JP2001114741A - Method for producing aromatic cyanobenzoic acid compound - Google Patents

Method for producing aromatic cyanobenzoic acid compound

Info

Publication number
JP2001114741A
JP2001114741A JP29237199A JP29237199A JP2001114741A JP 2001114741 A JP2001114741 A JP 2001114741A JP 29237199 A JP29237199 A JP 29237199A JP 29237199 A JP29237199 A JP 29237199A JP 2001114741 A JP2001114741 A JP 2001114741A
Authority
JP
Japan
Prior art keywords
cyanobenzoic acid
water
aromatic
acid compound
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.)
Granted
Application number
JP29237199A
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Japanese (ja)
Other versions
JP4383604B2 (en
Inventor
Yoshiro Onogawa
善郎 小野川
Yoshihiro Takao
佳浩 高尾
Kimitoshi Kusagaya
公俊 草ヶ谷
Osamu Furusawa
修 古澤
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.)
Ihara Nikkei Chemical Industry Co Ltd
Original Assignee
Ihara Nikkei Chemical Industry Co Ltd
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Priority to JP29237199A priority Critical patent/JP4383604B2/en
Publication of JP2001114741A publication Critical patent/JP2001114741A/en
Application granted granted Critical
Publication of JP4383604B2 publication Critical patent/JP4383604B2/en
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Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide an industrially advantageous method for producing an aromatic cyanobenzoic acid compound. SOLUTION: This method for producing the aromatic cyanobenzoic acid compound represented by general formula (II) (m is an integer of 1-4; and X is a halogen atom) comprises hydrolyzing a trihalogenomethylbenzonitriles represented by general formula (I) (m is an integer of 1-4; and X is a halogen atom) without using a catalyst in the presence of an excess water.

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、医薬品及び農薬の
中間体として有用な芳香族シアノ安息香酸化合物の製造
方法に関する。
The present invention relates to a method for producing an aromatic cyanobenzoic acid compound useful as an intermediate for pharmaceuticals and agricultural chemicals.

【0002】[0002]

【従来の技術】通常、トリハロゲノメチルベンゼン類の
加水分解反応はルイス酸触媒存在下、化学量論量の水と
反応させる方法で行われている。安息香酸類の製法とし
ては、ベンゾトリクロリド、石灰乳、触媒として鉄粉を
混ぜて間接蒸気によって50℃に加熱した後、蒸気を止
めると温度は上昇して加水分解が進行し、水及びベンズ
アルデヒドが留出し始め、ベンズアルデヒドを除去した
後、これを濾過し、安息香酸カルシウムを塩酸で分解し
て結晶を析出させ、製造している(亀谷哲治著、有機薬
品製造化学、廣川書店、p.315(1961))。以
上の方法は古くから行われ、工業的にも実施されている
が、残念ながらシアノ基を有するトリハロゲノメチルベ
ンゼン類の場合は、この方法は適用できない。なぜな
ら、ルイス酸を触媒とした場合、シアノ基を有するトリ
ハロゲノメチルベンゼン類は、シアノ基とルイス酸の強
い配位結合により、触媒としての活性を示さなくなって
しまうためである。
2. Description of the Related Art Usually, a hydrolysis reaction of trihalogenomethylbenzenes is carried out by a method of reacting with a stoichiometric amount of water in the presence of a Lewis acid catalyst. Benzoic acids are produced by mixing benzotrichloride, lime milk, and iron powder as a catalyst, heating the mixture to 50 ° C with indirect steam, and then stopping the steam, the temperature rises, hydrolysis proceeds, and water and benzaldehyde are produced. After distilling off and removing benzaldehyde, it is filtered, and calcium benzoate is decomposed with hydrochloric acid to precipitate crystals (Tetsuharu Kameya, Organic Chemical Manufacturing Chemistry, Hirokawa Shoten, p.315) 1961)). The above method has been practiced for a long time and has been practiced industrially, but unfortunately this method cannot be applied to trihalogenomethylbenzenes having a cyano group. This is because, when a Lewis acid is used as a catalyst, trihalogenomethylbenzenes having a cyano group lose their catalytic activity due to a strong coordination bond between the cyano group and the Lewis acid.

