JPH0977758A - Production of tetrahydrofuran derivative - Google Patents

Production of tetrahydrofuran derivative

Info

Publication number
JPH0977758A
JPH0977758A JP7232329A JP23232995A JPH0977758A JP H0977758 A JPH0977758 A JP H0977758A JP 7232329 A JP7232329 A JP 7232329A JP 23232995 A JP23232995 A JP 23232995A JP H0977758 A JPH0977758 A JP H0977758A
Authority
JP
Japan
Prior art keywords
derivative
water
group
formula
benzyl
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
JP7232329A
Other languages
Japanese (ja)
Inventor
Shinichi Inoue
伸一 井上
Sunao Nakagawa
直 中川
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.)
Kuraray Co Ltd
Original Assignee
Kuraray 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 Kuraray Co Ltd filed Critical Kuraray Co Ltd
Priority to JP7232329A priority Critical patent/JPH0977758A/en
Publication of JPH0977758A publication Critical patent/JPH0977758A/en
Pending legal-status Critical Current

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Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/52Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Furan Compounds (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PROBLEM TO BE SOLVED: To produce a tetrahydrofuran derivative useful as an intermediate for pharmaceuticals from easily available raw materials on an industrial scale at a low cost without using highly toxic expensive reagents by reductively cyclizing a specific derivative using a metallic catalyst in the presence of an acidic substance and water. SOLUTION: The objective derivative of formula II (e.g. 2-hydroxy-4- benzyltetrahydrofuran) is produced by the reductive cyclization of a 4- hydroxybutanonitrile derivative of formula I [R<1> to R<6> are each H, a (substituted) alkyl, an aryl or an aralkyl] [e.g. (R)-3-benzyl-4- hydroxybutanonitrile] with a metallic catalyst (e.g. Raney nickel) in the presence of an acidic substance (e.g. acetic acid) and water. The reaction is carried out preferably in a solvent such as a water-ethanol mixture in a hydrogen atmosphere at about 10-100 deg.C under a hydrogen pressure of about 1-100kg/m<2> .

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、2−ヒドロキシテ
トラヒドロフラン誘導体の製造方法に関する。本発明に
より製造される2−ヒドロキシテトラヒドロフラン誘導
体は、種々の医薬、農薬の中間体として、例えば抗炎症
剤、鎮痛剤として効果が期待されている(1S,4R)
−シス−1−エチル−1,3,4,9−テトラヒドロ−
4−(フェニルメチル)ピラノ[3,4−b]インドー
ル−1−酢酸の合成中間体として有用である。
TECHNICAL FIELD The present invention relates to a method for producing a 2-hydroxytetrahydrofuran derivative. The 2-hydroxytetrahydrofuran derivative produced by the present invention is expected to be effective as an intermediate for various medicines and agricultural chemicals, for example, as an anti-inflammatory agent and an analgesic agent (1S, 4R).
-Cis-1-ethyl-1,3,4,9-tetrahydro-
It is useful as a synthetic intermediate for 4- (phenylmethyl) pyrano [3,4-b] indole-1-acetic acid.

【0002】[0002]

【従来の技術】従来、2−ヒドロキシテトラヒドロフラ
ン誘導体の製造方法としては、例えば、シンナミルア
ルコールを原料とし、アゾビスイソブチロニトリル−水
素化トリブチルスズを用いるブロモアセタールのラジカ
ル環化を経由して2−ヒドロキシ−4−ベンジルテトラ
ヒドロフランを製造する方法[シンセティック・コミュ
ニケーションズ(Synthetic Communications)、22巻、
8 号、1127頁(1992年)参照]、2−置換−2−プロ
ペノールを原料として、ロジウム触媒下、オキソ反応に
より2−ヒドロキシ−4−メチルテトラヒドロフランを
製造する方法[ジャーナル・オブ・オーガニック・ケミ
ストリー(Journal of Organic Chemistry)、37巻、18
35-1837 頁(1972年)参照]などが知られている。
2. Description of the Related Art Conventionally, as a method for producing a 2-hydroxytetrahydrofuran derivative, for example, cinnamyl alcohol is used as a raw material and azobisisobutyronitrile-tributyltin hydride is used to effect radical cyclization of bromoacetal. -Method for producing 4-hydroxy-4-benzyltetrahydrofuran [Synthetic Communications, Volume 22,
No. 8, p. 1127 (1992)], a method for producing 2-hydroxy-4-methyltetrahydrofuran by an oxo reaction with a 2-substituted-2-propenol as a raw material in the presence of a rhodium catalyst [Journal of Organic Chemistry]. (Journal of Organic Chemistry), Volume 37, 18
35-1837 (1972)], etc. are known.

