JP2002060381A5 - - Google Patents

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JP2002060381A5
JP2002060381A5 JP2000246948A JP2000246948A JP2002060381A5 JP 2002060381 A5 JP2002060381 A5 JP 2002060381A5 JP 2000246948 A JP2000246948 A JP 2000246948A JP 2000246948 A JP2000246948 A JP 2000246948A JP 2002060381 A5 JP2002060381 A5 JP 2002060381A5
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carbon atoms
functional group
heterocycle
heterocyclic
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JP2002060381A (en
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【特許請求の範囲】
【請求項1】 複素環上に官能基を有する炭素数4〜20の複素環式化合物を、ハイドロクロロカーボン類、ハイドロクロロフルオロカーボン類、ハイドロフルオロカーボン類、ペルフルオロエーテル類またはペルフルオロカーボン類より選択された溶媒に溶解させて得られる溶液を反応容器内に用意し、フッ素ガスを反応容器内の気相に吹き込んでフッ素ガスを間接的に反応容器内の液相に導入し、液相温度を−30℃〜10℃に維持しつつ反応させ、該複素環上の官能基の結合した炭素原子及びヘテロ原子のそれぞれを除く複素環構成炭素原子の内の1つに選択的に1個のフッ素を導入したモノフルオロ複素環式化合物を製造することを特徴とする複素環上に官能基を有する複素環式化合物のフッ素化方法。
【請求項2】 複素環上に官能基を有する炭素数4〜20の複素環式化合物を、ハイドロクロロカーボン類、ハイドロクロロフルオロカーボン類、ハイドロフルオロカーボン類、ペルフルオロエーテル類またはペルフルオロカーボン類より選択された溶媒に溶解させて得られる溶液を用意し、フッ素ガスをその溶液に直接に吹き込んでその溶液へフッ素ガスを導入し、溶液温度を−30℃〜10℃に維持しつつ反応させ、該複素環上の官能基の結合した炭素原子及びヘテロ原子のそれぞれを除く複素環構成炭素原子の内の1つに選択的に1個のフッ素を導入したモノフルオロ複素環式化合物を製造することを特徴とする複素環上に官能基を有する複素環式化合物のフッ素化方法。
【請求項3】 フッ素ガスを、複素環上に官能基を有する複素環式化合物に対するフッ素の導入量が0.5〜8モル当量となる量使用する請求項1または2記載のフッ素化方法。
【請求項4】 複素環上の官能基が水酸基、炭素数1〜3のアルキル基、炭素数2〜3のエステル基、炭素数2〜3のカルボニル基、カルボキシル基、ホルミル基、アミノ基、アミド基、ニトロ基、ニトリル基より選択された1または2以上である請求項1〜3のいずれかに記載のフッ素化方法。
【請求項5】 フッ素化される複素環上に官能基を有する炭素数4〜20の複素環式化合物の複素環部分が、フラン、ピラン、ピロール、チオフェン、チオピラン、ピリジン、チアゾール、イミダゾール、ピラゾール、イソキサゾール、フラザン、ピラジン、ピリミジン、ピリダジン、インドール、キノリン、プリンより選択される請求項1〜4のいずれかに記載のフッ素化方法。
[Claims]
    (1) On the heterocycleA heterocyclic compound having 4 to 20 carbon atoms having a functional group,A solution obtained by dissolving in a solvent selected from hydrochlorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons, perfluoroethers or perfluorocarbons is prepared in a reaction vessel, and fluorine gas is vaporized in the reaction vessel. To indirectly introduce fluorine gas into the liquid phase in the reaction vessel.Reacting while maintaining the liquidus temperature at -30 ° C to 10 ° C, selectively to one of the carbon atoms constituting the heterocyclic ring excluding each of the carbon atom bonded to the functional group on the heterocyclic ring and the heteroatom. Monofluoro with one fluorine introducedHeterocyclicCharacterized by producing a compoundOn the heterocycleA method for fluorinating a heterocyclic compound having a functional group.
    (2) A heterocyclic compound having 4 to 20 carbon atoms having a functional group on a heterocycle is dissolved in a solvent selected from hydrochlorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons, perfluoroethers, and perfluorocarbons. The resulting solution is prepared, fluorine gas is directly blown into the solution to introduce the fluorine gas into the solution, and reacted while maintaining the solution temperature at −30 ° C. to 10 ° C. Producing a monofluoroheterocyclic compound in which one fluorine is selectively introduced into one of the carbon atoms constituting the heterocyclic ring excluding each of the bonded carbon atom and the heteroatom; A method for fluorinating a heterocyclic compound having a functional group.
    3. Fluorine gasThe amount by which the amount of fluorine introduced into the heterocyclic compound having a functional group on the heterocycle becomes 0.5 to 8 molar equivalentsClaim 1 to useOr 2The fluorination method described.
    (4) On a heterocycleFunctional group,Selected from a hydroxyl group, an alkyl group having 1 to 3 carbon atoms, an ester group having 2 to 3 carbon atoms, a carbonyl group having 2 to 3 carbon atoms, a carboxyl group, a formyl group, an amino group, an amide group, a nitro group, and a nitrile group. The fluorination method according to any one of claims 1 to 3, which is one or more.
    5. FluorinatedThe heterocyclic moiety of the heterocyclic compound having a functional group on the heterocycle and having 4 to 20 carbon atoms,The fluorination according to any one of claims 1 to 4, wherein the fluorination is selected from furan, pyran, pyrrole, thiophene, thiopyran, pyridine, thiazole, imidazole, pyrazole, isoxazole, furazane, pyrazine, pyrimidine, pyridazine, indole, quinoline, and purine. Method.