【0003】また、シアノ安息香酸類は、その他、下記
の(a)〜(d)などの方法でも製造されている。 (a)遷移金属を用いたトルニトリル類の酸化によるシ
アノ安息香酸類の合成。その一例として、コバルト触媒
を用いてシアノ安息香酸を合成する。[Arerb.K
him.Zh.1.26−30(1983)]。 (b)芳香族カルボン酸類とニトリル類を混合して加熱
することによってシアノ安息香酸類を合成する(特開昭
50−71643号、同50−83346号)。 (c)4−アミノカルボン酸のジアゾ化、続くKCu
(CN)を用いたシアノ化による4−シアノ安息香
酸の合成[Huaxue Shiji 15(4),2
56,(1993)]。 (d)テレフタラミン酸を、ニッケルイオン、コバルト
イオンまたは銅イオンの、無水酢酸中で加熱脱水して4
−シアノ安息香酸を合成する(特開昭51−8235
号)。しかしながら、シアノ安息香酸類の製法として記
載のある(a)は高価な遷移金属を用いるため工業的で
はなく、(b)は高温条件下で反応しなければならな
い。また、(c)はジアゾ化、シアノ化と2工程で反応
しなければならない。さらに、(d)はテレフタラミン
酸を1〜20倍の無水酢酸を用いて脱水しなければなら
ないので、工業的に適用しうる方法ではない。
[0003] In addition, cyanobenzoic acids are also produced by the following methods (a) to (d). (A) Synthesis of cyanobenzoic acids by oxidation of tolunitrile using transition metal. As one example, cyanobenzoic acid is synthesized using a cobalt catalyst. [Arerb. K
him. Zh. 1.26-30 (1983)]. (B) Cyanobenzoic acids are synthesized by mixing and heating an aromatic carboxylic acid and a nitrile (Japanese Patent Application Laid-Open Nos. 50-71643 and 50-83346). (C) diazotization of 4-aminocarboxylic acid followed by K 2 Cu
Synthesis of 4-cyanobenzoic acid by cyanation using 2 (CN) 4 [Haxue Shiji 15 (4), 2
56, (1993)]. (D) terephthalamic acid is heated and dehydrated in acetic anhydride of nickel ion, cobalt ion or copper ion to obtain 4
-Cyanobenzoic acid is synthesized (JP-A-51-8235).
issue). However, (a) described as a method for producing cyanobenzoic acids is not industrial because an expensive transition metal is used, and (b) requires a reaction under high temperature conditions. In addition, (c) must react with diazotization and cyanation in two steps. Further, (d) is not an industrially applicable method since terephthalamic acid must be dehydrated using 1 to 20 times acetic anhydride.

【0004】[0004]

【発明が解決しようとする課題】したがって本発明は、
芳香族シアノ安息香酸化合物の工業的に有利な製造方法
を提供することを目的とする。
Accordingly, the present invention provides
It is an object of the present invention to provide an industrially advantageous method for producing an aromatic cyanobenzoic acid compound.

【0005】[0005]

【課題を解決するための手段】本発明者らは、上記の目
的に対し鋭意検討した結果、工業的に入手しやすいトリ
ハロゲノメチルベンゾニトリル類をルイス酸や相間移動
触媒を使用することなく、過剰の水を使用して加水分解
反応を行う事により相当する芳香族シアノ安息香酸化合
物を高収率で工業的に製造できることを見い出し、本発
明を完成するに至った。すなわち本発明は(1)一般式
(I)で表されるトリハロゲノメチルベンゾニトリル類
を、触媒を用いずに過剰量の水の存在下で加水分解する
ことを特徴とする一般式(II)で表される芳香族シアノ
安息香酸化合物の製造方法、一般式(I)
Means for Solving the Problems The inventors of the present invention have conducted intensive studies on the above objects, and have found that trihalogenomethylbenzonitrile, which is industrially available, can be prepared without using a Lewis acid or a phase transfer catalyst. The present inventors have found that a corresponding aromatic cyanobenzoic acid compound can be industrially produced in a high yield by performing a hydrolysis reaction using excess water, and have completed the present invention. That is, the present invention provides (1) a method of hydrolyzing a trihalogenomethylbenzonitrile represented by the general formula (I) in the presence of an excess amount of water without using a catalyst. For producing an aromatic cyanobenzoic acid compound represented by the general formula (I)