【0003】[0003]

【発明が解決しようとする課題】上記のブロモアセタ
ールのラジカル環化を経由する方法では、中間体となる
ブロモアセタールの合成にN−ブロモスクシンイミド等
の高価な試薬を用いており、また、環化反応においては
スズ化合物およびシアン化合物のような毒性が高く、高
価で、しかも工業的に取扱いの難しい試薬や技術を用い
る必要がある。また、上記の方法では、原料の2−置
換−2−プロペノールを製造するに際し、アルキルアル
デヒドをマンニッヒ反応に付すことによりα−アルキル
アクロレインとした後、水素化リチウムアルミニウムで
還元するという方法で製造しているが、この原料合成に
使用する還元剤が高価であり、工業的に有利な方法とは
いい難い。しかも、いずれの方法も光学活性化合物を合
成する目的には使用できない。しかして、本発明の目的
は、高価で毒性の高い試薬を用いることなく、容易に入
手可能な原料から2−ヒドロキシテトラヒドロフラン誘
導体を工業的に有利に製造する方法を提供することにあ
る。
In the above-mentioned method via radical cyclization of bromoacetal, an expensive reagent such as N-bromosuccinimide is used for the synthesis of bromoacetal as an intermediate, and the cyclization is also performed. In the reaction, it is necessary to use reagents and techniques that are highly toxic, expensive, and industrially difficult to handle, such as tin compounds and cyan compounds. Further, in the above-mentioned method, when the starting 2-substituted-2-propenol is produced, it is produced by a method in which an alkyl aldehyde is subjected to a Mannich reaction to obtain α-alkylacrolein and then reduced with lithium aluminum hydride. However, the reducing agent used for synthesizing this raw material is expensive, and it is difficult to say that it is an industrially advantageous method. Moreover, neither method can be used for the purpose of synthesizing an optically active compound. Therefore, it is an object of the present invention to provide a method for industrially advantageously producing a 2-hydroxytetrahydrofuran derivative from an easily available raw material without using an expensive and highly toxic reagent.

【0004】[0004]

【課題を解決するための手段】本発明によれば、上記の
目的は、一般式(I)
According to the present invention, the above objects have been achieved by the general formula (I)

【0005】[0005]

【化3】 Embedded image

【0006】(式中、R1 、R2 、R3 、R4 、R5
よびR6 は水素原子または置換基を有していてもよいア
ルキル基、アリール基もしくはアラルキル基を表す。)
で示される4−ヒドロキシブタンニトリル誘導体(以
下、これを4−ヒドロキシブタンニトリル誘導体(I)
と略記することがある)を酸性物質および水の存在下、
金属触媒を用いて還元的に環化させることを特徴とする
一般式(II)
(In the formula, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 represent a hydrogen atom or an optionally substituted alkyl group, aryl group or aralkyl group.)
4-hydroxybutanenitrile derivative (hereinafter referred to as 4-hydroxybutanenitrile derivative (I)
In the presence of acidic substances and water,
General formula (II) characterized by reductive cyclization using a metal catalyst

【0007】[0007]

【化4】 Embedded image

【0008】(式中、R1 、R2 、R3 、R4 、R5
よびR6 は前記定義のとおりである。)で示される2−
ヒドロキシテトラヒドロフラン誘導体(以下、これを2
−ヒドロキシテトラヒドロフラン誘導体(II)と略記す
ることがある)の製造方法を提供することにより達成さ
れる。
(Wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are as defined above)
Hydroxytetrahydrofuran derivative (hereinafter referred to as 2
-Hydroxytetrahydrofuran derivative (II) may be abbreviated).

