JP2005145917A - Electrophilic perfluoroalkylating agent and method for manufacturing perfluoroalkylated compounds - Google Patents

Electrophilic perfluoroalkylating agent and method for manufacturing perfluoroalkylated compounds Download PDF

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JP2005145917A
JP2005145917A JP2003388769A JP2003388769A JP2005145917A JP 2005145917 A JP2005145917 A JP 2005145917A JP 2003388769 A JP2003388769 A JP 2003388769A JP 2003388769 A JP2003388769 A JP 2003388769A JP 2005145917 A JP2005145917 A JP 2005145917A
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JP4547898B2 (en
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Kenji Adachi
健二 足達
Sumi Ishihara
寿美 石原
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Daikin Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrophilic perfluoroalkylating agent having a new structure that is capable of effectively reacting with a highly reacting nucleophile, which can not be sufficiently caused to react with an electrophilic perfluoroalkylating agent of a salt structure, such as a Grignard reagent and the like, and to provide a method for manufacturing a perfluoroalkylated organic compound. <P>SOLUTION: The perfluoroalkylating agent to be used is represented by general formula (1), wherein A denotes a carbonyl group -CO- or a sulfonyl group -SO<SB>2</SB>-, each of R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP>and R<SP>4</SP>may be the same or different group and denotes a hydrogen atom, a nitro group, a cyano group, a 6-10C aryl group, a 1-5C alkyl group, a 1-5C haloalkyl group, a 1-5C alkoxy group, a 2-6C alkoxycarbonyl group or a 3-7C carbamoyl group and Rf denotes a 1-20C perfluoroalkyl group. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、塩とは異なる新規の構造を有し、グリニヤール試薬等のパーフルオロアルキル化反応を可能にする求電子的パーフルオロアルキル化剤、及びそれを用いて行うパーフルオロアルキル化有機化合物の製造方法に関するものである。   The present invention relates to an electrophilic perfluoroalkylating agent having a novel structure different from that of a salt and enabling a perfluoroalkylation reaction such as a Grignard reagent, and a perfluoroalkylated organic compound using the same. It relates to a manufacturing method.

これまで求電子的パーフルオロアルキル化剤としては、S−パーフルオロアルキルジフェニルチオフェニウム塩(後記の非特許文献1〜2参照)、S−パーフルオロアルキルジベンゾチオフェニウム塩、Se−パーフルオロアルキルジベンゾゼレニウム塩及びこれらの誘導体(後記の特許文献1、非特許文献3〜4参照)、或いはO−パーフルオロアルキルジベンゾオキソニウム塩(後記の非特許文献5参照)が報告されている。   So far, as electrophilic perfluoroalkylating agents, S-perfluoroalkyldiphenylthiophenium salts (see Non-Patent Documents 1 and 2 below), S-perfluoroalkyldibenzothiophenium salts, Se-perfluoro Alkyl dibenzozelenium salts and derivatives thereof (see Patent Document 1 and Non-Patent Documents 3 to 4 below) or O-perfluoroalkyldibenzooxonium salts (see Non-Patent Document 5 below) have been reported.

これらはいずれも塩の構造を有しており、さまざまな求核剤と反応して、パーフルオロアルキル化された有機化合物を与える。しかしながら、非常に反応性の高い求核剤、例えばグリニヤール試薬のような炭素アニオンをパーフルオロアルキル化する反応は、これらの試薬を用いてもほとんど進行しない。   These all have a salt structure and react with various nucleophiles to give perfluoroalkylated organic compounds. However, the reaction of perfluoroalkylating a carbon anion such as a highly reactive nucleophile, for example, Grignard reagent, hardly proceeds even when these reagents are used.

この理由は、S−パーフルオロアルキルジフェニルチオフェニウム塩、S−パーフルオロアルキルジベンゾチオフェニウム塩、Se−パーフルオロアルキルジベンゾゼレニウム塩及びそれらの誘導体の場合、いずれも塩の構造をもつため、パーフルオロアルキル化反応よりもパーフルオロアルキル化剤の分解反応が優先的に起こるためである。即ち、これらのパーフルオロアルキル化剤のカチオン部分は非常に電子欠乏性であるので、グリニヤール試薬のような反応性の高い求核剤を作用させると、求核剤から一電子移動が起こり、パーフルオロアルキル基がラジカルとなってオニウム塩から脱離してしまい、パーフルオロアルキル化剤が分解するからである。   This is because S-perfluoroalkyldiphenylthiophenium salt, S-perfluoroalkyldibenzothiophenium salt, Se-perfluoroalkyldibenzozelenium salt and derivatives thereof all have a salt structure. This is because the decomposition reaction of the perfluoroalkylating agent occurs preferentially over the perfluoroalkylation reaction. That is, since the cation portion of these perfluoroalkylating agents is very electron deficient, when a highly reactive nucleophile such as a Grignard reagent is allowed to act, one electron transfer occurs from the nucleophile and This is because the fluoroalkyl group is removed from the onium salt as a radical, and the perfluoroalkylating agent is decomposed.

o−パーフルオロアルキルジベンゾオキソニウム塩の場合は、極めて不安定で反応性が高いため、求核性の低い溶媒、例えば塩化メチレンを用い、パーフルオロアルキル化反応を起こさせる反応容器内に、対応するジアゾニウム塩からin situで発生させ、そのままパーフルオロアルキル化反応に使用する。この際、グリニヤール試薬を調整する際に通常用いられるエーテル系の溶媒、例えばテトラヒドロフランのような溶媒は、o−パーフルオロアルキルジベンゾオキソニウム塩とただちに反応してしまうので使用できず、グリニヤール反応を実施することができない。また、酸素原子、窒素原子のパーフルオロアルキル化は報告されているが、炭素原子のパーフルオロアルキル化は報告されていない。   In the case of o-perfluoroalkyldibenzooxonium salt, since it is extremely unstable and highly reactive, a solvent having low nucleophilicity, for example, methylene chloride, is used in a reaction vessel in which a perfluoroalkylation reaction is caused. It is generated in situ from the diazonium salt to be used as it is for perfluoroalkylation reaction. At this time, an ether solvent usually used for preparing a Grignard reagent, for example, a solvent such as tetrahydrofuran cannot be used because it reacts immediately with the o-perfluoroalkyldibenzooxonium salt, and the Grignard reaction is carried out. Can not do it. In addition, perfluoroalkylation of oxygen atoms and nitrogen atoms has been reported, but perfluoroalkylation of carbon atoms has not been reported.

特開平3−197479号公報(特許請求の範囲、第46〜51頁)JP-A-3-197479 (Claims, pages 46-51) L.M.Yagupol’skii et al., J.Org.Chem.USSR., 1984,20,103L.M.Yagupol’skii et al., J.Org.Chem.USSR., 1984, 20, 103 Jing-Jing Yang,R.L.Kirchmeier and J.M.Shreeve, J.Org.Chem., 1998, 63, 2656Jing-Jing Yang, R.L.Kirchmeier and J.M.Shreeve, J.Org.Chem., 1998, 63, 2656 T.Umemoto and S.Ishihara, Tetrahedron Lett., 1990,31,3579T.Umemoto and S.Ishihara, Tetrahedron Lett., 1990,31,3579 T.Umemoto and S.Ishihara, J.Am.Chem.Soc., 1993,115,2156T.Umemoto and S.Ishihara, J.Am.Chem.Soc., 1993,115,2156 T.Umemoto, Chem.Rev., 1996,96,1757T. Umemoto, Chem. Rev., 1996,96,1757

本発明は、上記のような事情に鑑みてなされたものであって、その目的は、塩の構造を有する従来の求電子的パーフルオロアルキル化剤では十分に反応し得なかった反応性の高い求核剤、例えばグリニヤール試薬等に対し、より効果的に反応してパーフルオロアルキル化有機化合物を生じさせる、塩とは異なる新規の構造を有する求電子的パーフルオロアルキル化剤、及びそれを用いたパーフルオロアルキル化有機化合物の製造方法を提供することにある。   The present invention has been made in view of the circumstances as described above, and its purpose is to have high reactivity that could not be sufficiently reacted with a conventional electrophilic perfluoroalkylating agent having a salt structure. An electrophilic perfluoroalkylating agent having a novel structure different from a salt, which reacts more effectively with a nucleophile such as a Grignard reagent to produce a perfluoroalkylated organic compound, and uses the same Another object of the present invention is to provide a method for producing a perfluoroalkylated organic compound.

即ち、本発明は、下記の一般式(1)で表される求電子的パーフルオロアルキル化剤に係わるものである。
一般式(1):

Figure 2005145917
(式中、Aはカルボニル基−CO−又はスルホニル基−SO2−を表し、R1、R2、R3及びR4は同一の若しくは異なる基であって、水素原子、ハロゲン原子、ニトロ基、シアノ基、炭素数6から10のアリール基、炭素数1から5のアルキル基、炭素数1から5のハロアルキル基、炭素数1から5のアルコキシ基、炭素数2から6のアルコキシカルボニル基、又は炭素数3から7のカルバモイル基を表し、R1とR2、R2とR3、又はR3とR4とが結合して環状構造を成してもよく、その環は芳香環であってもよい。Rfは炭素数1から20のパーフルオロアルキル基を示す。) That is, the present invention relates to an electrophilic perfluoroalkylating agent represented by the following general formula (1).
General formula (1):
Figure 2005145917
(In the formula, A represents a carbonyl group —CO— or a sulfonyl group —SO 2 —, and R 1 , R 2 , R 3 and R 4 are the same or different groups, and are a hydrogen atom, a halogen atom or a nitro group. , A cyano group, an aryl group having 6 to 10 carbon atoms, an alkyl group having 1 to 5 carbon atoms, a haloalkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkoxycarbonyl group having 2 to 6 carbon atoms, Or a carbamoyl group having 3 to 7 carbon atoms, and R 1 and R 2 , R 2 and R 3 , or R 3 and R 4 may be bonded to form a cyclic structure, and the ring is an aromatic ring Rf represents a perfluoroalkyl group having 1 to 20 carbon atoms.)

