JP2014105227A - Method for producing fluorine-containing compound having acid fluoride group at terminal position - Google Patents

Method for producing fluorine-containing compound having acid fluoride group at terminal position Download PDF

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JP2014105227A
JP2014105227A JP2012257075A JP2012257075A JP2014105227A JP 2014105227 A JP2014105227 A JP 2014105227A JP 2012257075 A JP2012257075 A JP 2012257075A JP 2012257075 A JP2012257075 A JP 2012257075A JP 2014105227 A JP2014105227 A JP 2014105227A
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JP5983351B2 (en
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Takashi Matsuda
高至 松田
Noriyuki Koike
則之 小池
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Shin Etsu Chemical Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a fluorine-containing compound having an acid fluoride group at the terminal position easily with high yield.SOLUTION: There is provided a method for producing a fluorine-containing compound having an acid fluoride group at the terminal position by reacting one or two or more fluorine-containing compounds having a carboxylic acid group at the terminal position represented by the following formula (1) (where, Rf represents a perfluoroalkyl group or a perfluoroalkylene group; n is 1 or 2; a, b, c and d are an integer of 0 or 1; a+b+d is 1 or more) with an alkali metal or an alkali metal compound to form a carboxylate and followed by heating at 100°C or more to carry out a thermal decomposition reaction.

Description

本発明は、末端にカルボン酸基を有する含フッ素化合物から、簡便且つ高収率で末端に酸フロライド基を有する含フッ素化合物を製造する方法に関する。   The present invention relates to a method for producing a fluorine-containing compound having an acid fluoride group at a terminal in a simple and high yield from a fluorine-containing compound having a carboxylic acid group at a terminal.

従来、カルボン酸基から酸フロライド基を誘導する方法として、いくつかの方法が開示されている。例えば、塩化チオニルと反応させて酸クロライド基を合成し、続いてフッ化セシウムと反応させて酸フロライド基に誘導する方法、4フッ化硫黄を250℃の高温で反応させて酸フロライド基に誘導する方法、チタン化合物を触媒としてトリフルオロベンゼンを作用させて酸フロライド基に誘導する方法、石川試薬を用いて酸フロライド基に誘導する方法が知られている。
Wang Chia−Lin J., Organic Reactions, Vol. 34, 1985(非特許文献1)
Schwertfeger W., Siegemund G., Journal of Fluorine Chemistry, Vol. 36, P237−246, 1987(非特許文献2)
Cox Daryl G., Sprague Lee G., Burton Donald J., Journal of Fluorine Chemistry, Vol. 23, P383−388, 1983(非特許文献3)
Conventionally, several methods have been disclosed as methods for deriving an acid fluoride group from a carboxylic acid group. For example, a method of synthesizing an acid chloride group by reacting with thionyl chloride, followed by reacting with cesium fluoride to derive an acid fluoride group, and reacting with sulfur tetrafluoride at a high temperature of 250 ° C. to induce an acid fluoride group There are known a method for deriving an acid fluoride group by using trifluorobenzene with a titanium compound as a catalyst, and a method for deriving an acid fluoride group using an Ishikawa reagent.
Wang Chia-Lin J. et al. , Organic Reactions, Vol. 34, 1985 (Non-Patent Document 1)
Schwertfeger W.W. , Siegemund G. , Journal of Fluorine Chemistry, Vol. 36, P237-246, 1987 (non-patent document 2)
Cox Daryl G. Sprague Lee G. Burton Donald J .; , Journal of Fluorine Chemistry, Vol. 23, P383-388, 1983 (non-patent document 3)

これら方法は合成に際して活性の高い化合物を使用するため、取扱に注意を要するものが多い。また、高価な試薬を使用する割に収率が90%に達しないものもある。
蒸留により単離できるような低分子量の化合物であれば、前記方法でも問題はないが、蒸留単離が難しいポリマー状化合物の末端基変性の場合、定量的に反応すること、及び反応後に目的物を容易に精製・単離できることが重要である。
Since these methods use highly active compounds in the synthesis, many of them require careful handling. In addition, there is a case where the yield does not reach 90% for using an expensive reagent.
As long as it is a low molecular weight compound that can be isolated by distillation, there is no problem with the above method, but in the case of modification of the end group of a polymer compound that is difficult to isolate by distillation, it reacts quantitatively, and the target product after the reaction. It is important that can be easily purified and isolated.