【0009】[0009]

【発明の実施の形態】前記一般式(I)および(II)に
おいて、R1 、R2 、R3 、R4 、R5 およびR6 が表
すアルキル基としては、直鎖状または分岐鎖状のいずれ
でもよく、炭素数1〜10のアルキル基が好ましく、例
えば、メチル基、エチル基、プロピル基、ブチル基、ヘ
キシル基、オクチル基、デシル基などが挙げられる。ま
た、アリール基としては、例えばフェニル基、ナフチル
基などが挙げられ、アラルキル基としてはベンジル基な
どが挙げられる。これらのアルキル基、アリール基およ
びアラルキル基は置換基を有していてもよく、置換基と
しては塩素原子、臭素原子などのハロゲン原子が挙げら
れる。また、アリール基およびアラルキル基のアリール
基部分は置換基として、メチル基、エチル基、プロピル
基などの炭素数1〜6の低級アルキル基を有していても
よい。
BEST MODE FOR CARRYING OUT THE INVENTION In the general formulas (I) and (II), the alkyl group represented by R 1 , R 2 , R 3 , R 4 , R 5 and R 6 is linear or branched. Any of these may be used, and an alkyl group having 1 to 10 carbon atoms is preferable, and examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, an octyl group, and a decyl group. Further, examples of the aryl group include a phenyl group and a naphthyl group, and examples of the aralkyl group include a benzyl group. These alkyl group, aryl group and aralkyl group may have a substituent, and examples of the substituent include halogen atoms such as chlorine atom and bromine atom. The aryl group and the aryl group portion of the aralkyl group may have a lower alkyl group having 1 to 6 carbon atoms such as a methyl group, an ethyl group, and a propyl group as a substituent.

【0010】原料である4−ヒドロキシブタンニトリル
誘導体(I)は、光学活性体、ラセミ体いずれでもよ
く、ジャーナル・オブ・オーガニック・ケミストリー
(Journal of Organic Chemistry)、58巻、5717-5723
頁(1993年)または特開平6−25173号公報に記載
の方法にしたがって製造することができる。例えば、2
−ベンジル−1,3−プロパンジオールを出発原料と
し、これをシュードモナス属等の微生物に由来するエス
テラーゼを使用し、酢酸無水物、酢酸ビニルなどのアシ
ル化剤で不斉アシル化することにより光学活性モノエス
テル体とし、水酸基をトシル化し、青酸ナトリウム等と
反応させることによってニトリル基を導入し、エステル
を加水分解することによって、光学活性な3−ベンジル
−4−ヒドロキシブタンニトリルを製造することができ
る。また、2−メチル−1,3−プロパンジオールを原
料とし、塩化チオニル等で環状スルフィネートとした
後、青酸ナトリウムで加熱処理することにより、3−メ
チル−4−ヒドロキシブタンニトリル(ラセミ体)を製
造することができる。
The 4-hydroxybutanenitrile derivative (I) as a raw material may be either an optically active substance or a racemic substance, and Journal of Organic Chemistry, Volume 58, 5717-5723.
Page (1993) or the method described in JP-A-6-25173. For example, 2
-Benzyl-1,3-propanediol is used as a starting material, and this is asymmetrically acylated with an acylating agent such as acetic anhydride or vinyl acetate using an esterase derived from a microorganism such as Pseudomonas sp. An optically active 3-benzyl-4-hydroxybutanenitrile can be produced by forming a monoester, tosylating a hydroxyl group, introducing a nitrile group by reacting with sodium cyanide, etc., and hydrolyzing the ester. . In addition, 2-methyl-1,3-propanediol is used as a raw material, and after forming a cyclic sulfinate with thionyl chloride or the like, it is heat-treated with sodium cyanide to produce 3-methyl-4-hydroxybutanenitrile (racemic body). can do.

