JP4963033B2 - Method for producing 9,9-bis (aminoalkyl) fluorene compound - Google Patents

Method for producing 9,9-bis (aminoalkyl) fluorene compound Download PDF

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JP4963033B2
JP4963033B2 JP2006079769A JP2006079769A JP4963033B2 JP 4963033 B2 JP4963033 B2 JP 4963033B2 JP 2006079769 A JP2006079769 A JP 2006079769A JP 2006079769 A JP2006079769 A JP 2006079769A JP 4963033 B2 JP4963033 B2 JP 4963033B2
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bis
fluorene
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育夫 伊藤
高国 鈴木
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Air Water Inc
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Description

本発明は、ポリアミドやポリイミドの原料として有用な9,9−ビス(アミノアルキル)フルオレン化合物の経済的な製造方法に関する。   The present invention relates to an economical method for producing a 9,9-bis (aminoalkyl) fluorene compound useful as a raw material for polyamide and polyimide.

9,9−ビス(アミノアルキル)フルオレン化合物は、自由体積を大きくするカルド骨格を有しており、特異な性質を有するポリアミドやポリイミドの原料として期待されている。従来、この9,9−ビス(アミノアルキル)フルオレン化合物の具体的な製造例としては、9,9−ビス(シアノエチル)フルオレンを、エタノール中、スポンジ(ラネー)ニッケル触媒の存在下で水素化して9,9−ビス(アミノプロピル)フルオレンを製造する方法が知られている(特許文献1)。この文献においては、目的物の収率や品質に関する記載はないが、蒸留精製した後も粘性ある液体として得られているところから、副生物である不純物をかなり含むものと考えられる。同じく9,9−ビス(シアノエチル)フルオレンを、アンモニアを含有するイソプロパノールやトルエン中、ケイ酸ナトリウムと酸化コバルトの混合物を水素還元することによって得られる触媒の存在下で水素化する方法も知られている(特許文献2、3)。この文献においては、目的物と共に、ニトリル基の一方のみが水素化されたアミノニトリルを含めた収率が記載されており、また反応時間が非常に長いところから、この方法では、短時間で二つのニトリル基を完全に水素化することは困難であると想定される。   The 9,9-bis (aminoalkyl) fluorene compound has a cardo skeleton that increases the free volume, and is expected as a raw material for polyamide and polyimide having unique properties. Conventionally, as a specific production example of the 9,9-bis (aminoalkyl) fluorene compound, 9,9-bis (cyanoethyl) fluorene is hydrogenated in ethanol in the presence of a sponge (Raney) nickel catalyst. A method for producing 9,9-bis (aminopropyl) fluorene is known (Patent Document 1). Although there is no description regarding the yield and quality of the target product in this document, it is considered that the product contains a substantial amount of impurities as a by-product because it is obtained as a viscous liquid after distillation purification. Also known is a method of hydrogenating 9,9-bis (cyanoethyl) fluorene in the presence of a catalyst obtained by hydrogen reduction of a mixture of sodium silicate and cobalt oxide in isopropanol or toluene containing ammonia. (Patent Documents 2 and 3). In this document, the yield including the target product and an aminonitrile in which only one of the nitrile groups is hydrogenated is described, and the reaction time is very long. It is assumed that it is difficult to completely hydrogenate two nitrile groups.

アメリカ特許第2320029号明細書US Patent No. 2320029 アメリカ特許第3728284号明細書US Pat. No. 3,728,284 アメリカ特許第4007226号明細書US Patent No. 4007226

そこで本発明の目的は、9,9−ビス(シアノアルキル)フルオレン化合物を水素化することによって、相当する9,9−ビス(アミノアルキル)フルオレン化合物を、短時間の反応で収率よく製造する方法を提供することにある。   Accordingly, an object of the present invention is to produce a corresponding 9,9-bis (aminoalkyl) fluorene compound in a high yield with a short reaction time by hydrogenating the 9,9-bis (cyanoalkyl) fluorene compound. It is to provide a method.