Wang Chia−Lin J., Organic Reactions, Vol. 34, 1985Wang Chia-Lin J. et al. , Organic Reactions, Vol. 34, 1985 Schwertfeger W., Siegemund G., Journal of Fluorine Chemistry, Vol. 36, P237−246, 1987Schwertfeger W.W. , Siegemund G. , Journal of Fluorine Chemistry, Vol. 36, P237-246, 1987 Cox Daryl G., Sprague Lee G., Burton Donald J., Journal of Fluorine Chemistry, Vol. 23, P383−388, 1983Cox Daryl G. Sprague Lee G. Burton Donald J .; , Journal of Fluorine Chemistry, Vol. 23, P383-388, 1983

本発明は、上記事情に鑑みなされたもので、簡便且つ高収率で得られる末端に酸フロライド基を有する含フッ素化合物の製造方法を提供することを目的とする。   This invention is made | formed in view of the said situation, and it aims at providing the manufacturing method of the fluorine-containing compound which has an acid fluoride group in the terminal obtained simply and with a high yield.

本発明者らは、上記目的を達成するために鋭意検討を重ねた結果、下記一般式(1)で表される末端にカルボン酸基を有する含フッ素化合物の1種又は2種以上に、アルカリ金属又はアルカリ金属化合物を作用させてカルボン酸塩を形成させた後、100℃以上に加熱して熱分解反応させることにより、簡便且つ高収率に下記一般式(2)で表される末端に酸フロライド基を有する含フッ素化合物を製造し得ることを見出し、本発明をなすに至った。   As a result of intensive studies in order to achieve the above object, the present inventors have found that one or more of the fluorine-containing compounds having a carboxylic acid group at the terminal represented by the following general formula (1) have an alkali After forming a carboxylate by allowing a metal or alkali metal compound to act, it is heated to 100 ° C. or higher and subjected to a thermal decomposition reaction, so that the terminal represented by the following general formula (2) can be easily and highly yielded. It has been found that a fluorine-containing compound having an acid fluoride group can be produced, and has led to the present invention.

従って、本発明は、下記に示す末端に酸フロライド基を有する含フッ素化合物の製造方法を提供する。
〔1〕
下記一般式(1)

Figure 2014105227
(式中、Rfは炭素数1〜10のパーフルオロアルキル基又はパーフルオロアルキレン基を表し、nは1又は2である。a、b、c、dはそれぞれ独立して0又は1以上の整数を表し、a+b+dは1以上である。a、b、c、dでくくられた各繰り返し単位の存在順序は式中において限定されない。)
で表される末端にカルボン酸基を有する含フッ素化合物の1種又は2種以上に、アルカリ金属又はアルカリ金属化合物を作用させてカルボン酸塩を形成させた後、100℃以上に加熱して熱分解反応させることにより下記一般式(2)
Figure 2014105227
(式中、Rfは炭素数1〜10のパーフルオロアルキル基又はパーフルオロアルキレン基を表し、XはF又はCF3であり、nは1又は2である。e、f、g、hはそれぞれ独立して0又は1以上の整数を表し、iは0又は1である。e、f、g、hでくくられた各繰り返し単位の存在順序は式中において限定されない。)
で表される末端に酸フロライド基を有する含フッ素化合物を製造する方法。
〔2〕
アルカリ金属、アルカリ金属化合物が、アルカリ金属単体、又はアルカリ金属の水素化物、水酸化物、炭酸塩、炭酸水素塩、酸化物もしくはハロゲン化物である〔1〕に記載の製造方法。
〔3〕
アルカリ金属が、カリウム、ルビジウム及びセシウムのいずれかである〔2〕に記載の製造方法。
〔4〕
アルカリ金属化合物が、炭酸セシウムである〔3〕に記載の製造方法。
〔5〕
更に、熱分解反応後、クロロシラン化合物を添加してアルカリ金属を塩化物として分離し、目的化合物を回収する〔1〕〜〔4〕のいずれかに記載の製造方法。 Therefore, this invention provides the manufacturing method of the fluorine-containing compound which has an acid fluoride group in the terminal shown below.
[1]
The following general formula (1)
Figure 2014105227
(In the formula, Rf represents a C 1-10 perfluoroalkyl group or a perfluoroalkylene group, and n is 1 or 2. a, b, c, and d are each independently 0 or an integer of 1 or more. A + b + d is 1 or more.The order of existence of each repeating unit enclosed by a, b, c, d is not limited in the formula.)
After forming a carboxylate by reacting an alkali metal or an alkali metal compound with one or more of the fluorine-containing compounds having a carboxylic acid group at the terminal represented by By the decomposition reaction, the following general formula (2)
Figure 2014105227
(In the formula, Rf represents a perfluoroalkyl group or perfluoroalkylene group having 1 to 10 carbon atoms, X is F or CF 3 , and n is 1 or 2. e, f, g, and h are respectively Independently represents 0 or an integer of 1 or more, and i is 0 or 1. The order of presence of each repeating unit delimited by e, f, g, and h is not limited in the formula.
A method for producing a fluorine-containing compound having an acid fluoride group at a terminal represented by the formula:
[2]
[1] The production method according to [1], wherein the alkali metal or alkali metal compound is a simple alkali metal, or an alkali metal hydride, hydroxide, carbonate, bicarbonate, oxide or halide.
[3]
[2] The production method according to [2], wherein the alkali metal is any one of potassium, rubidium and cesium.
[4]
The method according to [3], wherein the alkali metal compound is cesium carbonate.
[5]
Furthermore, after the thermal decomposition reaction, the chlorosilane compound is added to separate the alkali metal as a chloride, and the target compound is recovered, [1] to [4].