本発明はまた、下記の一般式(3)または一般式(4)で表される求電子的パーフルオロアルキル化剤にも係わるものである。
一般式(3):

Figure 2005145917
(式中、Aは、カルボニル基−CO−又はスルホニル基−SO2−を表し、R5及びR6は同一の若しくは異なる基であって、置換基を有してもよい炭素数6から20のアリール基、置換基を有してもよい炭素数1から10のアルキル基、又は置換基を有してもよい炭素数1から10のハロアルキル基を表し、Rfは炭素数1から20のパーフルオロアルキル基を示す。) The present invention also relates to an electrophilic perfluoroalkylating agent represented by the following general formula (3) or general formula (4).
General formula (3):
Figure 2005145917
(In the formula, A represents a carbonyl group —CO— or a sulfonyl group —SO 2 —, and R 5 and R 6 are the same or different groups and may have a substituent having 6 to 20 carbon atoms. An aryl group, an optionally substituted alkyl group having 1 to 10 carbon atoms, or an optionally substituted haloalkyl group having 1 to 10 carbon atoms, wherein Rf is a par 1 to 20 carbon atoms. Represents a fluoroalkyl group.)

一般式(4):

Figure 2005145917
(式中、A1及びA2は同一の若しくは異なる基であって、カルボニル基−CO−又はスルホニル基−SO2−を表し、R7、R8及びR9は同一の若しくは異なる基であって、置換基を有してもよい炭素数6から20のアリール基、置換基を有してもよい炭素数1から10のアルキル基、又は置換基を有してもよい炭素数1から10のハロアルキル基を表し、Rfは炭素数1から20のパーフルオロアルキル基を示す。) General formula (4):
Figure 2005145917
(In the formula, A 1 and A 2 are the same or different groups and represent a carbonyl group —CO— or a sulfonyl group —SO 2 —, and R 7 , R 8 and R 9 are the same or different groups. An aryl group having 6 to 20 carbon atoms which may have a substituent, an alkyl group having 1 to 10 carbon atoms which may have a substituent, or 1 to 10 carbon atoms which may have a substituent. Rf represents a perfluoroalkyl group having 1 to 20 carbon atoms.)

本発明は更に、前記一般式(1)、(3)又は(4)で表わされる求電子的パーフルオロアルキル化剤を用いてパーフルオロアルキル化反応を行なう工程を有する、パーフルオロアルキル化有機化合物の製造方法も提供するものである。   The present invention further comprises a perfluoroalkylated organic compound having a step of performing a perfluoroalkylation reaction using the electrophilic perfluoroalkylating agent represented by the general formula (1), (3) or (4). This manufacturing method is also provided.

上記一般式(3)もしくは上記一般式(4)で表わされる化合物の一部は、すでに下記の文献において合成が報告されているが、化合物の物性評価等に用いられているだけで、これらをペルフルオロアルキル化剤として用いた例はない。   Some of the compounds represented by the above general formula (3) or the above general formula (4) have already been synthesized in the following literature, but these are only used for evaluating the physical properties of the compounds. There is no example of using it as a perfluoroalkylating agent.

N.V.Kondratenko et al., J.Org.Chem.USSR., 1986,22(8),1542
D.T.Sauer and J.M.Shreeve, Inorg.Chem., 1972,11(2),238
I.A.Koppel et al., J.Org.Chem.USSR., 1992,28(8),1411
I.G.Krajnikova et al., J.Fluorine Chem., 1995,71,13
E.Magnier et al., Synthesis, 2003,(4),565
R.Y.Garlyauskajte et al.,Tetrahedron, 1994,50(23),6891
NVKondratenko et al., J. Org. Chem. USSR., 1986, 22 (8), 1542
DTSauer and JMShreeve, Inorg.Chem., 1972,11 (2), 238
IAKoppel et al., J. Org. Chem. USSR., 1992, 28 (8), 1411
IGKrajnikova et al., J. Fluorine Chem., 1995, 71, 13
E. Magnier et al., Synthesis, 2003, (4), 565
RYGarlyauskajte et al., Tetrahedron, 1994, 50 (23), 6891

本発明者は、鋭意研究の結果、塩構造を有しない化合物を用いた新たな求電子的パーフルオロアルキル化反応を見出し、さらに新規な構造をもつより有用な求電子的パーフルオロアルキル化剤を開発するに至った。   As a result of diligent research, the present inventor found a new electrophilic perfluoroalkylation reaction using a compound having no salt structure, and further developed a more useful electrophilic perfluoroalkylating agent having a novel structure. It came to develop.

先述したように、従来の求電子的パーフルオロアルキル化剤が反応性の高い求核剤に対して前記パーフルオロアルキル化反応を十分に行えない理由は、従来の求電子的パーフルオロアルキル化剤が塩の構造を有するため、前記求核剤からオニウム塩への一電子移動が優先して起こるからである。本発明の求電子的パーフルオロアルキル化剤は、塩とは異なる構造を有するので、上記の不都合が生じることがなく、例えばグリニヤール試薬等のような反応性の高い求核剤に対しても、有効に前記パーフルオロアルキル化反応を行うことができ、新規で効率のよいパーフルオロアルキル化有機化合物の製造方法を提供することができる。   As described above, the conventional electrophilic perfluoroalkylating agent cannot sufficiently perform the perfluoroalkylation reaction with respect to a highly reactive nucleophile. This is because one-electron transfer from the nucleophile to the onium salt occurs preferentially due to the salt structure. Since the electrophilic perfluoroalkylating agent of the present invention has a structure different from that of the salt, the above-mentioned disadvantage does not occur. For example, a highly reactive nucleophile such as a Grignard reagent can be used. The perfluoroalkylation reaction can be effectively carried out, and a novel and efficient method for producing a perfluoroalkylated organic compound can be provided.

本発明において、下記の一般式(2)で表される求電子的パーフルオロアルキル化剤が、特に好ましい。
一般式(2):

Figure 2005145917
(式中、R1、R2、R3及びR4は同一の若しくは異なる基であって、水素原子、ハロゲン原子、ニトロ基、シアノ基、炭素数6から10のアリール基、炭素数1から5のアルキル基、炭素数1から5のハロアルキル基、炭素数1から5のアルコキシ基、炭素数2から6のアルコキシカルボニル基、又は炭素数3から7のカルバモイル基を表し、R1とR2、R2とR3、又はR3とR4とが結合して環状構造を成してもよく、その環は芳香環であってもよい。Rfは炭素数1から20のパーフルオロアルキル基を示す。) In the present invention, an electrophilic perfluoroalkylating agent represented by the following general formula (2) is particularly preferred.
General formula (2):
Figure 2005145917
(In the formula, R 1 , R 2 , R 3 and R 4 are the same or different groups, and are a hydrogen atom, halogen atom, nitro group, cyano group, aryl group having 6 to 10 carbon atoms, An alkyl group having 5 carbon atoms, a haloalkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkoxycarbonyl group having 2 to 6 carbon atoms, or a carbamoyl group having 3 to 7 carbon atoms, and R 1 and R 2 , R 2 and R 3 , or R 3 and R 4 may combine to form a cyclic structure, and the ring may be an aromatic ring, and Rf is a perfluoroalkyl group having 1 to 20 carbon atoms. Is shown.)

本発明において、前記Rfがトリフルオロメチル基であるのがよい。この他に、前記Rfとして、ペンタフルオロエチル基、パーフルオロプロピル基、パーフルオロイソプロピル基、パーフルオロブチル基、パーフルオロイソブチル基、パーフルオロペンチル基、パーフルオロイソペンチル基、パーフルオロヘキシル基、パーフルオロシクロヘキシル基、パーフルオロオクチル基、パーフルオロデシル基、パーフルオロドデシル基、パーフルオロオクタデシル基などを挙げることができる。   In the present invention, Rf is preferably a trifluoromethyl group. In addition, as Rf, pentafluoroethyl group, perfluoropropyl group, perfluoroisopropyl group, perfluorobutyl group, perfluoroisobutyl group, perfluoropentyl group, perfluoroisopentyl group, perfluorohexyl group, perfluorohexyl group, Examples thereof include a fluorocyclohexyl group, a perfluorooctyl group, a perfluorodecyl group, a perfluorododecyl group, and a perfluorooctadecyl group.

