JPH10265505A - Production of methylated gamma-cyclodextrin - Google Patents

Production of methylated gamma-cyclodextrin

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Publication number
JPH10265505A
JPH10265505A JP6971197A JP6971197A JPH10265505A JP H10265505 A JPH10265505 A JP H10265505A JP 6971197 A JP6971197 A JP 6971197A JP 6971197 A JP6971197 A JP 6971197A JP H10265505 A JPH10265505 A JP H10265505A
Authority
JP
Japan
Prior art keywords
group
cyclodextrin
reaction
protecting
protecting 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.)
Pending
Application number
JP6971197A
Other languages
Japanese (ja)
Inventor
Masanobu Yoshinaga
雅信 吉永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Printing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP6971197A priority Critical patent/JPH10265505A/en
Publication of JPH10265505A publication Critical patent/JPH10265505A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a methylated derivative of γ- cyclodextrin in a high yield. SOLUTION: This method for producing a methylated γ-cyclodextrin comprises protecting hydroxyl group at 2 position of (6-O-tert- butyldimethylsilyl)-γ-cyclodextrin with a protecting group, de-silylating, then methylating the hydroxyl groups at 3 and 6 positions and then removing the protecting group, or protecting the hydroxyl group at the 2 position of (6-O-tert- butyldimethylsily)-γ-cyclodextrin with a protecting group, methylating the hydroxyl group at the 3 position, de-silylating, and then removing the protecting group, or protecting the hydroxyl group at the 2 and 6 positions of cyclodextrin with a protecting group selected from allyl, benzyl and p-methoxybenzyl group, methylating the hydroxyl group at the 3 position, then removing the protecting group a the 2 and 6 positions. Also, as a catalyst for protecting the hydroxyl groups with the protecting group, a mixed base consisting of barium oxide and barium hydroxide octahydrate is used.

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γ−シクロデキスト
リンのメチル化誘導体の製造方法に関する。
[0001] The present invention relates to a method for producing a methylated derivative of γ-cyclodextrin.

【0002】[0002]

【従来の技術】シクロデキストリン(以下場合によりC
Dと略記する)は分子内に疎水性の空洞を有し、外側は
親水性で水中油型ミセルに似た機能を示す化合物であ
る。このようなCDはその空洞径に応じて疎水性のゲス
ト分子を取り込み水溶液中で複合体を形成し、調整法に
よっては固体の包接化合物を単離することもできる。こ
の立体選択的な相互作用によりゲスト分子の物理化学的
性質を微妙に変化させることができるため、製剤への有
効利用が期待でき、各方面で種々に利用され、また利用
が図られている化合物である。
2. Description of the Related Art Cyclodextrin (hereinafter sometimes referred to as C
D) is a compound that has a hydrophobic cavity in the molecule and is hydrophilic on the outside and has a function similar to an oil-in-water micelle. Such a CD takes in a hydrophobic guest molecule according to the cavity diameter to form a complex in an aqueous solution, and a solid clathrate can be isolated by an adjusting method. This stereoselective interaction allows the physicochemical properties of the guest molecule to be subtly changed, so that it can be expected to be effectively used in pharmaceuticals, and is widely used in various fields. It is.

【0003】特にシクロデキストリンの2,3又は6位
の水酸基を部分的に残してなるか又は他の置換基に置換
せしめたシクロデキストリン誘導体の場合は、その水酸
基又は他の置換基との相互作用により包接能が大幅に変
化するため、ゲスト分子の種類、その物性を大きく変化
させうることが期待できる。従ってこのような水酸基を
他の置換基に置換せしめたシクロデキストリン誘導体に
ついて種々の研究がなされてきた。そして3位及び3,
6位の水酸基をメチル化したγ−シクロデキストリン誘
導体は、種々の化合物に対して親密な可溶性能を示す化
合物であり、また種々分解しやすい薬物等を安定化させ
る特性を持つものである。
In particular, in the case of a cyclodextrin derivative in which a hydroxyl group at the 2-, 3- or 6-position of cyclodextrin is partially left or substituted with another substituent, the interaction with the hydroxyl group or other substituent is given. Therefore, it is expected that the type of the guest molecule and its physical properties can be greatly changed. Accordingly, various studies have been made on cyclodextrin derivatives in which such a hydroxyl group is substituted with another substituent. And 3rd and 3rd
The γ-cyclodextrin derivative in which the hydroxyl group at the 6-position is methylated is a compound showing intimate solubility for various compounds, and has a property of stabilizing various easily decomposable drugs and the like.

【0004】[0004]

【発明が解決しようとする課題】3位の水酸基をメチル
化した3−モノ−O−メチル−αおよびβ−シクロデキ
ストリンの合成方法は、Carbohydr.Res., 187 ,203-221
(1989)に、また別法として、3−モノ−O−メチル−β
−シクロデキストリンの合成方法は、Helv.Chim.Acta,
75,791-812(1992)に報告されている。さらに、3,6−
ジ−O−メチル−αおよびβ−シクロデキストリンの合
成方法は、Carbohydr.Res., 187 ,203-221(1989)及び特
開平3−137103号公報に詳細に記載されている。
ところが、γ−シクロデキストリンのメチル化誘導体は
中間体の合成が困難とされ、目的とされる誘導体は合成
されなかった。
A method for synthesizing 3-mono-O-methyl-α and β-cyclodextrin in which the hydroxyl group at the 3-position is methylated is disclosed in Carbohydr. Res., 187 , 203-221.
(1989) and, alternatively, 3-mono-O-methyl-β
-A method for synthesizing cyclodextrin is described in Helv. Chim. Acta,
75 , 791-812 (1992). Furthermore, 3,6-
Methods for synthesizing di-O-methyl-α and β-cyclodextrin are described in detail in Carbohydr. Res., 187 , 203-221 (1989) and JP-A-3-137103.
However, the synthesis of an intermediate of a methylated derivative of γ-cyclodextrin was considered difficult, and the desired derivative was not synthesized.

【0005】本発明は、上記問題点を解決するためにな
されたものであって、γ−シクロデキストリンのメチル
化誘導体を高収率で得ることができる方法を提供するこ
とを目的とする。
[0005] The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for obtaining a methylated derivative of γ-cyclodextrin in a high yield.

【0006】[0006]

【課題を解決するための手段】本発明の第1の発明は、
(6−O−tertーブチルジメチルシリル)−γ−シ
クロデキストリンの2位の水酸基を保護基にて保護し、
脱シリル化した後、3位と6位の水酸基をメチル化し、
次いで保護基を脱離することを特徴とするメチル化γ−
シクロデキストリンの製造方法である。
Means for Solving the Problems A first invention of the present invention is:
Protecting the 2-position hydroxyl group of (6-O-tert-butyldimethylsilyl) -γ-cyclodextrin with a protecting group;
After desilylation, the hydroxyl groups at the 3- and 6-positions are methylated,
Subsequently, a methylated γ-
This is a method for producing cyclodextrin.

【0007】本発明の第2の発明は、(6−O−ter
tーブチルジメチルシリル)−γ−シクロデキストリン
の2位の水酸基を保護基にて保護し、次いで3位の水酸
基をメチル化し、脱シリル化した後、保護基を脱離する
ことを特徴とするメチル化γ−シクロデキストリンの製
造方法である。
[0007] The second invention of the present invention relates to (6-O-ter
tert-butyldimethylsilyl) -γ-cyclodextrin is protected with a protecting group at the 2-position hydroxyl group, then methylated at the 3-position hydroxyl group, desilylated, and then the protective group is eliminated. This is a method for producing methylated γ-cyclodextrin.

【0008】本発明の第3の発明は、シクロデキストリ
ンの3位と6位の水酸基をアリル基、ベンジル基及びp
ーメトキシベンジル基より選ばれた保護基にて保護し、
次いで3位の水酸基をメチル化した後、2位と6位の保
護基を脱離することを特徴とするメチル化γ−シクロデ
キストリンの製造方法である。
In a third aspect of the present invention, the hydroxyl groups at the 3- and 6-positions of cyclodextrin are allyl, benzyl and p-hydroxyl groups.
Protected with a protecting group selected from -methoxybenzyl group,
Next, a method for producing methylated γ-cyclodextrin, comprising methylating the hydroxyl group at the 3-position and then removing the protecting groups at the 2- and 6-positions.

【0009】本発明の第4の発明は、水酸基を保護基に
て保護するための触媒として、酸化バリウムと水酸化バ
リウム・8水和物の混合塩基を用いることを特徴とする
メチル化γ−シクロデキストリンの製造方法である。
A fourth invention of the present invention is characterized in that a mixed base of barium oxide and barium hydroxide octahydrate is used as a catalyst for protecting a hydroxyl group with a protecting group, wherein the methylated γ- This is a method for producing cyclodextrin.

【0010】[0010]

【発明の実施の形態】以下本発明の実施例を、以下の反
応例に従って説明する。3,6−ジ−O−メチル−γ−
シクロデキストリンの合成。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below according to the following reaction examples. 3,6-di-O-methyl-γ-
Synthesis of cyclodextrin.