すなわち本発明によれば、下記一般式(1)

Figure 0004963033
(式中、Rは、炭素数1〜4のアルキレン基、Xは水素、ハロゲン、炭素数1〜4のアルキル基又は炭素数1〜3のアルコキシ基を表す)で示される9,9−ビス(シアノアルキル)フルオレン化合物と、アンモニアを含有するアルコール溶媒およびスポンジコバルト触媒とを仕込んだ後、接触水素化することを特徴とする、下記一般式(2)
Figure 0004963033
(式中、R及びXは上記と同じ)で表される9,9−ビス(アミノアルキル)フルオレン化合物の製造方法が提供される。 That is, according to the present invention, the following general formula (1)
Figure 0004963033
(Wherein, R represents an alkylene group having 1 to 4 carbon atoms, X represents hydrogen, halogen, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 3 carbon atoms) They were charged and (cyanoalkyl) fluorene compound, an alcohol solvent and a sponge cobalt catalyst containing ammonia, characterized by catalytic hydrogenation, the following general formula (2)
Figure 0004963033
A method for producing a 9,9-bis (aminoalkyl) fluorene compound represented by the formula (wherein R and X are the same as above) is provided.

本発明によれば、ポリアミド、ポリイミドの原料として有用な9,9−ビス(アミノアルキル)フルオレン化合物を、短時間で収率よく製造する方法を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the method of manufacturing the 9,9-bis (aminoalkyl) fluorene compound useful as a raw material of polyamide and a polyimide with a sufficient yield in a short time can be provided.

上記一般式(1)で表される9,9−ビス(シアノアルキル)フルオレン化合物において、Rは炭素数1〜4のヒドロカルビレン基、例えばメチレン基、エチレン基、トリメチレン基、イソプロピリデン基、テトラメチレン基などであり、Xは、水素;ハロゲン、例えば、フッ素、塩素、臭素、沃素など;炭素数1〜4のアルキル基、例えば、メチル基、エチル基、イソプロピル基、sec−ブチル基、t−ブチル基など;あるいは炭素数1〜3のアルコキシ基、例えば、メトキシ基、エトキシ基、プロポキシ基などを表し、二つのXは同一でも、異なるものであってもよい。9,9−ビス(シアノアルキル)フルオレン化合物としてより具体的には、9,9−ビス(シアノメチル)フルオレン、9,9−ビス(2−シアノエチル)フルオレン、9,9−ビス(3−シアノプロピル)フルオレン、9,9−ビス(2−シアノプロピル)フルオレン、9,9−ビス(4−シアノブチル)フルオレン、9,9−ビス(3−シアノブチル)フルオレン、9,9−ビス(2−シアノブチル)フルオレン、2,7−ジクロロ−9,9−ビス(2−シアノエチル)フルオレン、2,7−ジブロモ−9,9−ビス(2−シアノエチル)フルオレン、2,7−ジメチル−9,9−ビス(2−シアノエチル)フルオレン、2,7−ジメトキシ−9,9−ビス(2−シアノエチル)フルオレンなどを代表例として例示することができる。   In the 9,9-bis (cyanoalkyl) fluorene compound represented by the general formula (1), R is a hydrocarbylene group having 1 to 4 carbon atoms, such as a methylene group, an ethylene group, a trimethylene group, an isopropylidene group, A tetramethylene group and the like, wherein X is hydrogen; halogen, for example, fluorine, chlorine, bromine, iodine, etc .; an alkyl group having 1 to 4 carbon atoms, for example, a methyl group, an ethyl group, an isopropyl group, a sec-butyl group, a t-butyl group or the like; or an alkoxy group having 1 to 3 carbon atoms, for example, a methoxy group, an ethoxy group, a propoxy group, or the like, and two Xs may be the same or different. More specific examples of the 9,9-bis (cyanoalkyl) fluorene compound include 9,9-bis (cyanomethyl) fluorene, 9,9-bis (2-cyanoethyl) fluorene, and 9,9-bis (3-cyanopropyl). ) Fluorene, 9,9-bis (2-cyanopropyl) fluorene, 9,9-bis (4-cyanobutyl) fluorene, 9,9-bis (3-cyanobutyl) fluorene, 9,9-bis (2-cyanobutyl) Fluorene, 2,7-dichloro-9,9-bis (2-cyanoethyl) fluorene, 2,7-dibromo-9,9-bis (2-cyanoethyl) fluorene, 2,7-dimethyl-9,9-bis ( 2-Cyanoethyl) fluorene, 2,7-dimethoxy-9,9-bis (2-cyanoethyl) fluorene and the like can be exemplified as representative examples.