また、前記一般式(1)又は前記一般式(2)で表される求電子的パーフルオロアルキル化剤において、
前記ハロゲン原子とは、フッ素原子、塩素原子、臭素原子、ヨウ素原子を表し、
前記炭素数6から10のアリール基として、フェニル基、ナフチル基などが挙げられ 、
前記炭素数1から5のアルキル基として、メチル基、エチル基、プロピル基、イソプ ロピル基、ブチル基、イソブチル基、ペンチル基などが挙げられ、
前記炭素数1から5のハロアルキル基として、トリフルオロメチル基、ペンタフルオ ロエチル基、パーフルオロプロピル基、ヘキサフルオロイソプロピル基、パーフルオロ ブチル基、パーフルオロペンチル基、ジフルオロメチル基、1,1,2,2−テトラフル オロエチル基、2,2,2-トリフルオロエチル基、3,3,3−トリフルオロプロピル基 、トリクロロメチル基、2,2,2−トリクロロエチル基などが挙げられ、
前記炭素数1から5のアルコキシ基として、メトキシ基、エトキシ基、プロポキシ基 、イソプロポキシ基、ブトキシ基などが挙げられ、
前記炭素数2から6のアルコキシカルボニル基として、メトキシカルボニル基、エト キシカルボニル基、プロポキシカルボニル基などが挙げられ、
前記炭素数3から7のカルバモイル基として、ジメチルカルバモイル基、ジエチルカ ルバモイル基などが挙げられる。
In the electrophilic perfluoroalkylating agent represented by the general formula (1) or the general formula (2),
The halogen atom represents a fluorine atom, a chlorine atom, a bromine atom, an iodine atom,
Examples of the aryl group having 6 to 10 carbon atoms include a phenyl group and a naphthyl group.
Examples of the alkyl group having 1 to 5 carbon atoms include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, and a pentyl group.
Examples of the haloalkyl group having 1 to 5 carbon atoms include trifluoromethyl group, pentafluoroethyl group, perfluoropropyl group, hexafluoroisopropyl group, perfluorobutyl group, perfluoropentyl group, difluoromethyl group, 1,1,2, 2-tetrafluoroethyl group, 2,2,2-trifluoroethyl group, 3,3,3-trifluoropropyl group, trichloromethyl group, 2,2,2-trichloroethyl group, etc.
Examples of the alkoxy group having 1 to 5 carbon atoms include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, and a butoxy group.
Examples of the alkoxycarbonyl group having 2 to 6 carbon atoms include a methoxycarbonyl group, an ethoxycarbonyl group, and a propoxycarbonyl group.
Examples of the carbamoyl group having 3 to 7 carbon atoms include a dimethylcarbamoyl group and a diethylcarbamoyl group.

具体的には、下記の構造の化合物が例示できるが、これに限定されるわけではない。

Figure 2005145917
Specific examples include compounds having the following structure, but are not limited thereto.
Figure 2005145917

これらの求電子的パーフルオロアルキル化剤は、下記の反応経路で合成することができる。これらの反応の原料であるスルホキシドは、対応するチオールから、既に報告されている公知の方法(例えば、Jing-Jing Yang, R.L.Kirchmeier and J.M.Shreeve, J.Org.Chem., 1998,63,2656 等)で合成することができる。   These electrophilic perfluoroalkylating agents can be synthesized by the following reaction route. The sulfoxide which is the raw material of these reactions is obtained from the corresponding thiol by known methods already reported (for example, Jing-Jing Yang, RLKirchmeier and JMShreeve, J. Org. Chem., 1998, 63, 2656, etc. ).

反応経路:

Figure 2005145917
Reaction path:
Figure 2005145917

また、前記一般式(3)又は前記一般式(4)で表わされる化合物において、
前記置換基を有してもよい炭素数6から20のアリール基として、フェニル基、ナフ チル基、ビフェニル基、アントラニル基、ニトロフェニル基、メチルフェニル基、ジメ チルフェニル基、クロロフェニル基、ジクロロフェニル基、フルオロフェニル基、メト キシフェニル基、シアノフェニル基、ニトロナフチル基、メチルナフチル基、クロロナ フチル基などが挙げられ、
前記置換基を有してもよい炭素数1から10のアルキル基として、メチル基、エチル 基、プロピル基、イソプロピル基、ブチル基、ヘキシル基、オクチル基、ベンジル基、 フェニルエチル基などが挙げられ、
前記置換基を有してもよい炭素数1から10のハロアルキル基として、トリフルオロ メチル基、ペンタフルオロエチル基、パーフルオロプロピル基、ヘキサフルオロイソプ ロピル基、パーフルオロブチル基、パーフルオロヘキシル基、ジフルオロメチル基、1 ,1,2,2−テトラフルオロエチル基、2,2,2−トリフルオロエチル基、3,3,3− トリフルオロプロピル基、トリクロロメチル基、2,2,2−トリクロロエチル基などが 挙げられる。
In the compound represented by the general formula (3) or the general formula (4),
Examples of the aryl group having 6 to 20 carbon atoms which may have a substituent include a phenyl group, a naphthyl group, a biphenyl group, an anthranyl group, a nitrophenyl group, a methylphenyl group, a dimethylphenyl group, a chlorophenyl group, a dichlorophenyl group, Fluorophenyl group, methoxyphenyl group, cyanophenyl group, nitronaphthyl group, methylnaphthyl group, chloronaphthyl group, etc.
Examples of the alkyl group having 1 to 10 carbon atoms that may have a substituent include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a hexyl group, an octyl group, a benzyl group, and a phenylethyl group. ,
Examples of the haloalkyl group having 1 to 10 carbon atoms which may have a substituent include a trifluoromethyl group, a pentafluoroethyl group, a perfluoropropyl group, a hexafluoroisopropyl group, a perfluorobutyl group, a perfluorohexyl group, Difluoromethyl group, 1,1,2,2-tetrafluoroethyl group, 2,2,2-trifluoroethyl group, 3,3,3-trifluoropropyl group, trichloromethyl group, 2,2,2-trichloro Examples include an ethyl group.

また、前記「置換基を有してもよい」という記載の置換基とは、ハロゲン原子、ニトロ基、シアノ基、炭素数6から10のアリール基、炭素数1から5のアルキル基、炭素数1から5のハロアルキル基、炭素数1から5のアルコキシ基、炭素数2から6のアルコキシカルボニル基、炭素数3から7のカルバモイル基を表している。ここで、
前記ハロゲン原子とは、フッ素原子、塩素原子、臭素原子、ヨウ素原子を表し、
前記炭素数6から10のアリール基として、フェニル基、ナフチル基などが挙げられ 、
前記炭素数1から5のアルキル基として、メチル基、エチル基、プロピル基、イソプ ロピル基、ブチル基、イソブチル基、ペンチル基などが挙げられ、
前記炭素数1から5のハロアルキル基として、トリフルオロメチル基、ペンタフルオ ロエチル基、パーフルオロプロピル基、ヘキサフルオロイソプロピル基、パーフルオロ ブチル基、パーフルオロペンチル基、ジフルオロメチル基、1,1,2,2−テトラフル オロエチル基、2,2,2−トリフルオロエチル基、3,3,3-トリフルオロプロピル基 、トリクロロメチル基、2,2,2−トリクロロエチル基などが挙げられ、
前記炭素数1から5のアルコキシ基として、メトキシ基、エトキシ基、プロポキシ基 、イソプロポキシ基、ブトキシ基などが挙げられ、
前記炭素数2から6のアルコキシカルボニル基として、メトキシカルボニル基、エト キシカルボニル基、プロポキシカルボニル基などが挙げられ、
前記炭素数3から7のカルバモイル基として、ジメチルカルバモイル基、ジエチルカ ルバモイル基などが挙げられる。
The substituent described as “may have a substituent” includes a halogen atom, a nitro group, a cyano group, an aryl group having 6 to 10 carbon atoms, an alkyl group having 1 to 5 carbon atoms, and a carbon number. A haloalkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkoxycarbonyl group having 2 to 6 carbon atoms, and a carbamoyl group having 3 to 7 carbon atoms are represented. here,
The halogen atom represents a fluorine atom, a chlorine atom, a bromine atom, an iodine atom,
Examples of the aryl group having 6 to 10 carbon atoms include a phenyl group and a naphthyl group.
Examples of the alkyl group having 1 to 5 carbon atoms include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, and a pentyl group.
Examples of the haloalkyl group having 1 to 5 carbon atoms include trifluoromethyl group, pentafluoroethyl group, perfluoropropyl group, hexafluoroisopropyl group, perfluorobutyl group, perfluoropentyl group, difluoromethyl group, 1,1,2, 2-tetrafluoroethyl group, 2,2,2-trifluoroethyl group, 3,3,3-trifluoropropyl group, trichloromethyl group, 2,2,2-trichloroethyl group, etc.
Examples of the alkoxy group having 1 to 5 carbon atoms include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, and a butoxy group.
Examples of the alkoxycarbonyl group having 2 to 6 carbon atoms include a methoxycarbonyl group, an ethoxycarbonyl group, and a propoxycarbonyl group.
Examples of the carbamoyl group having 3 to 7 carbon atoms include a dimethylcarbamoyl group and a diethylcarbamoyl group.

具体的には、下記の構造が例示できるが、これに限定されるわけではない。

Figure 2005145917
Specifically, the following structures can be exemplified, but are not limited thereto.
Figure 2005145917

パーフルオロアルキル化反応を受ける基質としては、さまざまな求核剤が挙げられ、これらに限定されるわけではないが、例えば、グリニヤール試薬(R−MgX、Ar−MgX)、アルキルメタル(R−M)、アルケニルメタル(R12C=CR3M)、アルキニルメタル(R1C≡CM)、アリールメタル(Ar−M)などの有機金属試薬、エナミン、シリルエノールエーテル、アルコキシド、フェノキシド、チオアルコキシド及びチオフェノキシドなどが挙げられる。但し、式中、Mは、Li、Na、K、ZnX及びCuXなどである(但し、Rはアルキル基、Arはアリール基、R1、R2及びR3は水素原子、ハロゲン原子、アルキル基またはアリール基、Xはハロゲン原子を表す。以下、同様。)。 Examples of substrates that undergo perfluoroalkylation reactions include, but are not limited to, various nucleophiles such as Grignard reagents (R-MgX, Ar-MgX), alkylmetals (RM). ), Organometallic reagents such as alkenyl metal (R 1 R 2 C═CR 3 M), alkynyl metal (R 1 C≡CM), aryl metal (Ar—M), enamine, silyl enol ether, alkoxide, phenoxide, thio Examples include alkoxide and thiophenoxide. In the formula, M is Li, Na, K, ZnX, CuX or the like (where R is an alkyl group, Ar is an aryl group, R 1 , R 2 and R 3 are a hydrogen atom, a halogen atom, an alkyl group) Or an aryl group, X represents a halogen atom, and the same shall apply hereinafter.)

