXYMFT-UHFFFAOYSA-N 0.000 claims description 2
- 125000001664 diethylamino group Chemical group [H]C([H])([H])C([H])([H])N(*)C([H])([H])C([H])([H])[H] 0.000 claims 1
- 239000010808 liquid waste Substances 0.000 abstract description 7
- 230000002285 radioactive effect Effects 0.000 abstract description 7
- 229910052763 palladium Inorganic materials 0.000 abstract description 4
- 229910052713 technetium Inorganic materials 0.000 abstract description 4
- 229910052778 Plutonium Inorganic materials 0.000 abstract description 2
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 2
- 125000000467 secondary amino group Chemical class [H]N([*:1])[*:2] 0.000 abstract 1
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 6
- 239000003153 chemical reaction reagent Substances 0.000 description 5
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 5
- 238000000746 purification Methods 0.000 description 4
- 238000005160 1H NMR spectroscopy Methods 0.000 description 3
- FBPZSFPJRRECHB-UHFFFAOYSA-N 2-methylimino-N,N-dipropylacetamide Chemical compound CN=CC(=O)N(CCC)CCC FBPZSFPJRRECHB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 3
- YVIZGKSGXKMWFE-UHFFFAOYSA-N 2-methylimino-N,N-dioctylacetamide Chemical compound CN=CC(=O)N(CCCCCCCC)CCCCCCCC YVIZGKSGXKMWFE-UHFFFAOYSA-N 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FPMDEUIDDHWGIX-UHFFFAOYSA-N N,N-diethyl-2-methyliminoacetamide Chemical compound CN=CC(=O)N(CC)CC FPMDEUIDDHWGIX-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910052702 rhenium Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 1
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical compound C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003810 ethyl acetate extraction Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002927 high level radioactive waste Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 150000004715 keto acids Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- XKBGEWXEAPTVCK-UHFFFAOYSA-M methyltrioctylammonium chloride Chemical compound [Cl-].CCCCCCCC[N+](C)(CCCCCCCC)CCCCCCCC XKBGEWXEAPTVCK-UHFFFAOYSA-M 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000012454 non-polar solvent Substances 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000010898 silica gel chromatography Methods 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- PJMJFVQKDBRMIP-UHFFFAOYSA-N tetraphenylarsonium Chemical class C1=CC=CC=C1[As+](C=1C=CC=CC=1)(C=1C=CC=CC=1)C1=CC=CC=C1 PJMJFVQKDBRMIP-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C231/00—Preparation of carboxylic acid amides
- C07C231/02—Preparation of carboxylic acid amides from carboxylic acids or from esters, anhydrides, or halides thereof by reaction with ammonia or amines
Abstract
Description
本発明は、メチルイミノビスジアルキルアセトアミドの製造方法に関する。 The present invention relates to a method for producing methyliminobisdialkylacetamide.
原子力分野で発生する高レベル放射性廃液中には、Ｐｄ、Ｔｃ、Ｍｏ、Ｐｕなどの金属類が含まれている。Ｔｃは、長半減期で中間貯蔵後の高レベル放射性廃液中で強い放射能を出し続けるので、長期にわたる潜在的な危険性がある。Ｍｏは、ガラス固化体の強度を下げる金属であり、ガラス固化体中の濃度が制限される元素である。Ｐｕは、使用済み燃料中に大量に含まれ、高速増殖炉では燃料として利用することのできる元素である。したがって、これらの金属は高レベル放射性廃液中から分離回収し、その他の元素と別の処理をする必要がある。 Metals such as Pd, Tc, Mo and Pu are contained in the high-level radioactive liquid waste generated in the nuclear field. Tc poses a long-term potential risk because it has a long half-life and continues to emit strong radioactivity in high-level radioactive waste after intermediate storage. Mo is a metal that lowers the strength of the vitrified body, and is an element whose concentration in the vitrified body is limited. Pu is an element that is contained in a large amount in spent fuel and can be used as fuel in a fast breeder reactor. Therefore, these metals need to be separated and recovered from high-level radioactive liquid waste and treated separately from other elements.