本発明においては、上記9,9−ビス(シアノアルキル)フルオレン化合物を、アンモニアを含有するアルコール中、スポンジコバルト触媒の存在下で水素化して、相当する9,9−ビス(アミノアルキル)フルオレン化合物を製造するものである。溶媒として使用することができるアルコールとしては、メタノール、エタノール、イソプロパノール、n−プロパノールなどを例示することができるが、メタノールが最も好ましい。好適なアルコールの使用量は、9,9−ビス(シアノアルキル)フルオレン化合物1質量部に対し、0.5〜20質量部、好ましくは1〜10質量部、とくに好ましくは2〜8質量部である。またアンモニアは、9,9−ビス(シアノアルキル)フルオレン化合物1モルに対して2〜20モル、とくに2.5〜10モルとなる割合で使用するのが好ましい。   In the present invention, the 9,9-bis (cyanoalkyl) fluorene compound is hydrogenated in an alcohol containing ammonia in the presence of a sponge cobalt catalyst to give a corresponding 9,9-bis (aminoalkyl) fluorene compound. Is to be manufactured. Examples of the alcohol that can be used as the solvent include methanol, ethanol, isopropanol, and n-propanol. Methanol is most preferable. The preferred amount of alcohol used is 0.5 to 20 parts by weight, preferably 1 to 10 parts by weight, particularly preferably 2 to 8 parts by weight, based on 1 part by weight of the 9,9-bis (cyanoalkyl) fluorene compound. is there. Ammonia is preferably used in a proportion of 2 to 20 mol, particularly 2.5 to 10 mol, per mol of 9,9-bis (cyanoalkyl) fluorene compound.

本発明において触媒として使用されるスポンジコバルト触媒は、コバルトと、溶出される金属、例えばアルミニウム、珪素、亜鉛、錫等との合金から、侵食剤例えばアルカリ、酸などによって溶出される金属を溶出させて得られるスポンジ状形態の活性コバルトを主成分とする触媒である。スポンジコバルト触媒は、9,9−ビス(シアノアルキル)フルオレン化合物1質量部に対し、0.01〜0.5質量部、好ましくは0.05〜0.4質量部、とくに好ましくは0.1〜0.3質量部となる割合で使用するのが好ましい。   The sponge cobalt catalyst used as a catalyst in the present invention elutes metal eluted by an erodant such as an alkali or acid from an alloy of cobalt and an eluted metal such as aluminum, silicon, zinc or tin. The catalyst is mainly composed of sponge-like active cobalt. The sponge cobalt catalyst is 0.01 to 0.5 parts by weight, preferably 0.05 to 0.4 parts by weight, particularly preferably 0.1 to 1 part by weight of the 9,9-bis (cyanoalkyl) fluorene compound. It is preferable to use it at a ratio of ~ 0.3 parts by mass.

9,9−ビス(シアノアルキル)フルオレン化合物の水素化反応は、種々の方法によって行うことができる。例えば、耐圧反応釜に、アルコール、アンモニア、スポンジコバルト触媒及び9,9−ビス(シアノアルキル)フルオレン化合物を仕込み、所定温度まで昇温後、水素を導入することによって行うことができる。水素化は、通常、70〜150℃、好ましくは90〜130℃の温度で行われる。反応温度が低すぎると充分な反応速度を得ることができず、また反応温度が高くなり過ぎると、副反応や分解反応を伴いやすくなり、収率が低下する傾向が見られる。また反応圧力は、水素分圧で、通常、0.5〜30MPa、好ましくは2〜20MPaである。反応時間は、触媒の使用量や反応温度、その他反応条件によっても異なるが、通常、0.5〜30時間、工業的観点からは1〜20時間の範囲であり、このような反応時間で反応が完結するように反応条件の設定をすることが好ましい。   The hydrogenation reaction of the 9,9-bis (cyanoalkyl) fluorene compound can be performed by various methods. For example, it can be carried out by charging alcohol, ammonia, a sponge cobalt catalyst and a 9,9-bis (cyanoalkyl) fluorene compound into a pressure-resistant reaction kettle, raising the temperature to a predetermined temperature, and then introducing hydrogen. The hydrogenation is usually performed at a temperature of 70 to 150 ° C, preferably 90 to 130 ° C. If the reaction temperature is too low, a sufficient reaction rate cannot be obtained, and if the reaction temperature is too high, side reactions and decomposition reactions tend to occur and the yield tends to decrease. The reaction pressure is a hydrogen partial pressure and is usually 0.5 to 30 MPa, preferably 2 to 20 MPa. The reaction time varies depending on the amount of catalyst used, the reaction temperature, and other reaction conditions, but is usually 0.5 to 30 hours, and 1 to 20 hours from an industrial point of view. It is preferable to set reaction conditions so that is completed.