パーフルオロアルキル化反応に用いる溶媒としては、通常有機反応で使用される溶媒を用いることができる。例えば、ジエチルエーテル、ジイソプロピルエーテル、テトラヒドロフラン(THF)、ジメトキシエタンのようなエーテル系溶媒、塩化メチレン等のハロゲン系溶媒、アセトニトリル、プロピオニトリル、ジメチルホルムアミド(DMF)、ジメチルスルホキシド(DMSO)、N-メチル-2-ピロリジノン(NMP)、ヘキサメチルホスホルアミド(HMPA)、1,3-ジメチル-2-イミダゾリジノン(DMI)などが挙げられ、これらの溶媒を2種以上混合して用いてもよい。   As a solvent used in the perfluoroalkylation reaction, a solvent usually used in an organic reaction can be used. For example, ether solvents such as diethyl ether, diisopropyl ether, tetrahydrofuran (THF), dimethoxyethane, halogen solvents such as methylene chloride, acetonitrile, propionitrile, dimethylformamide (DMF), dimethyl sulfoxide (DMSO), N- Examples thereof include methyl-2-pyrrolidinone (NMP), hexamethylphosphoramide (HMPA), 1,3-dimethyl-2-imidazolidinone (DMI), and a mixture of two or more of these solvents may be used. Good.

反応温度は、それぞれの反応で適した温度を選択すればよいが、−100℃から250℃の範囲内で行われ、好ましくは−80℃から150℃で実施される。   The reaction temperature may be selected as appropriate for each reaction, but it is carried out within the range of -100 ° C to 250 ° C, preferably -80 ° C to 150 ° C.

後述する実施例2と比較例1とのトリフルオロメチル化反応の結果の比較、及び実施例4、5、6と比較例2とのトリフルオロメチル化反応の結果の比較では、反応性の高い有機金属試薬に対し、塩構造ではない本発明のトリフルオロメチル化剤が明らかに好結果を与えた。特に実施例4及び実施例5と比較例2のグリニヤール反応においては、塩構造のトリフルオロメチル化剤(11)がほとんどトリフルオロメチルベンゼンを生成せず分解が優先したのに対して、トリフルオロメチル化剤(5)は基質を等モル用いた場合24%、基質を1.5倍モルに増やすと31%の高い収率で目的物を生成した。塩構造のトリフルオロメチル化剤(11)の場合は、基質を増やしても収率向上は認められない。   In the comparison of the results of the trifluoromethylation reaction between Example 2 and Comparative Example 1 described later, and the comparison of the results of the trifluoromethylation reaction between Examples 4, 5, and 6 and Comparative Example 2, the reactivity is high. For organometallic reagents, the trifluoromethylating agent of the present invention, which is not a salt structure, clearly gave good results. In particular, in the Grignard reaction of Example 4 and Example 5 and Comparative Example 2, the trifluoromethylating agent (11) having a salt structure hardly formed trifluoromethylbenzene, whereas decomposition was preferred. The methylating agent (5) produced the desired product with a high yield of 31% when equimolar amount of the substrate was used and 24% when the substrate was increased to 1.5-fold mol. In the case of the trifluoromethylating agent (11) having a salt structure, the yield is not improved even if the substrate is increased.

以下、本発明を実施例及び比較例により更に説明するが、本発明は下記の例に何ら限定されるものではない。   EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further, this invention is not limited to the following example at all.

求電子的パーフルオロアルキル化剤の合成
まず、実施例1において、求電子的パーフルオロアルキル化剤としてトリフルオロメチル化剤(5)を合成した。
Synthesis of electrophilic perfluoroalkylating agent First, in Example 1, a trifluoromethylating agent (5) was synthesized as an electrophilic perfluoroalkylating agent.

<実施例1>(トリフルオロメチル化剤(5)の合成)
下記のように、チオサリチル酸メチル(o−メルカプト安息香酸メチル)(1)から、o−(トリフルオロメチルチオ)安息香酸メチル(2)(以下、スルフィド(2)と略記することがある。)を経て、o−(トリフルオロメチルスルフィニル)安息香酸メチル(3)(以下、スルホキシド(3)と略記することがある。)を合成し、これを加水分解してo−(トリフルオロメチルスルフィニル)安息香酸(4)(以下、スルホキシド−2(4)と略記することがある。)とした後、トリフルオロメチル化剤である1−オキソ−1−トリフルオロメチル−1λ6−ベンゾ[d]イソチアゾール−3−オン(5)を合成した。
<Example 1> (Synthesis of trifluoromethylating agent (5))
As described below, methyl thiosalicylate (methyl o-mercaptobenzoate) (1) to methyl o- (trifluoromethylthio) benzoate (2) (hereinafter sometimes abbreviated as sulfide (2)) may be used. Then, methyl o- (trifluoromethylsulfinyl) benzoate (3) (hereinafter sometimes abbreviated as sulfoxide (3)) was synthesized and hydrolyzed to o- (trifluoromethylsulfinyl) benzoic acid. After forming acid (4) (hereinafter sometimes abbreviated as sulfoxide-2 (4)), 1-oxo-1-trifluoromethyl-1λ 6 -benzo [d] iso which is a trifluoromethylating agent is used. Thiazol-3-one (5) was synthesized.

Figure 2005145917
Figure 2005145917

乾燥窒素雰囲気下で、水素化ナトリウムNaH18.1g(0.47mol)をDMF450mlに懸濁した溶液に、氷冷して攪拌しながらo−メルカプト安息香酸メチル(1)75.7g(0.45mol)を45分かけて滴下した後、更にそのまま0.5時間攪拌を続けた。反応系内を脱気減圧した後、トリフルオロヨードメタン106g(0.54mol)を系内に導入し、更に窒素ガスを加えて系内を常圧とした後、室温に昇温し、このまま4日間攪拌を続けた。   Under a dry nitrogen atmosphere, 75.7 g (0.45 mol) of methyl o-mercaptobenzoate (1) was added to a solution in which 18.1 g (0.47 mol) of sodium hydride was suspended in 450 ml of DMF with ice cooling and stirring. Was added dropwise over 45 minutes, and stirring was further continued for 0.5 hours. After degassing and depressurizing the reaction system, 106 g (0.54 mol) of trifluoroiodomethane was introduced into the system, nitrogen gas was further added to bring the system to normal pressure, and the temperature was raised to room temperature. Stirring was continued for days.

反応混合物を水にあけ、有機化合物をn−ヘキサンで抽出し、有機化合物層を水、次いで飽和食塩水で洗浄後、乾燥剤として無水硫酸マグネシウムを加えて水分を除去し、乾燥剤を濾別した後、溶媒を減圧下で留去して溶液を濃縮し、油状物を得た。この油状物を減圧蒸留で精製し、スルフィド(2)76.3g(外圧3mmHg下での沸点84℃)を無色油状物として得た(収率72%)。   The reaction mixture is poured into water, the organic compound is extracted with n-hexane, the organic compound layer is washed with water and then with saturated brine, and anhydrous magnesium sulfate is added as a desiccant to remove water, and the desiccant is filtered off. After that, the solvent was distilled off under reduced pressure and the solution was concentrated to obtain an oily substance. This oil was purified by distillation under reduced pressure to obtain 76.3 g of sulfide (2) (boiling point 84 ° C. under an external pressure of 3 mmHg) as a colorless oil (yield 72%).

スルフィド(2)35.4g(150mmol)を酢酸200mlに溶かした溶液を70℃に加熱し、攪拌しながらこの溶液に31質量%過酸化水素水21.4g(195mmol)を1時間かけて滴下し、更にその後液温を80℃前後に保って3時間攪拌を続けた。反応終了後、放冷し、温度が下がったところで反応液を氷水にあけ、有機化合物をジエチルエーテルで抽出し、有機化合物層を水で3回、重曹水で1回、飽和食塩水で1回洗浄後、乾燥剤として無水硫酸マグネシウムを加えて水分を除去し、乾燥剤を濾別した後、溶媒を減圧下で留去して溶液を濃縮し、スルホキシド(3)を主成分とする混合物37.3gを得た。   A solution obtained by dissolving 35.4 g (150 mmol) of sulfide (2) in 200 ml of acetic acid was heated to 70 ° C., and 21.4 g (195 mmol) of 31% by mass hydrogen peroxide was added dropwise to the solution over 1 hour with stirring. Further, stirring was continued for 3 hours while maintaining the liquid temperature at around 80 ° C. After completion of the reaction, the mixture was allowed to cool, and when the temperature dropped, the reaction solution was poured into ice water, the organic compound was extracted with diethyl ether, the organic compound layer was extracted three times with water, once with aqueous sodium bicarbonate, and once with saturated brine. After washing, anhydrous magnesium sulfate is added as a desiccant to remove moisture, the desiccant is filtered off, the solvent is distilled off under reduced pressure, the solution is concentrated, and a mixture 37 containing sulfoxide (3) as a main component 37 .3 g was obtained.

