JP2903494B2 - Method for producing fluorinated ether - Google Patents
Method for producing fluorinated etherInfo
- Publication number
- JP2903494B2 JP2903494B2 JP3992797A JP3992797A JP2903494B2 JP 2903494 B2 JP2903494 B2 JP 2903494B2 JP 3992797 A JP3992797 A JP 3992797A JP 3992797 A JP3992797 A JP 3992797A JP 2903494 B2 JP2903494 B2 JP 2903494B2
- Authority
- JP
- Japan
- Prior art keywords
- general formula
- represented
- present
- lower alkyl
- alkyl group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明はパーフルオロ−t−
ブチル基を有する含フッ素エーテルの製造方法に関する
ものである。TECHNICAL FIELD The present invention relates to a perfluoro-t-
The present invention relates to a method for producing a fluorinated ether having a butyl group.
【0002】[0002]
【従来の技術】パーフルオロ−t−ブチル基[(C
F3)3C−]を有する含フッ素エーテルの合成法として
は、(CF3)3COHgClとCH3Iとを反応させて
(CF3)3COCH3を合成する方法が知られている
(Journal of Fluorine Chem
istry,11(1978)327〜335)。しか
しながら、この方法は、水銀を用いることから、工業的
方法としては好ましいものではない。2. Description of the Related Art A perfluoro-t-butyl group [(C
As a method for synthesizing a fluorine-containing ether having (F 3 ) 3 C—], a method is known in which (CF 3 ) 3 COHgCl is reacted with CH 3 I to synthesize (CF 3 ) 3 COCH 3 ( Journal of Fluorine Chem
, 11 (1978) 327-335). However, this method is not preferable as an industrial method because it uses mercury.
【0003】[0003]
【発明が解決しようとする課題】本発明は、パーフルオ
ロ−t−ブチル基を有する含フッ素エーテルを効率よく
製造する方法を提供することをその課題とする。An object of the present invention is to provide a method for efficiently producing a fluorine-containing ether having a perfluoro-t-butyl group.
【0004】[0004]
【課題を解決するための手段】本発明者らは、前記課題
を解決すべく鋭意研究を重ねた結果、本発明を完成する
に至った。即ち、本発明によれば、下記一般式(1)Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have completed the present invention. That is, according to the present invention, the following general formula (1)
【化1】 (CF3)3C−O−R1 (1) (式中、R1は低級アルキル基を示す)で表される含フ
ッ素エーテルを製造する方法において、下記一般式
(2)Embedded image In a method for producing a fluorine-containing ether represented by (CF 3 ) 3 C—O—R 1 (1) (wherein R 1 represents a lower alkyl group), the following general formula (2)
【化2】 (CF3)3C−OM (2) (式中、Mはアルカリ金属を示す)で表されるアルコキ
シドを、非プロトン性溶媒中で、低級アルキル基Rを有
するアルキル化剤と反応させることを特徴とする前記の
方法が提供される。An alkoxide represented by (CF 3 ) 3 C-OM (2) (wherein M represents an alkali metal) is reacted with an alkylating agent having a lower alkyl group R in an aprotic solvent. The method is provided above, wherein the reacting is performed.
【0005】[0005]
【発明の実施の形態】本発明の製造目的化合物は、前記
一般式(1)で表されるパーフルオロ−t−ブチル基を
有する含フッ素エーテルである。この一般式(1)にお
いて、R1は低級アルキル基であり、その炭素数は6以
下、好ましくは1〜4である。R1の具体例としては、
CH3−、C2H5−、n−C3H7−、i−C3H7−、n
−C4H9−、i−C4H9−、t−C4H9−等が挙げられ
る。BEST MODE FOR CARRYING OUT THE INVENTION The production target compound of the present invention is a fluorine-containing ether having a perfluoro-t-butyl group represented by the aforementioned general formula (1). In the general formula (1), R 1 is a lower alkyl group having 6 or less carbon atoms, preferably 1-4. Specific examples of R 1 include:
CH 3 -, C 2 H 5 -, n-C 3 H 7 -, i-C 3 H 7 -, n
-C 4 H 9 -, i- C 4 H 9 -, t-C 4 H 9 - , and the like.