反応終了後は、常法によって目的とする9,9−ビス(アミノアルキル)フルオレン化合物を単離することができる。例えば、反応液を冷却後、反応釜から取り出し、濾別によってスポンジコバルト触媒を除き、濾液を濃縮してアンモニアや溶媒のアルコールを回収すると共に、残渣として粗製の9,9−ビス(アミノアルキル)フルオレン化合物を単離することができる。必要に応じ、これを蒸留、晶析、再結晶などに付することによって精製することができる。   After completion of the reaction, the desired 9,9-bis (aminoalkyl) fluorene compound can be isolated by a conventional method. For example, after cooling the reaction solution, it is removed from the reaction kettle, the sponge cobalt catalyst is removed by filtration, the filtrate is concentrated to recover ammonia and alcohol as a solvent, and crude 9,9-bis (aminoalkyl) as a residue. Fluorene compounds can be isolated. If necessary, it can be purified by subjecting it to distillation, crystallization, recrystallization and the like.

以下、実施例により本発明をさらに詳細に説明する。尚、実施例及び比較例における分析は、下記条件の高速液体クロマトグラフィにより実施した。
測定条件
機器:日本分光800
カラム:Inertsil ODS−2 長さ150mm、内径4.6mm
分析サンプル調製法:約50mgを50mlのジクロロメタンに溶解
注入量:5μL
溶離液:グラジエント分析
(メタノール10%+0.1%リン酸水溶液90%)5分保持
15分かけて
(メタノール45%+0.1%リン酸水溶液55%)
10分かけて
(メタノール80%+0.1%リン酸水溶液20%)
流量:1ml/分
検出器:UV(254nm)
定量法:絶対検量線法
Hereinafter, the present invention will be described in more detail with reference to examples. In addition, the analysis in an Example and a comparative example was implemented by the high performance liquid chromatography of the following conditions.
Measurement conditions Equipment: JASCO 800
Column: Inertsil ODS-2 150 mm long, 4.6 mm inner diameter
Analytical sample preparation method: about 50 mg dissolved in 50 ml of dichloromethane Injection volume: 5 μL
Eluent: Gradient analysis
(Methanol 10% + 0.1% phosphoric acid aqueous solution 90%) Hold for 5 minutes
Take 15 minutes
(Methanol 45% + 0.1% phosphoric acid aqueous solution 55%)
Take 10 minutes
(Methanol 80% + 0.1% phosphoric acid aqueous solution 20%)
Flow rate: 1 ml / min Detector: UV (254 nm)
Quantitative method: Absolute calibration curve method

[実施例1]
1リットルのオートクレーブに、9,9−ビス(2−シアノエチル)フルオレン69.5g、スポンジコバルト触媒14.1g及び14%アンモニア含有メタノール513.6gを仕込み(アンモニア/ニトリル(モル比)=16.6/1)、水素ガスで置換した後、120℃に昇温し、水素圧11.0MPaで、水素吸収が認められなくなるまで3.0時間保持した。その後反応液を冷却し、触媒を濾別した。エバポレーターにて濾液からメタノール及びアンモニアを留去し、粗製9,9−ビス(3−アミノプロピル)フルオレン84.4gを得た。メタノールを除いて求めたガスクロマトグラフィ面積百分率法による純度は98.7%であった。高速液体クロマトグラフィにより、9,9−ビス(3−アミノプロピル)フルオレン含量を求めて収率を算出したところ、94.5モル%であった。
[Example 1]
A 1 liter autoclave was charged with 69.5 g of 9,9-bis (2-cyanoethyl) fluorene, 14.1 g of a sponge cobalt catalyst and 513.6 g of methanol containing 14% ammonia (ammonia / nitrile (molar ratio) = 16.6). / 1) After replacing with hydrogen gas, the temperature was raised to 120 ° C., and the hydrogen pressure was 11.0 MPa, and maintained for 3.0 hours until no hydrogen absorption was observed. Thereafter, the reaction solution was cooled, and the catalyst was filtered off. Methanol and ammonia were distilled off from the filtrate with an evaporator to obtain 84.4 g of crude 9,9-bis (3-aminopropyl) fluorene. The purity determined by gas chromatography area percentage method excluding methanol was 98.7%. When the 9,9-bis (3-aminopropyl) fluorene content was determined by high performance liquid chromatography and the yield was calculated, it was 94.5 mol%.