水酸化ナトリウム7.35g(177mmol)を水140mlに溶かした溶液を上記の混合物34.2g(136mmol)に加え、室温で1.5時間攪拌した。反応後の溶液に、氷冷しながら約18質量%に希釈した塩酸42mlをゆっくり滴下し、0.5時間攪拌後、析出した結晶を濾別して採取し、充分水洗した。採取した結晶は酢酸エチルに溶解させ、乾燥剤として無水硫酸マグネシウムを加えて水分を除去し、乾燥剤を濾別して除いた後、溶媒を減圧下で留去して溶液を濃縮し、スルホキシド−2(4)29.6g(スルフィド(2)に対する収率90%)を白色結晶として得た。   A solution obtained by dissolving 7.35 g (177 mmol) of sodium hydroxide in 140 ml of water was added to 34.2 g (136 mmol) of the above mixture, followed by stirring at room temperature for 1.5 hours. To the solution after the reaction, 42 ml of hydrochloric acid diluted to about 18% by mass with ice cooling was slowly added dropwise, and after stirring for 0.5 hour, the precipitated crystals were collected by filtration and sufficiently washed with water. The collected crystals were dissolved in ethyl acetate, anhydrous magnesium sulfate was added as a desiccant to remove moisture, the desiccant was filtered off and the solvent was distilled off under reduced pressure to concentrate the solution, and sulfoxide-2. (4) 29.6 g (90% yield based on sulfide (2)) was obtained as white crystals.

スルホキシド−2(4)2.27g(9.5mmol)をクロロホルム24mlに溶かした溶液に20%発煙硫酸6.0mlを加え、この溶液に室温で攪拌しながらアジ化ナトリウム1.39g(20.9mmol)を約10分かけて添加した後、攪拌しながら室温から50℃まで約1時間かけてゆっくり昇温し、そのまま2.5時間攪拌を続けた後、放冷した。   To a solution of 2.27 g (9.5 mmol) of sulfoxide-2 (4) in 24 ml of chloroform was added 6.0 ml of 20% fuming sulfuric acid, and 1.39 g (20.9 mmol) of sodium azide was stirred into this solution at room temperature. ) Was added over a period of about 10 minutes, the temperature was slowly raised from room temperature to 50 ° C. over about 1 hour with stirring, and stirring was continued for 2.5 hours, followed by cooling.

反応混合物を氷水にあけ、有機化合物を酢酸エチルで抽出し、有機化合物層を水、次いで飽和食塩水で洗浄後、乾燥剤として無水硫酸マグネシウムを加えて水分を除去し、乾燥剤を濾別した後、溶媒を減圧下で留去して溶液を濃縮し、油状物を得た。得られた粗生成物をシリカゲルによるカラムクロマトグラフィ(展開溶媒として、酢酸エチル:ヘキサン=1:2の体積比で混合した酢酸エチルとヘキサンとの混合溶媒を用いる。)で精製し、トリフルオロメチル化剤(5)1.32g(収率59%)を白色結晶として得た。   The reaction mixture was poured into ice water, the organic compound was extracted with ethyl acetate, the organic compound layer was washed with water and then with saturated brine, anhydrous magnesium sulfate was added as a desiccant to remove water, and the desiccant was filtered off. Thereafter, the solvent was distilled off under reduced pressure, and the solution was concentrated to obtain an oily substance. The resulting crude product is purified by column chromatography on silica gel (using a mixed solvent of ethyl acetate and hexane mixed in a volume ratio of ethyl acetate: hexane = 1: 2 as a developing solvent), and trifluoromethylated. 1.32 g (yield 59%) of agent (5) was obtained as white crystals.

スルフィド(2)、スルホキシド(3)、スルホキシド−2(4)及びトリフルオロメチル化剤(5)のスペクトルデータを以下に示す。   The spectral data of sulfide (2), sulfoxide (3), sulfoxide-2 (4) and trifluoromethylating agent (5) are shown below.

o−(トリフルオロメチルチオ)安息香酸メチル(スルフィド)(2):
19F-NMR(CDCl3;内部標準CFCl3):-41.9ppm(3F,s)
1H-NMR(CDCl3):3.95ppm(3H,s), 7.44ppm(1H,t,m,J=8Hz), 7.55ppm(1H,t,d,J=8Hz,2Hz), 7.74ppm(1H,d,m,J=8Hz), 7.93ppm(1H,d,d,J=8Hz,2Hz)
o- (Trifluoromethylthio) methyl benzoate (sulfide) (2):
19 F-NMR (CDCl 3 ; internal standard CFCl 3 ): -41.9 ppm (3F, s)
1 H-NMR (CDCl 3 ): 3.95 ppm (3H, s), 7.44 ppm (1 H, t, m, J = 8 Hz), 7.55 ppm (1 H, t, d, J = 8 Hz, 2 Hz), 7.74 ppm ( 1H, d, m, J = 8Hz), 7.93ppm (1H, d, d, J = 8Hz, 2Hz)

o−(トリフルオロメチルスルフィニル)安息香酸メチル(スルホキシド)(3):
19F-NMR(CDCl3;内部標準CFCl3):-71.2ppm(3F,s)
1H-NMR(CDCl3):3.99ppm(3H,s), 7.72ppm(1H,t,d,J=8Hz,1Hz), 7.89ppm(1H,t,d,J=8Hz,1Hz), 8.18ppm(1H,d,d,J=8Hz,1Hz), 8.33ppm(1H,d,d,J=8Hz,1Hz)
o- (Trifluoromethylsulfinyl) benzoic acid methyl (sulfoxide) (3):
19 F-NMR (CDCl 3 ; internal standard CFCl 3 ): -71.2 ppm (3F, s)
1 H-NMR (CDCl 3 ): 3.99 ppm (3H, s), 7.72 ppm (1 H, t, d, J = 8 Hz, 1 Hz), 7.89 ppm (1 H, t, d, J = 8 Hz, 1 Hz), 8.18 ppm (1H, d, d, J = 8Hz, 1Hz), 8.33ppm (1H, d, d, J = 8Hz, 1Hz)

o−(トリフルオロメチルスルフィニル)安息香酸(スルホキシド−2)(4):
19F-NMR(CDCl3;内部標準CFCl3):-71.0ppm(3F,s)
1H-NMR(CDCl3):7.78ppm(1H,t,d,J=8Hz,1Hz), 7.97ppm(1H,t,d,J=8Hz,1Hz), 8.31ppm(1H,d,d,J=8Hz,1Hz), 8.38ppm(1H,d,d,J=8Hz,1Hz), 8.5〜9.5ppm(1H,br.s)
o- (Trifluoromethylsulfinyl) benzoic acid (sulfoxide-2) (4):
19 F-NMR (CDCl 3 ; internal standard CFCl 3 ): -71.0 ppm (3F, s)
1 H-NMR (CDCl 3 ): 7.78 ppm ( 1 H, t, d, J = 8 Hz, 1 Hz), 7.97 ppm (1 H, t, d, J = 8 Hz, 1 Hz), 8.31 ppm (1 H, d, d, J = 8Hz, 1Hz), 8.38ppm (1H, d, d, J = 8Hz, 1Hz), 8.5-9.5ppm (1H, br.s)

1−オキソ−1−トリフルオロメチル−1λ6−ベンゾ[d]イソチアゾール-3-オン(5)(トリフルオロメチル化剤(5)):
19F-NMR(CDCl3;内部標準CFCl3):-73.9ppm(3F,s)
1H-NMR(CD3CN):8.03ppm(1H,t,d,J=8Hz,1.5Hz), 8.13ppm(1H,t,d,J=8Hz,1Hz), 8.16ppm(1H,d,d,d,J=8Hz,1.5Hz,0.7Hz), 8.27ppm(1H,d,m,J=8Hz)
1-oxo-1-trifluoromethyl-1λ 6 -benzo [d] isothiazol-3-one (5) (trifluoromethylating agent (5)):
19 F-NMR (CDCl 3 ; internal standard CFCl 3 ): -73.9 ppm (3F, s)
1 H-NMR (CD 3 CN): 8.03 ppm (1 H, t, d, J = 8 Hz, 1.5 Hz), 8.13 ppm (1 H, t, d, J = 8 Hz, 1 Hz), 8.16 ppm (1 H, d, d, d, J = 8Hz, 1.5Hz, 0.7Hz), 8.27ppm (1H, d, m, J = 8Hz)

<合成例1>(トリフルオロメチル化剤(7)の合成)
下記のように、S−トリフルオロメチル-S-フェニルスルホキシイミド(6)より、トリフルオロメチル化剤であるN−トリフルオロメチルスルホニル−S−トリフルオロメチル−S−フェニルスルホキシイミド(7)を合成した。なお、イミド(6)は、公知の方法(N.V.Kondratenko et al., J.Org.Chem.USSR., 1984,20(10),2051)で合成できる。
<Synthesis Example 1> (Synthesis of trifluoromethylating agent (7))
As described below, from S-trifluoromethyl-S-phenylsulfoxyimide (6), N-trifluoromethylsulfonyl-S-trifluoromethyl-S-phenylsulfoxyimide (7) which is a trifluoromethylating agent ) Was synthesized. The imide (6) can be synthesized by a known method (NV Kondratenko et al., J. Org. Chem. USSR., 1984, 20 (10), 2051).

Figure 2005145917
Figure 2005145917

乾燥窒素雰囲気下で、氷冷したイミド(6)837mg(4mmol)を塩化メチレン8mlに溶かした溶液中に、攪拌しながらピリジン475mg(6mmol)をゆっくり滴下し、続いてトリフルオロメタンスルホン酸無水物3.39g(12mmol)をゆっくり滴下して、その後室温で1時間攪拌した。   Under a dry nitrogen atmosphere, 475 mg (6 mmol) of pyridine was slowly added dropwise with stirring to a solution of 837 mg (4 mmol) of imide (6) cooled with ice in 8 ml of methylene chloride, followed by trifluoromethanesulfonic anhydride 3 .39 g (12 mmol) was slowly added dropwise and then stirred at room temperature for 1 hour.