【0011】4−ヒドロキシブタンニトリル誘導体
(I)から、2−ヒドロキシテトラヒドロフラン誘導体
(II)への還元的環化反応に使用する金属触媒として
は、ニトリルをイミンに還元する能力をもつ一般的金属
触媒、例えば、ラネーニッケル、ラネーコバルト、パラ
ジウム−炭素、白金−炭素、酸化白金等が挙げられる
が、ラネーニッケルが好ましい。触媒の使用量は、4−
ヒドロキシブタンニトリル誘導体(I)1モルに対して
通常約0.00001〜0.5モルの範囲が好ましい。
The metal catalyst used in the reductive cyclization reaction of 4-hydroxybutanenitrile derivative (I) to 2-hydroxytetrahydrofuran derivative (II) is a general metal catalyst having an ability to reduce nitrile to imine. Examples include Raney nickel, Raney cobalt, palladium-carbon, platinum-carbon, platinum oxide, and the like, with Raney nickel being preferred. The amount of catalyst used is 4-
Usually, the range of about 0.00001 to 0.5 mol is preferable with respect to 1 mol of the hydroxybutanenitrile derivative (I).

【0012】酸性物質としては、酢酸等の有機酸、塩
酸、硫酸、トシル酸などの強酸などが使用可能である
が、酢酸を用いるのが好ましい。酸性物質の使用量は、
4−ヒドロキシブタンニトリル誘導体(I)1モルに対
して通常約1〜30モルの範囲が好ましい。
As the acidic substance, organic acids such as acetic acid and strong acids such as hydrochloric acid, sulfuric acid and tosylic acid can be used, but acetic acid is preferably used. The amount of acidic substances used is
Usually, a range of about 1 to 30 mol is preferable with respect to 1 mol of the 4-hydroxybutanenitrile derivative (I).

【0013】反応は、溶媒中で行うのが好ましく、溶媒
としては、水、または水とメタノール、エタノール等の
アルコール系溶媒;ジオキサン、テトラヒドロフラン等
のエーテル系溶媒;ベンゼン、トルエン等の炭化水素系
溶媒との混合溶媒などが使用できる。反応は水素雰囲気
下で行われ、約10〜100℃の範囲内の温度、約1〜
100kg/cm2 の範囲内の水素圧下で行われること
が好ましい。
The reaction is preferably carried out in a solvent, and as the solvent, water or an alcohol solvent such as water and methanol or ethanol; an ether solvent such as dioxane or tetrahydrofuran; a hydrocarbon solvent such as benzene or toluene. A mixed solvent with and the like can be used. The reaction is carried out under a hydrogen atmosphere at a temperature in the range of about 10-100 ° C, about 1-
It is preferably carried out under hydrogen pressure within the range of 100 kg / cm 2 .

【0014】このようにして得られる2−ヒドロキシテ
トラヒドロフラン誘導体(II)の単離・精製は、通常の
有機化合物の単離・精製において用いられる方法と同様
にして行われる。例えば、反応混合物に、酢酸エチル、
ジエチルエーテル、塩化メチレン等の有機溶媒を加え、
得られた溶液を飽和重層水、飽和食塩水で洗浄する。次
いで、有機層を乾燥、濃縮することによって、粗生成物
を得ることができる。この粗生成物を酢酸エチルとヘキ
サン等の有機溶媒で再結晶することによって光学純度の
高い目的物を得ることができる。
Isolation and purification of the 2-hydroxytetrahydrofuran derivative (II) thus obtained is carried out in the same manner as the method used in the usual isolation and purification of organic compounds. For example, the reaction mixture may include ethyl acetate,
Add an organic solvent such as diethyl ether or methylene chloride,
The obtained solution is washed with saturated multistory water and saturated saline. Then, the organic layer is dried and concentrated to obtain a crude product. By recrystallizing this crude product with an organic solvent such as ethyl acetate and hexane, a target product having high optical purity can be obtained.

