JP2586950B2 - Process for producing p- or m-tert-butoxybenzaldehyde - Google Patents

Process for producing p- or m-tert-butoxybenzaldehyde

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Publication number
JP2586950B2
JP2586950B2 JP18476689A JP18476689A JP2586950B2 JP 2586950 B2 JP2586950 B2 JP 2586950B2 JP 18476689 A JP18476689 A JP 18476689A JP 18476689 A JP18476689 A JP 18476689A JP 2586950 B2 JP2586950 B2 JP 2586950B2
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JP
Japan
Prior art keywords
tert
butoxybenzaldehyde
formula
added
hydroxybenzaldehyde
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.)
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JP18476689A
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Japanese (ja)
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JPH0352839A (en
Inventor
幸隆 内堀
正行 梅野
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Hokko Chemical Industry Co Ltd
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Hokko Chemical Industry Co Ltd
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Description

【発明の詳細な説明】 イ)発明の目的 (産業上の利用分野) 本発明は、農医薬の中間体として幅広い用途を有する
ヒドロキシベンズアルデヒドの前駆体として有用なp−
又はm−tert−ブトキシベンズアルデヒドの新規な製造
法に関する。
DETAILED DESCRIPTION OF THE INVENTION a) Object of the Invention (Industrial application field) The present invention relates to a p-type compound useful as a precursor of hydroxybenzaldehyde, which has a wide range of uses as an intermediate of agrochemicals.
Or a novel method for producing m-tert-butoxybenzaldehyde.

(従来の技術) ブトキシベンズアルデヒドの異性体の製造方法につい
てはいくつか知られている。例えば、o−tert−ブトキ
シベンズアルデヒドは、三フッ化ホウ素を酸触媒として
o−ヒドロキシベンズアルデヒドとイソブテンの反応に
より得られる(米国特許第3068265号明細書)。しかし
ながら、この製法では酸触媒として三フッ化ホウ素を用
いるため、目的物の収率は低い。
(Prior Art) Several methods for producing isomers of butoxybenzaldehyde are known. For example, o-tert-butoxybenzaldehyde is obtained by reacting o-hydroxybenzaldehyde with isobutene using boron trifluoride as an acid catalyst (US Pat. No. 3,068,265). However, in this method, the yield of the target product is low because boron trifluoride is used as the acid catalyst.

また、m−tert−ブトキシベンズアルデヒドについて
は、ケミカル アブストラクト 第88巻6061に記載され
ているが、その製法については開示されていない。
Further, m-tert-butoxybenzaldehyde is described in Chemical Abstracts Vol. 88, 6061, but its production method is not disclosed.

さらに、p−tert−ブトキシベンズアルデヒドは、p
−tert−ブトキシトルエンをメタノールの存在下で電気
的に酸化してp−tert−ブトキシベンズアルデヒド−ジ
メチルアセタールとし、これを加水分解して得られる
(特開昭56−36426号公報)。
Furthermore, p-tert-butoxybenzaldehyde is p-tert-butoxybenzaldehyde
-Tert-butoxytoluene is electrically oxidized in the presence of methanol to give p-tert-butoxybenzaldehyde-dimethylacetal, which is obtained by hydrolysis (JP-A-56-36426).

一方、グリニヤール試薬を用いて種々のアルデヒドを
得る方法について知られている〔新実験化学講座14 有
機化合物の合成と反応II 第719頁〜第723頁(1977年)
日本化学会編 丸善発行〕。これによれば、例えばp
−ブロモトルエンのグリニヤール試薬とオルトギ酢酸エ
ステルとの反応によりp−トルアルデヒドが得られるこ
と、グリニヤール試薬にN−メチルホルムアニリドを
反応させ、加水分解をしてアルデヒドが得られること、
5−ブロモプソイドクメンのグリニヤール試薬にエト
キシメチレンアニリンを反応させて2,4,5−トリメチル
ベンズアルデヒドが得られること、がそれぞれ記載され
ている。しかしながら、これまでグリニヤール反応を用
いたp−又はm−tert−ブトキシベンズアルデヒドの製
造法については知られていない。
On the other hand, a method for obtaining various aldehydes using a Grignard reagent is known [New Experimental Chemistry Lecture 14 Synthesis and Reaction of Organic Compounds II pp. 719-723 (1977)]
The Chemical Society of Japan, published by Maruzen]. According to this, for example, p
-P-tolualdehyde is obtained by the reaction of a Grignard reagent of bromotoluene and orthogiacetic acid ester, N-methylformanilide is reacted with the Grignard reagent, and the aldehyde is obtained by hydrolysis,
It is described that 2,4,5-trimethylbenzaldehyde is obtained by reacting ethoxymethyleneaniline with a Grignard reagent of 5-bromopsoid cumene. However, there is no known method for producing p- or m-tert-butoxybenzaldehyde using the Grignard reaction.