【0006】本発明においては、反応原料として前記一
般式(2)で表されるパーフルオロ−t−ブチルアルコ
キシドを用いる。この一般式(2)において、MはN
a、K、Li等のアルカリ金属を示す。本発明では、特
に、(CF3)3C−ONaの使用が好ましい。In the present invention, perfluoro-t-butyl alkoxide represented by the general formula (2) is used as a reaction raw material. In this general formula (2), M is N
a, K, and alkali metals such as Li. In the present invention, it is particularly preferable to use (CF 3 ) 3 C-ONa.
【0007】前記パーフルオロ−t−ブチルアルコキシ
ドは、パーフルオロ−t−ブチルアルコールとアルカリ
金属水酸化物とを反応させることにより得ることができ
る。この場合の反応は次式で表される。The above-mentioned perfluoro-t-butyl alkoxide can be obtained by reacting perfluoro-t-butyl alcohol with an alkali metal hydroxide. The reaction in this case is represented by the following equation.
【化5】 (式中、Mはアルカリ金属を示す)前記反応は−10〜
50℃、好ましくは−5〜5℃で実施される。反応溶媒
としては、MOHを溶解するものであれば任意のものが
使用可能であるが、通常は水が用いられる。Embedded image Wherein M represents an alkali metal.
It is carried out at 50C, preferably at -5 to 5C. Any solvent can be used as the reaction solvent as long as it can dissolve MOH, but water is usually used.
【0008】本発明の方法を実施するには、非プロトン
性溶媒中において、前記一般式(2)で表されるパーフ
ルオロ−t−ブチルアルコキシドとアルキル化剤とを反
応させる。この場合の反応式を、アルキル化剤としてハ
ロゲン化アルキルを用いた場合について示すと、以下の
通りである。[0008] In order to carry out the method of the present invention, the perfluoro-t-butylalkoxide represented by the general formula (2) is reacted with an alkylating agent in an aprotic solvent. The reaction formula in this case is as follows when an alkyl halide is used as the alkylating agent.
【化6】 (式中、R1及びMは前記と同じ意味を示し、Xはハロ
ゲンを示す)Embedded image (Wherein, R 1 and M have the same meaning as described above, and X represents halogen)
【0009】本発明で用いるアルキル化剤は、前記一般
式(1)におけるアルキル基R1に対応するアルキル基
を有するもので、塩素化物(R1−Cl)や、臭素化物
(R1−Br)、硫酸エステル(R1O−SO2−OR)
(式中、Rはアルキル基を示す)等が包含される。これ
らのアルキル化剤の具体例としては、ジアルキル硫酸、
パラトルエンスルホン酸アルキル、アルキル−トリフル
オロメタンスルホネート、トリフルオロメタンスルホン
酸アルキル(トリフラート)、メタンスルホン酸アルキ
ル(メシラート)等が挙げられる。The alkylating agent used in the present invention has an alkyl group corresponding to the alkyl group R 1 in the general formula (1), and includes a chlorinated product (R 1 -Cl) and a brominated product (R 1 -Br). ), Sulfate (R 1 O—SO 2 —OR)
(Wherein, R represents an alkyl group) and the like. Specific examples of these alkylating agents include dialkyl sulfate,
Examples thereof include alkyl p-toluenesulfonate, alkyl-trifluoromethanesulfonate, alkyl trifluoromethanesulfonate (triflate), and alkyl methanesulfonate (mesylate).