【0015】2−ヒドロキシテトラヒドロフラン誘導体
(II)は、例えば酸性条件下で脱水反応に付すことによ
り、2,3−ジヒドロフラン誘導体に、また、酸性条件
下でメタノール、エタノール等のアルコールと反応させ
ることにより、テトラヒドロフランエーテル誘導体に変
換させることが可能であり、いずれも種々の医薬、農薬
中間体として有用である。
The 2-hydroxytetrahydrofuran derivative (II) is reacted with a 2,3-dihydrofuran derivative by subjecting it to a dehydration reaction under acidic conditions, or with an alcohol such as methanol or ethanol under acidic conditions. It is possible to convert it into a tetrahydrofuran ether derivative by means of, and both are useful as intermediates for various medicines and agricultural chemicals.

【0016】[0016]

【実施例】以下、本発明を実施例によりさらに具体的に
説明するが、本発明はこれらの実施例により限定される
ものではない。
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.

【0017】参考例1 (R)−3−ベンジル−4−ヒドロキシブタンニトリル
の製造 2−ベンジル−1,3−プロパンジオール135gをヘ
キサン675mlに溶解し、得られた溶液に酢酸ビニル
84.6gおよびリパーゼQL(名糖産業株式会社製)
1.2gを加え、37℃で19時間攪拌した。このとき
の転化率は97%であり、生成した2−ベンジル−3−
ヒドロキシプロピルアセテートの光学純度は92%e.
e.であった。反応混合液から酵素を濾別した後、減圧
濃縮し、(R)−2−ベンジル−3−ヒドロキシプロピ
ルアセテートを202g得た。この(R)−2−ベンジ
ル−3−ヒドロキシプロピルアセテート202gを塩化
メチレン300mlに溶解した後、得られた溶液にトリ
エチルアミン191mlを加えた。混合液を氷温冷却
後、パラトルエンスルホニルクロリド217gを加え、
3時間室温で反応させた。反応混合液に、酢酸エチル、
水を加えて分液した。有機層を飽和重曹水、飽和食塩水
で洗浄した後、無水硫酸ナトリウムで乾燥し、減圧下に
濃縮することによって粗生成物を得た。粗生成物を酢酸
エチル100mlに溶解した後、得られた溶液にヘキサ
ン200mlを加えた。生成した結晶を濾取、洗浄し、
光学純度97%e.e.の(S)−2−ベンジル−3−
[(パラトルエンスルホニル)オキシ]プロピルアセテ
ートを299g得た。このうちの99gをジメチルスル
ホキシド670mlに溶解し、得られた溶液に青酸ナト
リウム15.8gを加えて60℃で2時間攪拌した。反
応混合液にイソプロピルエーテル、水を加えて分液し
た。有機層を飽和食塩水で洗浄した後、無水硫酸ナトリ
ウムで乾燥し、減圧下で濃縮することによって粗(R)
−2−ベンジル−3−シアノプロピルアセテート56.
6gを得た。これをテトラヒドロフラン420ml、水
140mlに溶解し、得られた溶液に水酸化リチウム1
水和物11.9gを加え、室温で24時間攪拌した。反
応混合液を酢酸エチルで抽出し、有機層を水、飽和食塩
水で洗浄した後、無水硫酸ナトリウムで乾燥した。これ
を減圧下で濃縮した後、シリカゲルカラムクロマトグラ
フィーにより、37.9gの(R)−3−ベンジル−4
−ヒドロキシブタンニトリルを得た。
Reference Example 1 Preparation of (R) -3-benzyl-4-hydroxybutanenitrile 135 g of 2-benzyl-1,3-propanediol was dissolved in 675 ml of hexane, and 84.6 g of vinyl acetate and Lipase QL (manufactured by Meito Sangyo Co., Ltd.)
1.2g was added and it stirred at 37 degreeC for 19 hours. The conversion rate at this time was 97%, and the produced 2-benzyl-3-
The optical purity of hydroxypropyl acetate is 92% e.
e. Met. The enzyme was filtered off from the reaction mixture and then concentrated under reduced pressure to obtain 202 g of (R) -2-benzyl-3-hydroxypropyl acetate. 202 g of this (R) -2-benzyl-3-hydroxypropyl acetate was dissolved in 300 ml of methylene chloride, and then 191 ml of triethylamine was added to the resulting solution. After cooling the mixture on ice, 217 g of paratoluenesulfonyl chloride was added,
The reaction was carried out at room temperature for 3 hours. Ethyl acetate,
Water was added for liquid separation. The organic layer was washed with saturated aqueous sodium hydrogen carbonate and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a crude product. The crude product was dissolved in 100 ml of ethyl acetate, and then 200 ml of hexane was added to the resulting solution. The crystals formed are collected by filtration, washed,
Optical purity 97% e. e. (S) -2-benzyl-3-
299 g of [(paratoluenesulfonyl) oxy] propyl acetate was obtained. 99 g of this was dissolved in 670 ml of dimethylsulfoxide, 15.8 g of sodium cyanide was added to the resulting solution, and the mixture was stirred at 60 ° C. for 2 hours. Isopropyl ether and water were added to the reaction mixture to separate the layers. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give crude (R)
-2-benzyl-3-cyanopropyl acetate 56.
6 g was obtained. This was dissolved in 420 ml of tetrahydrofuran and 140 ml of water, and 1 mL of lithium hydroxide was added to the resulting solution.
The hydrate (11.9 g) was added, and the mixture was stirred at room temperature for 24 hours. The reaction mixture was extracted with ethyl acetate, the organic layer was washed with water and saturated brine, and dried over anhydrous sodium sulfate. This was concentrated under reduced pressure and then subjected to silica gel column chromatography to give 37.9 g of (R) -3-benzyl-4.
-Hydroxybutanenitrile was obtained.

