JP3635118B2 - Method for producing propargyl furyl methyl alcohol - Google Patents
Method for producing propargyl furyl methyl alcohol Download PDFInfo
- Publication number
- JP3635118B2 JP3635118B2 JP34109194A JP34109194A JP3635118B2 JP 3635118 B2 JP3635118 B2 JP 3635118B2 JP 34109194 A JP34109194 A JP 34109194A JP 34109194 A JP34109194 A JP 34109194A JP 3635118 B2 JP3635118 B2 JP 3635118B2
- Authority
- JP
- Japan
- Prior art keywords
- group
- propargylfurylmethyl
- alcohol
- hydrogen atom
- general formula
- 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 - Lifetime
Links
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
Landscapes
- Furan Compounds (AREA)
Description
【0001】
【産業上の利用分野】
本発明は、5−プロパルギルフリルメチルアルコールの有用な製造方法に関するものである。
【0002】
【従来の技術】
次式VI
【化6】
で表わされる5−プロパルギル−2−フリルメチル 2、2、3、3−テトラメチルシクロプロパンカルボキシレート(以降化合物Aと称す)や、次式VII
【化7】
で表わされる5−プロパルギル−2−メチル−3−フリルメチル 2、2、3、3−テトラメチルシクロプロパンカルボキシレート(以降化合物Bと称す)などの5−プロパルギルフリルメチルアルコールエステル類は、高い殺虫、防虫活性と、人畜に対する安全性を兼備した有用な殺虫、防虫成分である。これらのエステル類を合成するに際し、5−プロパルギルフリルメチルアルコールは重要な中間体化合物であり、これまでいくつかの合成法が報告されてきた。
【0003】
例えば、”防虫科学 第35巻 第87〜91頁”には一般式IVの化合物に金属マグネシウムとプロパルギルブロマイドを用いる、いわゆるグリニヤル反応によってプロパルギル基を導入する合成法が報告されている。
また、特公昭48−11935号公報には、次式VIII
【化8】
の化合物に、金属マグネシウムとアセチレンブロマイドを反応させる方法が開示されている。
いずれもグリニヤルカップリング法と呼ばれる方法で、プロパルギル基の導入手段としてはよく用いられるものであるが、フリルメチルアルコールに適用した場合収率は極めて低く、実用的な合成法とはいえないものであった。
【0004】
【発明が解決しようとする課題】
本発明は、有用な殺虫、防虫成分、5−プロパルギルフリルメチルアルコールエステル類(化合物Aや化合物Bなど)の中間体である5−プロパルギルフリルメチルアルコールを効率よく安価に製造しえる方法を提供することを目的とする。
【0005】
【課題を解決するための手段】
上記目的達成のため、請求項1の発明は、一般式II
【化9】
(式中、R1は水素原子、又はメチル基を表わし、R2は低級アルキル基を表わす。)で表わされる化合物から、一般式I
【化10】
(式中、R1は水素原子、又はメチル基を表わす。)で表わされる5−プロパルギルフリルメチルアルコールを製造するにあたり、一般式IV
【化11】
(式中、R1は水素原子、又はメチル基を表わし、R3は水酸基の保護基を示す。)で表される化合物に、アルキルリチウムの存在下でプロパルギルクロライドを反応させ、一般式V
【化12】
(式中、R1は水素原子、又はメチル基を表わし、R3は水酸基の保護基を示す。)で表される化合物に導く工程を含む製造方法に係る。
なお、R2としては炭素数が1〜4のアルキル基があげられるが、通常エチル基が一般的である。また、R3としてはテトラヒドロピラニル基やアセタール基などがあげられる。
【0006】
請求項2の発明は、請求項1の発明において、一般式IVの水酸基の保護基としてテトラヒドロピラニル基を用いたものである。
【0007】
請求項3の発明は、請求項1又は請求項2の発明において、一般式IVから一般式Vを導く反応に際し、アルキルリチウムとしてn−ブチルリチウムを用いたものである。
【0008】
【作用】
請求項1の発明によれば、以下に示す合成ルート
【化13】
に従って効率よく、しかも安価に5−プロパルギルフリルメチルアルコールを製造することができる。
特に、一般式IVの化合物に、アルキルリチウムの存在下でプロパルギルクロライドを反応させる本発明の一般式Vの製造方法は、従来のグリヤニル反応に比べて収率が著しく改善され、副生物もわずかである。これは、フリルメチルアルコール系化合物に特有の現象で、グリニヤル反応の適用が非効率なこの分野で格別実用性が高い。
【0009】
反応は、アルキルリチウムの例えばn−ヘキサン溶液を窒素雰囲気下で−50℃〜−70℃に冷却し、これに一般式IVの化合物の例えば乾燥エーテル溶液を滴下させてリチウム試薬を調製したのち、プロパルギルクロライド溶液を加えて行われる。プロパルギルブロマイド溶液では反応性が高すぎて収率が悪い。
【0010】
請求項2の発明によれば、一般式IVの水酸基の保護基として本発明製造方法に好適なテトラヒドロピラニル基を用いたので効率がよい。
【0011】