【0011】[0011]

【化1】 Embedded image

【0012】反応[1] γ−シクロデキストリンの6位の水酸基をtert−ブ
チルジメチルシリル基で置換する。γ−シクロデキスト
リンの6位の水酸基をtert−ブチルジメチルシリル
基で置換するには、γ−シクロデキストリンをピリジン
に溶解するか、ジメチルホルムアミド(DMF)、ジメ
チルアセトアミド(DMAc)、ジメチルスルホキシド
(DMSO)等の溶媒に溶解しイミダゾール、トリエチ
ルアミン、4−ジメチルアミノピリジンなどの塩基を加
えて、tert−ブチルジメチルシリルクロライドを添
加して反応させることにより、[A]が得られる。
Reaction [1] The hydroxyl group at the 6-position of γ-cyclodextrin is replaced with a tert-butyldimethylsilyl group. In order to replace the hydroxyl group at the 6-position of γ-cyclodextrin with a tert-butyldimethylsilyl group, γ-cyclodextrin is dissolved in pyridine or dimethylformamide (DMF), dimethylacetamide (DMAc), dimethylsulfoxide (DMSO) And [A] can be obtained by adding a base such as imidazole, triethylamine or 4-dimethylaminopyridine, and adding tert-butyldimethylsilyl chloride to react.

【0013】反応[2] 6位の水酸基をtert−ブチルジメチルシリル基で置
換したγ−CD[A]の2位の水酸基に保護基を導入す
る。導入することのできる保護基は、アリル基、ベンジ
ル基、p−メトキシベンジル基である。このような保護
基を導入するには、酸化バリウムと水酸化バリウム・8
水和物の混合塩基を用いると良い。この混合塩基を用い
ることにより、CDの持つ水酸基の酸解離定数の小さい
2位の水素が引き抜かれ、各保護基で置換されることに
より、導入することができる。
Reaction [2] A protecting group is introduced into the 2-position hydroxyl group of γ-CD [A] in which the 6-position hydroxyl group is substituted with a tert-butyldimethylsilyl group. Protecting groups that can be introduced are allyl, benzyl and p-methoxybenzyl. In order to introduce such a protecting group, barium oxide and barium hydroxide-8
It is preferable to use a mixed base of hydrates. By using this mixed base, hydrogen at the 2-position having a small acid dissociation constant of the hydroxyl group of CD can be extracted and replaced with each protecting group to introduce the hydrogen.

【0014】2位にアリル基を導入するには、[A]を
ジメチルホルムアミド(DMF)、ジメチルアセトアミ
ド(DMAc)、ジメチルスルホキシド(DMSO)等
の溶媒に溶解し、この系に窒素雰囲気下で酸化バリウ
ム、水酸化バリウム・8水和物の混合塩基と、臭化アリ
ル、塩化アリル、ヨウ化アリル、pートルエンスルホン
酸アリル、メタンスルホン酸アリル、ベンゼンスルホン
酸アリル等のアリル化剤を添加して反応させることによ
り、[B]が得られる。
In order to introduce an allyl group at the 2-position, [A] is dissolved in a solvent such as dimethylformamide (DMF), dimethylacetamide (DMAc), dimethylsulfoxide (DMSO) or the like, and the system is oxidized under a nitrogen atmosphere. Add a mixed base of barium and barium hydroxide octahydrate and an allylic agent such as allyl bromide, allyl chloride, allyl iodide, allyl p-toluenesulfonate, allyl methanesulfonate and allyl benzenesulfonate. To give the compound [B].

【0015】2位にベンジル基を導入するには、[A]
をDMF、DMAc、DMSO等の溶媒に溶解し、この
系に窒素雰囲気下で酸化バリウム、水酸化バリウム・8
水和物の混合塩基と、臭化ベンジル、塩化ベンジル、ヨ
ウ化ベンジル、pートルエンスルホン酸ベンジル、メタ
ンスルホン酸ベンジル、ベンゼンスルホン酸ベンジル等
のベンジル化剤を添加して反応させることにより、
[B]が得られる。
In order to introduce a benzyl group at the 2-position, [A]
Is dissolved in a solvent such as DMF, DMAc, DMSO or the like, and barium oxide, barium hydroxide · 8 is added to this system under a nitrogen atmosphere.
By reacting with a mixed base of hydrate, adding a benzylating agent such as benzyl bromide, benzyl chloride, benzyl iodide, benzyl p-toluenesulfonate, benzyl methanesulfonate, benzyl benzenesulfonate, etc.
[B] is obtained.

【0016】2位のpーメトキシベンジル基を導入する
には、[A]をDMF、DMAc、DMSO等の溶媒に
溶解し、この系に窒素雰囲気下で酸化バリウム、水酸化
バリウム・8水和物の混合塩基と、臭化pーメトキシベ
ンジル、塩化pーメトキシベンジル、ヨウ化pーメトキ
シベンジル、pートルエンスルホン酸pーメトキシベン
ジル、メタンスルホン酸pーメトキシベンジル、ベンゼ
ンスルホン酸pーメトキシベンジル等のpーメトキシベ
ンジル化剤を添加して反応させることにより、[B]が
得られる。
To introduce the p-methoxybenzyl group at the 2-position, [A] is dissolved in a solvent such as DMF, DMAc, DMSO, etc., and barium oxide, barium hydroxide octahydrate is added to this system under a nitrogen atmosphere. P-methoxybenzyl bromide, p-methoxybenzyl chloride, p-methoxybenzyl iodide, p-methoxybenzyl p-toluenesulfonate, p-methoxybenzyl methanesulfonate, p-methoxybenzenesulfonate [B] is obtained by adding and reacting a p-methoxybenzylating agent such as benzyl.

【0017】反応[3] [B]を脱シリル化する。[B]を脱シリル化するに
は、[B]を塩化メチレン、クロロホルム、四塩化炭
素、ジエチルエーテル、THF、Dioxane等の溶
媒に溶解し、三フッ化ホウ素のジエチルエーテル錯体を
添加して反応させるか、または、THFに溶解し、フッ
化テトラn−ブチルアンモニウムを添加して反応させる
か、あるいは、酢酸中で加熱することにより、[C]が
得られる。
Reaction [3] [B] is desilylated. To desilylate [B], [B] is dissolved in a solvent such as methylene chloride, chloroform, carbon tetrachloride, diethyl ether, THF, or Dioxane, and a boron ether trifluoride-diethyl ether complex is added thereto. Or by dissolving in THF and adding tetra-n-butylammonium fluoride to react, or heating in acetic acid to obtain [C].

【0018】反応[4] 2位の水酸基を保護基にて保護したγ−CD[C]の3
位と6位の水酸基をメチル化する。3位と6位の水酸基
をメチル化するには、[C]をDMF、DMAc、DM
SO、HMPA、THF、Dioxane等の溶媒に溶
解し、塩基としてNaH、LiH、KH、NaOH、K
OH等を用いて窒素雰囲気下冷却し遮光状態で、ヨウ化
メチル、臭化メチル、塩化メチル等のメチル化剤と反応
させる。あるいは、ピリジン、エチレンジアミン、ジエ
チレントリアミン、エタノールアミン等に溶解するか、
Dioxane、THF等の溶媒に溶解し、4ージメチ
ルアミノピリジン、イミダゾール等を添加した後、メチ
ル化剤としてトリフルオロメタンスルホン酸メチルを添
加して反応させることにより、[D]が得られる。
Reaction [4] 3 of γ-CD [C] in which the hydroxyl group at the 2-position is protected by a protecting group
The hydroxyl groups at the 6th and 6th positions are methylated. To methylate the hydroxyl groups at the 3- and 6-positions, [C] is converted to DMF, DMAc, DMc
Dissolve in a solvent such as SO, HMPA, THF, Dioxane, etc., and use NaH, LiH, KH, NaOH, K
The solution is cooled under a nitrogen atmosphere using OH or the like and reacted with a methylating agent such as methyl iodide, methyl bromide or methyl chloride in a light-shielded state. Alternatively, it is dissolved in pyridine, ethylenediamine, diethylenetriamine, ethanolamine, or the like,
[D] is obtained by dissolving in a solvent such as Dioxane or THF, adding 4-dimethylaminopyridine, imidazole or the like, and then reacting by adding methyl trifluoromethanesulfonate as a methylating agent.

