JPS6034933B2 - Method for producing cis-3-hexenol - Google Patents

Method for producing cis-3-hexenol

Info

Publication number
JPS6034933B2
JPS6034933B2 JP943479A JP943479A JPS6034933B2 JP S6034933 B2 JPS6034933 B2 JP S6034933B2 JP 943479 A JP943479 A JP 943479A JP 943479 A JP943479 A JP 943479A JP S6034933 B2 JPS6034933 B2 JP S6034933B2
Authority
JP
Japan
Prior art keywords
hexenol
cis
dihydropyran
methyl
reaction
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.)
Expired
Application number
JP943479A
Other languages
Japanese (ja)
Other versions
JPS55102531A (en
Inventor
東洋彦 小林
治樹 鶴田
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.)
Takasago International Corp
Original Assignee
Takasago Perfumery Industry Co
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 Takasago Perfumery Industry Co filed Critical Takasago Perfumery Industry Co
Priority to JP943479A priority Critical patent/JPS6034933B2/en
Publication of JPS55102531A publication Critical patent/JPS55102531A/en
Publication of JPS6034933B2 publication Critical patent/JPS6034933B2/en
Expired legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pyrane Compounds (AREA)

Description

【発明の詳細な説明】 本発明はシス−3−へキセノールの新規な製造方法に関
する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel method for producing cis-3-hexenol.

シス−3−へキセノールは青葉アルコールと称され、植
物界、例えば茶生葉、キュウリ、トマト、小松菜等の木
の葉、野菜類、およびリンコ、ナシ、ブドウ等の果実に
広く存在し、新鮮な青葉のような香気を与える化合物で
ある。
Cis-3-hexenol is called green leaf alcohol, and is widely present in the plant kingdom, such as leaves of tea leaves, cucumbers, tomatoes, mustard mustard, vegetables, and fruits such as apples, pears, and grapes. It is a compound that gives off a similar aroma.

近年、この化合物は香料及びフレィバーの原料としての
需要が増大したため、その工業的な製造が必要となり、
多くの製造法が研究され報告がなされている。シス−3
ーヘキセノールの製造上の最大の難点は、如何にして3
位の2重結合を選択的にシス体とするかにあり、現在報
告されているシス−3ーヘキセノールの最も確実で、実
用的な方法は3ーヘキシノールを製造し、この3重結合
を選択的に還元する方法である。
In recent years, the demand for this compound as a raw material for fragrances and flavors has increased, necessitating its industrial production.
Many manufacturing methods have been studied and reported. cis-3
- The biggest difficulty in producing hexenol is how to
The most reliable and practical method for producing cis-3-hexenol currently reported is to produce 3-hexenol and selectively convert the triple bond into the cis form. This is a way to give back.

3−へキシノールを製造する最も代表的な方法は、ェフ
・ゾソドハィマー(F・Son側eimer)の方法〔
Joumal oftheChemicalSocie
ty,第877頁(1950年)〕であり、従ってシス
−3ーヘキセノールは次式mに従って製造される。
The most typical method for producing 3-hexynol is the method of F. Son.
Journal of the Chemical Society
ty, p. 877 (1950)], and therefore cis-3-hexenol is prepared according to the following formula m.

CHECH液体アンモニアCH章C.NaC2日51N
aC2&C三CH液体アンモニアC2比C三C.NaN
a整髪きソ寺モキ…夫C2はC三C‐CH2CH20N
aH20C2QC三C.CH2CH2○Hリンドラ−触
媒C2日5−CH−CH−CH2CH20日
・・……・式{1}しかしながら、式{1}で表わ
される方法は、原料のアセチレンから6工程を要すると
共に収率も20〜30%を極めて低い。
CHECH Liquid Ammonia CH Chapter C. NaC 2 days 51N
aC2&C3CH liquid ammonia C2 ratio C3C. NaN
a hair styling temple moki...husband C2 is C3C-CH2CH20N
aH20C2QC3C. CH2CH2○H Lindlar Catalyst C 2 days 5-CH-CH-CH2CH 20 days
...Formula {1} However, the method represented by formula {1} requires six steps from the raw material acetylene and has an extremely low yield of 20 to 30%.