請求項3の発明によれば、アルキルリチウムとして安価で反応性にすぐれたn−ブチルリチウムを用いたので特に有用である。
【0012】
次に本発明の製造方法がすぐれたものであることを示すために合成実施例を示す。なお、一般式IIから一般式IVの合成は”防虫科学 第35巻 第87〜91頁”に記載の方法によった。
【0013】
【合成実施例】
5−ブロモ−2−メチル−3−フリルメチルテトラヒドロピラニルエーテルから5−プロパルギル−2−メチル−3−フリルメチルアルコールの合成
1.6Mブチルリチウムのヘキサン溶液2.5ml(4mmol)を窒素雰囲気下−78℃に冷却し、攪拌しながら5−ブロモ−2−メチル−3−フリルメチルテトラヒドロピラニルエーテル1g(3.64mmol)の乾燥エーテル溶液10mlを滴下し、滴下終了後−78℃で30分間攪拌してリチウム試薬を調製した。次いで、−78℃でこれに、プロパルギルクロライド0.37g(5mmol)を含むエーテル溶液20mlを滴下し、滴下終了後更に同温度で30分間攪拌を継続した。
反応液に飽和NaHPO4溶液を注加し、エーテル層を分液後、水層はエーテルで抽出して最初のエーテル層にあわせた。無水硫酸ナトリウムで乾燥し、エーテルを留去したのち、これに10%稀硫酸0.5ml、エタノール5mlからなる溶液を注入し、室温で5時間攪拌した。反応液に炭酸カリウム溶液を加えて中和し、エタノールを留去後エーテルを加えた。エーテル層を冷飽和重曹液、水、飽和食塩水で順次洗浄後無水硫酸ナトリウムで乾燥した。エーテルを留去したのち残留物を減圧下に蒸留して無色透明油状の 5−プロパルギル−2−メチル−3−フリルメチルアルコール0.44g(収率80%)を得た。
沸点; 112−116℃/0.5mmHg
NMR(ppm)CD Cl3、TMS、400MHz;2.27(S,3H,フラン環 2−CH 3 )
3.53(d,2H,≡C−CH 2 − )、4.45(d,2H,HO−CH 2−)
6.18(S,1H, フラン環 4−H)
なお、従来のグリニヤル反応による場合、収率は24%であった。
また、5−プロパルギル−2−フリルメチルアルコールについても同様に収率よく合成することができた。
【0014】
【発明の効果】
請求項1ないし請求項3の発明は、化合物Aや化合物Bなどの有用な殺虫、防虫成分の中間体である5−プロパルギルフリルメチルアルコールの極めて効率的、かつ経済的な製造方法を提供する。[0001]
[Industrial application fields]
The present invention relates to a useful process for producing 5-propargylfurylmethyl alcohol.
[0002]
[Prior art]
Formula VI
[Chemical 6]
5-propargyl-2-furylmethyl 2, 2, 3, 3-tetramethylcyclopropanecarboxylate (hereinafter referred to as Compound A) represented by the following formula VII
[Chemical 7]
5-propargylfurylmethyl alcohol esters such as 5-propargyl-2-methyl-3-furylmethyl 2,2,3,3-tetramethylcyclopropanecarboxylate (hereinafter referred to as Compound B) are highly insecticidal. It is a useful insecticidal and insect repellent component that has both insect repellent activity and safety for human animals. In synthesizing these esters, 5-propargylfurylmethyl alcohol is an important intermediate compound, and several synthetic methods have been reported so far.
[0003]
For example, “Insecticide Science Vol. 35, pages 87-91” reports a synthesis method in which a propargyl group is introduced by a so-called Grignard reaction using magnesium metal and propargyl bromide as a compound of general formula IV.
Japanese Patent Publication No. 48-11935 discloses the following formula VIII:
[Chemical 8]
A method of reacting metallic magnesium with acetylene bromide is disclosed.
Both methods are called Grignard coupling methods and are often used as a means of introducing propargyl groups. However, when applied to furylmethyl alcohol, the yield is extremely low and cannot be said to be a practical synthesis method. Met.