【0019】反応[5] 3位と6位の水酸基をメチル化したγ−CD[D]の2
位の保護基を脱離する。 2位の保護基であるアリル基
を脱離するには、[D]を塩化トリス(トリフェニルホ
スフィン)ロジウム(I)と1,4ージアザビシクロ
[2,2,2]オクタンでプロペニル基に異性化させた
後、水銀塩で処理することにより、[E]が得られる。
2位の保護基であるベンジル基を脱離するには、[D]
をエタノール、メタノール、ジオキサン、THF(時に
は酸触媒を添加してもよい)または酢酸等の溶媒に溶解
してPd/Cを用いて水素化分解することにより、
[E]が得られる。2位の保護基であるp−メトキシベ
ンジル基を脱離するには、[D]をエタノール、エタノ
ール、ジオキサン、THF(時には酸触媒を添加しても
よい)または酢酸等の溶媒に溶解してPd/Cを用いて
水素化分解するか、2,3ージクロロー5,6ージイソ
シアノー1,4ーベンゾキノン(DDQ)あるいは硝酸
セリウム(IV)アンモニウム(CAN)を用いて反応
させることにより、[E]が得られる。
Reaction [5] 2 of γ-CD [D] in which the hydroxyl groups at the 3- and 6-positions are methylated
The protecting group at the position is eliminated. In order to eliminate the allyl group which is a protecting group at the 2-position, [D] is isomerized to a propenyl group with tris (triphenylphosphine) rhodium (I) chloride and 1,4-diazabicyclo [2,2,2] octane. After that, by treating with a mercury salt, [E] is obtained.
To remove the benzyl group which is the protecting group at the 2-position, [D]
Is dissolved in a solvent such as ethanol, methanol, dioxane, THF (sometimes an acid catalyst may be added) or acetic acid, and hydrogenolyzed using Pd / C.
[E] is obtained. To remove the p-methoxybenzyl group which is the 2-position protecting group, [D] is dissolved in a solvent such as ethanol, ethanol, dioxane, THF (sometimes an acid catalyst may be added) or acetic acid. [E] is obtained by hydrogenolysis using Pd / C or by reaction using 2,3-dichloro-5,6-diisocyano 1,4-benzoquinone (DDQ) or cerium (IV) ammonium nitrate (CAN). Can be

【0020】3−モノ−O−メチル−γ−シクロデキス
トリンの合成。
Synthesis of 3-mono-O-methyl-γ-cyclodextrin.

【0021】[0021]

【化2】 Embedded image

【0022】反応[6] 6位の水酸基をtert−ブチルジメチルシリル化し、
2位の水酸基を保護基で保護したγ−CD[B]の3位
の水酸基をメチル化する。3位の水酸基をメチル化する
には、[B]をDMF、DMAc、DMSO、HMP
A、THF、Dioxane等の溶媒に溶解し、塩基と
してNaH、LiH、KH、NaOH、KOH等を用い
て窒素雰囲気下冷却し遮光状態で、ヨウ化メチル、臭化
メチル、塩化メチル等のメチル化剤と反応させる。ある
いは、ピリジン、エチレンジアミン、ジエチレントリア
ミン、トリエチルアミン等に溶解するか、Dioxan
e、THF等の溶媒に溶解し、4ージメチルアミノピリ
ジン、イミダゾール、2,6ージーtertーブチルー
4ーメチルピリジン等を添加した後、メチル化剤として
トリフルオロメタンスルホン酸メチルを添加して反応さ
せることにより、[F]が得られる。
Reaction [6] The hydroxyl group at the 6-position is tert-butyldimethylsilylated,
The hydroxyl group at position 3 of γ-CD [B] in which the hydroxyl group at position 2 is protected with a protecting group is methylated. To methylate the hydroxyl group at the 3-position, [B] is converted to DMF, DMAc, DMSO, HMP
A, dissolved in a solvent such as THF, Dioxane, etc., and cooled under a nitrogen atmosphere using NaH, LiH, KH, NaOH, KOH, etc. as a base, and methylated such as methyl iodide, methyl bromide, methyl chloride, etc. under light shielding conditions. React with the agent. Alternatively, it can be dissolved in pyridine, ethylenediamine, diethylenetriamine, triethylamine, or the like, or can be dissolved in Dioxan
e, dissolved in a solvent such as THF, and added with 4-dimethylaminopyridine, imidazole, 2,6-ditert-butyl-4-methylpyridine, and the like, and then reacted by adding methyl trifluoromethanesulfonate as a methylating agent. [F] is obtained.

【0023】反応[7] [F]を脱シリル化する。[F]を脱シリル化するに
は、[F]を塩化メチレン、クロロホルム、四塩化炭
素、ジエチルエーテル、THF、Dioxane等の溶
媒に溶解し、三フッ化ホウ素のジエチルエーテル錯体を
添加して反応させるか、または、THFに溶解し、フッ
化テトラn−ブチルアンモニウムを添加して反応させる
か、あるいは、酢酸中で加熱することにより、[G]が
得られる。
Reaction [7] [F] is desilylated. In order to desilylate [F], [F] is dissolved in a solvent such as methylene chloride, chloroform, carbon tetrachloride, diethyl ether, THF, or Dioxane, and a diethyl ether complex of boron trifluoride is added. Or [G] is obtained by dissolving in THF and reacting by adding tetra-n-butylammonium fluoride, or by heating in acetic acid.

【0024】反応[8] [G]の2位の保護基を脱離する。2位の保護基である
アリル基を脱離するには、[G]を塩化トリス(トリフ
ェニルホスフィン)ロジウム(I)と1,4ージアザビ
シクロ[2,2,2]オクタンでプロペニル基に異性化
させた後、水銀塩で処理することにより、[H]が得ら
れる。2位の保護基であるベンジル基を脱離するには、
[G]をエタノール、メタノール、ジオキサン、THF
(時には酸触媒を添加してもよい)または酢酸等の溶媒
に溶解してPd/Cを用いて水素化分解することによ
り、[H]が得られる。2位の保護基であるp−メトキ
シベンジル基を脱離するには、[G]をエタノール、メ
タノール、ジオキサン、THF(時には酸触媒を添加し
てもよい)または酢酸等の溶媒に溶解してPd/Cを用
いて水素化分解するか、2,3ージクロロー5,6ージ
イソシアノー1,4ーベンゾキノン(DDQ)あるいは
硝酸セリウム(IV)アンモニウム(CAN)を用いて
反応させることにより、[H]が得られる。
Reaction [8] The protecting group at the 2-position of [G] is eliminated. To remove the allyl group which is a protecting group at the 2-position, [G] is isomerized to a propenyl group with tris (triphenylphosphine) rhodium (I) chloride and 1,4-diazabicyclo [2,2,2] octane. After that, by treating with a mercury salt, [H] is obtained. In order to remove the benzyl group which is a protecting group at the 2-position,
[G] is ethanol, methanol, dioxane, THF
[H] can be obtained by dissolving in a solvent such as acetic acid or the like (sometimes an acid catalyst may be added) and hydrocracking using Pd / C. To remove the p-methoxybenzyl group, which is the 2-position protecting group, [G] is dissolved in a solvent such as ethanol, methanol, dioxane, THF (sometimes an acid catalyst may be added) or acetic acid. [H] can be obtained by hydrogenolysis using Pd / C or by reaction using 2,3-dichloro-5,6-diisocyano 1,4-benzoquinone (DDQ) or cerium (IV) ammonium nitrate (CAN). Can be

【0025】3−モノ−O−メチル−γ−シクロデキス
トリンの合成。
Synthesis of 3-mono-O-methyl-γ-cyclodextrin.

【0026】[0026]

【化3】 Embedded image

【0027】反応[9] γ−CDの2位と6位の水酸基に保護基を導入する。導
入することのできる保護基は、アリル基、ベンジル基、
p−メトキシベンジル基である。このような保護基を導
入するには、酸化バリウムと水酸化バリウム・8水和物
の混合塩基を用いると良い。この混合塩基を用いること
により、CDの持つ水酸基の酸解離定数の小さい2位と
6位の水素が引き抜かれ、各保護基で置換されることに
より導入することができる。
Reaction [9] A protecting group is introduced into the 2- and 6-position hydroxyl groups of γ-CD. Protecting groups that can be introduced are allyl, benzyl,
p-methoxybenzyl group. In order to introduce such a protecting group, it is preferable to use a mixed base of barium oxide and barium hydroxide octahydrate. By using this mixed base, hydrogen at the 2- and 6-positions having a small acid dissociation constant of the hydroxyl group of CD can be extracted and replaced by each protecting group to introduce the hydrogen.

【0028】2位にアリル基を導入するには、γ−CD
をジメチルホルムアミド(DMF)、ジメチルアセトア
ミド(DMAc)、ジメチルスルホキシド(DMSO)
等の溶媒に溶解し、この系に窒素雰囲気下で酸化バリウ
ム、水酸化バリウム・8水和物の混合塩基と、臭化アリ
ル、塩化アリル、ヨウ化アリル、pートルエンスルホン
酸アリル、メタンスルホン酸アリル、ベンゼンスルホン
酸アリル等のアリル化剤を添加して反応させることによ
り、[I]が得られる。
To introduce an allyl group at the 2-position, γ-CD
To dimethylformamide (DMF), dimethylacetamide (DMAc), dimethylsulfoxide (DMSO)
And a mixed base of barium oxide, barium hydroxide octahydrate, allyl bromide, allyl chloride, allyl iodide, allyl p-toluenesulfonate, methanesulfone [I] is obtained by adding and reacting an allylating agent such as allyl acid or allyl benzenesulfonate.

