JPH06107576A - Synthesis of cycloalkanedimethanol - Google Patents
Synthesis of cycloalkanedimethanolInfo
- Publication number
- JPH06107576A JPH06107576A JP28670092A JP28670092A JPH06107576A JP H06107576 A JPH06107576 A JP H06107576A JP 28670092 A JP28670092 A JP 28670092A JP 28670092 A JP28670092 A JP 28670092A JP H06107576 A JPH06107576 A JP H06107576A
- Authority
- JP
- Japan
- Prior art keywords
- ester
- aluminum hydride
- acid
- present
- cycloalkanedicarboxylic
- 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
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、殺虫剤、医薬中間体、
医薬修飾剤等として有用なシクロアルカンジメタノ−ル
の合成方法に関する。The present invention relates to an insecticide, a pharmaceutical intermediate,
The present invention relates to a method for synthesizing cycloalkane dimethanol useful as a pharmaceutical modifier and the like.
【0002】[0002]
【従来の技術】シクロアルカンジメタノ−ルは上記のご
とく重要な化学品である。従来の製造方法としては、テ
トラヒドロフラン溶媒中でシクロアルカンジカルボン酸
エチルエステルを水素化リチウムアルミニウムで還元す
る方法(特開平3−72459号公報,J.A.C.
S,109 6825(1987))、ジエチルエ−テ
ル溶媒中でシクロアルカンジカルボン酸エチルエステル
を水素化リチウムアルミニウムで還元する方法(J.O
rg.Chem.,79 381(1957))等が挙げ
られる。2. Description of the Related Art Cycloalkane dimethanol is an important chemical as mentioned above. As a conventional production method, a method in which cycloalkanedicarboxylic acid ethyl ester is reduced with lithium aluminum hydride in a tetrahydrofuran solvent (JP-A-3-72459, JAC).
S, 109 6825 (1987)), a method of reducing cycloalkanedicarboxylic acid ethyl ester with lithium aluminum hydride in a diethyl ether solvent (J.O.
rg. Chem. , 79 381 (1957)) and the like.
【0003】[0003]
【本発明が解決しようとする課題】しかしながら上記方
法では、還元剤として用いられる水素化リチウムアルミ
ニウムが空気中で自然発火しやすく、又、溶媒であるテ
トラヒドロフラン及びジエチルエ−テルが低沸点、低引
火点を示し爆発の危険性がある等の問題を有し、工業的
規模での実施においては不適当である。従って汎用溶媒
系で取り扱い容易な還元剤を用いたシクロアルカンジメ
タノ−ルの新たな合成方法が望まれている。However, in the above method, the lithium aluminum hydride used as the reducing agent is liable to spontaneously ignite in the air, and the solvents tetrahydrofuran and diethyl ether have low boiling points and low flash points. It is unsuitable for implementation on an industrial scale due to the problems such as the danger of explosion. Therefore, a new method for synthesizing cycloalkane dimethanol using a reducing agent which is easy to handle in a general-purpose solvent system is desired.
【0004】[0004]
【課題を解決するための手段】しかるに本発明者等はか
かる課題を解決すべく鋭意研究を重ねた結果、シクロア
ルカンジカルボン酸エステルをナトリウム水素化ビス
(2−エトキシメトキシ)アルミニウムにより還元した
場合にかかる目的に合致することを見いだし本発明を完
成するに至った。即ち、本発明は取り扱い容易なナトリ
ウム水素化ビス(2−エトキシメトキシ)アルミニウム
を還元剤として用いることにより、汎用溶媒系での反応
を容易にし工業的規模での実施を可能にした。以下、本
発明について詳述する。However, as a result of intensive studies to solve the above problems, the present inventors have found that when a cycloalkane dicarboxylic acid ester is reduced with sodium bis (2-ethoxymethoxy) aluminum hydride. The present invention has been completed by finding out that it meets the above-mentioned object. That is, the present invention facilitates the reaction in a general-purpose solvent system and makes it possible to carry out on an industrial scale by using bis (2-ethoxymethoxy) aluminum hydride, which is easy to handle, as a reducing agent. Hereinafter, the present invention will be described in detail.