[0004]
[Problems to be solved by the invention]
The present invention provides a method capable of efficiently and inexpensively producing 5-propargylfurylmethyl alcohol, which is an intermediate of useful insecticidal and insecticidal components, and 5-propargylfurylmethyl alcohol esters (compound A, compound B, etc.). For the purpose.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is a general formula II.
[Chemical 9]
(Wherein, R 1 represents a hydrogen atom or a methyl group, and R 2 represents a lower alkyl group).
[Chemical Formula 10]
(In the formula, R 1 represents a hydrogen atom or a methyl group.) In producing 5-propargylfurylmethyl alcohol represented by general formula IV
Embedded image
(Wherein R 1 represents a hydrogen atom or a methyl group, and R 3 represents a hydroxyl-protecting group) and propargyl chloride is reacted in the presence of alkyllithium to give a compound represented by the general formula V
Embedded image
(In the formula, R 1 represents a hydrogen atom or a methyl group, and R 3 represents a hydroxyl-protecting group).
R 2 includes an alkyl group having 1 to 4 carbon atoms, and usually an ethyl group. Examples of R 3 include a tetrahydropyranyl group and an acetal group.
[0006]
The invention of claim 2 is the invention of claim 1, wherein a tetrahydropyranyl group is used as a protecting group for the hydroxyl group of the general formula IV.
[0007]
The invention of claim 3 uses n-butyllithium as the alkyllithium in the invention of claim 1 or claim 2 in the reaction for deriving the general formula V from the general formula IV.
[0008]
[Action]
According to the invention of claim 1, the following synthetic route
Accordingly, 5-propargylfurylmethyl alcohol can be produced efficiently and inexpensively.
In particular, the production method of the general formula V of the present invention in which the compound of the general formula IV is reacted with propargyl chloride in the presence of alkyl lithium has a significantly improved yield and a small amount of by-products compared to the conventional glycanyl reaction. is there. This is a phenomenon peculiar to a furylmethyl alcohol compound, and is highly practical in this field where application of the Grignard reaction is inefficient.
[0009]
In the reaction, for example, an n-hexane solution of alkyl lithium is cooled to −50 ° C. to −70 ° C. under a nitrogen atmosphere, and a lithium ether solution of a compound of the general formula IV is added dropwise thereto, for example, and then a lithium reagent is prepared. Propergyl chloride solution is added. Propargyl bromide solution is too reactive and yields poor.
[0010]
According to invention of Claim 2, since the tetrahydropyranyl group suitable for this invention manufacturing method was used as a hydroxyl-protecting group of general formula IV, it is efficient.
[0011]
The invention of claim 3 is particularly useful because n-butyllithium, which is inexpensive and excellent in reactivity, is used as the alkyllithium.
[0012]
Next, synthesis examples are shown to show that the production method of the present invention is excellent. In addition, the synthesis | combination of general formula IV from general formula II was based on the method as described in "Insect repellent science 35th volume 87-91 pages."
[0013]
[Synthesis Examples]
Synthesis of 5-propargyl-2-methyl-3-furylmethyl alcohol from 5-bromo-2-methyl-3-furylmethyltetrahydropyranyl ether 2.5 ml (4 mmol) of a 1.6M butyllithium hexane solution in a nitrogen atmosphere Cool to 78 ° C., add dropwise 10 ml of a dry ether solution of 1 g (3.64 mmol) of 5-bromo-2-methyl-3-furylmethyltetrahydropyranyl ether with stirring, and stir at −78 ° C. for 30 minutes after completion of the dropwise addition. A lithium reagent was prepared. Next, 20 ml of an ether solution containing 0.37 g (5 mmol) of propargyl chloride was added dropwise thereto at −78 ° C., and stirring was continued for 30 minutes at the same temperature after completion of the dropwise addition.
Saturated NaHPO 4 solution was poured into the reaction solution, the ether layer was separated, and the aqueous layer was extracted with ether and combined with the first ether layer. After drying over anhydrous sodium sulfate and distilling off ether, a solution consisting of 0.5 ml of 10% dilute sulfuric acid and 5 ml of ethanol was poured into the solution and stirred at room temperature for 5 hours. The reaction solution was neutralized by adding a potassium carbonate solution, ethanol was distilled off, and ether was added. The ether layer was washed successively with cold saturated sodium bicarbonate solution, water and saturated brine, and then dried over anhydrous sodium sulfate. After the ether was distilled off, the residue was distilled under reduced pressure to obtain 0.44 g (yield 80%) of 5-propargyl-2-methyl-3-furylmethyl alcohol as a colorless transparent oil.