また、環状化合物の環中のシス型2重結合を最後まで保
持して、本質的にシス型2重結合のみを得ることにより
シスー3ーヘキセノールを製造する方法が知られており
(米国特許第39623弦号)、これは次式{21によ
って示される。
In addition, a method is known for producing cis-3-hexenol by retaining the cis-type double bond in the ring of a cyclic compound until the end to obtain essentially only the cis-type double bond (US Pat. No. 396233). chord number), which is shown by the following equation {21.

(式中、Riは低級アルキル基を示す) しかしながら、式■で表わされる方法の総合理論収率は
38.3%であるが、5工程をも必要とし、しかもこの
工程中には工業上実際的でない反応工程を含み、工業的
方法として不利なるを免れない。
(In the formula, Ri represents a lower alkyl group.) However, although the overall theoretical yield of the method represented by formula (1) is 38.3%, it requires five steps, and in addition, there are This method is inevitably disadvantageous as an industrial method because it involves unreliable reaction steps.

そこで、本発明者は斯る従来法の欠点を克服せんと鋭意
研究を行った結果、2−メチル−5,6−ジヒドロピラ
ンをアミン中でアルカリ金属で還元すればシス−3ーヘ
キセノールが得られること、並びに2−メチル−5,6
−ジヒドロピランを得るための新規な方法を見出し、本
発明を完成した。
Therefore, the present inventor conducted intensive research to overcome the drawbacks of the conventional method, and found that cis-3-hexenol can be obtained by reducing 2-methyl-5,6-dihydropyran with an alkali metal in an amine. and 2-methyl-5,6
-We have discovered a new method for obtaining dihydropyran and completed the present invention.

2−メチル−5,6ージヒドロピランを製造する方法と
しては、従来、■アリルカルビノールとァセトアルデヒ
ドを酸の存在下縮合させる方法〔 E・Hanschk
e:Chem.Ber.,88,1053(1955)
〕、及び@3,4−ジヒドロ−2H−ピランを塩素又は
臭素と処理してジハロゲン化合物となし、これにメチル
マグネシウムブロマイドを作用せしめてメチル化し、次
いで脱ハロゲン化する方法〔G.Bem,G.Cate
lani,M.Fenetti & L.Montj
:Tetrahedron 30,4013(1974
)及び0.Ri0b’e:Compt.rend.,2
26,1625(1948)〕が知られている。
Conventionally, as a method for producing 2-methyl-5,6-dihydropyran, there is a method in which allyl carbinol and acetaldehyde are condensed in the presence of an acid [E. Hanschk
e:Chem. Ber. , 88, 1053 (1955)
[G. Bem, G. Cate
lani, M. Fenetti &L. Montj
:Tetrahedron 30, 4013 (1974
) and 0. Ri0b'e:Compt. rend. ,2
26, 1625 (1948)] is known.

しかしながら、■の方法は2種類の2ーメチル−ジヒド
ロピランを生成し、これらの分離精製が困難である欠点
を有し、また、@の方法は収率が悪く、工業的方法とし
ては不適当である。ところが、本発明者は、石油化学製
品として安価に入手できる1,3−ペンタジェン(シス
・トランス混合物でもよい)とパラホルムアルデヒドの
ディールス・ァルダー反応により、従来法に比較し簡単
に2−メチル−5,6ージヒドロピランを製造すること
に成功した。
However, the method (■) produces two types of 2-methyl-dihydropyran, which is difficult to separate and purify, and the method (@) has a low yield and is unsuitable as an industrial method. be. However, the present inventors have discovered that 2-methyl-5 is easily produced by the Diels-Alder reaction of paraformaldehyde and 1,3-pentadiene (a cis/trans mixture may be used), which is available at low cost as a petrochemical product. , 6-dihydropyran was successfully produced.

本発明は次の式{3}で示される。The present invention is represented by the following formula {3}.

すなわち、本発明は、1,3ーベンタジェンとパラホル
ムアルデヒドを反応せしめて2ーメチルー5,6ージヒ
ドロピランとなし、次いでこれをアミン中でアルカリ金
属にて還元してシス−3−へキセノールを製造する方法
である。
That is, the present invention is a method for producing cis-3-hexenol by reacting 1,3-bentadiene and paraformaldehyde to produce 2-methyl-5,6-dihydropyran, which is then reduced with an alkali metal in an amine. be.

本発明は次の如くして実施される。The present invention is carried out as follows.