本発明の製造方法によれば、末端にカルボン酸基を有する含フッ素化合物から末端に酸フロライド基を有する含フッ素化合物を、簡便な操作で、且つ高収率で得ることができる。また、反応後の精製・単離も容易である。   According to the production method of the present invention, a fluorine-containing compound having an acid fluoride group at its terminal can be obtained in a high yield from a fluorine-containing compound having a carboxylic acid group at its terminal by a simple operation. In addition, purification and isolation after the reaction is easy.

本発明の製造方法は、下記一般式(1)

Figure 2014105227
(式中、Rfは炭素数1〜10のパーフルオロアルキル基又はパーフルオロアルキレン基を表し、nは1又は2である。a、b、c、dはそれぞれ独立して0又は1以上の整数を表し、a+b+dは1以上である。a、b、c、dでくくられた各繰り返し単位の存在順序は式中において限定されない。)
で表される末端にカルボン酸基を有する含フッ素化合物の1種又は2種以上に、アルカリ金属又はアルカリ金属化合物を作用させてカルボン酸塩を形成させた後、100℃以上に加熱して熱分解反応させることにより下記一般式(2)
Figure 2014105227
(式中、Rfは炭素数1〜10のパーフルオロアルキル基又はパーフルオロアルキレン基を表し、XはF又はCF3であり、nは1又は2である。e、f、g、hはそれぞれ独立して0又は1以上の整数を表し、iは0又は1である。e、f、g、hでくくられた各繰り返し単位の存在順序は式中において限定されない。)
で示される末端に酸フロライド基を有する含フッ素化合物を得ることができる。 The production method of the present invention comprises the following general formula (1)
Figure 2014105227
(In the formula, Rf represents a C 1-10 perfluoroalkyl group or a perfluoroalkylene group, and n is 1 or 2. a, b, c, and d are each independently 0 or an integer of 1 or more. A + b + d is 1 or more.The order of existence of each repeating unit enclosed by a, b, c, d is not limited in the formula.)
After forming a carboxylate by reacting an alkali metal or an alkali metal compound with one or more of the fluorine-containing compounds having a carboxylic acid group at the terminal represented by By the decomposition reaction, the following general formula (2)
Figure 2014105227
(In the formula, Rf represents a perfluoroalkyl group or perfluoroalkylene group having 1 to 10 carbon atoms, X is F or CF 3 , and n is 1 or 2. e, f, g, and h are respectively Independently represents 0 or an integer of 1 or more, and i is 0 or 1. The order of presence of each repeating unit delimited by e, f, g, and h is not limited in the formula.
A fluorine-containing compound having an acid fluoride group at the terminal represented by can be obtained.

本発明の製造方法において、反応の第一段階は、下記一般式(1)

Figure 2014105227
(式中、Rfは炭素数1〜10のパーフルオロアルキル基又はパーフルオロアルキレン基を表し、nは1又は2である。a、b、c、dはそれぞれ独立して0又は1以上の整数、好ましくは0〜100であり、a+b+dは1以上、好ましくは5〜150である。a、b、c、dでくくられた各繰り返し単位の存在順序は式中において限定されない。)
で表される末端にカルボン酸基を有する含フッ素化合物の1種又は2種以上に、アルカリ金属又はアルカリ金属化合物を作用させてカルボン酸塩を形成させるものである。上記反応は、上記含フッ素化合物中のカルボン酸基に対し、十分な量のアルカリ金属又はアルカリ金属化合物を加えて反応させればよい。炭酸塩のように反応性が低い化合物の場合は、50〜150℃に加熱することにより、塩を形成させることができる。 In the production method of the present invention, the first stage of the reaction is represented by the following general formula (1)
Figure 2014105227
(In the formula, Rf represents a C 1-10 perfluoroalkyl group or a perfluoroalkylene group, and n is 1 or 2. a, b, c, and d are each independently 0 or an integer of 1 or more. And preferably 0 to 100, and a + b + d is 1 or more, preferably 5 to 150. The order of presence of each repeating unit enclosed by a, b, c and d is not limited in the formula.
A carboxylate is formed by allowing an alkali metal or an alkali metal compound to act on one or more of the fluorine-containing compounds having a carboxylic acid group at the terminal represented by the formula (1). The reaction may be performed by adding a sufficient amount of an alkali metal or an alkali metal compound to the carboxylic acid group in the fluorine-containing compound. In the case of a compound having low reactivity such as carbonate, a salt can be formed by heating to 50 to 150 ° C.