(発明が解決しようとする課題) ブトキシベンズアルデヒドの合成法は前記したように
種々の方法が提案されているが、工業的規模で実施する
には操作性や経済性に難点がある。したがって、これら
に代わる有効なp−又はm−tert−ブトキシベンズアル
デヒドの製造法の開発が望まれている。
(Problems to be Solved by the Invention) As described above, various methods for synthesizing butoxybenzaldehyde have been proposed, but there are difficulties in operability and economical efficiency when implemented on an industrial scale. Therefore, it is desired to develop an effective method for producing p- or m-tert-butoxybenzaldehyde instead of these.

本発明は、工業的に容易な操作で目的とするp−又は
m−tert−ブトキシベンズアルデヒドを高純度、高収率
で得る製造法を提供することにある。
An object of the present invention is to provide a method for producing the desired p- or m-tert-butoxybenzaldehyde with high purity and high yield by industrially easy operation.

ロ)発明の構成 課題を解決するための手段 本発明者らは、かかる問題点を解決すべく鋭意検討を
重ねた。その結果、工業的に極めて有利なp−又はm−
tert−ブトキシベンズアルデヒドの製造法を見出すに至
った。
B) Configuration of the Invention Means for Solving the Problems The present inventors have conducted intensive studies to solve such problems. As a result, p- or m-
A method for producing tert-butoxybenzaldehyde has been found.

すなわち、本発明の要旨とするところは、 一般式 (式中、Xはハロゲン原子を示す。)で表わされるp−
又はm−tert−ブトキシフェニルマグネシウムハライド
と、 式 (CH32NCHO (II) で表わされるジメチルホルムアミドを反応させ、得られ
た生成物に鉱酸水又は飽和の塩化アンモニウム水を加え
ることを特徴とする 一般式 で表わされるp−又はm−tert−ブトキシベンズアルデ
ヒドの製造法に関する。
That is, the gist of the present invention is the general formula (In the formula, X represents a halogen atom.)
Alternatively, m-tert-butoxyphenyl magnesium halide is reacted with dimethylformamide represented by the formula (CH 3 ) 2 NCHO (II), and a mineral acid solution or a saturated ammonium chloride solution is added to the obtained product. General formula And a process for producing p- or m-tert-butoxybenzaldehyde.

次に本発明におけるp−又はm−tert−ブトキシベン
ズアルデヒドの合成経路を示す。
Next, a synthesis route of p- or m-tert-butoxybenzaldehyde in the present invention will be described.

(式中、Xはハロゲン原子を示す。) 以下、本発明の合成法について具体的に説明する。 (In the formula, X represents a halogen atom.) Hereinafter, the synthesis method of the present invention will be specifically described.

まず、本発明の式(I)化合物の合成原料であるグリ
ニヤール試薬の式(III)化合物は公知の化合物であ
り、公知の方法により得るか、または市販品を用いれば
よい。
First, the compound of the formula (III) of the Grignard reagent, which is a raw material for synthesizing the compound of the formula (I) of the present invention, is a known compound and may be obtained by a known method or a commercially available product.