1,3−ペンタジエンとパラホルムアルデドとのディー
ルス・アルダー反応は、この反応に一般に使用される条
件、例えばRoger Adamo:仇雛nicRea
ctionsVol.W,89〜90頁に記載の条件に
よって実施される。
The Diels-Alder reaction between 1,3-pentadiene and paraformalde is carried out under the conditions commonly used for this reaction, e.g.
tionsVol. W, pages 89-90.

すなわち、1,3−ペンタジヱン1モルに対しパラホル
ムアルデヒド2.0〜2.5モル、好ましくは2.3モ
ルをオートクレーフに入れ、触媒の存在又は不存在下に
100〜300ooの温度で反応させる。触媒としては
、酢酸、蟻酸、三塩化酢酸、塩化アルミニウム等の酸触
媒が挙げられ、これは1,3ーベンタジヱン1モルに対
し0.01〜0.05モル位使用するのが好ましい。ま
た加熱反応に際し、安定剤としてハイドロキノンを少量
(0.01モル/1,3−ペンタジェン1モル)加える
のが好ましい。反応時間は反応温度により調節されるが
、通常3〜5時間が好ましい。反応物は水洗後常圧で蒸
留すれば2−メチル−5,6ージヒドロピランが得られ
る。2−メチル−5,6ジヒドロピランの還元はアミン
中アルカリ金属により行われる。
That is, 2.0 to 2.5 moles, preferably 2.3 moles, of paraformaldehyde are placed in an autoclave per mole of 1,3-pentadiene, and reacted at a temperature of 100 to 300 oo in the presence or absence of a catalyst. Examples of the catalyst include acid catalysts such as acetic acid, formic acid, acetic acid trichloride, and aluminum chloride, which are preferably used in an amount of 0.01 to 0.05 mole per mole of 1,3-bentadiene. Further, during the heating reaction, it is preferable to add a small amount of hydroquinone (0.01 mol/1 mol of 1,3-pentadiene) as a stabilizer. Although the reaction time is controlled by the reaction temperature, 3 to 5 hours is usually preferred. The reaction product is washed with water and then distilled at normal pressure to obtain 2-methyl-5,6-dihydropyran. The reduction of 2-methyl-5,6 dihydropyran is carried out with an alkali metal in an amine.

アミンとしては、例えばアンモニア;メチルアミン、ジ
メチルアミン、エチルアミン、ジェチルアミン等の低級
アルキルアミン;エチレンジアミン等が挙げられるが、
特にエチルアミンが好適である。アルカリ金属としては
、例えばリチウム、ナトリウム、カリウム等が挙げられ
るが、特にリチウムが好適であり、これは2ーメチルー
5,6ージヒドロピラン1モルに対して2モル使用され
る。反応温度は−100〜50℃、特に一50〜一60
00が好ましい。反応はアルカリ金属が消失するまで行
われ、これには約2〜3時間を要する。反応後塩化アン
モニウムを加えて反応を停止させ、アミンを回収し、エ
ーテル等で抽出し、溶媒を蟹去すればシスー3ーヘキセ
/−ルが得られる。叙上の如く、本発明は石油化学製品
として安価に入手できる1,3−ペンタジェンを原料と
して2工程でシス−3−へキセノールを約40%の収率
で製造することができるので、工程が長くかつ操作が煩
雑である前記公知方法に比較し、極めて有利な方法であ
る。
Examples of amines include ammonia; lower alkylamines such as methylamine, dimethylamine, ethylamine, and diethylamine; and ethylenediamine.
Particularly suitable is ethylamine. Examples of the alkali metal include lithium, sodium, potassium, etc., but lithium is particularly preferred, and 2 moles of this are used per 1 mole of 2-methyl-5,6-dihydropyran. The reaction temperature is -100~50℃, especially -150~160℃
00 is preferred. The reaction is carried out until the alkali metal disappears, which takes about 2-3 hours. After the reaction, ammonium chloride is added to stop the reaction, the amine is recovered, extracted with ether, etc., and the solvent is removed to obtain cis-3-hexyl. As mentioned above, the present invention can produce cis-3-hexenol in two steps with a yield of about 40% using 1,3-pentadiene, which is available as a petrochemical product at low cost, as a raw material. This method is extremely advantageous compared to the known method described above, which is long and complicated to operate.