上記式(1)中、Rfは炭素数1〜10のパーフルオロアルキル基又はパーフルオロアルキレン基であり、例えば下記一般式で表されるもの等を挙げることができる。
j2j+1
−Cj2j
(式中、jは1〜10の整数、好ましくは1〜6の整数である。)
In said formula (1), Rf is a C1-C10 perfluoroalkyl group or a perfluoroalkylene group, for example, what is represented by the following general formula etc. can be mentioned.
C j F 2j + 1
−C j F 2j
(In the formula, j is an integer of 1 to 10, preferably an integer of 1 to 6.)

上記式(1)で表される含フッ素化合物の平均分子量は、500〜50,000であることが好ましく、より好ましくは1,000〜25,000である。また、上記式(1)で表される含フッ素化合物のカルボン酸基の濃度としては、上記式(1)において、n=1の場合、0.002〜0.2mol/100gであることが好ましく、より好ましくは0.004〜0.1mol/100gであり、上記式(1)において、n=2の場合、0.004〜0.4mol/100gであることが好ましく、より好ましくは0.008〜0.2mol/100gである。
上記式(1)で表されるカルボン酸基を有する含フッ素化合物は、1種単独で用いても2種以上を併用してもよい。
The average molecular weight of the fluorine-containing compound represented by the above formula (1) is preferably 500 to 50,000, more preferably 1,000 to 25,000. In addition, the concentration of the carboxylic acid group of the fluorine-containing compound represented by the above formula (1) is preferably 0.002 to 0.2 mol / 100 g when n = 1 in the above formula (1). More preferably, it is 0.004 to 0.1 mol / 100 g. In the above formula (1), when n = 2, it is preferably 0.004 to 0.4 mol / 100 g, more preferably 0.008. -0.2 mol / 100g.
The fluorine-containing compound having a carboxylic acid group represented by the above formula (1) may be used alone or in combination of two or more.

アルカリ金属、アルカリ金属化合物としては特に制限がなく、アルカリ金属単体、又はアルカリ金属の水素化物、水酸化物、炭酸塩、炭酸水素塩、酸化物もしくはハロゲン化物等、いずれの化合物でも構わないが、塩基性の強さの観点から、アルカリ金属として、カリウム、ルビジウム、セシウムが好ましく、特にはセシウムの化合物が最も好ましい。セシウム化合物の中でも、取扱いの容易さの観点から、炭酸セシウムが特に好ましい。   There are no particular restrictions on the alkali metal or alkali metal compound, and any alkali metal alone or alkali metal hydride, hydroxide, carbonate, bicarbonate, oxide or halide may be used. From the viewpoint of basic strength, potassium, rubidium, and cesium are preferable as the alkali metal, and a cesium compound is particularly preferable. Among the cesium compounds, cesium carbonate is particularly preferable from the viewpoint of easy handling.

アルカリ金属又はアルカリ金属化合物の使用量は、末端にカルボン酸基を有する含フッ素化合物のカルボン酸基に対して0.1〜5.0当量であることが好ましく、特に0.2〜3.0当量であることが好ましい。アルカリ金属又はアルカリ金属化合物の使用量が少なすぎると反応不足により未反応物が残存し、収率が低くなる場合があり、多すぎると反応後、アルカリ金属塩のろ過に時間がかかる場合があり、更に過剰の反応化合物の使用は甚だ不経済である。   It is preferable that the usage-amount of an alkali metal or an alkali metal compound is 0.1-5.0 equivalent with respect to the carboxylic acid group of the fluorine-containing compound which has a carboxylic acid group at the terminal, Especially 0.2-3.0. It is preferable that it is equivalent. If the amount of alkali metal or alkali metal compound used is too small, unreacted substances may remain due to insufficient reaction, resulting in a low yield. If too large, it may take time to filter the alkali metal salt after the reaction. Furthermore, the use of an excess of reaction compound is very uneconomical.