式(III)化合物のXはハロゲン原子であり、好まし
くは、塩素、ヨウ素、臭素などが挙げられる。この式
(III)化合物の溶液中に式(II)化合物を滴下し、1
〜2時間撹拌する。この反応で用いる溶媒としてはテト
ラヒドロフランの単独あるいはこれとベンゼン、トルエ
ン、キシレンなどの芳香族炭化水素溶媒との混合系、ま
たジエチルエーテル、ジブチルエーテル、ジグライムな
どがあげられる。反応温度は10〜40℃が好ましい。
X in the compound of the formula (III) is a halogen atom, preferably, chlorine, iodine, bromine and the like. The compound of the formula (II) is dropped into the solution of the compound of the formula (III), and 1
Stir for ~ 2 hours. Examples of the solvent used in this reaction include tetrahydrofuran alone or a mixture thereof with an aromatic hydrocarbon solvent such as benzene, toluene and xylene, and diethyl ether, dibutyl ether and diglyme. The reaction temperature is preferably from 10 to 40 ° C.

反応終了後は、反応液に5〜10%の希硫酸や希塩酸な
どの鉱酸水又は飽和の塩化アンモニウム水を加え、10〜
30℃の温度で加水分解すると式(I)のp−又はm−te
rt−ブトキシベンズアルデヒドが生成する。さらに式
(I)化合物を含む有機層を分取し、溶媒を留去して残
留物を減圧蒸留すると、高純度の式(I)化合物を得る
ことができる。
After the completion of the reaction, 5 to 10% of a mineral acid aqueous solution such as dilute sulfuric acid or dilute hydrochloric acid or saturated aqueous ammonium chloride solution is added to the reaction solution, and 10 to 10% is added.
Hydrolysis at a temperature of 30 ° C. gives p- or m-te of formula (I)
rt-Butoxybenzaldehyde is produced. Further, the organic layer containing the compound of the formula (I) is separated, the solvent is distilled off, and the residue is distilled under reduced pressure, whereby a highly pure compound of the formula (I) can be obtained.

上記した式(I)化合物の合成法は実施例1〜2に示
した。
The methods for synthesizing the compound of formula (I) described above are shown in Examples 1 and 2.

こうして得た式(I)化合物は、後記の参考製造例1
〜6に示すごとく脱tert−ブチル化剤を反応させるか、
もしくは脱tert−ブチル化触媒を添加して、減圧下で副
生したイソブチレンを反応系外に留去させることによ
り、農医薬の中間体として有用なp−又はm−ヒドロキ
シベンズアルデヒドを得ることができる。
The compound of formula (I) thus obtained was prepared according to Reference Production Example 1 described below.
Reacting the tert-butylating agent as shown in
Alternatively, a p- or m-hydroxybenzaldehyde useful as an intermediate for agrochemicals can be obtained by adding a detert-butylation catalyst and distilling off by-produced isobutylene under reduced pressure out of the reaction system. .

次に本発明の実施例を示して本発明の合成法を具体的
に説明する。
Next, the synthesis method of the present invention will be specifically described with reference to examples of the present invention.

実施例1 p−tert−ブトキシベンズアルデヒドの合成 500ml容量の4口フラスコに撹拌器と還流冷却器をと
りつけ、これにp−tert−ブトキシベンズクロライド9
2.3g(0.50モル)、金属マグネシウム片18.2gと無水テ
トラヒドロフラン200mlを加えて反応させ、p−tert−
ブトキシフェニルマグネシウムクロライドの溶液(0.50
モル)を調製する。ここにジメチルホルムアミド36.5g
(0.50モル)を35℃の温度に保ちながら滴下し、さら
に、1時間撹拌を続けた。反応終了後、この反応液を室
温まで冷却し、飽和の塩化アンモニウム水400mlを加え
て加水分解する。その後、有機層を分取し、この有機層
を濃縮し、減圧蒸留するとp−tert−ブトキシベンズア
ルデヒドが82.9g(ガスクロマトグラフィー純度100%、
収率93.0%)が得られた。
Example 1 Synthesis of p-tert-butoxybenzaldehyde A 500 ml four-necked flask was equipped with a stirrer and a reflux condenser, and p-tert-butoxybenzchloride 9 was added thereto.
2.3 g (0.50 mol), 18.2 g of a piece of magnesium metal and 200 ml of anhydrous tetrahydrofuran were added and reacted, and p-tert-
Butoxyphenyl magnesium chloride solution (0.50
Mol) is prepared. Here 36.5 g of dimethylformamide
(0.50 mol) was added dropwise while maintaining the temperature at 35 ° C., and stirring was further continued for 1 hour. After completion of the reaction, the reaction solution is cooled to room temperature, and 400 ml of saturated aqueous ammonium chloride is added to hydrolyze. Thereafter, the organic layer was separated, and the organic layer was concentrated and distilled under reduced pressure to obtain 82.9 g of p-tert-butoxybenzaldehyde (purity of gas chromatography 100%,
Yield 93.0%).