次に実施例を挙げて説明する。Next, an example will be given and explained.

実施例 1 1〆オートクレープに65%1,3ーベンタジュン(日
本ゼオン製品:シス、トランス混合物)340g、パラ
ホルムアルデヒド225g及びハイドロキノン5gを入
れ、240つ0で4時間加熱反応後冷却し、反応液は4
回水洗した。
Example 1 340 g of 65% 1,3-bentajune (Nippon Zeon product: cis, trans mixture), 225 g of paraformaldehyde, and 5 g of hydroquinone were placed in an autoclave, heated at 240° C. for 4 hours, and then cooled. 4
Washed twice with water.

無水硫酸ソーダで乾燥後常圧にて蒸留し、沸点103〜
1060の無色液体163gを得た。2−メチル−5,
6−ジヒドロピランの理論収率51.5%。
After drying with anhydrous sodium sulfate, distillation at normal pressure results in a boiling point of 103~
163 g of 1060 colorless liquid was obtained. 2-methyl-5,
Theoretical yield of 6-dihydropyran was 51.5%.

MS,IR,NMRは2−メチル−5,6−ジヒドロピ
ランの文献値と一致した。MS(m/e): 98(31.1%)M+,97(13.6%),83(
42.4%),70(3.8%),68(7.6%),
67(18.2%),55(37.9%),53(15
.9%),43(100%),42(5.3%),41
(18.2%),40(5.3%),39(10.6%
)IR(肌‐1): 3025,2970,2910,2850,1370,
1270,1190,1105,1085,1000,
890,805,770,670。
MS, IR, and NMR were consistent with literature values for 2-methyl-5,6-dihydropyran. MS (m/e): 98 (31.1%) M+, 97 (13.6%), 83 (
42.4%), 70 (3.8%), 68 (7.6%),
67 (18.2%), 55 (37.9%), 53 (15
.. 9%), 43 (100%), 42 (5.3%), 41
(18.2%), 40 (5.3%), 39 (10.6%
) IR (skin-1): 3025, 2970, 2910, 2850, 1370,
1270, 1190, 1105, 1085, 1000,
890,805,770,670.

NMR(ppm):1.13(虫日,d,6.5Hz)
,1.5〜2.5(2日,m),3.3〜4.3(祖,
m), 5.4〜5.9(2日,bm) 実施例 2 500私反応フラスコに実施例1で得た2−メチル−5
,6ージヒドロピラン20g及びエチルアミン16腿を
入れ、ドライアイスーアセトン格で−50CO以下に冷
却して、窒素気流中でリチウム2.8gを徐々に加えて
反応させた。
NMR (ppm): 1.13 (Insect day, d, 6.5Hz)
, 1.5-2.5 (2 days, m), 3.3-4.3 (so,
m), 5.4-5.9 (2 days, bm) Example 2 2-Methyl-5 obtained in Example 1 was placed in a 500 m reaction flask.
, 20 g of 6-dihydropyran and 16 g of ethylamine were added, and the mixture was cooled to -50 CO or less using dry ice-acetone, and 2.8 g of lithium was gradually added in a nitrogen stream to react.