【0029】2位と6位にベンジル基を導入するには、
γ−CDをDMF、DMAc、DMSO等の溶媒に溶解
し、この系に窒素雰囲気下で酸化バリウム、水酸化バリ
ウム・8水和物の混合塩基と、臭化ベンジル、塩化ベン
ジル、ヨウ化ベンジル、pートルエンスルホン酸ベンジ
ル、メタンスルホン酸ベンジル、ベンゼンスルホン酸ベ
ンジル等のベンジル化剤を添加して反応させることによ
り、[I]が得られる。
In order to introduce a benzyl group at the 2- and 6-positions,
γ-CD is dissolved in a solvent such as DMF, DMAc, DMSO, etc., and a mixed base of barium oxide, barium hydroxide octahydrate, benzyl bromide, benzyl chloride, benzyl iodide, Addition of a benzylating agent such as benzyl p-toluenesulfonate, benzyl methanesulfonate, or benzyl benzenesulfonate allows the reaction to yield [I].

【0030】2位と6位のpーメトキシベンジル基を導
入するには、γ−CDをDMF、DMAc、DMSO等
の溶媒に溶解し、この系に窒素雰囲気下で酸化バリウ
ム、水酸化バリウム・8水和物の混合塩基と、臭化pー
メトキシベンジル、塩化pーメトキシベンジル、ヨウ化
pーメトキシベンジル、pートルエンスルホン酸pーメ
トキシベンジル、メタンスルホン酸pーメトキシベンジ
ル、ベンゼンスルホン酸pーメトキシベンジル等のpー
メトキシベンジル化剤を添加して反応させることによ
り、[I]が得られる。
In order to introduce the p-methoxybenzyl group at the 2-position and the 6-position, γ-CD is dissolved in a solvent such as DMF, DMAc or DMSO, and barium oxide, barium hydroxide. Mixed base of octahydrate, p-methoxybenzyl bromide, p-methoxybenzyl chloride, p-methoxybenzyl iodide, p-methoxybenzyl p-toluenesulfonate, p-methoxybenzyl methanesulfonate, benzenesulfonic acid By adding and reacting a p-methoxybenzylating agent such as p-methoxybenzyl, [I] is obtained.

【0031】反応[10] 2位と6位の水酸基を保護基にて保護したγ−CD
[I]の3位の水酸基をメチル化する。3位の水酸基を
メチル化するには、[I]をDMF、DMAc、DMS
O、HMPA、THF、Dioxane等の溶媒に溶解
し、塩基としてNaH、LiH、KH、NaOH、KO
H等を用いて窒素雰囲気下冷却し遮光状態で、ヨウ化メ
チル、臭化メチル、塩化メチル等のメチル化剤と反応さ
せる。あるいは、ピリジン、トリエチルアミン、エチレ
ンジアミン、ジエチレントリアミン等に溶解するか、D
ioxane、THF等の溶媒に溶解し、4ージメチル
アミノピリジン、イミダゾール、2,6−ジーtert
ーブチルー4ーメチルピリジン等を添加した後、メチル
化剤としてトリフルオロメタンスルホン酸メチルを添加
して反応させることにより、[J]が得られる。
Reaction [10] γ-CD wherein the 2- and 6-position hydroxyl groups are protected by a protecting group
The hydroxyl group at the 3-position of [I] is methylated. To methylate the hydroxyl group at the 3-position, [I] is converted to DMF, DMAc, DMS
It is dissolved in a solvent such as O, HMPA, THF, Dioxane or the like, and NaH, LiH, KH, NaOH, KO is used as a base.
The solution is reacted with a methylating agent such as methyl iodide, methyl bromide or methyl chloride in a light-shielded state by cooling under a nitrogen atmosphere using H or the like. Alternatively, dissolving in pyridine, triethylamine, ethylenediamine, diethylenetriamine, or the like;
dissolved in a solvent such as ioxane, THF, etc., and dissolved in 4-dimethylaminopyridine, imidazole, 2,6-di-tert.
After adding -butyl-4-methylpyridine and the like, methyl trifluoromethanesulfonate is added as a methylating agent and reacted to obtain [J].

【0032】反応[11] 3位の水酸基をメチル化したγ−CD[J]の2位と6
位の保護基を脱離する。2位と6位の保護基であるアリ
ル基を脱離するには、[J]を塩化トリス(トリフェニ
ルホスフィン)ロジウム(I)と1,4ージアザビシク
ロ[2,2,2]オクタンでプロペニル基に異性化させ
た後、水銀塩で処理することにより、[H]が得られ
る。2位の保護基であるベンジル基を脱離するには、
[J]をエタノール、メタノール、ジオキサン、THF
(時には酸触媒を添加してもよい)または酢酸等の溶媒
に溶解してPd/Cを用いて水素化分解することによ
り、[H]が得られる。2位の保護基であるp−メトキ
シベンジル基を脱離するには、[J]をエタノール、メ
タノール、ジオキサン、THF(時には酸触媒を添加し
てもよい)または酢酸等の溶媒に溶解してPd/Cを用
いて水素化分解するか、2,3ージクロロー5,6ージ
イソシアノー1,4ーベンゾキノン(DDQ)あるいは
硝酸セリウム(IV)アンモニウム(CAN)を用いて
反応させることにより、[H]が得られる。
Reaction [11] The 2- and 6-positions of γ-CD [J] in which the hydroxyl group at the 3-position is methylated
The protecting group at the position is eliminated. To remove the allyl group which is a protecting group at the 2-position and the 6-position, [J] is converted to a propenyl group with tris (triphenylphosphine) rhodium (I) chloride and 1,4-diazabicyclo [2,2,2] octane. And then treated with a mercury salt to obtain [H]. In order to remove the benzyl group which is a protecting group at the 2-position,
[J] is ethanol, methanol, dioxane, THF
[H] can be obtained by dissolving in a solvent such as acetic acid or the like (sometimes an acid catalyst may be added) and hydrocracking using Pd / C. To remove the p-methoxybenzyl group which is the 2-position protecting group, [J] is dissolved in a solvent such as ethanol, methanol, dioxane, THF (sometimes an acid catalyst may be added) or acetic acid. [H] can be obtained by hydrogenolysis using Pd / C or by reaction using 2,3-dichloro-5,6-diisocyano 1,4-benzoquinone (DDQ) or cerium (IV) ammonium nitrate (CAN). Can be

【0033】[0033]

【実施例】以下に本発明を更に具体的に説明する。The present invention will be described more specifically below.

【0034】<実施例1>3,6−ジーOーメチル−γ
−CDの合成を目的として行った、本発明のCD誘導体
の製造方法の具体的反応例を示す。
Example 1 3,6-Di-O-methyl-γ
-A specific reaction example of the method for producing a CD derivative of the present invention performed for the purpose of synthesizing CD is shown.

【0035】[0035]

【化4】 Embedded image

【0036】上記反応例は具体的には以下のような反応
により行われる。 反応[1] 乾燥したγ−CD(25.9g)を脱水ピリジン(40
0ml)に溶解し、窒素雰囲気下0〜5℃に冷却する。
次いで脱水ピリジン(150ml)に溶解したtert
ーブチルジメチルシリルクロライド(26.6g)を滴
下し、滴下終了後0〜5℃で1時間、室温で12時間攪
拌、反応させる。反応終了後5lの純水より再沈殿を行
い、沈殿物は濾別、純水、冷メタノールで繰り返し洗浄
し、乾燥させる。次いでシリカゲルカラムクロマトグラ
フィーにより精製し、さらにエタノールより3回再結晶
を行い、[A]を得る。(収率:約70%)。
The above reaction examples are specifically carried out by the following reactions. Reaction [1] Dried γ-CD (25.9 g) was added to dehydrated pyridine (40
0 ml) and cooled to 0-5 ° C under a nitrogen atmosphere.
Then tert dissolved in dehydrated pyridine (150 ml)
-Butyldimethylsilyl chloride (26.6 g) is added dropwise, and after completion of the addition, the mixture is stirred and reacted at 0 to 5 ° C. for 1 hour and at room temperature for 12 hours. After completion of the reaction, reprecipitation is performed from 5 l of pure water, and the precipitate is separated by filtration, washed repeatedly with pure water and cold methanol, and dried. Next, the product is purified by silica gel column chromatography, and recrystallized three times from ethanol to obtain [A]. (Yield: about 70%).