反応液を氷水にあけ、有機化合物を塩化メチレンで抽出し、有機化合物層を水で1回、次いで飽和食塩水で1回洗浄後、乾燥剤として無水硫酸マグネシウムを加えて水分を除去し、乾燥剤を濾別した後、溶媒を減圧下で留去して溶液を濃縮し、N−トリフルオロメチルスルホニル−S−トリフルオロメチル−S−フェニルスルホキシイミド(7)1.28g(収率93%)を黄白色結晶として得た。そのスペクトルデータを以下に示す。   The reaction solution is poured into ice water, the organic compound is extracted with methylene chloride, the organic compound layer is washed once with water and then once with a saturated saline solution, and anhydrous magnesium sulfate is added as a desiccant to remove the water, followed by drying. After the agent was filtered off, the solvent was distilled off under reduced pressure to concentrate the solution, and 1.28 g of N-trifluoromethylsulfonyl-S-trifluoromethyl-S-phenylsulfoxyimide (7) (yield 93). %) As yellowish white crystals. The spectrum data is shown below.

N−トリフルオロメチルスルホニル−S−トリフルオロメチル−S−フェニルスルホキシイミド(7):
19F-NMR(CDCl3;内部標準CFCl3):-75.7ppm(3F,s), -79.0ppm(3F,s)
1H-NMR(CDCl3):7.80ppm(2H,t,m,J=8Hz), 7.98ppm(1H,t,m,J=8Hz), 8.16ppm(2H,d,J=8Hz)
N-trifluoromethylsulfonyl-S-trifluoromethyl-S-phenylsulfoxyimide (7):
19 F-NMR (CDCl 3 ; internal standard CFCl 3 ): -75.7 ppm (3F, s), -79.0 ppm (3F, s)
1 H-NMR (CDCl 3 ): 7.80 ppm (2H, t, m, J = 8 Hz), 7.98 ppm (1 H, t, m, J = 8 Hz), 8.16 ppm (2H, d, J = 8 Hz)

<合成例2>(トリフルオロメチル化剤(8)の合成)
下記のように、S−トリフルオロメチル−S−フェニルスルホキシイミド(6)より、トリフルオロメチル化剤であるN−ベンゾイル−S−トリフルオロメチル−S−フェニルスルホキシイミド(8)を合成した。
<Synthesis Example 2> (Synthesis of trifluoromethylating agent (8))
As shown below, N-benzoyl-S-trifluoromethyl-S-phenylsulfoxyimide (8), which is a trifluoromethylating agent, is synthesized from S-trifluoromethyl-S-phenylsulfoxyimide (6). did.

Figure 2005145917
Figure 2005145917

乾燥窒素雰囲気下で、氷冷したイミド(6)837mg(4mmol)を塩化メチレン8mlに溶かした溶液中に、攪拌しながらトリエチルアミン486mg(4.8mmol)をゆっくり滴下し、続いてベンゾイルクロリド557μl(4.8mmol)をゆっくり滴下して、その後室温で一晩攪拌した。   Under a dry nitrogen atmosphere, 486 mg (4.8 mmol) of triethylamine was slowly added dropwise with stirring to 837 mg (4 mmol) of ice-cooled imide (6) in 8 ml of methylene chloride, followed by 557 μl (4 of benzoyl chloride). .8 mmol) was slowly added dropwise and then stirred overnight at room temperature.

反応液を氷水にあけ、有機化合物を酢酸エチルで抽出し、有機化合物層を水で2回、次いで飽和食塩水で1回洗浄後、乾燥剤として無水硫酸マグネシウムを加えて水分を除去し、乾燥剤を濾別した後、溶媒を減圧下で留去して溶液を濃縮し、油状物を得た。これをシリカゲルによるカラムクロマトグラフィ(展開溶媒として、酢酸エチルとヘキサンとの混合溶媒を、混合体積比を酢酸エチル:ヘキサン=1:7→1:5→1:3と変えて用いた。)で精製し、N-ベンゾイル-S-トリフルオロメチル-S-フェニルスルホキシイミド(8)1.20g(収率96%)を無色油状物として得た。そのスペクトルデータを以下に示す。   The reaction solution is poured into ice water, the organic compound is extracted with ethyl acetate, the organic compound layer is washed twice with water and then once with saturated brine, and then anhydrous magnesium sulfate is added as a desiccant to remove moisture, followed by drying. After the agent was filtered off, the solvent was distilled off under reduced pressure, and the solution was concentrated to obtain an oil. This was purified by column chromatography on silica gel (as a developing solvent, a mixed solvent of ethyl acetate and hexane was used with the mixing volume ratio changed from ethyl acetate: hexane = 1: 7 → 1: 5 → 1: 3). As a result, 1.20 g (yield 96%) of N-benzoyl-S-trifluoromethyl-S-phenylsulfoxyimide (8) was obtained as a colorless oil. The spectrum data is shown below.

N−ベンゾイル−S−トリフルオロメチル−S−フェニルスルホキシイミド(8):
19F-NMR(CDCl3;内部標準CFCl3):-75.0ppm(3F,s)
1H-NMR(CDCl3):7.46ppm(2H,t,m,J=8Hz), 7.58ppm(1H,t,m,J=8Hz), 7.70ppm(2H,t,m,J=8Hz), 7.84ppm(1H,t,m,J=8Hz), 8.12ppm(2H,d,J=8Hz), 8.19ppm(2H,d,m,J=8Hz)
N-benzoyl-S-trifluoromethyl-S-phenylsulfoxyimide (8):
19 F-NMR (CDCl 3 ; internal standard CFCl 3 ): -75.0 ppm (3F, s)
1 H-NMR (CDCl 3 ): 7.46 ppm (2H, t, m, J = 8 Hz), 7.58 ppm (1 H, t, m, J = 8 Hz), 7.70 ppm (2H, t, m, J = 8 Hz) , 7.84ppm (1H, t, m, J = 8Hz), 8.12ppm (2H, d, J = 8Hz), 8.19ppm (2H, d, m, J = 8Hz)

トリフルオロメチル化反応の実施例
次に、実施例2〜12において、実施例1と合成例1及び合成例2で合成したトリフルオロメチル化剤(5)及び(7)及び(8)を種々の基質分子に作用させ、トリフルオロメチル化反応を行った。実施例2〜12において用いられた基質分子、トリフルオロメチル化剤、生成物及び反応の収率を下記の表1に示す。収率はベンゾトリフルオリド(ベンジリジントリフルオリド)もしくはトリフルオロメトキシベンゼンを内部標準として、いずれも19F−NMRで決定した。
Examples of Trifluoromethylation Reaction Next, in Examples 2 to 12, various trifluoromethylating agents (5), (7) and (8) synthesized in Example 1, Synthesis Example 1 and Synthesis Example 2 were used. The trifluoromethylation reaction was carried out by acting on the substrate molecule. The substrate molecules, trifluoromethylating agents, products, and reaction yields used in Examples 2-12 are shown in Table 1 below. Yields were determined by 19 F-NMR, using benzotrifluoride (benzylidine trifluoride) or trifluoromethoxybenzene as an internal standard.

Figure 2005145917
Figure 2005145917

また、上記のトリフルオロメチル化の反応条件として、基質分子とトリフルオロメチル化剤とのモル比、溶媒(但し、THFはテトラヒドロフラン、HMPAはヘキサメチルホスホルアミド、DMFはジメチルホルムアミド)及び反応温度を表2に示す。   The reaction conditions for the above trifluoromethylation include the molar ratio of the substrate molecule to the trifluoromethylating agent, the solvent (however, THF is tetrahydrofuran, HMPA is hexamethylphosphoramide, DMF is dimethylformamide), and the reaction temperature. Is shown in Table 2.

Figure 2005145917
Figure 2005145917

代表的な例として実施例2、4、9及び12の詳細を以下に説明する。   Details of Examples 2, 4, 9 and 12 will be described below as representative examples.

<実施例2>
フェニルアセチレン511mg(5mmol)のTHF2.3ml溶液に−78℃下、n−ブチルリチウムのn−ヘキサン溶液(1.49M濃度)3.36ml(5mmol)を滴下、その後約1時間かけて室温まで昇温することにより、0.8M濃度のフェニルエチニルリチウム溶液を調製した。
<Example 2>
To a solution of 511 mg (5 mmol) of phenylacetylene in 2.3 ml of THF, 3.36 ml (5 mmol) of n-butyllithium in n-hexane (1.49 M concentration) was added dropwise at −78 ° C., and the temperature was raised to room temperature over about 1 hour. By heating, a 0.8M phenylethynyllithium solution was prepared.

トリフルオロメチル化剤(5)59mg(0.25mmol)のTHF0.5ml溶液に、上記で調製した0.8Mの濃度フェニルエチニルリチウム溶液313μl(C65Li含量0.25mmol)を、−70℃にて攪拌しながら2分間で滴下し、その後−70℃から室温まで約1時間かけて昇温、さらに0.5時間攪拌を続けた。 To a solution of 59 mg (0.25 mmol) of the trifluoromethylating agent (5) in 0.5 ml of THF, 313 μl of the 0.8M-concentrated phenylethynyllithium solution (C 6 H 5 C 2 Li content 0.25 mmol) prepared above was added. The mixture was added dropwise over 2 minutes while stirring at -70 ° C, and then the temperature was raised from -70 ° C to room temperature over about 1 hour, followed by further stirring for 0.5 hour.

反応混合物にNMRの内部標準としてベンゾトリフルオリド36.5mg(0.25mmol)を加え、充分攪拌したのち反応液の一部を抜き取り、重クロロホルムで希釈して19F−NMRで定量したところ、目的のフェニルトリフルオロメチルアセチレンが73%の収率で生成していた。生成物の同定は、別途合成したフェニルトリフルオロメチルアセチレンを標準品とし、19F−NMRスペクトル及びガスクロマトグラフィによるクロマトグラムを標準品と比較することによって確認した。 To the reaction mixture, 36.5 mg (0.25 mmol) of benzotrifluoride was added as an NMR internal standard, and after sufficient stirring, a part of the reaction solution was extracted, diluted with deuterated chloroform, and quantified by 19 F-NMR. Of phenyltrifluoromethylacetylene was produced in a yield of 73%. Identification of the product was confirmed by comparing separately synthesized phenyltrifluoromethylacetylene with 19 F-NMR spectrum and gas chromatography chromatogram as a standard product.