[比較例1]
0.5リットルのオートクレーブに、9,9−ビス(2−シアノエチル)フルオレン5.4g、スポンジニッケル触媒4.5g及びエタノール110.0gを仕込み、水素ガスで置換した後、110℃に昇温し、水素圧11.0MPaで、水素吸収が認められなくなるまで9.0時間保持した。その後反応液を冷却し、触媒を濾別した。エバポレーターにて濾液からエタノールを留去し、粗製9,9−ビス(3−アミノプロピル)フルオレンを得た。エタノールを除いて求めたガスクロマトグラフィ面積百分率法による純度は53.8%であり、片方のニトリル基のみが水素化されたモノアミノモノニトリル体が19.1%残存していた。
[Comparative Example 1]
In a 0.5 liter autoclave, 5.4 g of 9,9-bis (2-cyanoethyl) fluorene, 4.5 g of sponge nickel catalyst and 110.0 g of ethanol were charged, and replaced with hydrogen gas. At a hydrogen pressure of 11.0 MPa, the mixture was held for 9.0 hours until no hydrogen absorption was observed. Thereafter, the reaction solution was cooled, and the catalyst was filtered off. Ethanol was distilled off from the filtrate with an evaporator to obtain crude 9,9-bis (3-aminopropyl) fluorene. The purity determined by gas chromatography area percentage method excluding ethanol was 53.8%, and 19.1% of a monoaminomononitrile body in which only one nitrile group was hydrogenated remained.

[比較例2]
0.2リットルのオートクレーブに、9,9−ビス(2−シアノエチル)フルオレン5.0g、スポンジニッケル触媒1.1g及び14%アンモニア含有メタノール51.0gを仕込み、水素ガスで置換した後、70℃に昇温し、水素圧10.0MPaで、水素吸収が認められなくなるまで4.0時間保持した。その後反応液を冷却し、触媒を濾別した。エバポレーターにて濾液からメタノール及びアンモニアを留去し、粗製9,9−ビス(3−アミノプロピル)フルオレンを得た。メタノールを除いて求めたガスクロマトグラフィ面積百分率法による純度は43.1%であり、片方のニトリル基のみが水素化されたモノアミノモノニトリル体が43.7%残存していた。

[Comparative Example 2]
A 0.2 liter autoclave was charged with 5.0 g of 9,9-bis (2-cyanoethyl) fluorene, 1.1 g of sponge nickel catalyst and 51.0 g of methanol containing 14% ammonia, and replaced with hydrogen gas. The hydrogen temperature was maintained at 4.0 MPa until the hydrogen absorption was not observed at a hydrogen pressure of 10.0 MPa. Thereafter, the reaction solution was cooled, and the catalyst was filtered off. Methanol and ammonia were distilled off from the filtrate with an evaporator to obtain crude 9,9-bis (3-aminopropyl) fluorene. The purity by gas chromatography area percentage method obtained by removing methanol was 43.1%, and 43.7% of a monoaminomononitrile body in which only one nitrile group was hydrogenated remained.

Claims (1)

下記一般式(1)
Figure 0004963033
(式中、Rは、炭素数1〜4のアルキレン基、Xは水素、ハロゲン、炭素数1〜4のアルキル基又は炭素数1〜3のアルコキシ基を表す)で示される9,9−ビス(シアノアルキル)フルオレン化合物と、アンモニアを含有するアルコール溶媒およびスポンジコバルト触媒とを仕込んだ後、接触水素化することを特徴とする、下記一般式(2)
Figure 0004963033
(式中、R及びXは上記と同じ)で表される9,9−ビス(アミノアルキル)フルオレン化合物の製造方法。
The following general formula (1)
Figure 0004963033
(Wherein, R represents an alkylene group having 1 to 4 carbon atoms, X represents hydrogen, halogen, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 3 carbon atoms) They were charged and (cyanoalkyl) fluorene compound, an alcohol solvent and a sponge cobalt catalyst containing ammonia, characterized by catalytic hydrogenation, the following general formula (2)
Figure 0004963033
(Wherein R and X are the same as above), a method for producing a 9,9-bis (aminoalkyl) fluorene compound.
JP2006079769A 2006-03-22 2006-03-22 Method for producing 9,9-bis (aminoalkyl) fluorene compound Expired - Fee Related JP4963033B2 (en)

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