本発明の製造方法において、反応の第2段階は、カルボン酸塩の熱分解である。アルカリ金属の種類によって異なるが、100℃以上、好ましくは100〜300℃に加熱することによって、二酸化炭素が脱離(脱CO2)し、最終的に下記一般式(2)

Figure 2014105227
(式中、Rfは炭素数1〜10のパーフルオロアルキル基又はパーフルオロアルキレン基を表し、上記式(1)で例示したものと同様のものを例示することができる。XはF又はCF3であり、nは1又は2である。e、f、g、hはそれぞれ独立して0又は1以上の整数、好ましくは0〜100であり、iは0又は1である。e、f、g、hでくくられた各繰り返し単位の存在順序は式中において限定されない。)
で表される末端に酸フロライド基を有する含フッ素化合物が得られる。 In the production method of the present invention, the second stage of the reaction is thermal decomposition of the carboxylate. Although it depends on the type of alkali metal, carbon dioxide is desorbed (de-CO 2 ) by heating to 100 ° C. or higher, preferably 100 to 300 ° C., and finally the following general formula (2)
Figure 2014105227
(In the formula, Rf represents a perfluoroalkyl group or a perfluoroalkylene group having 1 to 10 carbon atoms, and examples thereof are the same as those exemplified in the above formula (1). X is F or CF 3. And n is 1 or 2. e, f, g, and h are each independently 0 or an integer of 1 or more, preferably 0 to 100, and i is 0 or 1. e, f, (The order of existence of each repeating unit enclosed by g and h is not limited in the formula.)
The fluorine-containing compound which has an acid fluoride group at the terminal represented by this is obtained.

反応にあたっての注意としては、反応系内に水分が存在すると、酸フロライド基とただちに反応してカルボン酸基を生成し、収率低下を招く。従って、反応系内は乾燥した不活性ガスを0.1〜10L/分程度の一定流量で不活性ガスを流しておくことが望ましい。   As a precaution in the reaction, if water is present in the reaction system, it reacts immediately with the acid fluoride group to produce a carboxylic acid group, resulting in a decrease in yield. Therefore, it is desirable to flow the inert gas at a constant flow rate of about 0.1 to 10 L / min in the reaction system.

反応に際し、溶剤を添加してもよい。カルボン酸塩を形成すると粘度が上昇する場合が多いので、適度に溶剤で希釈することにより粘度を低下させることができ、撹拌をスムーズに行うことができる。溶剤は反応に影響を与えるものでなければ如何なるものでもよいが、反応化合物がフッ素化合物であるので、フッ素系溶剤を用いるのがよい。フッ素系溶剤としては、1,3−ビストリフルオロベンゼン、トリフルオロベンゼン、3M社から販売されているHFE系溶剤(NOVECシリーズ)、3M社から販売されているパーフルオロ系溶剤(フロリナートシリーズ)などが挙げられる。   In the reaction, a solvent may be added. Since the viscosity often increases when the carboxylate is formed, the viscosity can be lowered by appropriately diluting with a solvent, and stirring can be performed smoothly. Any solvent may be used as long as it does not affect the reaction. However, since the reaction compound is a fluorine compound, it is preferable to use a fluorine-based solvent. Examples of fluorine-based solvents include 1,3-bistrifluorobenzene, trifluorobenzene, HFE solvents sold by 3M (NOVEC series), and perfluoro solvents (Fluorinert series) sold by 3M. Can be mentioned.

溶剤の添加量は、末端にカルボン酸基を有する含フッ素化合物100質量部に対して0〜500質量部であることが好ましく、特に50〜200質量部であることが好ましい。上記のように、反応系の粘度に応じて、溶剤の使用の有無及び使用量を調整すればよいが、溶剤が多すぎると反応の進行が遅くなったり、ポットイールドの低下を招く場合がある。   The amount of the solvent added is preferably 0 to 500 parts by mass, particularly preferably 50 to 200 parts by mass with respect to 100 parts by mass of the fluorine-containing compound having a carboxylic acid group at the terminal. As described above, depending on the viscosity of the reaction system, the presence / absence and use amount of the solvent may be adjusted. However, if the amount of the solvent is excessive, the progress of the reaction may be delayed or the pot yield may be reduced. .