<実施例4>
THF:HMPA=1:3の体積比で混合したTHFとHMPAとの混合溶媒0.8mlにトリフルオロメチル化剤(5)94mg(0.4mmol)を溶かした溶液に、臭化フェニルマグネシウムのTHF溶液(0.68M濃度)0.59ml(C65MgBr含量 0.4mmol)を、−25〜−30℃にて攪拌しながら4分間で滴下し、その後−30℃から室温まで約1時間かけて昇温し、そのまま1時間攪拌を続けた。
<Example 4>
In a solution of 94 mg (0.4 mmol) of the trifluoromethylating agent (5) in 0.8 ml of a mixed solvent of THF and HMPA mixed at a volume ratio of THF: HMPA = 1: 3, THF of phenylmagnesium bromide was added. 0.59 ml of a solution (0.68 M concentration) (C 6 H 5 MgBr content 0.4 mmol) was added dropwise over 4 minutes with stirring at −25 to −30 ° C., and then about −1 hour from −30 ° C. to room temperature. The temperature was raised over time and stirring was continued for 1 hour.

反応混合物にNMRの内部標準としてトリフルオロメトキシベンゼン32.4mg(0.2mmol)を加え、充分攪拌したのち反応液の一部を抜き取り、重クロロホルムで希釈して19F−NMRで定量したところ、ベンゾトリフルオリドが24%の収率で生成していることがわかった。生成物の同定は、市販のベンゾトリフルオリドを標準品とし、19F−NMRスペクトル及びガスクロマトグラフィによるクロマトグラムを標準品と比較することによって確認した。 To the reaction mixture, 32.4 mg (0.2 mmol) of trifluoromethoxybenzene was added as an NMR internal standard, and after sufficiently stirring, a part of the reaction solution was extracted, diluted with deuterated chloroform, and quantified by 19 F-NMR. It was found that benzotrifluoride was produced in a yield of 24%. The product was identified by comparing a 19 F-NMR spectrum and a chromatogram obtained by gas chromatography with a standard product using commercially available benzotrifluoride as a standard product.

<実施例9>
N−ピロリジノ−1−シクロヘキセン 61mg(0.4mmol)を溶解したTHF0.8ml溶液に、−78℃下、トリフルオロメチル化剤(5)94mg(0.4mmol)を加え、攪拌下室温まで6時間かけてゆっくり昇温、さらに室温で一晩攪拌した。この反応混合物を氷冷し、ここに濃塩酸0.5mlを加えた後、さらに室温で一晩攪拌した。
<Example 9>
To a 0.8 ml THF solution in which 61 mg (0.4 mmol) of N-pyrrolidino-1-cyclohexene was dissolved, 94 mg (0.4 mmol) of the trifluoromethylating agent (5) was added at −78 ° C. and stirred for 6 hours to room temperature. The mixture was slowly warmed up and stirred overnight at room temperature. The reaction mixture was ice-cooled, 0.5 ml of concentrated hydrochloric acid was added thereto, and the mixture was further stirred overnight at room temperature.

反応混合物にNMRの内部標準としてベンゾトリフルオリド29.2mg(0.2mmol)を加え充分攪拌したのち反応液の一部を抜き取り、重アセトニトリルで希釈して19F−NMRで定量したところ、2−トリフルオロメチルシクロヘキサノンが26%、2,6−ジトリフルオロメチルシクロヘキサノンが7%の収率で生成していることがわかった。生成物の同定は、別途合成した2−トリフルオロメチルシクロヘキサノン及び、2,6−ジトリフルオロメチルシクロヘキサノンを標準品とし、19F−NMRスペクトル及びガスクロマトグラフィによるクロマトグラムを標準品と比較することによって確認した。 After adding 29.2 mg (0.2 mmol) of benzotrifluoride as an NMR internal standard to the reaction mixture and stirring sufficiently, a part of the reaction solution was extracted, diluted with deuterated acetonitrile, and quantified by 19 F-NMR. It was found that trifluoromethylcyclohexanone was produced in a yield of 26% and 2,6-ditrifluoromethylcyclohexanone in a yield of 7%. Identification of the product is confirmed by comparing separately synthesized 2-trifluoromethylcyclohexanone and 2,6-ditrifluoromethylcyclohexanone with 19 F-NMR spectrum and gas chromatograph chromatogram. did.

<実施例12>
水素化ナトリウム(62.5%in oil)16mg(0.4mmol)のDMF0.8ml懸濁液に氷冷下、2−メルカプトビフェニル75mg(0.4mmol)を加え、氷冷下15分さらに室温で0.5時間攪拌した。この反応混合物を氷冷し、ここに、トリフルオロメチル化剤(5)94mg(0.4mmol)を加え、そのまま15分間、さらに室温に昇温し、0.5時間攪拌を続けた。
<Example 12>
To a suspension of 16 mg (0.4 mmol) of sodium hydride (62.5% in oil) in DMF (0.8 ml), 75 mg (0.4 mmol) of 2-mercaptobiphenyl was added under ice cooling, and the mixture was further cooled at room temperature for 15 minutes under ice cooling. Stir for 0.5 hour. The reaction mixture was ice-cooled, 94 mg (0.4 mmol) of the trifluoromethylating agent (5) was added thereto, and the temperature was raised to room temperature for 15 minutes, and stirring was continued for 0.5 hour.

反応混合物にNMRの内部標準としてベンゾトリフルオリド29.2mg(0.2mmol)を加え充分攪拌したのち反応液の一部を抜き取り、重クロロホルムで希釈して19F-NMRで定量したところ、2−(トリフルオロメチルチオ)ビフェニルが70%の収率で生成していることがわかった。生成物の同定は、別途合成した2−(トリフルオロメチルチオ)ビフェニルを標準品とし、19F−NMRスペクトル及びガスクロマトグラフィによるクロマトグラムを標準品と比較することによって確認した。 After adding 29.2 mg (0.2 mmol) of benzotrifluoride as an NMR internal standard to the reaction mixture and stirring sufficiently, a part of the reaction solution was extracted, diluted with deuterated chloroform, and quantified by 19 F-NMR. It was found that (trifluoromethylthio) biphenyl was produced in a yield of 70%. Identification of the product was confirmed by comparing separately synthesized 2- (trifluoromethylthio) biphenyl with a standard product and comparing the 19 F-NMR spectrum and gas chromatogram with the standard product.

実施例3は基質を表1記載の化合物に変えた他は、実施例2と同様にトリフルオロメチル化反応を行った。   In Example 3, the trifluoromethylation reaction was performed in the same manner as in Example 2 except that the substrate was changed to the compounds shown in Table 1.

実施例5、6、7、8は基質や基質の当量、及びトリフルオロメチル化剤を表1及び表2記載の条件に従って変えた他は、実施例4と同様にトリフルオロメチル化反応を行った。   In Examples 5, 6, 7, and 8, the trifluoromethylation reaction was performed in the same manner as in Example 4 except that the substrate, the equivalent of the substrate, and the trifluoromethylating agent were changed according to the conditions described in Tables 1 and 2. It was.

実施例10は基質を表1記載の化合物に変えた他は、実施例12と同様にトリフルオロメチル化反応を行った。   In Example 10, the trifluoromethylation reaction was performed in the same manner as in Example 12 except that the substrate was changed to the compounds shown in Table 1.

実施例11はトリフルオロメチル化剤を表1記載の化合物に変え、攪拌時間を0.5時間から12時間に延長した他は、実施例12と同様にトリフルオロメチル化反応を行った。   In Example 11, the trifluoromethylation reaction was carried out in the same manner as in Example 12 except that the trifluoromethylating agent was changed to the compounds shown in Table 1 and the stirring time was extended from 0.5 hour to 12 hours.

<トリフルオロメチル化反応の比較例>
比較例1及び2として、下記の化学式で示され、塩構造を有する既述した特許文献1によるトリフルオロメチル化剤(9)を用いてトリフルオロメチル化反応を行った結果とその際の反応条件とを、表3と4にそれぞれ示す。比較例1及び2は、いずれも、トリフルオロメチル化剤(5)または(7)の代わりにトリフルオロメチル化剤(9)を用いた以外は、同じ基質を用いた実施例2及び実施例4と6と同様にトリフルオロメチル化反応を行った。
<Comparative example of trifluoromethylation reaction>
As Comparative Examples 1 and 2, the result of the trifluoromethylation reaction using the trifluoromethylating agent (9) according to Patent Document 1 described above having the salt structure represented by the following chemical formula and the reaction at that time The conditions are shown in Tables 3 and 4, respectively. Comparative Examples 1 and 2 were both Examples 2 and Examples using the same substrate except that the trifluoromethylating agent (9) was used instead of the trifluoromethylating agent (5) or (7). A trifluoromethylation reaction was carried out in the same manner as in 4 and 6.

Figure 2005145917
Figure 2005145917

Figure 2005145917
Figure 2005145917

Figure 2005145917
Figure 2005145917

基質としてフェニルエチニルリチウムを用いた実施例2と比較例1とを比べると、トリフルオロメチル化剤(9)を用いた比較例1では収率が58%にとどまっているのに対し、本発明に基づくトリフルオロメチル化剤(5)を用いた実施例2では収率が73%に達しており、本発明に基づくトリフルオロメチル化剤(5)の優位性がわかる。   When Example 2 using phenylethynyllithium as a substrate is compared with Comparative Example 1, the yield is only 58% in Comparative Example 1 using the trifluoromethylating agent (9). In Example 2 using the trifluoromethylating agent (5) based on the above, the yield reached 73%, which shows the superiority of the trifluoromethylating agent (5) based on the present invention.