【0010】本発明で用いる非プロトン性極性有機溶媒
としては、従来公知の各種のものが用いられる。このよ
うなものとしては、例えば、モノグラム、ジグライム、
トリグライム、テトラグライム、ジエチルエーテル、ジ
ブチルエーテル、ジオキサン等のエーテル類、アセトニ
トリル等のニトリル類、ジメチルホルムアミド、ジメチ
ルアセトアミド等の鎖状アミド類、或いは1,3−ジメ
チル−2−イミダゾリジノン、N−メチル−2−ピロリ
ドン等の環状アミド類等が挙げられる。本発明では、特
に、下記一般式(3)で表されるポリエチレングリコー
ルのジアルキルエーテルの使用が好ましい。As the aprotic polar organic solvent used in the present invention, conventionally known various solvents can be used. Such things include, for example, monogram, diglyme,
Ethers such as triglyme, tetraglyme, diethyl ether, dibutyl ether and dioxane; nitriles such as acetonitrile; chain amides such as dimethylformamide and dimethylacetamide; or 1,3-dimethyl-2-imidazolidinone, N- And cyclic amides such as methyl-2-pyrrolidone. In the present invention, it is particularly preferable to use a dialkyl ether of polyethylene glycol represented by the following general formula (3).
【化3】 前記式中、R2及びR3は低級アルキル基を示し、その炭
素数は1〜3、好ましくは1〜2である。nは1〜1
0、好ましくは3〜5である。本発明においては、特
に、テトラグライム(前記式(3)において、R2及び
R3はそれぞれメチル基を示し、nは4の数を示す)の
使用が好ましい。このようなポリエチレングリコールの
ジアルキルエーテルを溶媒として用いるときには、その
配位効果により、(CF3)3C−OMの溶媒に対する溶
解度が上昇し、反応を効率よく実施することができる。Embedded image In the above formula, R 2 and R 3 represent a lower alkyl group, and have 1 to 3 carbon atoms, preferably 1 to 2 carbon atoms. n is 1 to 1
0, preferably 3-5. In the present invention, it is particularly preferable to use tetraglyme (in the above formula (3), R 2 and R 3 each represent a methyl group, and n represents a number of 4). When such a dialkyl ether of polyethylene glycol is used as a solvent, the coordination effect increases the solubility of (CF 3 ) 3 C-OM in the solvent, so that the reaction can be carried out efficiently.
【0011】前記反応温度は0〜150℃、好ましくは
室温〜100℃である。前記反応を実施する場合、アル
キル化剤は、アルコキシドを含む溶媒に対し、徐々に滴
下して反応させることが好ましい。アルキル化剤の使用
割合は、(CF3)3COM 1モル当り、1〜4モル、
好ましくは1〜3モルの割合である。[0011] The reaction temperature is 0 to 150 ° C, preferably room temperature to 100 ° C. When carrying out the above reaction, it is preferable that the alkylating agent is gradually added dropwise to the solvent containing the alkoxide to cause the reaction. The use ratio of the alkylating agent is 1 to 4 mol per 1 mol of (CF 3 ) 3 COM,
Preferably, the ratio is 1 to 3 mol.
【0012】本発明者らの研究によれば、パーフルオロ
−t−ブチル基を有する含フッ素エーテルは、不燃性を
示し、爆発の危険も少なく、非常に安全性の高い化合物
であることが確認された。According to the study of the present inventors, it has been confirmed that a fluorinated ether having a perfluoro-t-butyl group is nonflammable, has little danger of explosion, and is a very safe compound. Was done.