【0037】反応[2]ー1(Rがベンジル基の場合) [A](8.4g)を脱水DMF(450ml)溶解
後、窒素雰囲気下室温でBaO(6.0g)、Ba(O
H)2 ・8H2 O(6.4g)を続いて加える。添
加後室温下で2時間攪拌し、次いで系内の温度を5〜1
0℃に下げ、臭化ベンジル(17.4g)をゆっくりと
滴下する。滴下終了後、5〜10℃で1時間、室温で7
2時間以上反応させる。反応終了後沈殿物を濾過、塩化
メチレンにて洗浄し、濾液に加える。得られた溶液は、
1MーH2 SO4 水溶液、純水、飽和NaHCO3
水溶液、飽和NaCl水溶液で洗浄後、乾燥する。有機
層は減圧下濃縮し、残渣はメタノールより再沈殿させ、
次いでエタノールより再結晶を行い精製し、[B]を得
る(収率:約65%)。
Reaction [2] -1 (when R is a benzyl group) [A] (8.4 g) was dissolved in dehydrated DMF (450 ml), and BaO (6.0 g) and Ba (O
H) is subsequently added 2 · 8H 2 O (6.4g) . After the addition, the mixture was stirred at room temperature for 2 hours, and then the temperature in the system was reduced to 5 to 1
Lower to 0 ° C. and slowly add benzyl bromide (17.4 g) dropwise. After completion of the dropwise addition, 5 hours at 5 to 10 ° C and 7 hours at room temperature.
Incubate for at least 2 hours. After completion of the reaction, the precipitate is filtered, washed with methylene chloride, and added to the filtrate. The resulting solution is
1M-H 2 SO 4 aqueous solution, pure water, saturated NaHCO 3
After washing with an aqueous solution and a saturated aqueous solution of NaCl, it is dried. The organic layer was concentrated under reduced pressure, and the residue was reprecipitated from methanol.
Next, the product is purified by recrystallization from ethanol to obtain [B] (yield: about 65%).

【0038】反応[2]ー2(Rがアリル基の場合) 臭化ベンジルに代えて臭化アリル(12.3g)を用い
る以外は、反応[2]ー1と同じ反応を行い、[B]を
得る(収率:約70%)。
Reaction [2] -2 (when R is an allyl group) The same reaction as in reaction [2] -1 was carried out except that allyl bromide (12.3 g) was used instead of benzyl bromide. (Yield: about 70%).

【0039】反応[2]ー3(Rがpーメトキシベンジ
ル基の場合) 臭化ベンジルに代えて臭化pーメトキシベンジル(2
0.5g)を用いる以外は、反応[2]ー1と同じ反応
を行い、[B]を得る(収率:約70%)。
Reaction [2] -3 (when R is p-methoxybenzyl group) Instead of benzyl bromide, p-methoxybenzyl bromide (2
Except that 0.5 g) is used, the same reaction as in the reaction [2] -1 is performed to obtain [B] (yield: about 70%).

【0040】反応[3] [B](Rはベンジル基である)(8.4g)を脱水塩
化メチレン(200ml)に溶解し、窒素雰囲気下0〜
5℃に冷却する。その系に三フッ化ホウ素のジエチルエ
ーテル錯体(11.0ml)を滴下し、滴下終了後0〜
5℃で1時間、室温で1時間反応させる。反応終了後、
溶液に塩化メチレンを加え、氷冷水、飽和NaHCO3
水溶液、飽和NaCl水溶液で洗浄後、乾燥する。有
機層は減圧下濃縮し、残渣はシリカゲルカラムクロマト
グラフィーにて精製し、[C]を得る(収率:約80
%)。尚、Rがアリル基(収率:約55%)、pーメト
キシベンジル基(収率:約60%)の場合も同様の反応
で[C]を得る。
Reaction [3] [B] (R is a benzyl group) (8.4 g) was dissolved in dehydrated methylene chloride (200 ml), and dissolved in a nitrogen atmosphere.
Cool to 5 ° C. A diethyl ether complex of boron trifluoride (11.0 ml) was added dropwise to the system.
The reaction is carried out at 5 ° C. for 1 hour and at room temperature for 1 hour. After the reaction,
Methylene chloride was added to the solution, ice-cold water, saturated NaHCO 3
After washing with an aqueous solution and a saturated aqueous solution of NaCl, it is dried. The organic layer is concentrated under reduced pressure, and the residue is purified by silica gel column chromatography to obtain [C] (yield: about 80).
%). When R is an allyl group (yield: about 55%) or a p-methoxybenzyl group (yield: about 60%), [C] is obtained by the same reaction.

【0041】反応[4] [C](Rはベンジル基である)(6.0g)を脱水D
MF(300ml)に溶解し、窒素雰囲気下0〜5℃に
冷却し、NaH(3.7g)を添加する、添加後2時間
攪拌し、次いで遮光下においてヨウ化メチル(22.0
g)をゆっくりと滴下する。滴下終了後0〜5℃で1時
間、室温に戻して12時間反応させる。反応終了後、過
剰のNaHを分解するためメタノールを加え、30分間
攪拌後沈殿物を濾別して取り除き、濾液を減圧下40℃
以下で濃縮する。残渣は塩化メチレン/純水で抽出し、
有機層は乾燥後減圧下で濃縮する。残渣はシリカゲルカ
ラムクロマトグラフィーにて精製し、[D]を得る(収
率:約75%)。尚、Rがアリル基(収率:約60
%)、pーメトキシベンジル基(収率:約65%)の場
合も同様の反応で[D]を得る。
Reaction [4] [C] (R is a benzyl group) (6.0 g) was dehydrated
Dissolve in MF (300 ml), cool to 0-5 ° C under a nitrogen atmosphere, add NaH (3.7 g), stir for 2 hours after addition, and then, under light protection, methyl iodide (22.0 g).
g) is slowly added dropwise. After completion of the dropwise addition, the mixture is allowed to react at 0 to 5 ° C. for 1 hour, and returned to room temperature for 12 hours. After the completion of the reaction, methanol was added to decompose excess NaH, and after stirring for 30 minutes, the precipitate was removed by filtration and the filtrate was reduced to 40 ° C under reduced pressure.
Concentrate below. The residue is extracted with methylene chloride / pure water,
The organic layer is dried and concentrated under reduced pressure. The residue is purified by silica gel column chromatography to obtain [D] (yield: about 75%). Here, R is an allyl group (yield: about 60
%) And p-methoxybenzyl group (yield: about 65%), [D] is obtained by the same reaction.

【0042】反応[5]ー1(Rがベンジル基の場合) [D](5.0g)を酢酸(150ml)に溶解し、1
0%Pd/C(0.6g)を触媒として水素化分解(室
温、3.0kg/cm2 )を行う。水素の減少が認め
られなくなったら、Pd/Cを濾別して取り除き、濾液
は減圧下濃縮し、残渣はジエチルエーテルより再沈殿さ
せ、沈殿物はシリカゲルカラムクロマトグラフィーにて
精製し、[E]3,6−ジーOーメチル−γ−CDを得
る(収率:約85%)。
Reaction [5] -1 (when R is a benzyl group) [D] (5.0 g) was dissolved in acetic acid (150 ml), and
Hydrocracking (room temperature, 3.0 kg / cm 2 ) is performed using 0% Pd / C (0.6 g) as a catalyst. When no decrease in hydrogen was observed, Pd / C was removed by filtration, the filtrate was concentrated under reduced pressure, the residue was reprecipitated from diethyl ether, and the precipitate was purified by silica gel column chromatography, [E] 3, 6-Di-O-methyl-γ-CD is obtained (yield: about 85%).

【0043】反応[5]ー2(Rがアリル基の場合) [D](5.0g)をエタノール/トルエン/水混合溶
媒(500ml)に溶解し、塩化トリス(トリフェニル
ホスフィン)ロジウム(I)(0.5g)、1,4ージ
アザビシクロ[2,2,2]オクタン(1.5g)を添
加、還流下で12時間反応させる。反応終了後減圧下で
濃縮し、残渣は塩化メチレン/純水で抽出、有機層は冷
塩酸水溶液、次いで飽和炭酸水素ナトリウム水溶液で洗
浄乾燥する。残渣をアセトン/純水(150ml)溶液
とし、酸化水銀(0.5g)、塩化水銀(0.5g)を
続いて加え、室温で1時間反応させる。反応終了後沈殿
物を濾別し、濾液を減圧下で濃縮、残渣は塩化メチレン
に溶解、飽和食塩水、ヨウ化カリウム水溶液、再度飽和
食塩水で洗浄し、乾燥する。再度濃縮後、残渣はシリカ
ゲルカラムクロマトグラフィーにて分離、精製し、
[E]3,6−ジーOーメチル−γ−CDを得る(収
率:約80%)。
Reaction [5] -2 (when R is an allyl group) [D] (5.0 g) was dissolved in a mixed solvent of ethanol / toluene / water (500 ml), and tris (triphenylphosphine) rhodium (I) was dissolved. ) (0.5 g) and 1,4-diazabicyclo [2,2,2] octane (1.5 g), and react under reflux for 12 hours. After completion of the reaction, the mixture is concentrated under reduced pressure, the residue is extracted with methylene chloride / pure water, and the organic layer is washed and dried with a cold aqueous hydrochloric acid solution and then with a saturated aqueous sodium hydrogen carbonate solution. The residue is made into an acetone / pure water (150 ml) solution, and mercury oxide (0.5 g) and mercury chloride (0.5 g) are successively added and reacted at room temperature for 1 hour. After completion of the reaction, the precipitate is separated by filtration, and the filtrate is concentrated under reduced pressure. The residue is dissolved in methylene chloride, washed with a saturated saline solution, an aqueous potassium iodide solution, and again with a saturated saline solution, and dried. After concentration again, the residue was separated and purified by silica gel column chromatography,
[E] 3,6-Di-O-methyl-γ-CD is obtained (yield: about 80%).