【0006】
【課題を解決するための手段】
本発明は、複素環上に官能基を有する炭素数4〜20の複素環式化合物を、ハイドロクロロカーボン類、ハイドロクロロフルオロカーボン類、ハイドロフルオロカーボン類、ペルフルオロエーテル類またはペルフルオロカーボン類より選択された溶媒に溶解させて得られる溶液を反応容器内に用意し、フッ素ガスを反応容器内の気相に吹き込んでフッ素ガスを間接的に反応容器内の液相に導入、又はフッ素ガスを液相に直接的に吹き込んで導入、液相温度を−30℃〜10℃に維持しつつ反応させ、該複素環上の官能基の結合した炭素原子及びヘテロ原子のそれぞれを除く複素環構成炭素原子の内の1つに選択的に1個のフッ素を導入してモノフルオロ化し、かつ高収率でモノフルオロ複素環式化合物を製造することを特徴とする複素環上に官能基を有する複素環式化合物のフッ素化方法を提供する。本発明方法の反応条件においては、複素環に結合している官能基中の炭素原子はフッ素化されない。
[0006]
[Means for Solving the Problems]
The present invention relates to a solvent in which a heterocyclic compound having a functional group on a heterocycle and having 4 to 20 carbon atoms is selected from hydrochlorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons, perfluoroethers, and perfluorocarbons. A solution obtained by dissolving in a reaction vessel is prepared in a reaction vessel, and fluorine gas is blown into a gas phase in the reaction vessel to indirectly introduce fluorine gas into a liquid phase in the reaction vessel, or directly flow fluorine gas into a liquid phase. The reaction is carried out while maintaining the liquid phase temperature at -30 ° C to 10 ° C, and among the carbon atoms of the heterocyclic ring excluding each of the carbon atom to which the functional group on the heterocyclic ring is bonded and the heteroatom, one to selectively monofluorination by introducing one fluorine, and high yield to produce the mono-fluoro heterocyclic compound onto heterocycle, wherein It provides a fluorination process of heterocyclic compound having a functional group. Under the reaction conditions of the method of the present invention, the carbon atom in the functional group bonded to the heterocycle is not fluorinated.

以下、本発明をさらに詳しく説明する。
本発明において使用する出発原料中の複素環上の官能基としては、例えば、水酸基、炭素数1〜3のアルキル基、炭素数2〜3のエステル基、炭素数2〜3のカルボニル基、カルボキシル基、ホルミル基、アミノ基、アミド基、ニトロ基、ニトリル基などが挙げられる。複素環式化合物の例としては、フラン、ピラン、ピロール、チオフェン、チオピラン、ピリジン、チアゾール、イミダゾール、ピラゾール、イソキサゾール、フラザン、ピラジン、ピリミジン、ピリダジン、インドール、キノリン、プリンなどが挙げられる。特に、ピロール、イミダゾール、ピラゾール、ピリジン、ピラジン、ピリミジンなどの複素環式化合物に官能基が結合した炭素原子数4〜20の複素環式化合物が本発明において好ましい。複素環上の官能基の位置は1位から5位であることが好ましく、また複素環上の官能基の数はアルキル基、エステル基、ホルミル基より選択された1または2以上であることが好ましい。これらの例のような好ましい出発原料を本発明で使用すると、選択的なモノフルオロ化が容易に実施でき、目的とするモノフルオロ化合物を高収率で製造することができる。
Hereinafter, the present invention will be described in more detail.
Examples of the functional group on the heterocycle in the starting material used in the present invention include a hydroxyl group, an alkyl group having 1 to 3 carbon atoms, an ester group having 2 to 3 carbon atoms, a carbonyl group having 2 to 3 carbon atoms, and a carboxyl group. Group, formyl group, amino group, amide group, nitro group, nitrile group and the like. Examples of heterocyclic compounds include furan, pyran, pyrrole, thiophene, thiopyran, pyridine, thiazole, imidazole, pyrazole, isoxazole, furazane, pyrazine, pyrimidine, pyridazine, indole, quinoline, purine, and the like. Particularly, a heterocyclic compound having 4 to 20 carbon atoms in which a functional group is bonded to a heterocyclic compound such as pyrrole, imidazole, pyrazole, pyridine, pyrazine and pyrimidine is preferable in the present invention. The position of the functional group on the heterocyclic ring is preferably 1 to 5 and the number of functional groups on the heterocyclic ring is one or more selected from an alkyl group, an ester group, and a formyl group. preferable. When preferred starting materials such as these examples are used in the present invention, selective monofluorination can be easily carried out, and the desired monofluoro compound can be produced in high yield.

JP2000246948A 2000-08-16 2000-08-16 Method for fluorinating heterocyclic compound Pending JP2002060381A (en)

Priority Applications (1)

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JP2000246948A JP2002060381A (en) 2000-08-16 2000-08-16 Method for fluorinating heterocyclic compound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000246948A JP2002060381A (en) 2000-08-16 2000-08-16 Method for fluorinating heterocyclic compound

Publications (2)

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JP2002060381A JP2002060381A (en) 2002-02-26
JP2002060381A5 true JP2002060381A5 (en) 2007-09-13

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Country Status (1)

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