【0013】[0013]
【実施例】次に、本発明を実施例によりさらに詳述す
る。 参考例1 (t−C4F9ONaの合成)硝子製ラウンドボトムフラ
スコに純水200g、NaOH(1mol、40g)を
仕込み、氷浴中で撹拌した。完全にNaOHが溶解し内
温が5℃以下になったことを確認し、予め水(1mo
l、18g)とt−C4F9OH(1mol、236g)
を混合した溶液を60分間で滴下した。滴下終了後、氷
浴を外し、室温になるまで撹拌した。その後、減圧乾燥
により水分を除去し、白色の固形物((CF3)3CON
a)を251g得た。Next, the present invention will be described in more detail by way of examples. Reference Example 1 (t-C 4 F 9 Synthesis of ONa) pure water 200g glass round bottom flask was charged with NaOH (1 mol, 40 g), was stirred in an ice bath. After confirming that NaOH was completely dissolved and the internal temperature became 5 ° C. or less, water (1 mol
l, 18 g) and t-C 4 F 9 OH ( 1mol, 236g)
Was added dropwise over 60 minutes. After completion of the dropwise addition, the ice bath was removed, and the mixture was stirred until it reached room temperature. Thereafter, moisture was removed by drying under reduced pressure to obtain a white solid ((CF 3 ) 3 CON).
251 g of a) were obtained.
【0014】実施例1 内容積1リットルのSUS製オートクレーブに参考例1
で合成したt−C4F9ONa(0.1mol、23.6
g)、ジグライム500mlを仕込み、400rpmで
撹拌しながら70℃まで徐々に昇温した。そして、アル
キル化剤であるEt2SO4(0.2mol、30.8
g)を120分間で滴下した。滴下終了後、1時間撹拌
を継続した。反応終了後、フラッシュにて生成物を抜き
だし、ドライアイス−エタノールバスにて回収した。回
収物を19FNMRで分析したところ、97.5%のt−
C4F9OEtと2.5%のt−C4F9OHが確認され
た。回収物を水洗したあと、ガスクロマトグラフで分析
した結果、その生成物t−C4F9OEtの純度は99.
9%であり、回収率は60%であった。Example 1 Reference example 1 was applied to a SUS autoclave having an internal volume of 1 liter.
T-C 4 F 9 ONa (0.1 mol, 23.6)
g) and 500 ml of diglyme, and gradually heated to 70 ° C. while stirring at 400 rpm. Then, Et 2 SO 4 (0.2 mol, 30.8
g) was added dropwise over 120 minutes. After completion of the dropwise addition, stirring was continued for 1 hour. After completion of the reaction, the product was extracted by flash and collected in a dry ice-ethanol bath. The recovered product was analyzed by 19 F NMR to find that 97.5% of t-
C 4 F 9 OEt and 2.5% t-C 4 F 9 OH was confirmed. The collected product was washed with water and analyzed by gas chromatography. As a result, the purity of the product t-C 4 F 9 OEt was 99.
9% and the recovery was 60%.
【0015】実施例2 溶媒をテトラグライムに変更した以外、実施例2と同様
に実験を行った。水洗後の生成物の純度は99.9%で
あり、回収率は93%であった。Example 2 An experiment was conducted in the same manner as in Example 2 except that the solvent was changed to tetraglyme. The purity of the product after washing with water was 99.9%, and the recovery was 93%.
【0016】実施例3 アルキル化剤をMe2SO4(0.2mol、25.2
g)に変更した以外、実施例3と同様にして実験を行っ
た。水洗後の生成物の純度は99.9%であり、回収率
は93%であった。Example 3 The alkylating agent was Me 2 SO 4 (0.2 mol, 25.2)
The experiment was carried out in the same manner as in Example 3 except that g) was changed. The purity of the product after washing with water was 99.9%, and the recovery was 93%.