【0005】本発明で用いられるシクロアルカンジカル
ボン酸エステルのエステルとしては、ジメチル、ジエチ
ル、ジ,n−プロピル、エチルメチル、ジ,iso−プ
ロピル,ジブチル等が挙げられる。かかる化合物を用る
際には単独あるいは2種以上併用しても差し支えない。
本発明において使用される還元剤はNaAlH2(OC
H2CH2OCH3)2で示される如きナトリウム水素化ビ
ス(2−エトキシメトキシ)アルミニウムである。該還
元剤の使用量はシクロアルカンジカルボン酸エステルに
対して1.9〜2.5倍モル、好ましくは1.95〜
2.2倍モルである。本発明で用いられる溶媒として
は、ベンゼン、トルエン、キシレン等の芳香族炭化水素
が挙げられる。かかる溶媒の使用量としてはシクロアル
カンジカルボン酸エステル重量部に対して2〜20重量
部、好ましくは6〜10重量部が適当である。Examples of the cycloalkanedicarboxylic acid ester used in the present invention include dimethyl, diethyl, di, n-propyl, ethylmethyl, di, iso-propyl and dibutyl. When such compounds are used, they may be used alone or in combination of two or more.
The reducing agent used in the present invention is NaAlH 2 (OC
H 2 CH 2 OCH 3 ) 2 sodium bis (2-ethoxymethoxy) aluminium hydride. The reducing agent is used in an amount of 1.9 to 2.5 times, preferably 1.95 to 2.5 times the molar amount of the cycloalkane dicarboxylic acid ester.
It is 2.2 times the molar amount. Examples of the solvent used in the present invention include aromatic hydrocarbons such as benzene, toluene and xylene. The amount of the solvent used is 2 to 20 parts by weight, preferably 6 to 10 parts by weight, based on the weight of the cycloalkane dicarboxylic acid ester.
【0006】本発明を実施するに当たっては、溶媒中に
シクロアルカンジカルボン酸エステル及びナトリウム水
素化ビス(2−エトキシメトキシ)アルミニウムを仕込
み還元を行う。かかる薬剤の仕込み方法は特に限定はな
く、一括仕込み、連続仕込み、滴下仕込み等が適宜採用
される。反応温度は室温〜溶媒の還流温度まで幅広く選
択できるが反応時間及び副反応の観点から60〜90℃
が好ましく、反応時間は1〜5時間、好ましくは2〜3
時間が有利である。反応終了後、反応液を10〜30℃
程度に冷却し、硫酸、塩酸等の鉱酸で還元剤を中和した
後、蒸留法等を用いて目的物を単離する。かかる目的物
は必要であれば更に精製を行なうことも可能である。In carrying out the present invention, cycloalkanedicarboxylic acid ester and sodium bis (2-ethoxymethoxy) aluminum hydride are charged and reduced in a solvent. The method of charging the chemical is not particularly limited, and batch charging, continuous charging, dropping charging and the like are appropriately adopted. The reaction temperature can be widely selected from room temperature to the reflux temperature of the solvent, but from the viewpoint of reaction time and side reaction, it is 60 to 90 ° C.
Is preferred, and the reaction time is 1 to 5 hours, preferably 2 to 3
Time is advantageous. After the reaction is completed, the reaction liquid is heated at 10 to 30 ° C.
After cooling to a certain degree and neutralizing the reducing agent with a mineral acid such as sulfuric acid or hydrochloric acid, the desired product is isolated by a distillation method or the like. If desired, the desired product can be further purified.
【0007】[0007]
【作 用】本発明は、汎用溶媒系で取り扱い容易な還
元剤を用いて反応が行なえるので工業的規模での実施に
おいて非常に有利にシクロアルカンジメタノ−ルを製造
し得る。OPERATION The present invention can produce a cycloalkane dimethanol very advantageously in an industrial scale since the reaction can be carried out in a general-purpose solvent system using a reducing agent which is easy to handle.