このものの元素分析値および物性値は以下のとおりで
あった。
Its elemental analysis values and physical properties were as follows.

(1)元素分析値 C11H14O2として 理論値 C%=74.12 H%=7.93 実測値 C%=74.53 H%=7.95 (2)沸点 92℃/2mmHg (3)IRスペクトル (NaCl)cm-1 2970,2930,2815,2720,1670,1570,1365,890,830,620 (4)NMRスペクトル(CDCl3)δ 1.25(9H,S),6.93(2H,d,J=6Hz) 7.61(2H,d,J=6Hz),9.72(1H,S) 実施例2 m−tert−ブトキシベンズアルデヒドの合成 500ml容量の4口フラスコに撹拌器と還流冷却器をと
りつけ、これにm−tert−ブトキシベンズブロマイド11
4.6g(0.5モル)を加え、製造例1と同様の操作を行
い、m−tert−ブトキシベンズアルデヒド 76.8g(ガ
スクロマトグラフィー純度100%、収率86.2%)が得ら
れた。
(1) Elemental analysis value C 11 H 14 O 2 Theoretical value C% = 74.12 H% = 7.93 Actual value C% = 74.53 H% = 7.95 (2) Boiling point 92 ° C / 2mmHg (3) IR spectrum (NaCl) cm -1 2970,2930,2815,2720,1670,1570,1365,890,830,620 (4) NMR spectrum (CDCl 3 ) δ 1.25 (9H, S), 6.93 (2H, d, J = 6Hz) 7.61 (2H, d, J = 6 Hz), 9.72 (1H, S) Example 2 Synthesis of m-tert-butoxybenzaldehyde A 500-ml four-necked flask was equipped with a stirrer and a reflux condenser, and m-tert-butoxybenzbromide 11 was added thereto.
4.6 g (0.5 mol) was added, and the same operation as in Production Example 1 was carried out to obtain 76.8 g of m-tert-butoxybenzaldehyde (purity of gas chromatography: 100%, yield: 86.2%).

このものの分析値および物性値は以下のとおりであっ
た。
Its analysis values and physical properties were as follows.

(1)元素分析値 C11H14O2として 理論値 C%=74.12 H%=7.93 実測値 C%=74.10 H%=7.90 (2)沸点 91℃/3mmHg (3)IRスペクトル (NaCl)cm-1 2970,2925,1650,1575,1250,1160,850,780,680 (4)NMRスペクトル(CDCl3)δ 1.28(9H,S),7.00〜7.44(4H,m) 9.76(1H,S) 次にp−又はm−ヒドロキシベンズアルデヒドの参考
製造例を示す。
(1) Elemental analysis value C 11 H 14 O 2 Theoretical value C% = 74.12 H% = 7.93 Actual value C% = 74.10 H% = 7.90 (2) Boiling point 91 ° C./3 mmHg (3) IR spectrum (NaCl) cm -1 2970,2925,1650,1575,1250,1160,850,780,680 (4) NMR spectrum (CDCl 3 ) δ 1.28 (9H, S), 7.00 to 7.44 (4H, m) 9.76 (1H, S) Then p- Or a reference production example of m-hydroxybenzaldehyde is shown.