しかし、これらの金属類は水溶液中においてＴｃＯ４ −、ＭｏＯ４ −などの陰イオンとして存在するため、通常の抽出剤（例えばAliquat336、テトラフェニルアルソニウム塩等）では抽出しにくい。Ｔｃの抽出法については種々提案されている（非特許文献１及び２）が、分配比が低く、被抽出金属に伴って抽出されてしまうなど、いまだ不十分である。また、高レベル放射性廃液中のＰｄは、溶媒抽出系において有機相に分配されるが、この有機相は金属濃度が高くなると希釈剤から主としてなる軽い相と金属が濃縮された重い相（第三相という）が生成し、プロセス運転時にラインの目詰まり等の問題を起こす場合がある。Ｃｒ、Ｗ、Ｒｅは高レベル放射性廃液中における存在量は少ないが、水溶液中でオキソ酸（Ｃｒ２Ｏ７ ２−、ＷＯ４ ２−、ＲｅＯ４ −）として存在し、一般的に分離することが困難である。さらに、高レベル放射性廃液は硝酸水溶液であり、溶媒抽出に用いる有機溶剤として毒性が低く安定なドデカンが好適であるが、従来の抽出剤はドデカン中では使用することができない。
However, since these metals exist as anions such as TcO 4 − and MoO 4 − in an aqueous solution, they are difficult to extract with a normal extractant (for example, Aliquat336, tetraphenylarsonium salt, etc.). Various methods of extracting Tc have been proposed (
本発明者らは、上記課題を解決する抽出剤として、下記一般式： As an extractant for solving the above-mentioned problems, the present inventors have the following general formula:
（式中、Ｒは炭素数が８個〜１２個のアルキル基を示す）
で表されるメチルイミノビスジアルキルアセトアミドを用いることを提案し（特許文献１）、Ｔｃ、Ｒｅ、Ｐｄなどに対して高い抽出能を有することを報告した（非特許文献３及び４）
メチルイミノビスジアルキルアセトアミドは、３−メチルイミノ二酢酸を塩化チオニルやジシクロヘキシルカルボジイミドなどの縮合剤を用いて、酸塩化物を生成し、その後、トリエチルアミンなどの存在下でジメチルアミンやジ−ｎ−オクチルアミンなどの二級アミン化合物を氷点下で冷却しながら添加して緩やかに反応させ、得られた生成物を水、水酸化ナトリウム及び塩酸溶液で洗浄し、シリカゲルカラムに繰り返し通して単離精製することで製造することができることが知られている。しかし、塩化チオニルは刺激臭を有するため、頻繁かつ大量に用いることには適してない。また、従来の製造法では、加熱を必要とし、メチルイミノビスジアルキルアセトアミドの収率が２０％と低かった。
(Wherein R represents an alkyl group having 8 to 12 carbon atoms)
(Patent document 1), and reported that it has high extraction ability for Tc, Re, Pd, etc. (non-patent
Methyliminobisdialkylacetamide uses 3-methyliminodiacetic acid with a condensing agent such as thionyl chloride or dicyclohexylcarbodiimide to produce an acid chloride, and then dimethylamine or di-n-octylamine in the presence of triethylamine or the like. Secondary amine compounds such as the above are added while cooling under freezing, and the reaction is allowed to proceed slowly. The resulting product is washed with water, sodium hydroxide and hydrochloric acid solution, and repeatedly passed through a silica gel column for isolation and purification. It is known that it can be manufactured. However, thionyl chloride has an irritating odor and is not suitable for frequent and large use. In addition, the conventional production method requires heating, and the yield of methyliminobisdialkylacetamide was as low as 20%.
本発明は、メチルイミノ−Ｎ，Ｎ−ジアルキルアセトアミドの製造方法を提供することを目的とする。本発明の製造方法によれば、特に高レベル放射性廃液からのＰｄ、Ｔｃ、Ｍｏ、Ｐｕを抽出するための抽出剤として用いることができるアルキル基がオクチル基、デシル基、ドデシル基であるメチルイミノ−Ｎ，Ｎ−ジアルキルアセトアミドを安全かつ効率的に製造することができる方法を提供することが可能となる。 An object of the present invention is to provide a method for producing methylimino-N, N-dialkylacetamide. According to the production method of the present invention, methylimino- in which the alkyl group that can be used as an extractant for extracting Pd, Tc, Mo, Pu from high-level radioactive liquid waste is an octyl group, a decyl group, or a dodecyl group. It becomes possible to provide a method by which N, N-dialkylacetamide can be produced safely and efficiently.
本発明によれば、メチルイミノ２酢酸とメチルイミダゾールとを脱水ジクロロメタン中で混合し、氷温下でｐ−トルエンスルホニルクロライドを添加して、メチルイミノ２酢酸のイミダゾール化合物を中間体として得て、当該中間体に２級アミンを添加する、下記一般式（Ｉ）： According to the present invention, methyliminodiacetic acid and methylimidazole are mixed in dehydrated dichloromethane and p-toluenesulfonyl chloride is added under ice temperature to obtain an imidazole compound of methyliminodiacetic acid as an intermediate. A secondary amine is added to the body, the following general formula (I):
（式中、Ｒは炭素数が２個〜１２個のアルキル基を示す）
で表されるメチルイミノ−Ｎ，Ｎ−ジアルキルアセトアミド（以下「ＭＩＤＡＡ」と称す）の製造方法が提供される。
(Wherein R represents an alkyl group having 2 to 12 carbon atoms)
A method for producing methylimino-N, N-dialkylacetamide (hereinafter referred to as “MIDAA”) represented by the formula:
本発明における合成スキームは以下のとおりである。 The synthesis scheme in the present invention is as follows.