【0017】[0017]
【発明の効果】本発明によれば、パーフルオロ−t−ブ
チル基を有する前記一般式(1)の含フッ素エーテルを
高純度でかつ収率よくかつ安全に製造することができ
る。According to the present invention, the fluorinated ether having the perfluoro-t-butyl group represented by the general formula (1) can be produced with high purity, high yield, and safety.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤本 悦男 東京都文京区本郷2−40−17 本郷若井 ビル6階財団法人地球環境産業技術研究 機構 新規冷媒等プロジェクト室内 (72)発明者 鈴田 哲也 東京都文京区本郷2−40−17 本郷若井 ビル6階財団法人地球環境産業技術研究 機構 新規冷媒等プロジェクト室内 (72)発明者 阿部 隆 愛知県名古屋市北区平手町1丁目 名古 屋工業技術研究所内 (72)発明者 関屋 章 茨城県つくば市東1丁目1番 工業技術 院物質工学工業技術研究所内 審査官 藤森 知郎 (56)参考文献 国際公開96/40834(WO,A1) J.Fluorine Chem., Vol.11 No.3−4(1978)p. 327−p.335 (58)調査した分野(Int.Cl.6,DB名) C07C 41/16 C07C 43/12 CA(STN) CAOLD(STN) REGISTRY(STN)────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Etsuo Fujimoto 2-40-17 Hongo, Bunkyo-ku, Tokyo Hongo Wakai Building 6F, New Refrigerant Project Room, etc. (72) Inventor Tetsuya Suzuda Tokyo 6F, Hongo Wakai Building, 2-40-17 Hongo, Bunkyo-ku, Tokyo New Refrigerants Project Room (72) Inventor Takashi Abe Nagoya Technical Research Institute, 1-chome, Hirate-cho, Kita-ku, Nagoya-shi, Aichi In-house (72) Inventor Akira Sekiya 1-1-1, Higashi, Tsukuba-shi, Ibaraki Pref. Inspector, National Institute of Materials Science and Technology, Examiner, Toshiro Fujimori (56) Reference International Publication 96/40834 (WO, A1) Fluorine Chem. , Vol. 11 No. 3-4 (1978) p. 327-p. 335 (58) Field surveyed (Int.Cl. 6 , DB name) C07C 41/16 C07C 43/12 CA (STN) CAOLD (STN) REGISTRY (STN)
Claims (2)
ッ素エーテルを製造する方法において、下記一般式
(2) 【化2】 (CF3)3C−OM (2) (式中、Mはアルカリ金属を示す)で表されるアルコキ
シドを、非プロトン性溶媒中で、低級アルキル基R1を
有するアルキル化剤と反応させることを特徴とする前記
の方法。1. A fluorine-containing ether represented by the following general formula (1): (CF 3 ) 3 C—O—R 1 (1) (wherein R 1 represents a lower alkyl group) In the production method, an alkoxide represented by the following general formula (2): (CF 3 ) 3 C-OM (2) (wherein M represents an alkali metal) is prepared in an aprotic solvent. , An alkylating agent having a lower alkyl group R 1 .
(3) 【化3】 R2O(C2H5O)nR3 (3) (式中、R2及びR3は低級アルキル基を示し、nは2
〜6の数を示す)で表されるポリエチレングリコールジ
エステルである請求項1の方法。2. The aprotic solvent is represented by the following general formula (3): R 2 O (C 2 H 5 O) n R 3 (3) (wherein R 2 and R 3 are lower alkyl groups) And n is 2
The method according to claim 1, which is a polyethylene glycol diester represented by the following formula:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP3992797A JP2903494B2 (en) | 1997-02-07 | 1997-02-07 | Method for producing fluorinated ether |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3992797A JP2903494B2 (en) | 1997-02-07 | 1997-02-07 | Method for producing fluorinated ether |
Publications (2)
Publication Number | Publication Date |
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JPH10218821A JPH10218821A (en) | 1998-08-18 |
JP2903494B2 true JP2903494B2 (en) | 1999-06-07 |
Family
ID=12566580
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JP3992797A Expired - Lifetime JP2903494B2 (en) | 1997-02-07 | 1997-02-07 | Method for producing fluorinated ether |
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Families Citing this family (1)
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CN110002968B (en) * | 2019-04-28 | 2022-04-08 | 泉州宇极新材料科技有限公司 | Method for preparing fluorine-containing ether |
-
1997
- 1997-02-07 JP JP3992797A patent/JP2903494B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
J.Fluorine Chem.,Vol.11 No.3−4(1978)p.327−p.335 |
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