上述の操作によって目的物の末端に酸フロライド基を有する含フッ素化合物が製造できるが、きれいに単離するために、冷却後、クロロシラン化合物を添加するとよい。これにより、アルカリ金属が塩化物を形成し、目的物とアルカリ金属を容易に分離することができる。使用するクロロシラン化合物としては、メチルジクロロシラン、ジメチルジクロロシラン、トリメチルクロロシラン、メチルトリクロロシランなどが例示される。クロロシラン化合物を使用する場合の添加量としては、含フッ素化合物のカルボン酸基に対して、0.1〜10倍当量であることが好ましく、より好ましくは0.2〜5倍当量である。少なすぎると、目的物の収率が低下する場合があり、多すぎる場合は、反応に対する影響はないものの、ポットイールドが低下するおそれがある。   Although a fluorine-containing compound having an acid fluoride group at the end of the target product can be produced by the above-described operation, a chlorosilane compound may be added after cooling in order to isolate it cleanly. Thereby, the alkali metal forms a chloride, and the target product and the alkali metal can be easily separated. Examples of the chlorosilane compound used include methyldichlorosilane, dimethyldichlorosilane, trimethylchlorosilane, and methyltrichlorosilane. As the addition amount in the case of using a chlorosilane compound, it is preferable that it is 0.1-10 times equivalent with respect to the carboxylic acid group of a fluorine-containing compound, More preferably, it is 0.2-5 times equivalent. If the amount is too small, the yield of the target product may decrease. If the amount is too large, the reaction may not be affected, but the pot yield may decrease.

以下、実施例を示し、本発明を具体的に説明するが、本発明は下記の実施例に制限されるものではない。   EXAMPLES Hereinafter, although an Example is shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example.

[実施例1]
SUS(ステンレススチール)製の撹拌羽を付したSUS製の500mlフラスコに、下記平均組成式(1a)で示される末端にカルボン酸基を有する含フッ素化合物(平均分子量3,700、カルボン酸基濃度=0.026mol/100g)100g、炭酸セシウム5.1g、フロリナートFC−43(3M社製フッ素系溶剤)100gを仕込み、窒素ガスを200ml/分の流量で通気し、撹拌しながらオイルバスにて140℃で1時間加熱した。

Figure 2014105227
(c1/d1≒0.9、c1+d1≒38) [Example 1]
In a 500 ml flask made of SUS with a stirring blade made of SUS (stainless steel), a fluorine-containing compound having a carboxylic acid group at the end represented by the following average composition formula (1a) (average molecular weight 3,700, carboxylic acid group concentration) = 0.026 mol / 100 g) 100 g, cesium carbonate 5.1 g, and Fluorinert FC-43 (fluorine solvent manufactured by 3M Company) 100 g were charged, nitrogen gas was aerated at a flow rate of 200 ml / min, and stirred in an oil bath. Heated at 140 ° C. for 1 hour.
Figure 2014105227
(C1 / d1≈0.9, c1 + d1≈38)

続いて170℃で2時間加熱した後、室温まで冷却し、トリメチルクロロシラン4.2gを加えた。反応液をPTFE(ポリテトラフルオロエチレン)系フィルター(ポアサイズ0.5μm)でろ過し、150℃/0.4kPaの条件でロータリーエバポレーターを用いて低沸成分を留去し、炭黄色透明なオイル状液体97gを得た。得られた液体の19F−NMR、IRを測定した結果、下記式(2a)で示される末端に酸フロライド基を有する化合物であることを確認した。また、トリフルオロベンゼンを内標として、19F−NMRにて酸フロライド基の濃度を測定したところ、酸フロライド基濃度=0.026mol/100gであり、ほぼ定量的に反応していることを確認した。

Figure 2014105227
(g1/h1≒0.9、g1+h1≒37) Subsequently, the mixture was heated at 170 ° C. for 2 hours, cooled to room temperature, and 4.2 g of trimethylchlorosilane was added. The reaction solution was filtered with a PTFE (polytetrafluoroethylene) filter (pore size 0.5 μm), and low boiling components were distilled off using a rotary evaporator under the conditions of 150 ° C./0.4 kPa. 97 g of liquid was obtained. As a result of measuring 19 F-NMR and IR of the obtained liquid, it was confirmed to be a compound having an acid fluoride group at the terminal represented by the following formula (2a). Moreover, when the concentration of the acid fluoride group was measured by 19 F-NMR using trifluorobenzene as an internal standard, it was confirmed that the acid fluoride group concentration was 0.026 mol / 100 g and the reaction was almost quantitative. did.
Figure 2014105227
(G1 / h1≈0.9, g1 + h1≈37)