本発明の製造方法において用いられる２級アミンとしては、ジエチルアミン、ジプロピルアミン、ジオクチルアミン、ジブチルアミン、ジヘキシルアミン、ジドデシルアミンを好適に挙げることができる。ジエチルアミンを用いる場合にはメチルイミノ−Ｎ，Ｎ−ジエチルアセトアミド（ＭＩＤＥＡ）、ジプロピルアミンを用いる場合にはメチルイミノ−Ｎ，Ｎ−ジプロピルアセトアミド（ＭＩＤＰＡ）、ジオクチルアミンを用いる場合にはメチルイミノ−Ｎ，Ｎ−ジオクチルアセトアミド（ＭＩＤＯＡ）を合成することができる。ＭＩＤＥＡ及びＭＩＤＰＡは水によく溶解し、ＭＩＤＯＡは疎水性が高くドデカンなどの無極性溶媒に溶解する。 Preferred examples of the secondary amine used in the production method of the present invention include diethylamine, dipropylamine, dioctylamine, dibutylamine, dihexylamine and didodecylamine. Methylimino-N, N-diethylacetamide (MIDEA) when using diethylamine, Methylimino-N, N-dipropylacetamide (MIDPA) when using dipropylamine, Methylimino-N, when using dioctylamine N-dioctylacetamide (MIDOA) can be synthesized. MIDEA and MIDPA are well soluble in water, and MIDOA is highly hydrophobic and soluble in nonpolar solvents such as dodecane.
本発明の製造方法において用いられる試薬の比率は、メチルイミノ２酢酸１００質量部に対して、メチルイミダゾール６００質量部以上８００質量部以下、ｐ−トルエンスルホニルクロライド２４０質量部以上３２０質量部以下が好ましい。試薬の使用量を上記範囲とすることで、高い収率でＭＩＤＡＡを合成することができるが、試薬の使用量が多すぎても収率を向上させることはできず、メチルイミダゾール６００質量部及びｐ−トルエンスルホニルクロライド２４０質量部の組み合わせが最適で１０〜４０ｇ（収率７０％）のＭＩＤＡＡを合成することができる。 The ratio of the reagent used in the production method of the present invention is preferably from 600 parts by mass to 800 parts by mass of methylimidazole and from 240 parts by mass to 320 parts by mass of p-toluenesulfonyl chloride with respect to 100 parts by mass of methyliminodiacetic acid. By making the amount of reagent used in the above range, MIDAA can be synthesized with a high yield, but even if the amount of reagent used is too large, the yield cannot be improved, and 600 parts by mass of methylimidazole and A combination of 240 parts by mass of p-toluenesulfonyl chloride is optimal, and 10 to 40 g (yield 70%) of MIDAA can be synthesized.
合成されたＭＩＤＡＡ化合物は、酢酸エチル抽出法、減圧蒸留法、カラム分離法などの精製法を適宜組み合わせて精製することができる。 The synthesized MIDAA compound can be purified by appropriately combining purification methods such as an ethyl acetate extraction method, a vacuum distillation method, and a column separation method.
本発明によれば、以下の効果が得られる。
（１）塩化チオニルを用いる従来法では、収率が２０％程度であったが、本発明では７０％程度と高い収率でＭＩＤＡＡ化合物を製造することができる。
（２）従来法で用いる塩化チオニルは揮発性のある液体で、刺激臭を持ち、合成スケールアップのための大量使用には不適であった。本発明では、塩化チオニルを用いないため、これらの問題を解決できる。
（３）従来法では、塩化チオニルとメチルイミノ２酢酸を加熱しながら反応させるが、本法では氷温下で反応させるため、より安全に作業することができる。
According to the present invention, the following effects can be obtained.
(1) In the conventional method using thionyl chloride, the yield was about 20%, but in the present invention, the MIDAA compound can be produced with a high yield of about 70%.
(2) Thionyl chloride used in the conventional method is a volatile liquid, has an irritating odor, and is unsuitable for large-scale use for synthetic scale-up. In the present invention, since thionyl chloride is not used, these problems can be solved.
(3) In the conventional method, thionyl chloride and methyliminodiacetic acid are reacted with heating, but in this method, the reaction is performed at an ice temperature, so that the work can be performed more safely.