【0018】実施例1 (R)−3−ベンジル−4−ヒドロキシブタンニトリル
4gを脱気した50%酢酸水溶液20mlに溶解し、得
られた溶液にラネーニッケル0.4gを加え、オートク
レーブ中、50℃、10kg/cm2 で7時間反応させ
た。反応液から触媒を濾別し、濾液を水酸化ナトリウム
水溶液で中和した後、酢酸エチルで抽出した。有機層を
水、飽和食塩水で洗浄し、無水硫酸ナトリウムを用いて
乾燥した後、減圧下に濃縮した。生成物をカラムクロマ
トグラフィーにより分離精製することにより、下記の物
性を有する2−ヒドロキシ−4−ベンジルテトラヒドロ
フラン2.5gを得た。
Example 1 4 g of (R) -3-benzyl-4-hydroxybutanenitrile was dissolved in 20 ml of degassed 50% acetic acid aqueous solution, 0.4 g of Raney nickel was added to the resulting solution, and the mixture was autoclaved at 50 ° C. The reaction was performed at 10 kg / cm 2 for 7 hours. The catalyst was filtered off from the reaction solution, the filtrate was neutralized with an aqueous sodium hydroxide solution, and then extracted with ethyl acetate. The organic layer was washed with water and saturated saline, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. By separating and purifying the product by column chromatography, 2.5 g of 2-hydroxy-4-benzyltetrahydrofuran having the following physical properties was obtained.

【0019】1H−NMRスペクトル(270MH
z)、CDCl3 、TMS、δ:1.56-2.86(m,5H), 3.5
0-4.10(m,3H), 5.50-5.55(m,1H), 7.11-7.30(m,5H)
1 H-NMR spectrum (270 MH
z), CDCl 3 , TMS, δ: 1.56-2.86 (m, 5H), 3.5
0-4.10 (m, 3H), 5.50-5.55 (m, 1H), 7.11-7.30 (m, 5H)