19F−NMR
12.7ppm,12.9ppm、1F: −CO
−56.0ppm,−57.6ppm、3F: −C 3
−51.7ppm,−53.3ppm,−55.0ppm、約35F −OC 2O−
−88.7ppm,−90.3ppm、約78F −OC 2 2O−
19 F-NMR
12.7 ppm, 12.9 ppm, 1F: —CO 2 F
-56.0 ppm, -57.6 ppm, 3F: -C F 3
-51.7 ppm, -53.3 ppm, -55.0 ppm, about 35 F -OC F 2 O-
−88.7 ppm, −90.3 ppm, about 78 F— OC F 2 C F 2 O—

IR(特性吸収)
1,890cm-1: νC=O
1,000〜1,400cm-1: νC−F
IR (characteristic absorption)
1,890 cm −1 : νC═O
1,000 to 1,400 cm −1 : νC-F

[実施例2]
SUS製の撹拌羽を付したSUS製の500mlフラスコに、下記平均組成式(1b)で示される末端にカルボン酸基を有する含フッ素化合物(平均分子量4,100、カルボン酸基濃度=0.049mol/100g)100g、炭酸セシウム9.6g、フロリナートFC−43(3M社製フッ素系溶剤)100gを仕込み、窒素ガスを200ml/分の流量で通気し、撹拌しながらオイルバスにて140℃で1時間加熱した。

Figure 2014105227
(c2/d2≒0.9、c2+d2≒44) [Example 2]
In a SUS 500 ml flask equipped with a SUS stirring blade, a fluorine-containing compound having a carboxylic acid group at the terminal represented by the following average composition formula (1b) (average molecular weight 4,100, carboxylic acid group concentration = 0.049 mol) / 100 g) 100 g, cesium carbonate 9.6 g, and Fluorinert FC-43 (fluorine solvent manufactured by 3M) 100 g were charged, nitrogen gas was aerated at a flow rate of 200 ml / min, and 1 stir at 140 ° C. in an oil bath with stirring. Heated for hours.
Figure 2014105227
(C2 / d2≈0.9, c2 + d2≈44)

続いて170℃で2時間加熱した後、室温まで冷却し、トリメチルクロロシラン8.0gを加えた。反応液をPTFE系フィルター(ポアサイズ0.5μm)でろ過し、150℃/0.4kPaの条件でロータリーエバポレーターを用いて低沸成分を留去し、炭黄色透明なオイル状液体95gを得た。得られた液体の19F−NMR、IRを測定した結果、下記式(2b)で示される末端に酸フロライド基を有する化合物であることを確認した。また、トリフルオロベンゼンを内標として、19F−NMRにて酸フロライド基の濃度を測定したところ、酸フロライド基濃度=0.050mol/100gであり、ほぼ定量的に反応していることを確認した。

Figure 2014105227
(g2/h2≒0.9、g2+h2≒42) Then, after heating at 170 degreeC for 2 hours, it cooled to room temperature and added trimethylchlorosilane 8.0g. The reaction solution was filtered through a PTFE filter (pore size 0.5 μm), and low boiling components were distilled off using a rotary evaporator under the conditions of 150 ° C./0.4 kPa, thereby obtaining 95 g of a charcoal yellow transparent oily liquid. As a result of measuring 19 F-NMR and IR of the obtained liquid, it was confirmed to be a compound having an acid fluoride group at the terminal represented by the following formula (2b). Moreover, when the concentration of the acid fluoride group was measured by 19 F-NMR using trifluorobenzene as an internal standard, the acid fluoride group concentration was 0.050 mol / 100 g, and it was confirmed that the reaction was almost quantitative. did.
Figure 2014105227
(G2 / h2≈0.9, g2 + h2≈42)

19F−NMR
12.7ppm,12.9ppm、1F: −CO
−51.7ppm,−53.3ppm,−55.0ppm、約40F −OC 2O−
−88.7ppm,−90.3ppm、約88F −OC 2 2O−
19 F-NMR
12.7 ppm, 12.9 ppm, 1F: —CO 2 F
−51.7 ppm, −53.3 ppm, −55.0 ppm, about 40 F —OC F 2 O—
-88.7 ppm, -90.3 ppm, about 88 F -OC F 2 C F 2 O-

IR(特性吸収)
1,890cm-1: νC=O
1,000〜1,400cm-1: νC−F
IR (characteristic absorption)
1,890 cm −1 : νC═O
1,000 to 1,400 cm −1 : νC-F

Claims (5)