【0008】[0008]
【実施例】以下、本発明において実例を挙げて更に詳述
する。 実施例1 1.1−シクロプロパンジカルボン酸ジエチルエステル
4.7g(25ミリモル)をトルエン5mlと混合し
た。これを反応器中に仕込んでおいた25%ナトリウム
水素化ビス(2−エトキシメトキシ)アルミニウムトル
エン溶液47g(58ミリモル)に滴下した。滴下と共
に徐々に発熱するので85℃を越えないように制御し
た。滴下終了後内温を85℃に維持したまま2時間熟成
した後、内温が室温となるまで冷却し、30%硫酸水溶
液13mlを加え還元剤を中和した。次いでかかる反応
溶液にメタノ−ル30mlを加えて希釈したのち濾過し
た。濾液を蒸留に付し120℃/11mmHgの留出分
を集めて2.2g(21.5ミリモル)の1.1−シク
ロプロパンジメタノ−ルを得た。1.1−シクロプロパ
ンジカルボン酸エチルエステルに対する収率は86.0
%であった。1 H−NMR(CDCl3) δ:4.09(S,2
H),3.54(S,4H),0.46(S,4H).EXAMPLES Hereinafter, the present invention will be described in more detail with reference to actual examples. Example 1 1.1-Cyclopropanedicarboxylic acid diethyl ester 4.7 g (25 mmol) was mixed with 5 ml toluene. This was added dropwise to 47 g (58 mmol) of a 25% sodium bis (2-ethoxymethoxy) aluminum hydride toluene solution charged in the reactor. The temperature was controlled so that the temperature did not exceed 85 ° C. because the temperature gradually increased with dropping. After completion of the dropping, the mixture was aged for 2 hours while maintaining the internal temperature at 85 ° C., cooled to an internal temperature of room temperature, and 13 ml of 30% sulfuric acid aqueous solution was added to neutralize the reducing agent. Then, 30 ml of methanol was added to the reaction solution to dilute it and then filtered. The filtrate was subjected to distillation and a distillate fraction of 120 ° C./11 mmHg was collected to obtain 2.2 g (21.5 mmol) of 1.1-cyclopropanedimethanol. The yield based on 1.1-cyclopropanedicarboxylic acid ethyl ester was 86.0.
%Met. 1 H-NMR (CDCl 3 ) δ: 4.09 (S, 2
H), 3.54 (S, 4H), 0.46 (S, 4H).
【0009】実施例2 1.1−シクロプロパンジカルボン酸ジエチルエステル
に代えて1.1−シクロブタンジカルボン酸ジエチルエ
ステル5g(25ミリモル)を用いた以外は実施例1に
準じて実験を行った。蒸留により112℃/3.5mm
Hgの留出分を集めて2.4g(20.7ミリモル)の
1.1−シクロブタンジメタノ−ルを得た。1.1−シ
クロブタンジカルボン酸エチルエステルに対する収率は
82.8%であった。1 H−NMR(CDCl3) δ:4.09(br,S,
2H),3.63(S,4H),1.81(m,6
H).Example 2 An experiment was carried out in the same manner as in Example 1 except that 5 g (25 mmol) of 1.1-cyclobutanedicarboxylic acid diethyl ester was used in place of 1.1-cyclopropanedicarboxylic acid diethyl ester. 112 ° C / 3.5mm by distillation
The Hg distillate was collected to obtain 2.4 g (20.7 mmol) of 1.1-cyclobutane dimethanol. The yield based on 1.1-cyclobutanedicarboxylic acid ethyl ester was 82.8%. 1 H-NMR (CDCl 3 ) δ: 4.09 (br, S,
2H), 3.63 (S, 4H), 1.81 (m, 6)
H).
【0010】実施例3 マロン酸ジエチル100g(0.62モル)、1−ブロ
モ−3−クロロプロパン97.6g(0.62モル)、
エタノ−ル150mlを反応器に入れ、78℃まで加熱
した。この混合液に28%ナトリウムメチラ−トメタノ
−ル溶液240g(1.25モル)を2時間かけて滴下
した。滴下終了後、1時間熟成を行い反応系中のアルコ
−ル類を追い出した。この残査に水380mlを加えて
有機層を分液し、水層をトルエン120mlで抽出し
た。有機層とトルエン層をあわせて蒸留に付し77〜8
1℃/2.5mmHgの留出分50gを得た。ガスクロ
マトグラフィ−により分析したところ1.1−シクロブ
タンカルボン酸ジメチルエステル6.8g(40ミリモ
ル)、1.1−シクロブタンカルボン酸エチルメチルエ
ステル23.6g(0.13モル)、1.1−シクロブ
タンカルボン酸ジエチルエステル19.8g(98ミリ
モル)であった。次いで、かかる3成分混合エステル5
gを用い実施例1に準じて実験を行った。蒸留により1
12℃/3.5mmHgの留出分を集めて2.6g(2
2.4ミリモル)の1.1−シクロブタンジメタノ−ル
を得た。3成分混合エステルに対する収率は83.0%
であった。Example 3 100 g (0.62 mol) of diethyl malonate, 97.6 g (0.62 mol) of 1-bromo-3-chloropropane,
150 ml of ethanol was placed in the reactor and heated to 78 ° C. To this mixed solution, 240 g (1.25 mol) of a 28% sodium methylate methanol solution was added dropwise over 2 hours. After completion of the dropping, aging was carried out for 1 hour to expel alcohols in the reaction system. 380 ml of water was added to this residue, the organic layer was separated, and the aqueous layer was extracted with 120 ml of toluene. The organic layer and the toluene layer are combined and subjected to distillation 77 to 8
50 g of a distillate of 1 ° C./2.5 mmHg was obtained. When analyzed by gas chromatography, 1.1-cyclobutanecarboxylic acid dimethyl ester 6.8 g (40 mmol), 1.1-cyclobutanecarboxylic acid ethyl methyl ester 23.6 g (0.13 mol), 1.1-cyclobutanecarboxylic acid The acid diethyl ester was 19.8 g (98 mmol). Then, such a three-component mixed ester 5
An experiment was conducted in accordance with Example 1 using g. 1 by distillation
Collected distillate of 12 ° C / 3.5 mmHg, 2.6 g (2
2.4 mmol) of 1.1-cyclobutane dimethanol was obtained. Yield to 3 component mixed ester is 83.0%
Met.