【0044】反応[5]ー3(Rがpーメトキシベンジ
ル基の場合) 反応[5]ー1と同様の反応で、[E]3,6−ジーO
ーメチル−γ−CDを得る(収率:約70%)。
Reaction [5] -3 (when R is p-methoxybenzyl group) [E] 3,6-diO is the same as reaction [5] -1.
-Methyl-γ-CD is obtained (yield: about 70%).

【0045】<実施例2>3−モノーOーメチル−γ−
CDの合成を目的として行った、本発明のCD誘導体の
製造方法の具体的反応例を示す。
Example 2 3-Mono-O-methyl-γ-
A specific reaction example of the method for producing a CD derivative of the present invention, which was performed for the purpose of synthesizing CD, is shown.

【0046】[0046]

【化5】 Embedded image

【0047】上記反応例は具体的には以下のような反応
により行われる。 反応[6] [B](Rはベンジル基である)(7.3g)を脱水D
MF(400ml)に溶解し、窒素雰囲気下0〜5℃に
冷却し、NaH(1.5g)を添加する。添加後2時間
攪拌し、次いで遮光下においてヨウ化メチル(9.4
g)をゆっくりと滴下する。滴下終了後0〜5℃で1時
間、室温に戻して12時間反応させる。反応終了後過剰
のNaHを分解するためメタノールを加え30分攪拌
後、沈殿物を濾別して取り除き、濾液を減圧下40℃以
下で濃縮する。残渣は塩化メチレン/純水にて抽出し、
有機層は乾燥後減圧下濃縮する。残渣はシリカゲルカラ
ムクロマトグラフィーにて精製し、[F]を得る(収
率:約60%) 尚、Rがアリル基(収率:約65%)、pーメトキシベ
ンジル基(収率:約60%)の場合も同様の反応で
[D]を得る。
The above reaction examples are specifically carried out by the following reactions. Reaction [6] [B] (R is a benzyl group) (7.3 g)
Dissolve in MF (400 ml), cool to 0-5 ° C. under a nitrogen atmosphere and add NaH (1.5 g). After addition, the mixture was stirred for 2 hours, and then protected from light with methyl iodide (9.4).
g) is slowly added dropwise. After completion of the dropwise addition, the mixture is allowed to react at 0 to 5 ° C. for 1 hour, and returned to room temperature for 12 hours. After the completion of the reaction, methanol was added to decompose excess NaH, and the mixture was stirred for 30 minutes. The precipitate was removed by filtration, and the filtrate was concentrated under reduced pressure at 40 ° C or lower. The residue was extracted with methylene chloride / pure water,
The organic layer is concentrated under reduced pressure after drying. The residue is purified by silica gel column chromatography to obtain [F] (yield: about 60%) where R is an allyl group (yield: about 65%) and p-methoxybenzyl group (yield: about 60%). %), [D] is obtained by the same reaction.

【0048】反応[7] [F](Rはベンジル基である)(4.6g)を脱水塩
化メチレン(150ml)に溶解し、窒素雰囲気下0〜
5℃に冷却する。その系に三フッ化ホウ素ジエチルエー
テル錯体(5.8g)を滴下し、滴下終了後0〜5℃で
1時間、室温で1時間反応させる。反応終了後溶液に塩
化メチレンを加え、氷冷水、飽和NaHCO3 水溶
液、飽和NaCl水溶液で洗浄後、乾燥する。有機層は
減圧下濃縮し、残渣はシリカゲルカラムクロマトグラフ
ィーにて精製し、[G]を得る(収率:約75%)。
尚、Rがアリル基(収率:約70%)、pーメトキシベ
ンジル基(収率:約65%)の場合も同様の反応で
[D]を得る。
Reaction [7] [F] (R is a benzyl group) (4.6 g) was dissolved in dehydrated methylene chloride (150 ml), and dissolved in
Cool to 5 ° C. Boron trifluoride diethyl ether complex (5.8 g) is added dropwise to the system, and after completion of the addition, the mixture is reacted at 0 to 5 ° C. for 1 hour and at room temperature for 1 hour. After completion of the reaction, methylene chloride is added to the solution, which is washed with ice-cooled water, a saturated aqueous solution of NaHCO 3 and a saturated aqueous solution of NaCl, and then dried. The organic layer is concentrated under reduced pressure, and the residue is purified by silica gel column chromatography to obtain [G] (yield: about 75%).
When R is an allyl group (yield: about 70%) or a p-methoxybenzyl group (yield: about 65%), [D] is obtained by the same reaction.

【0049】反応[8]ー1(Rがアリル基の場合) [G](2.1g)を酢酸(100ml)に溶解し、1
0%Pd/C(0.4g)を触媒として水素化分解(室
温、3.0kg/cm2 )を行う。水素の減少が認め
られなくなったら、Pd/Cを濾別して取り除き、濾液
は減圧下濃縮し、残渣はジエチルエーテルより再沈殿さ
せ、沈殿物はシリカゲルカラムクロマトグラフィーにて
精製し、[H]3−モノーOーメチル−γ−CDを得る
(収率:約85%)。
Reaction [8] -1 (when R is an allyl group) [G] (2.1 g) was dissolved in acetic acid (100 ml).
Hydrocracking (room temperature, 3.0 kg / cm 2 ) is performed using 0% Pd / C (0.4 g) as a catalyst. When no decrease in hydrogen was observed, Pd / C was removed by filtration, the filtrate was concentrated under reduced pressure, the residue was reprecipitated from diethyl ether, and the precipitate was purified by silica gel column chromatography to give [H] 3- Mono-O-methyl-γ-CD is obtained (yield: about 85%).

【0050】反応[8]ー2(Rがアリル基の場合) [G](2.1g)をエタノール/トルエン/水(20
0ml)に溶解し、塩化トリス(トリフェニルホスフィ
ン)ロジウム(I)(0.5g)、1,4ージアザビシ
クロ[2,2,2]オクタン(1.5g)を添加、還流
下で12時間反応させる。反応終了後減圧下で濃縮し、
残渣は塩化メチレン/純水で抽出、有機層は冷塩酸水溶
液、次いで飽和炭酸水素ナトリウム水溶液で洗浄乾燥す
る。残渣をアセトン/純水(150ml)溶液とし、酸
化水銀(0.5g)、塩化水銀(0.5g)を続いて加
え、室温で1時間反応させる。反応終了後沈殿物を濾別
し、濾液を減圧下で濃縮、残渣は塩化メチレンに溶解、
飽和食塩水、ヨウ化カリウム水溶液、再度飽和食塩水で
洗浄し、乾燥する。再度濃縮後、残渣はシリカゲルカラ
ムクロマトグラフィーにて分離、精製し、[H]3−モ
ノーOーメチル−γ−CDを得る(収率:約80%)。
Reaction [8] -2 (when R is an allyl group) [G] (2.1 g) was added to ethanol / toluene / water (20
0 ml), tris (triphenylphosphine) rhodium (I) chloride (0.5 g) and 1,4-diazabicyclo [2,2,2] octane (1.5 g) are added and reacted under reflux for 12 hours. . After completion of the reaction, the mixture is concentrated under reduced pressure,
The residue is extracted with methylene chloride / pure water, and the organic layer is washed and dried with a cold aqueous hydrochloric acid solution and then with a saturated aqueous sodium hydrogen carbonate solution. The residue is made into an acetone / pure water (150 ml) solution, and mercury oxide (0.5 g) and mercury chloride (0.5 g) are successively added and reacted at room temperature for 1 hour. After the completion of the reaction, the precipitate was filtered off, the filtrate was concentrated under reduced pressure, and the residue was dissolved in methylene chloride.
The extract is washed with a saturated saline solution, an aqueous solution of potassium iodide and again with a saturated saline solution and dried. After concentration again, the residue is separated and purified by silica gel column chromatography to obtain [H] 3-mono-O-methyl-γ-CD (yield: about 80%).

【0051】反応[8]ー3(Rがpーメトキシベンジ
ル基の場合) 反応[8]ー1と同じ反応で、[H]3−モノーOーメ
チル−γ−CDを得る(収率:約70%)。
Reaction [8] -3 (when R is p-methoxybenzyl group) [H] 3-Mono-O-methyl-γ-CD is obtained by the same reaction as reaction [8] -1 (yield: about 70%).

【0052】<実施例3>3−モノーOーメチル−γ−
CDの合成を目的として行った、本発明のCD誘導体の
製造方法の具体的反応例を示す。
Example 3 3-Mono-O-methyl-γ-
A specific reaction example of the method for producing a CD derivative of the present invention, which was performed for the purpose of synthesizing CD, is shown.