参考製造例1 p−ヒドロキシベンズアルデヒドの合成
(脱tert−ブチル化剤として塩酸水を使用) 300ml容量の4口フラスコに撹拌器と還流冷却器をと
りつけ、これにp−tert−ブトキシベンズアルデヒド4
4.6g(0.25モル)と35%の塩酸水52.1g(0.50モル)を
加え、混合して室温で1時間撹拌すると白色の結晶が析
出した。この結果をクロロホルムで溶解後、抽出して水
層を取り除いた。さらに、有機層を2%の炭酸ナトリウ
ム水溶液(50ml)で洗浄した後、濃縮することにより、
p−ヒドロキシベンズアルデヒド 30.2g(ガスクロマ
トグラフィー純度100%、収率99.0%)が得られた。こ
のものの融点は116〜117℃であり、標品の融点と一致し
た。
Reference Production Example 1 Synthesis of p-hydroxybenzaldehyde (using hydrochloric acid water as a tert-butylating agent) A stirrer and a reflux condenser were attached to a 300 ml four-necked flask, and p-tert-butoxybenzaldehyde 4 was added thereto.
4.6 g (0.25 mol) and 52.1 g (0.50 mol) of 35% aqueous hydrochloric acid were added, mixed and stirred at room temperature for 1 hour to precipitate white crystals. After dissolving this result with chloroform, the aqueous layer was removed by extraction. Further, the organic layer was washed with a 2% aqueous sodium carbonate solution (50 ml), and then concentrated, whereby
30.2 g of p-hydroxybenzaldehyde (gas chromatography purity 100%, yield 99.0%) was obtained. Its melting point was 116 to 117 ° C., which was consistent with the melting point of the standard.

参考製造例2 m−ヒドロキシベンズアルデヒドの合成
(脱tert−ブチル化剤として塩酸水を使用) 300ml容量の4口フラスコに撹拌器と還流冷却器をと
りつけ、これにm−tert−ブトキシベンズアルデヒド4
4.6g(0.25モル)と35%の塩酸水65.2g(0.625モル)を
加え、混合して室温で1時間30分撹拌すると白色の結晶
が析出した。その後、参考製造例1と同様の操作を行
い、m−ヒドロキシベンズアルデヒド30.1g(ガスクロ
マトグラフィー純度100%、収率98.6%)が得られた。
このものの融点は103〜104℃であり、標品の融点と一致
した。
Reference Production Example 2 Synthesis of m-hydroxybenzaldehyde (using hydrochloric acid water as a tert-butylating agent) A stirrer and a reflux condenser were attached to a 300 ml capacity four-necked flask, and m-tert-butoxybenzaldehyde 4 was added thereto.
4.6 g (0.25 mol) and 65.2 g (0.625 mol) of 35% aqueous hydrochloric acid were added, mixed, and stirred at room temperature for 1 hour and 30 minutes to precipitate white crystals. Thereafter, the same operation as in Reference Production Example 1 was performed to obtain 30.1 g of m-hydroxybenzaldehyde (gas chromatography purity: 100%, yield: 98.6%).
The melting point of this product was 103 to 104 ° C, which coincided with the melting point of the standard.

参考製造例3 p−ヒドロキシベンズアルデヒドの合成
(脱tert−ブチル化剤として硫酸水を使用) 500ml容量の4口フラスコに撹拌器と還流冷却器をと
りつけ、これにp−tert−ブトキシベンズアルデヒド8
2.9g(0.465モル)と40%の硫酸水200g(0.816モル)を
加え、混合して室温で1時間撹拌すると、白色の結晶が
析出した。この結晶をジクロロメタン液で溶解後、抽出
して水層を取り除いた。さらに、有機層を2%の炭酸ナ
トリウム水溶液(100ml)で洗浄した後、濃縮すること
により、p−ヒドロキシベンズアルデヒド55.8g(ガス
クロマトグラフィー純度100%、収率98.3%)が得られ
た。このものの融点は116〜117℃であった。
Reference Production Example 3 Synthesis of p-hydroxybenzaldehyde (using sulfuric acid as a tert-butylating agent) A 500 ml four-necked flask was equipped with a stirrer and a reflux condenser, and p-tert-butoxybenzaldehyde 8 was added thereto.
When 2.9 g (0.465 mol) and 200 g (0.816 mol) of 40% aqueous sulfuric acid were added, mixed and stirred at room temperature for 1 hour, white crystals were precipitated. The crystals were dissolved in a dichloromethane solution and extracted to remove an aqueous layer. Further, the organic layer was washed with a 2% aqueous sodium carbonate solution (100 ml) and then concentrated to obtain 55.8 g of p-hydroxybenzaldehyde (purity of gas chromatography 100%, yield 98.3%). Its melting point was 116-117 ° C.