以下、実施例により本発明を具体的に説明するが、本発明はこれらに限定されるものではない。
［実施例１］
メチルイミノ２酢酸（ＲＣＯＯＨ，１５ｇ）とメチルイミダゾール（ＮＭＩ，５０ｍｌ）を脱水ジクロロメタン中（４０ｍｌ）で混合、撹拌する。氷温下でｐ−トルエンスルホニルクロライド（ＴｓＣｌ，４６ｇ）を加えて脱水ジクロロメタン中（２４０ｍｌ）で１時間撹拌し、メチルイミノ２酢酸のイミダゾール化合物を生成した。得られたメチルイミノ２酢酸のイミダゾール化合物に、ジエチルアミン（２５ｍｌ）を加えて１昼夜撹拌した。得られた化合物を精製し、酢酸エチルで抽出した後に、減圧蒸留を行い、目的物を含む粗生成物を得た後、さらにシリカゲルカラムクロマトグラフにかけて、純粋なＭＩＤＥＡを得た。1H-NMR分析より、メチルイミノ−Ｎ，Ｎ−ジエチルアセトアミド（ＭＩＤＥＡ）であることを確認した（図１）。
EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.
[Example 1]
Methyliminodiacetic acid (RCOOH, 15 g) and methylimidazole (NMI, 50 ml) are mixed in dehydrated dichloromethane (40 ml) and stirred. P-Toluenesulfonyl chloride (TsCl, 46 g) was added at ice temperature, and the mixture was stirred in dehydrated dichloromethane (240 ml) for 1 hour to produce an imidazole compound of methyliminodiacetic acid. Diethylamine (25 ml) was added to the resulting imidazole compound of methyliminodiacetic acid and stirred for one day. The obtained compound was purified, extracted with ethyl acetate, and then distilled under reduced pressure to obtain a crude product containing the desired product, which was further subjected to silica gel column chromatography to obtain pure IDEEA. From 1 H-NMR analysis, it was confirmed to be methylimino-N, N-diethylacetamide (MIDEA) (FIG. 1).
収率は７０％であった。
［実施例２］
ジエチルアミンをジプロピルアミンに変えた以外は、実施例１と同様に行い、メチルイミノ−Ｎ，Ｎ−ジプロピルアセトアミド（ＭＩＤＰＡ）を合成した。各試薬の使用量は、第二級アミンの種類を変えても実施例１と同様とした。精製後、得られた化合物の1H-NMR分析より、メチルイミノ−Ｎ，Ｎ−ジプロピルアセトアミド（ＭＩＤＰＡ）であることを確認した（図２）。
The yield was 70%.
[Example 2]
Methylimino-N, N-dipropylacetamide (MIDPA) was synthesized in the same manner as in Example 1 except that diethylamine was changed to dipropylamine. The amount of each reagent used was the same as in Example 1 even if the type of secondary amine was changed. After purification, 1 H-NMR analysis of the obtained compound confirmed that it was methylimino-N, N-dipropylacetamide (MIDPA) (FIG. 2).
収率は６５％であった。
［実施例３］
ジエチルアミンをジオクチルアミンに変えた以外は、実施例１と同様に行い、メチルイミノ−Ｎ，Ｎ−ジオクチルアセトアミド（ＭＩＤＯＡ）を合成した。各試薬の使用量は、第二級アミンの種類を変えても実施例１と同様とした。精製後、得られた化合物の1H-NMR分析より、メチルイミノ−Ｎ，Ｎ−ジオクチルアセトアミド（ＭＩＤＯＡ）であることを確認した（図３）。
The yield was 65%.
[Example 3]
Methylimino-N, N-dioctylacetamide (Midoa) was synthesized in the same manner as in Example 1 except that diethylamine was changed to dioctylamine. The amount of each reagent used was the same as in Example 1 even if the type of secondary amine was changed. After purification, 1 H-NMR analysis of the obtained compound confirmed that it was methylimino-N, N-dioctylacetamide (MIDOA) (FIG. 3).
収率は７１％であった。 The yield was 71%.
より安全に効率よく合成することができ、低コストで、Ｔｃの抽出剤として有望なＭＩＤＡＡ化合物を供給できる。 It can be synthesized more safely and efficiently, and can supply a promising MIDAA compound as a Tc extractant at low cost.
Claims (2)
で表されるメチルイミノ−Ｎ，Ｎ−ジアルキルアセトアミドの製造方法。 Methyliminodiacetic acid and methylimidazole are mixed in dehydrated dichloromethane, p-toluenesulfonyl chloride is added under ice temperature to obtain an imidazole compound of methyliminodiacetic acid as an intermediate, and a secondary amine is added to the intermediate. The following general formula (I):
A process for producing methylimino-N, N-dialkylacetamide represented by the formula:
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