【0053】[0053]

【化6】 Embedded image

【0054】上記反応例は具体的には以下のような反応
により行われる。 反応[9]ー1(Rがベンジル基の場合) 乾燥したγ−CD(7.8g)を脱水DMF(800m
l)に溶解し、窒素雰囲気下室温でBaO(44.3
g)、Ba(OH)2 ・8H2 O(45.6g)を
続いて加える。添加後2時間攪拌する。次いで系内を5
〜10℃に保ちながら、臭化ベンジル(49.4g)を
ゆっくりと滴下する。滴下終了後、5〜10℃で1時
間、室温にて96時間以上反応させる。反応終了後沈殿
物を濾別して取り除き、酢酸エチルにて洗浄し、濾液に
加える。得られた溶液は、1MーH2SO4 水溶液、純
水、飽和NaHCO3 水溶液、飽和NaCl水溶液で
洗浄後、乾燥する。有機層は減圧下濃縮し、残渣はメタ
ノールより再沈殿させ、次いでシリカゲルカラムクロマ
トグラフィーにて精製し、[I]を得る(収率:約55
%)。
The above reaction examples are specifically carried out by the following reactions. Reaction [9] -1 (when R is a benzyl group) Dried γ-CD (7.8 g) was dried in dehydrated DMF (800 m
l) and dissolved in BaO (44.3) at room temperature under a nitrogen atmosphere.
g), is subsequently added a Ba (OH) 2 · 8H 2 O (45.6g). Stir for 2 hours after addition. Next, 5
While maintaining the temperature at 〜1010 ° C., benzyl bromide (49.4 g) is slowly added dropwise. After completion of the dropwise addition, the reaction is carried out at 5 to 10 ° C. for 1 hour and at room temperature for 96 hours or more. After completion of the reaction, the precipitate was removed by filtration, washed with ethyl acetate, and added to the filtrate. The obtained solution is washed with a 1M aqueous solution of H 2 SO 4 , pure water, a saturated aqueous solution of NaHCO 3 , and a saturated aqueous solution of NaCl, and then dried. The organic layer is concentrated under reduced pressure, the residue is reprecipitated from methanol, and then purified by silica gel column chromatography to obtain [I] (yield: about 55).
%).

【0055】反応[9]ー2(Rがアリル基の場合) 乾燥したγ−CD(7.8g)を脱水DMF(800m
l)に溶解し、窒素雰囲気下でBaO(44.3g)、
Ba(OH)2 ・8H2 O(45.6g)を続いて
加え、室温で1時間反応させる。次いで反応系を20〜
25℃に保ちながら、臭化アリル(32.6g)をゆっ
くりと滴下する。滴下終了後20〜25℃で2時間、室
温に戻し窒素雰囲気のまま120時間以上攪拌する。反
応終了後系を冷却しながらアンモニア水(85.0m
l)を滴下し、滴下後室温で30分攪拌し、次いで酢酸
エチル/純水で抽出を行う。有機層は乾燥後減圧下で濃
縮し、残渣はアセトンに溶解し、大量のメタノール/純
水混合系により再沈殿を行う。得られた沈殿物は集めて
シリカゲルカラムクロマトグラフィーにて分離、精製
し、[I]を得る(収率:約65%)。
Reaction [9] -2 (when R is an allyl group) Dried γ-CD (7.8 g) was mixed with dehydrated DMF (800 m
l), BaO (44.3 g) under a nitrogen atmosphere,
Ba (OH) 2 · 8H 2 O (45.6g) followed by addition, are reacted at room temperature for 1 hour. Then, the reaction system
Allyl bromide (32.6 g) is slowly added dropwise while maintaining the temperature at 25 ° C. After completion of the dropping, the mixture is returned to room temperature at 20 to 25 ° C. for 2 hours, and stirred for 120 hours or more in a nitrogen atmosphere. After completion of the reaction, ammonia water (85.0 m
1) was added dropwise, and after the addition, the mixture was stirred at room temperature for 30 minutes, and then extracted with ethyl acetate / pure water. The organic layer is dried, concentrated under reduced pressure, the residue is dissolved in acetone, and reprecipitated with a large amount of a methanol / pure water mixture. The obtained precipitates are collected, separated and purified by silica gel column chromatography to obtain [I] (yield: about 65%).

【0056】反応[9]ー3(Rがpーメトキシベンジ
ル基の場合) 乾燥したγ−CD(7.8g)を脱水DMF(800m
l)に溶解し、窒素雰囲気下室温でBaO(44.3
g)、Ba(OH)2 ・8H2 O(45.6g)を
続いて加える。添加後2時間攪拌する。次いで系内を5
〜10℃に保ちながら、塩化pーメトキシベンジル(4
5.2g)をゆっくりと滴下する。その後ヨウ化カリウ
ム(72.0g)を滴下し、滴下後、5〜10℃で1時
間、室温にて144時間以上反応させる。反応終了後沈
殿物を濾別して取り除き、酢酸エチルにて洗浄し、濾液
に加える。得られた溶液は、1MーH2 SO4 水溶
液、純水、飽和NaHCO3 水溶液、飽和NaCl水
溶液で洗浄後、乾燥する。有機層は減圧下濃縮し、残渣
はメタノールより再沈殿させ、次いでシリカゲルカラム
クロマトグラフィーにて精製し、[I]を得る(収率:
約60%)。
Reaction [9] -3 (when R is p-methoxybenzyl group) Dried γ-CD (7.8 g) was treated with dehydrated DMF (800 m
l) and dissolved in BaO (44.3) at room temperature under a nitrogen atmosphere.
g), is subsequently added a Ba (OH) 2 · 8H 2 O (45.6g). Stir for 2 hours after addition. Next, 5
While maintaining the temperature at -10 ° C, p-methoxybenzyl chloride (4
5.2 g) are slowly added dropwise. Thereafter, potassium iodide (72.0 g) is added dropwise, and after the addition, the mixture is reacted at 5 to 10 ° C. for 1 hour and at room temperature for 144 hours or more. After completion of the reaction, the precipitate was removed by filtration, washed with ethyl acetate, and added to the filtrate. The obtained solution is washed with a 1M aqueous solution of H 2 SO 4 , pure water, a saturated aqueous solution of NaHCO 3 , and a saturated aqueous solution of NaCl, and then dried. The organic layer is concentrated under reduced pressure, the residue is reprecipitated from methanol, and then purified by silica gel column chromatography to obtain [I] (yield:
About 60%).

【0057】反応[ 10] [I](Rはベンジル基である)(5.5g)を脱水D
MF(400ml)に溶解し、窒素雰囲気下0〜5℃に
冷却し、NaH(1.2g)を添加する。添加後2時間
攪拌し、次いで遮光下においてヨウ化メチル(6.8
g)をゆっくり滴下する。滴下終了後0〜5℃で1時
間、室温に戻して12時間反応させる。反応終了後過剰
のNaHを分解するため、メタノールを加え30分攪拌
後沈殿物を濾別して取り除き、濾液を減圧下40℃以下
で濃縮する。残渣は酢酸エチル/純水にて抽出し、有機
層は乾燥後減圧下濃縮する。残渣はシリカゲルカラムク
ロマトグラフィーにて精製し、[J]を得る(収率:約
70%)。尚、Rがアリル基(収率:約70%)、pー
メトキシベンジル基(収率:約55%)の場合も同様の
反応で[D]を得る。
Reaction [10] [I] (R is a benzyl group) (5.5 g) was dehydrated D
Dissolve in MF (400 ml), cool to 0-5 ° C. under a nitrogen atmosphere and add NaH (1.2 g). The mixture was stirred for 2 hours after the addition, and then protected from light with methyl iodide (6.8).
g) is slowly added dropwise. After completion of the dropwise addition, the mixture is allowed to react at 0 to 5 ° C. for 1 hour, and returned to room temperature for 12 hours. After the completion of the reaction, in order to decompose excess NaH, methanol is added, and after stirring for 30 minutes, the precipitate is removed by filtration and the filtrate is concentrated under reduced pressure at 40 ° C or lower. The residue is extracted with ethyl acetate / pure water, and the organic layer is dried and concentrated under reduced pressure. The residue is purified by silica gel column chromatography to obtain [J] (yield: about 70%). When R is an allyl group (yield: about 70%) or a p-methoxybenzyl group (yield: about 55%), [D] is obtained by the same reaction.