【0020】実施例2 (R)−3−ベンジル−4−ヒドロキシブタンニトリル
400mgを脱気したテトラヒドロフラン16mlおよ
び50%酢酸水溶液4mlの混合溶媒に溶解し、得られ
た溶液にラネーニッケル40mgを加え、オートクレー
ブ中、50℃、10kg/cm2 で18時間反応させ
た。反応液から触媒を濾別し、濾液を水酸化ナトリウム
水溶液で中和した後、酢酸エチルで抽出した。有機層を
水、飽和食塩水で洗浄し、無水硫酸ナトリウムを用いて
乾燥した後、減圧下に濃縮した。生成物をカラムクロマ
トグラフィーにより分離精製することにより、実施例1
で得られたと同じ物性を有する2−ヒドロキシ−4−ベ
ンジルテトラヒドロフラン150mgを得た。
Example 2 400 mg of (R) -3-benzyl-4-hydroxybutanenitrile was dissolved in a mixed solvent of 16 ml of degassed tetrahydrofuran and 4 ml of 50% acetic acid aqueous solution, and 40 mg of Raney nickel was added to the resulting solution, followed by autoclaving. The reaction was carried out at 50 ° C. and 10 kg / cm 2 for 18 hours. The catalyst was filtered off from the reaction solution, the filtrate was neutralized with an aqueous sodium hydroxide solution, and then extracted with ethyl acetate. The organic layer was washed with water and saturated saline, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. Example 1 was obtained by separating and purifying the product by column chromatography.
There was obtained 150 mg of 2-hydroxy-4-benzyltetrahydrofuran having the same physical properties as obtained in.

【0021】[0021]

【発明の効果】本発明によれば、2−ヒドロキシテトラ
ヒドロフラン誘導体(II)を工業的に有利に製造するこ
とができる。
INDUSTRIAL APPLICABILITY According to the present invention, the 2-hydroxytetrahydrofuran derivative (II) can be industrially produced advantageously.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 一般式(I) 【化1】 (式中、R1 、R2 、R3 、R4 、R5 およびR6 は水
素原子または置換基を有していてもよいアルキル基、ア
リール基もしくはアラルキル基を表す。)で示される4
−ヒドロキシブタンニトリル誘導体を酸性物質および水
の存在下、金属触媒を用いて還元的に環化させることを
特徴とする一般式(II) 【化2】 (式中、R1 、R2 、R3 、R4 、R5 およびR6 は前
記定義のとおりである。)で示される2−ヒドロキシテ
トラヒドロフラン誘導体の製造方法。
1. A compound of the general formula (I) (In the formula, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 represent a hydrogen atom or an optionally substituted alkyl group, aryl group or aralkyl group).
-Hydroxybutanenitrile derivative is reductively cyclized using a metal catalyst in the presence of an acidic substance and water. (In the formula, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are as defined above.) A method for producing a 2-hydroxytetrahydrofuran derivative.
JP7232329A 1995-09-11 1995-09-11 Production of tetrahydrofuran derivative Pending JPH0977758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7232329A JPH0977758A (en) 1995-09-11 1995-09-11 Production of tetrahydrofuran derivative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7232329A JPH0977758A (en) 1995-09-11 1995-09-11 Production of tetrahydrofuran derivative

Publications (1)

Publication Number Publication Date
JPH0977758A true JPH0977758A (en) 1997-03-25

Family

ID=16937496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7232329A Pending JPH0977758A (en) 1995-09-11 1995-09-11 Production of tetrahydrofuran derivative

Country Status (1)

Country Link
JP (1) JPH0977758A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001163866A (en) * 1999-12-07 2001-06-19 Kuraray Co Ltd Method for producing 3-methyl-tetrahydrofuran
KR100614546B1 (en) * 2004-09-13 2006-08-25 한국과학기술연구원 Tetrahydrofuran cyclic compounds having high stereoselectivity, and Process for preparing them

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001163866A (en) * 1999-12-07 2001-06-19 Kuraray Co Ltd Method for producing 3-methyl-tetrahydrofuran
KR100614546B1 (en) * 2004-09-13 2006-08-25 한국과학기술연구원 Tetrahydrofuran cyclic compounds having high stereoselectivity, and Process for preparing them

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