基質として臭化フェニルマグネシウムを用いた実施例4、5及び6と比較例2とではその差はもっと顕著であり、トリフルオロメチル化剤(9)を用いた比較例2では収率がわずか3%にすぎないのに対し、本発明に基づくトリフルオロメチル化剤(5)用いた実施例4では収率が24%に達し、トリフルオロメチル化剤(7)を用いた実施例6でも収率が15%である。さらに実施例5で臭化フェニルマグネシウムをトリフルオロメチル化剤(5)に対し、1.5倍モル用いたところ収率は32%にまで向上した。トリフルオロメチル化剤(7)の場合は、等モルの基質でトリフルオロメチル化剤が消費されるため、基質を増やしても収率の向上は認められない。以上より、本発明に基づくトリフルオロメチル化剤(5)の圧倒的な優位性がわかる。   The difference between Examples 4, 5, and 6 using phenylmagnesium bromide as a substrate and Comparative Example 2 is more remarkable, and the yield of Comparative Example 2 using the trifluoromethylating agent (9) is only 3 On the other hand, in Example 4 using the trifluoromethylating agent (5) according to the present invention, the yield reached 24%, and also in Example 6 using the trifluoromethylating agent (7). The rate is 15%. Furthermore, in Example 5, when 1.5 times mole of phenylmagnesium bromide was used with respect to the trifluoromethylating agent (5), the yield was improved to 32%. In the case of the trifluoromethylating agent (7), since the trifluoromethylating agent is consumed with an equimolar amount of the substrate, no increase in yield is observed even if the substrate is increased. From the above, the overwhelming superiority of the trifluoromethylating agent (5) based on the present invention can be seen.

このように、本発明に基づくトリフルオロメチル化剤によれば、単にトリフルオロメチル化反応の収率が改善されるばかりではなく、従来は収率の悪さから実質的には断念せざるを得なかったトリフルオロメチル化反応も実現可能となり、更には新規なトリフルオロメチル化有機化合物の合成にも道を開くものである。また、ここではトリフルオロメチル化を例に説明したが、トリフルオロメチル化と一般的なパーフルオロアルキル化に本質的な違いはなく、一般的なパーフルオロアルキル化についても同様であることは言うまでもない。   As described above, according to the trifluoromethylating agent based on the present invention, not only the yield of the trifluoromethylation reaction is improved, but in the past, it has been substantially abandoned due to the poor yield. The new trifluoromethylation reaction can be realized, and further opens the way to the synthesis of new trifluoromethylated organic compounds. Although trifluoromethylation is described here as an example, it is needless to say that there is no essential difference between trifluoromethylation and general perfluoroalkylation, and the same applies to general perfluoroalkylation. Yes.

以上、本発明を実施の形態及び実施例に基づいて説明したが、本発明はこれらの例に何ら限定されるものではなく、発明の主旨を逸脱しない範囲で適宜変更可能であることは言うまでもない。   As mentioned above, although this invention was demonstrated based on embodiment and an Example, this invention is not limited to these examples at all, and it cannot be overemphasized that it can change suitably in the range which does not deviate from the main point of invention. .

本発明の求電子的パーフルオロアルキル化剤、及びパーフルオロアルキル化有機化合物の製造方法は、医薬・農薬中間体や液晶材料、電解液などの機能性材料の合成に有用なパーフルオロアルキル化有機化合物を従来よりも高い収率で合成できるばかりではなく、従来実質的に製造が不可能であった新規で有用なパーフルオロアルキル化有機化合物の製造にも道を開くものである。   The electrophilic perfluoroalkylating agent and the method for producing a perfluoroalkylated organic compound of the present invention are useful for synthesizing functional materials such as pharmaceutical / pesticidal intermediates, liquid crystal materials, and electrolytes. In addition to being able to synthesize compounds at higher yields than conventional, it also opens the way to the production of new and useful perfluoroalkylated organic compounds that have heretofore been virtually impossible to produce.

Claims (6)

下記の一般式(1)で表される求電子的パーフルオロアルキル化剤。
一般式(1):
Figure 2005145917
(式中、Aはカルボニル基−CO−又はスルホニル基−SO2−を表し、R1、R2、R3及びR4は同一の若しくは異なる基であって、水素原子、ハロゲン原子、ニトロ基、シアノ基、炭素数6から10のアリール基、炭素数1から5のアルキル基、炭素数1から5のハロアルキル基、炭素数1から5のアルコキシ基、炭素数2から6のアルコキシカルボニル基、又は炭素数3から7のカルバモイル基を表し、R1とR2、R2とR3、又はR3とR4とが結合して環状構造を成してもよく、その環は芳香環であってもよい。Rfは炭素数1から20のパーフルオロアルキル基を示す。)
An electrophilic perfluoroalkylating agent represented by the following general formula (1).
General formula (1):
Figure 2005145917
(In the formula, A represents a carbonyl group —CO— or a sulfonyl group —SO 2 —, and R 1 , R 2 , R 3 and R 4 are the same or different groups, and are a hydrogen atom, a halogen atom or a nitro group. , A cyano group, an aryl group having 6 to 10 carbon atoms, an alkyl group having 1 to 5 carbon atoms, a haloalkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkoxycarbonyl group having 2 to 6 carbon atoms, Or a carbamoyl group having 3 to 7 carbon atoms, and R 1 and R 2 , R 2 and R 3 , or R 3 and R 4 may be bonded to form a cyclic structure, and the ring is an aromatic ring Rf represents a perfluoroalkyl group having 1 to 20 carbon atoms.)
下記の一般式(2)で表される、請求項1に記載した求電子的パーフルオロアルキル化剤。
一般式(2):
Figure 2005145917
(式中、R1、R2、R3及びR4は、前記したものと同じものである。)
The electrophilic perfluoroalkylating agent represented by the following general formula (2) according to claim 1.
General formula (2):
Figure 2005145917
(Wherein R 1 , R 2 , R 3 and R 4 are the same as those described above.)
下記の一般式(3)で表される求電子的パーフルオロアルキル化剤。
一般式(3):
Figure 2005145917
(式中、Aは、カルボニル基−CO−又はスルホニル基−SO2−を表し、R5及びR6は同一の若しくは異なる基であって、置換基を有してもよい炭素数6から20のアリール基、置換基を有してもよい炭素数1から10のアルキル基、又は置換基を有してもよい炭素数1から10のハロアルキル基を表し、Rfは炭素数1から20のパーフルオロアルキル基を示す。)
An electrophilic perfluoroalkylating agent represented by the following general formula (3).
General formula (3):
Figure 2005145917
(In the formula, A represents a carbonyl group —CO— or a sulfonyl group —SO 2 —, and R 5 and R 6 are the same or different groups and may have a substituent having 6 to 20 carbon atoms. An aryl group, an optionally substituted alkyl group having 1 to 10 carbon atoms, or an optionally substituted haloalkyl group having 1 to 10 carbon atoms, wherein Rf is a par 1 to 20 carbon atoms. Represents a fluoroalkyl group.)
下記の一般式(4)で表される求電子的パーフルオロアルキル化剤。
一般式(4)
Figure 2005145917
(式中、A1及びA2は同一の若しくは異なる基であって、カルボニル基−CO−又はスルホニル基−SO2−を表し、R7、R8及びR9は同一の若しくは異なる基であって、置換基を有してもよい炭素数6から20のアリール基、置換基を有してもよい炭素数1から10のアルキル基、又は置換基を有してもよい炭素数1から10のハロアルキル基を表し、Rfは炭素数1から20のパーフルオロアルキル基を示す。)
An electrophilic perfluoroalkylating agent represented by the following general formula (4).
General formula (4)
Figure 2005145917
(In the formula, A 1 and A 2 are the same or different groups and represent a carbonyl group —CO— or a sulfonyl group —SO 2 —, and R 7 , R 8 and R 9 are the same or different groups. An aryl group having 6 to 20 carbon atoms which may have a substituent, an alkyl group having 1 to 10 carbon atoms which may have a substituent, or 1 to 10 carbon atoms which may have a substituent. Rf represents a perfluoroalkyl group having 1 to 20 carbon atoms.)
前記Rfがトリフルオロメチル基である、請求項1〜4のいずれか1項に記載した求電子的パーフルオロアルキル化剤。   The electrophilic perfluoroalkylating agent according to any one of claims 1 to 4, wherein Rf is a trifluoromethyl group. 請求項1〜5のいずれか1項に記載した求電子的パーフルオロアルキル化剤を用いてパーフルオロアルキル化反応を行う工程を有する、パーフルオロアルキル化有機化合物の製造方法。   The manufacturing method of the perfluoroalkylation organic compound which has the process of performing a perfluoroalkylation reaction using the electrophilic perfluoroalkylating agent described in any one of Claims 1-5.
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JP2008214281A (en) * 2007-03-05 2008-09-18 Nagoya Institute Of Technology New electrophilic perfluoroalkylating agent
CN104817438A (en) * 2015-02-25 2015-08-05 上海万溯化学有限公司 Alkylation method of fluorine-containing aryl halid

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008214281A (en) * 2007-03-05 2008-09-18 Nagoya Institute Of Technology New electrophilic perfluoroalkylating agent
CN104817438A (en) * 2015-02-25 2015-08-05 上海万溯化学有限公司 Alkylation method of fluorine-containing aryl halid

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