下記一般式(1)
Figure 2014105227
(式中、Rfは炭素数1〜10のパーフルオロアルキル基又はパーフルオロアルキレン基を表し、nは1又は2である。a、b、c、dはそれぞれ独立して0又は1以上の整数を表し、a+b+dは1以上である。a、b、c、dでくくられた各繰り返し単位の存在順序は式中において限定されない。)
で表される末端にカルボン酸基を有する含フッ素化合物の1種又は2種以上に、アルカリ金属又はアルカリ金属化合物を作用させてカルボン酸塩を形成させた後、100℃以上に加熱して熱分解反応させることにより下記一般式(2)
Figure 2014105227
(式中、Rfは炭素数1〜10のパーフルオロアルキル基又はパーフルオロアルキレン基を表し、XはF又はCF3であり、nは1又は2である。e、f、g、hはそれぞれ独立して0又は1以上の整数を表し、iは0又は1である。e、f、g、hでくくられた各繰り返し単位の存在順序は式中において限定されない。)
で表される末端に酸フロライド基を有する含フッ素化合物を製造する方法。
The following general formula (1)
Figure 2014105227
(In the formula, Rf represents a C 1-10 perfluoroalkyl group or a perfluoroalkylene group, and n is 1 or 2. a, b, c, and d are each independently 0 or an integer of 1 or more. A + b + d is 1 or more.The order of existence of each repeating unit enclosed by a, b, c, d is not limited in the formula.)
After forming a carboxylate by reacting an alkali metal or an alkali metal compound with one or more of the fluorine-containing compounds having a carboxylic acid group at the terminal represented by By the decomposition reaction, the following general formula (2)
Figure 2014105227
(In the formula, Rf represents a perfluoroalkyl group or perfluoroalkylene group having 1 to 10 carbon atoms, X is F or CF 3 , and n is 1 or 2. e, f, g, and h are respectively Independently represents 0 or an integer of 1 or more, and i is 0 or 1. The order of presence of each repeating unit delimited by e, f, g, and h is not limited in the formula.
A method for producing a fluorine-containing compound having an acid fluoride group at a terminal represented by the formula:
アルカリ金属、アルカリ金属化合物が、アルカリ金属単体、又はアルカリ金属の水素化物、水酸化物、炭酸塩、炭酸水素塩、酸化物もしくはハロゲン化物である請求項1に記載の製造方法。   The production method according to claim 1, wherein the alkali metal or alkali metal compound is an alkali metal alone, or an alkali metal hydride, hydroxide, carbonate, bicarbonate, oxide or halide. アルカリ金属が、カリウム、ルビジウム及びセシウムのいずれかである請求項2に記載の製造方法。   The production method according to claim 2, wherein the alkali metal is any one of potassium, rubidium, and cesium. アルカリ金属化合物が、炭酸セシウムである請求項3に記載の製造方法。   The production method according to claim 3, wherein the alkali metal compound is cesium carbonate. 更に、熱分解反応後、クロロシラン化合物を添加してアルカリ金属を塩化物として分離し、目的化合物を回収する請求項1〜4のいずれか1項記載の製造方法。   Furthermore, after a thermal decomposition reaction, a chlorosilane compound is added, an alkali metal is isolate | separated as a chloride, and the manufacturing method of any one of Claims 1-4 which collect | recovers the target compounds.
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JPS6466139A (en) * 1987-09-08 1989-03-13 Nippon Mektron Kk Production of perfluorocarboxylic acid fluoride
JP2000143552A (en) * 1998-11-04 2000-05-23 Daikin Ind Ltd Fluorinating agent and production of organofluorine compound
JP2001226481A (en) * 1999-12-06 2001-08-21 Shin Etsu Chem Co Ltd Method for producing hexafluoropropeneoxide polymer
JP2009001771A (en) * 2007-05-22 2009-01-08 Yunimatekku Kk Fluorine-containing polyether compound, method for producing the same and curable composition containing the same
JP2011508737A (en) * 2007-12-28 2011-03-17 ソルヴェイ・ソレクシス・エッセ・ピ・ア Addition reaction to fluoroallylfluorosulfate

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6466139A (en) * 1987-09-08 1989-03-13 Nippon Mektron Kk Production of perfluorocarboxylic acid fluoride
JP2000143552A (en) * 1998-11-04 2000-05-23 Daikin Ind Ltd Fluorinating agent and production of organofluorine compound
JP2001226481A (en) * 1999-12-06 2001-08-21 Shin Etsu Chem Co Ltd Method for producing hexafluoropropeneoxide polymer
JP2009001771A (en) * 2007-05-22 2009-01-08 Yunimatekku Kk Fluorine-containing polyether compound, method for producing the same and curable composition containing the same
JP2011508737A (en) * 2007-12-28 2011-03-17 ソルヴェイ・ソレクシス・エッセ・ピ・ア Addition reaction to fluoroallylfluorosulfate

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