【0058】反応[11]ー1(Rがベンジル基の場
合) [J](2.8g)を酢酸(100ml)に溶解し、1
0%Pd/C(0.4g)を触媒として水素化分解(室
温、3.0kg/cm2 )を行う。水素の減少が認め
られなくなったら、Pd/Cを濾別して取り除き、濾液
は減圧下濃縮し、残渣はジエチルエーテルより再沈殿さ
せ、沈殿物はシリカゲルカラムクロマトグラフィーにて
精製し、[H]3−モノーOーメチル−γ−CDを得る
(収率:約80%)。
Reaction [11] -1 (when R is a benzyl group) [J] (2.8 g) was dissolved in acetic acid (100 ml).
Hydrocracking (room temperature, 3.0 kg / cm 2 ) is performed using 0% Pd / C (0.4 g) as a catalyst. When no decrease in hydrogen was observed, Pd / C was removed by filtration, the filtrate was concentrated under reduced pressure, the residue was reprecipitated from diethyl ether, and the precipitate was purified by silica gel column chromatography to give [H] 3- Mono-O-methyl-γ-CD is obtained (yield: about 80%).

【0059】反応[11]ー2(Rがアリル基の場合) [J](2.8g)をエタノール/トルエン/水(20
0ml)に溶解し、塩化トリス(トリフェニルホスフィ
ン)ロジウム(I)(0.5g)、1,4ージアザビシ
クロ[2,2,2]オクタン(1.5g)を添加、還流
下で12時間反応させる。反応終了後減圧下で濃縮し、
残渣は塩化メチレン/純水で抽出、有機層は冷塩酸水溶
液、次いで飽和炭酸水素ナトリウム水溶液で洗浄乾燥す
る。残渣をアセトン/純水(150ml)溶液とし、酸
化水銀(0.5g)、塩化水銀(0.5g)を続いて加
え、室温で1時間反応させる。反応終了後沈殿物を濾別
し、濾液を減圧下で濃縮、残渣は塩化メチレンに溶解、
飽和食塩水、ヨウ化カリウム水溶液、再度飽和食塩水で
洗浄し、乾燥する。再度濃縮後、残渣はシリカゲルカラ
ムクロマトグラフィーにて分離、精製し、[H]3−モ
ノーOーメチル−γ−CDを得る(収率:約75%)。
Reaction [11] -2 (when R is an allyl group) [J] (2.8 g) was added to ethanol / toluene / water (20
0 ml), tris (triphenylphosphine) rhodium (I) chloride (0.5 g) and 1,4-diazabicyclo [2,2,2] octane (1.5 g) are added and reacted under reflux for 12 hours. . After completion of the reaction, the mixture is concentrated under reduced pressure,
The residue is extracted with methylene chloride / pure water, and the organic layer is washed and dried with a cold aqueous hydrochloric acid solution and then with a saturated aqueous sodium hydrogen carbonate solution. The residue is made into an acetone / pure water (150 ml) solution, and mercury oxide (0.5 g) and mercury chloride (0.5 g) are successively added and reacted at room temperature for 1 hour. After the completion of the reaction, the precipitate was filtered off, the filtrate was concentrated under reduced pressure, and the residue was dissolved in methylene chloride.
The extract is washed with a saturated saline solution, an aqueous solution of potassium iodide and again with a saturated saline solution and dried. After concentration again, the residue is separated and purified by silica gel column chromatography to obtain [H] 3-mono-O-methyl-γ-CD (yield: about 75%).

【0060】反応[11]ー3(Rがpーメトキシベン
ジル基の場合) 反応[11]ー1と同じ反応で、[H]3−モノーOー
メチル−γ−CDを得る(収率:約60%)。
Reaction [11] -3 (when R is a p-methoxybenzyl group) [H] 3-Mono-O-methyl-γ-CD is obtained by the same reaction as reaction [11] -1 (yield: about 60%).

【0061】[0061]

【発明の効果】以上述べたように、本発明によれば、
(6−O−tertーブチルジメチルシリル)−γ−シ
クロデキストリンの2位の水酸基を保護基にて保護し、
脱シリル化した後、3位と6位の水酸基をメチル化し、
次いで保護基を脱離することにより、3,6ージーOー
メチルーγ−CDを高収率で得ることができた。また、
(6−O−tertーブチルジメチルシリル)−γ−シ
クロデキストリンの2位の水酸基を保護基にて保護し、
次いで3位の水酸基をメチル化し、脱シリル化した後、
保護基を脱離することにより、3ーモノ−Oーメチルー
γ−CDを高収率で得ることができた。また、シクロデ
キストリンの3位と6位の水酸基をアリル基、ベンジル
基及びpーメトキシベンジル基より選ばれた保護基にて
保護し、次いで3位の水酸基をメチル化した後、2位と
6位の保護基を脱離することにより、3ーモノ−Oーメ
チルーγ−CDを高収率で得ることができた。水酸基を
保護基にて保護するための触媒として、酸化バリウムと
水酸化バリウム・8水和物の混合塩基を用いることによ
り、確実に目的とする位置の水酸基を保護基にて保護す
ることができ、高収率で、しかも高度にメチル化された
置換体を含まないメチル化シクロデキストリンを得るこ
とができる方法を得ることができた。
As described above, according to the present invention,
Protecting the 2-position hydroxyl group of (6-O-tert-butyldimethylsilyl) -γ-cyclodextrin with a protecting group;
After desilylation, the hydroxyl groups at the 3- and 6-positions are methylated,
Then, by removing the protecting group, 3,6-di-O-methyl-γ-CD could be obtained in high yield. Also,
Protecting the 2-position hydroxyl group of (6-O-tert-butyldimethylsilyl) -γ-cyclodextrin with a protecting group;
Next, the hydroxyl group at position 3 is methylated and desilylated,
By removing the protecting group, 3-mono-O-methyl-γ-CD could be obtained in high yield. Further, the hydroxyl groups at the 3- and 6-positions of the cyclodextrin are protected with a protecting group selected from an allyl group, a benzyl group and a p-methoxybenzyl group, and then the hydroxyl group at the 3-position is methylated. By removing the protecting group at the 3-position, 3-mono-O-methyl-γ-CD could be obtained in high yield. By using a mixed base of barium oxide and barium hydroxide octahydrate as a catalyst for protecting a hydroxyl group with a protecting group, a hydroxyl group at a target position can be surely protected with a protecting group. Thus, it was possible to obtain a method capable of obtaining a methylated cyclodextrin in a high yield and containing no highly methylated substituent.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】(6−O−tertーブチルジメチルシリ
ル)−γ−シクロデキストリンの2位の水酸基を保護基
にて保護し、脱シリル化した後、3位と6位の水酸基を
メチル化し、次いで保護基を脱離することを特徴とする
メチル化γ−シクロデキストリンの製造方法。
(1) protecting the hydroxyl group at the 2-position of (6-O-tert-butyldimethylsilyl) -γ-cyclodextrin with a protecting group and subjecting it to desilylation, and then methylating the hydroxyl groups at the 3- and 6-positions; And a method for producing a methylated γ-cyclodextrin, which comprises removing a protecting group.
【請求項2】(6−O−tertーブチルジメチルシリ
ル)−γ−シクロデキストリンの2位の水酸基を保護基
にて保護し、次いで3位の水酸基をメチル化し、脱シリ
ル化した後、保護基を脱離することを特徴とするメチル
化γ−シクロデキストリンの製造方法。
2. A protecting group for the hydroxyl group at the 2-position of (6-O-tert-butyldimethylsilyl) -γ-cyclodextrin, followed by methylation of the hydroxyl group at the 3-position and desilylation, followed by protection. A method for producing methylated γ-cyclodextrin, which comprises removing a group.
【請求項3】シクロデキストリンの3位と6位の水酸基
をアリル基、ベンジル基及びpーメトキシベンジル基よ
り選ばれた保護基にて保護し、次いで3位の水酸基をメ
チル化した後、2位と6位の保護基を脱離することを特
徴とするメチル化γ−シクロデキストリンの製造方法。
3. Protecting the hydroxyl groups at the 3- and 6-positions of the cyclodextrin with a protecting group selected from allyl, benzyl and p-methoxybenzyl, and then methylating the hydroxyl at the 3-position. A method for producing methylated γ-cyclodextrin, comprising removing the protecting groups at the 6-position and the 6-position.
【請求項4】水酸基を保護基にて保護するための触媒と
して、酸化バリウムと水酸化バリウム・8水和物の混合
塩基を用いることを特徴とする請求項1乃至請求項3記
載のメチル化γ−シクロデキストリンの製造方法。
4. The methylation according to claim 1, wherein a mixed base of barium oxide and barium hydroxide octahydrate is used as a catalyst for protecting a hydroxyl group with a protecting group. A method for producing γ-cyclodextrin.
JP6971197A 1997-03-24 1997-03-24 Production of methylated gamma-cyclodextrin Pending JPH10265505A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6971197A JPH10265505A (en) 1997-03-24 1997-03-24 Production of methylated gamma-cyclodextrin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6971197A JPH10265505A (en) 1997-03-24 1997-03-24 Production of methylated gamma-cyclodextrin

Publications (1)

Publication Number Publication Date
JPH10265505A true JPH10265505A (en) 1998-10-06

Family

ID=13410703

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6971197A Pending JPH10265505A (en) 1997-03-24 1997-03-24 Production of methylated gamma-cyclodextrin

Country Status (1)

Country Link
JP (1) JPH10265505A (en)

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