参考製造例4 m−ヒドロキシベンズアルデヒドの合成
(脱tert−ブチル化剤として硫酸水を使用) 500ml容量の4口フラスコに撹拌器と還流冷却器をと
りつけ、これにm−tert−ブトキシベンズアルデヒド7
6.8g(0.431モル)と50%の硫酸水145g(0.740モル)を
加え、室温で1時間撹拌すると白色の結晶が析出した。
その後、参考製造例1と同様の操作を行い、m−ヒドロ
キシベンズアルデヒド51.8g(ガスクロマトグラフィー
純度100%、収率98.4%)が得られた。このものの融点
は103〜104℃であった。
Reference Production Example 4 Synthesis of m-hydroxybenzaldehyde (using sulfuric acid water as a tert-butylating agent) A 500 ml four-necked flask was equipped with a stirrer and a reflux condenser, and m-tert-butoxybenzaldehyde 7 was added thereto.
6.8 g (0.431 mol) and 145 g (0.740 mol) of 50% aqueous sulfuric acid were added, and the mixture was stirred at room temperature for 1 hour to precipitate white crystals.
Thereafter, the same operation as in Reference Production Example 1 was performed to obtain 51.8 g of m-hydroxybenzaldehyde (gas chromatography purity: 100%, yield: 98.4%). Its melting point was 103-104 ° C.

参考製造例5 p−ヒドロキシベンズアルデヒドの合成
(脱tert−ブチル化剤としてパラトルエンスルホン酸を
使用) 300ml容量の4口フラスコに撹拌器と還流冷却器をと
りつけ、これにp−tert−ブトキシベンズアルデヒド1
7.8g(0.10モル)とパラトルエンスルホン酸0.086g(0.
5ミリモル)を加え、50℃の温度で20〜25mmHgに減圧し
ながら1時間撹拌すると白色の結晶が析出した。この結
晶をテトラヒドロフランとトルエンの混液で溶解し、水
洗後、濃縮するとp−ヒドロキシベンズアルデヒド11.9
g(ガスクロマトグラフィー純度100%、収率97.5%)が
得られた。このものの融点は116〜117℃であった。
Reference Production Example 5 Synthesis of p-hydroxybenzaldehyde (p-toluenesulfonic acid was used as a de-tert-butylating agent) A stirrer and a reflux condenser were attached to a 300 ml four-necked flask, and p-tert-butoxybenzaldehyde 1 was added thereto.
7.8 g (0.10 mol) and 0.086 g (0.
(5 mmol) and stirred at 50 ° C. for 1 hour while reducing the pressure to 20 to 25 mmHg, whereby white crystals were deposited. The crystals were dissolved in a mixture of tetrahydrofuran and toluene, washed with water, and concentrated to obtain p-hydroxybenzaldehyde (11.9%).
g (gas chromatography purity 100%, yield 97.5%) was obtained. Its melting point was 116-117 ° C.

参考製造例6 m−ヒドロキシベンズアルデヒドの合成
(脱tert−ブチル化剤としてパラトルエンスルホン酸を
使用) 30容量の4口フラスコに撹拌器と還流冷却器をとり
つけ、これにm−tert−ブトキシベンズアルデヒド26.7
g(0.15モル)とパラトルエンスルホン酸0.258g(1.5ミ
リモル)を加え、50℃の温度で20〜25mmHgに減圧しなが
ら1時間撹拌すると白色の結晶が析出した。その後、参
考製造例5と同様の操作を行い、m−ヒドロキシベンズ
アルデヒド17.5g(ガスクロマトグラフィー純度100%、
収率95.6%)が得られた。このものの融点は103〜104℃
であった。
Reference Production Example 6 Synthesis of m-hydroxybenzaldehyde (p-toluenesulfonic acid was used as a tert-butylating agent) A 30-volume 4-neck flask was equipped with a stirrer and a reflux condenser, and m-tert-butoxybenzaldehyde 26.7 was added thereto.
g (0.15 mol) and 0.258 g (1.5 mmol) of paratoluenesulfonic acid were added, and the mixture was stirred at 50 ° C. for 1 hour while reducing the pressure to 20 to 25 mmHg, whereby white crystals were precipitated. Thereafter, the same operation as in Reference Production Example 5 was performed, and 17.5 g of m-hydroxybenzaldehyde (gas chromatography purity 100%,
Yield 95.6%). Its melting point is 103-104 ℃
Met.