Boiling point: 112-116 ° C / 0.5mmHg
NMR (ppm) CDCl 3 , TMS, 400 MHz; 2.27 (S, 3H, furan ring 2-C H 3 )
3.53 (d, 2H, ≡ C—C H 2 −), 4.45 (d, 2H, HO— CH 2 —)
6.18 (S, 1H, furan ring 4- H )
In the case of the conventional Grignard reaction, the yield was 24%.
Similarly, 5-propargyl-2-furylmethyl alcohol could be synthesized with good yield.
[0014]
【The invention's effect】
The inventions of claims 1 to 3 provide an extremely efficient and economical method for producing 5-propargylfurylmethyl alcohol which is an intermediate of useful insecticidal and insecticidal components such as compound A and compound B.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34109194A JP3635118B2 (en) | 1994-12-29 | 1994-12-29 | Method for producing propargyl furyl methyl alcohol |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34109194A JP3635118B2 (en) | 1994-12-29 | 1994-12-29 | Method for producing propargyl furyl methyl alcohol |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08188576A JPH08188576A (en) | 1996-07-23 |
JP3635118B2 true JP3635118B2 (en) | 2005-04-06 |
Family
ID=18343179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP34109194A Expired - Lifetime JP3635118B2 (en) | 1994-12-29 | 1994-12-29 | Method for producing propargyl furyl methyl alcohol |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3635118B2 (en) |
-
1994
- 1994-12-29 JP JP34109194A patent/JP3635118B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH08188576A (en) | 1996-07-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Yamamoto et al. | Lewis acid mediated reactions of organocopper reagents. Entrainment in the conjugate addition to. alpha.,. beta.-unsaturated ketones, esters, and acids via the RCu. cntdot. BF3 system | |
JP2618220B2 (en) | Method for producing intermediate for pesticide production | |
EP2639217B1 (en) | Methods for preparing 5-Acetoxy-(E3)-3-pentenyl methoxymethyl ether and an (E3)-3-alkenyl acetate | |
JP3575705B2 (en) | Method for producing gingerol and shogaol | |
JP3635118B2 (en) | Method for producing propargyl furyl methyl alcohol | |
US4233231A (en) | Novel vinyl-stannyl derivatives | |
US3985813A (en) | Unsaturated alcohols | |
US3943157A (en) | Synthesis of codling moth attractant | |
JPH1059980A (en) | Production of 5-bromo-2-fluorobenzeneboric acid | |
JP2759348B2 (en) | Method for producing 2-alkyl-3-alkoxycarbonylmethylcyclopentanone | |
JPH0696564B2 (en) | α- (ω-hydroxyalkyl) furfuryl alcohol and process for producing the same | |
US4014946A (en) | Synthesis of 1-bromonon-4-en-6-yne | |
EP0154894B1 (en) | A sulfur-containing fluorinated unsaturated compound and its manufacturing process | |
JPH10101614A (en) | Production of alpha alpha-difluoro-beta-hydroxy ester | |
JP2002308864A (en) | Production method for 5-propargylfurfuryl alcohol | |
US3994896A (en) | Sulfonate esters of non-4-en-6-yn-1-ol | |
JPH0558638B2 (en) | ||
KR100395231B1 (en) | Novel process for preparing methyl 7-(3-hydroxy-5-oxo-1-cyclopenten-1-yl)heptanoate | |
JP3825489B2 (en) | Unsaturated halogen compound and method for producing sex pheromone using the same | |
JP2730925B2 (en) | 1,9-Non-2-enediol and derivatives thereof, methods for producing them, and methods for producing physiologically effective compounds using the compounds | |
JP2000212125A (en) | Production of fluorine-containing carboxylic acid derivative | |
JPH0528214B2 (en) | ||
US20230148099A1 (en) | Process for preparing 6-isopropenyl-3-methyl-9-decenyl acetate and intermediates thereof | |
JPH0232266B2 (en) | 22 * 44ETOKISHIFUENIRU ** 2MECHIRUPUROPIRUARUKOORUOYOBISONOSEIZOHO | |
JPH0525089A (en) | Production of 2-hydroxy acid derivative |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20041216 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20041228 |
|
R150 | Certificate of patent (=grant) or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080107 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090107 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100107 Year of fee payment: 5 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110107 Year of fee payment: 6 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110107 Year of fee payment: 6 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120107 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130107 Year of fee payment: 8 |
|
EXPY | Cancellation because of completion of term |