【0011】対照例1 窒素気流下においてテトラヒドロフラン500mlに水
素化リチウムアルミニウム15g(0.4モル)を懸濁
し、0℃に冷却した。かかる溶液中にテトラヒドロフラ
ン250mlで希釈した1.1−シクロプロパンジカル
ボン酸ジエチルエステル50g(0.27モル)をゆっ
くり滴下した。滴下と共に反応液の液温が上昇するので
55℃を越えないように制御した。滴下終了後55℃を
維持したまま3時間撹拌を続けた。次いで水15ml,
15%水酸化ナトリウム水溶液15mlを逐次反応液に
加えた。かかる混合液をセライトを通して濾過し、濾液
を濃縮してテトラヒドロフランを除去した。得られた油
状物質を減圧蒸留に付し110℃/5mmHgの留出分
を集めて1.1−シクロプロパンジメタノ−ル17.7
g(0.17モル)を得た。1.1−シクロプロパンジ
カルボン酸ジエチルエステルに対する収率は63%であ
った。Control Example 1 15 g (0.4 mol) of lithium aluminum hydride was suspended in 500 ml of tetrahydrofuran under a nitrogen stream and cooled to 0 ° C. 50 g (0.27 mol) of 1.1-cyclopropanedicarboxylic acid diethyl ester diluted with 250 ml of tetrahydrofuran was slowly added dropwise to the solution. Since the liquid temperature of the reaction liquid rises with dropping, the temperature was controlled so as not to exceed 55 ° C. After completion of dropping, stirring was continued for 3 hours while maintaining 55 ° C. Then 15 ml of water,
15 ml of a 15% sodium hydroxide aqueous solution was sequentially added to the reaction solution. The mixture was filtered through Celite and the filtrate was concentrated to remove tetrahydrofuran. The obtained oily substance was subjected to vacuum distillation, and a distillate of 110 ° C./5 mmHg was collected to give 1.1-cyclopropanedimethanol 17.7.
g (0.17 mol) was obtained. The yield based on 1.1-cyclopropanedicarboxylic acid diethyl ester was 63%.
【0012】[0012]
【効 果】本発明は、殺虫剤、医薬中間体、医薬修飾
剤として有用なシクロアルカンジメタノ−ルを汎用溶媒
系で取り扱い容易な還元剤を用いて製造できるので工業
的に非常に有利である。[Effect] The present invention is industrially very advantageous because cycloalkane dimethanol useful as an insecticide, a pharmaceutical intermediate, and a pharmaceutical modifier can be produced in a general-purpose solvent system using a reducing agent that is easy to handle. is there.
Claims (1)
ナトリウム水素化ビス(2−エトキシメトキシ)アルミ
ニウムにより還元することを特徴とするシクロアルカン
ジメタノ−ルの合成方法1. A method for synthesizing a cycloalkane dimethanol, which comprises reducing a cycloalkane dicarboxylic acid ester with sodium bis (2-ethoxymethoxy) aluminum hydride.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28670092A JPH06107576A (en) | 1992-09-30 | 1992-09-30 | Synthesis of cycloalkanedimethanol |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28670092A JPH06107576A (en) | 1992-09-30 | 1992-09-30 | Synthesis of cycloalkanedimethanol |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06107576A true JPH06107576A (en) | 1994-04-19 |
Family
ID=17707857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP28670092A Pending JPH06107576A (en) | 1992-09-30 | 1992-09-30 | Synthesis of cycloalkanedimethanol |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06107576A (en) |
-
1992
- 1992-09-30 JP JP28670092A patent/JPH06107576A/en active Pending
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