ハ)発明の効果 本発明の製造法によれば、従来の合成法に比べ、容易
な反応操作で医農薬の中間体として有用な式(I)化合
物を高収率で得ることができる。
C) Effects of the Invention According to the production method of the present invention, a compound of formula (I) useful as an intermediate of a medicinal and agricultural chemical can be obtained in a high yield by a simple reaction operation as compared with a conventional synthesis method.

このようにして得た式(I)化合物は、これを含む反
応液の溶媒を留去しただけの残留物に脱tert−ブチル化
剤と反応させるだけで、医農薬の中間体として有用なp
−又はm−ヒドロキシベンズアルデヒドを蒸留、再結晶
などの精製工程を必要とすることなく、高純度品として
得ることができる。
The compound of formula (I) thus obtained can be used as an intermediate for medicinal and agricultural chemicals only by reacting a residue obtained by distilling off the solvent of a reaction solution containing the compound with a tert-butylating agent.
-Or m-hydroxybenzaldehyde can be obtained as a high-purity product without requiring a purification step such as distillation or recrystallization.

したがって、本発明はp−又はm−ヒドロキシベンズ
アルデヒドの前駆体となる式(I)化合物の工業的に有
利な合成法である。
Therefore, the present invention is an industrially advantageous method for synthesizing a compound of the formula (I) which is a precursor of p- or m-hydroxybenzaldehyde.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】一般式 (式中、Xはハロゲン原子を示す。)で表わされるp−
又はm−tert−ブトキシフェニルマグネシウムハライド
と、 式 (CH32NCHO で表わされるジメチルホルムアミドを反応させ、得られ
た生成物に鉱酸水又は飽和の塩化アンモニウム水を加え
ることを特徴とする 一般式 で表わされるp−又はm−tert−ブトキシベンズアルデ
ヒドの製造法。
(1) General formula (In the formula, X represents a halogen atom.)
Or reacting m-tert-butoxyphenylmagnesium halide with dimethylformamide represented by the formula (CH 3 ) 2 NCHO, and adding aqueous mineral acid or saturated aqueous ammonium chloride to the resulting product. formula A method for producing p- or m-tert-butoxybenzaldehyde represented by the formula:
JP18476689A 1989-07-19 1989-07-19 Process for producing p- or m-tert-butoxybenzaldehyde Expired - Lifetime JP2586950B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18476689A JP2586950B2 (en) 1989-07-19 1989-07-19 Process for producing p- or m-tert-butoxybenzaldehyde

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18476689A JP2586950B2 (en) 1989-07-19 1989-07-19 Process for producing p- or m-tert-butoxybenzaldehyde

Publications (2)

Publication Number Publication Date
JPH0352839A JPH0352839A (en) 1991-03-07
JP2586950B2 true JP2586950B2 (en) 1997-03-05

Family

ID=16158954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18476689A Expired - Lifetime JP2586950B2 (en) 1989-07-19 1989-07-19 Process for producing p- or m-tert-butoxybenzaldehyde

Country Status (1)

Country Link
JP (1) JP2586950B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9217723D0 (en) * 1992-08-20 1992-09-30 Ici Plc Chemical process
JP2003055285A (en) * 2001-08-09 2003-02-26 Hokko Chem Ind Co Ltd 4-tert-BUTOXY-4'-HALOGENOBIPHENYL, METHOD FOR PRODUCING THE SAME AND METHOD FOR PRODUCING 4-HALOGENO-4'- HYDROXYBIPHENYL
CN115124410A (en) * 2022-08-13 2022-09-30 上海珂华生物科技有限公司 Preparation method of 2-fluoro-4-hydroxybenzaldehyde

Also Published As

Publication number Publication date
JPH0352839A (en) 1991-03-07

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