リチウム片が完全に消失するまでに2.虫時間を要した
。その後さらに同温度で2時間反応させた後塩化アンモ
ニウム26gを加えて反応を終了せしめ、加溢してエチ
ルアミンを留去して回収し、残留物はエーテルにて抽出
し、4回水洗後無水硫酸ソーダで乾燥後常圧下に蒸留し
、沸点154〜159qoの留分17.1gを得た。シ
ス−3−へキセノールの理論収率84%。MS,IR,
NMRはシス−3−へキセノールの文献値と一致した。
MS(m/e): 100(6.2%)M、83(6.2%),82(75
%),81(9.4%),72(6.2%),70(1
6.7%),69(37.5%),68(9.4%),
67(100%),57(17.3%),56(10.
4%),55(45.8%),54(12.5%),5
3(5.6%),44(9.4%),42(28.1%
),41(78.1%)IR(肌‐1):3300,1
650,896,86熱NMR(ppm):0.96(
細,t,7HZ),1.8〜2.5(4日,m),3.
50(2日,t,7HZ), 4.05(IH,b), 5.0〜5.7(2日,m)
2. Until the lithium pieces completely disappear. It took a long time. After that, the reaction was further carried out at the same temperature for 2 hours, and then 26 g of ammonium chloride was added to terminate the reaction. Ethylamine was distilled off and recovered by overflowing. The residue was extracted with ether, washed with water four times, and then After drying with soda, it was distilled under normal pressure to obtain 17.1 g of a fraction with a boiling point of 154 to 159 qo. Theoretical yield of cis-3-hexenol 84%. M.S., I.R.,
NMR was consistent with literature values for cis-3-hexenol.
MS (m/e): 100 (6.2%) M, 83 (6.2%), 82 (75
%), 81 (9.4%), 72 (6.2%), 70 (1
6.7%), 69 (37.5%), 68 (9.4%),
67 (100%), 57 (17.3%), 56 (10.
4%), 55 (45.8%), 54 (12.5%), 5
3 (5.6%), 44 (9.4%), 42 (28.1%
), 41 (78.1%) IR (skin-1): 3300, 1
650,896,86 thermal NMR (ppm): 0.96 (
Thin, t, 7HZ), 1.8-2.5 (4 days, m), 3.
50 (2 days, t, 7HZ), 4.05 (IH, b), 5.0-5.7 (2 days, m)

Claims (1)

【特許請求の範囲】 1 2−メチル−5,6−ジヒドロピランをアミン中で
アルカリ金属にて還元することを特徴とするシス−3−
ヘキセノールの製造方法。 2 アミンがアンモニア、低級アルキルアミン又はエチ
レンジアミンである特許請求の範囲第1項記載の製造方
法。 3 アルカリ金属がリチウム、カリウム又はナトリウム
である特許請求の範囲第1項記載の製造方法。 4 1,3−ペンタジエンとパラホルムアルデヒドを反
応せしめて2−メチル−5,6−ジヒドロピランとなし
、次いでこれをアミン中でアルカリ金属にて還元するこ
とを特徴とするシス−3−ヘキセノールの製造方法。 5 アミンがアンモニア、低級アルキルアミン又はエチ
レンジアミンである特許請求の範囲第4項記載の製造方
法。 6 アルカリ金属がリチウム、カリウム又はナトリウム
である特許請求の範囲第4項記載の製造方法。
[Claims] 1. Cis-3-dihydropyran, which is characterized by reducing 2-methyl-5,6-dihydropyran with an alkali metal in an amine.
Method for producing hexenol. 2. The manufacturing method according to claim 1, wherein the amine is ammonia, lower alkylamine, or ethylenediamine. 3. The manufacturing method according to claim 1, wherein the alkali metal is lithium, potassium, or sodium. 4 Production of cis-3-hexenol characterized by reacting 1,3-pentadiene and paraformaldehyde to form 2-methyl-5,6-dihydropyran, which is then reduced with an alkali metal in an amine Method. 5. The manufacturing method according to claim 4, wherein the amine is ammonia, lower alkylamine, or ethylenediamine. 6. The manufacturing method according to claim 4, wherein the alkali metal is lithium, potassium, or sodium.
JP943479A 1979-01-30 1979-01-30 Method for producing cis-3-hexenol Expired JPS6034933B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP943479A JPS6034933B2 (en) 1979-01-30 1979-01-30 Method for producing cis-3-hexenol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP943479A JPS6034933B2 (en) 1979-01-30 1979-01-30 Method for producing cis-3-hexenol

Publications (2)

Publication Number Publication Date
JPS55102531A JPS55102531A (en) 1980-08-05
JPS6034933B2 true JPS6034933B2 (en) 1985-08-12

Family

ID=11720210

Family Applications (1)

Application Number Title Priority Date Filing Date
JP943479A Expired JPS6034933B2 (en) 1979-01-30 1979-01-30 Method for producing cis-3-hexenol

Country Status (1)

Country Link
JP (1) JPS6034933B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106631687B (en) * 2016-12-21 2019-08-30 山东新和成药业有限公司 A method of with synthesizing leaf alcohol under silane-Lewis acid catalytic systems
WO2023127533A1 (en) * 2021-12-28 2023-07-06 日本ゼオン株式会社 Production method of 2-methyl-5,6-dihydro-2h-pyran

Also Published As

Publication number Publication date
JPS55102531A (en) 1980-08-05

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