【0006】[0006]

【化5】 Embedded image

【0007】(式中、mは0〜4の整数を示し、Xはハ
ロゲン原子を示す。)一般式(II)
(Wherein m represents an integer of 0 to 4 and X represents a halogen atom.) Formula (II)

【0008】[0008]

【化6】 Embedded image

【0009】(式中、m及びXは前記と同じ意味をも
つ。) (2)前記の水の量がトリハロゲノメチルベンゾニトリ
ル類に対して28モル倍以上である(1)項記載の芳香
族シアノ安息香酸化合物の製造方法、(3)一般式
(I)で表されるトリハロゲノメチルベンゾニトリル類
を、このトリハロゲノメチルベンゾニトリル類に対して
30モル倍以上の水の存在下で加水分解することを特徴
とする一般式(II)で表される芳香族シアノ安息香酸化
合物の製造方法、一般式(I)
(In the formula, m and X have the same meanings as described above.) (2) The fragrance according to (1), wherein the amount of water is at least 28 mol times the amount of trihalogenomethylbenzonitrile A method for producing an aromatic cyanobenzoic acid compound, (3) hydrolyzing a trihalogenomethylbenzonitrile represented by the general formula (I) in the presence of water at least 30 mol times the trihalogenomethylbenzonitrile A process for producing an aromatic cyanobenzoic acid compound represented by the general formula (II),

【0010】[0010]

【化7】 Embedded image

【0011】(式中、mは0〜4の整数を示し、Xはハ
ロゲン原子を示す。)一般式(II)
(Wherein m represents an integer of 0 to 4, and X represents a halogen atom.) Formula (II)

【0012】[0012]

【化8】 Embedded image

【0013】(式中、m及びXは前記と同じ意味をも
つ。) (4)触媒の不存在下で行う(3)項記載の芳香族シア
ノ安息香酸化合物の製造方法、及び(5)水以外の溶媒
は実質的に含有しない(1)、(2)、(3)又は
(4)項記載の芳香族シアノ安息香酸化合物の製造方法
を提供するものである。本発明において、過剰量の水を
存在させるとは、反応に必要な化学量論量より多い水を
用いて、その余剰分が溶媒として作用することをいう。
(Wherein m and X have the same meanings as described above). (4) The method for producing an aromatic cyanobenzoic acid compound according to (3), which is carried out in the absence of a catalyst, and (5) water The present invention provides a method for producing an aromatic cyanobenzoic acid compound according to the above (1), (2), (3) or (4), wherein the solvent is substantially not contained. In the present invention, the expression of an excessive amount of water means that excess water acts as a solvent by using more water than the stoichiometric amount required for the reaction.

【0014】[0014]

【発明の実施の形態】以下、本発明をさらに詳細に説明
する。本発明では、一般式(I)中のXはハロゲン原子
を示し、トリハロゲノメチル(−CX)基中のXとし
て好ましくはフッ素、塩素又は臭素原子、より好ましく
は塩素原子であり、芳香環に直接結合するXとしては塩
素、臭素、ヨウ素又はフッ素原子が好ましく、塩素、フ
ッ素又は臭素原子がより好ましい。これらXはすべて同
一であっても、異なっていてもよい。本発明に用いる一
般式(I)で表されるトリハロゲノメチルベンゾニトリ
ル類はそれ自体公知であり、例えば4−トリクロロメチ
ルベンゾニトリル、3−クロロ−4−トリクロロメチル
ベンゾニトリル、3−トリクロロメチルベンゾニトリル
等の一種又は二種以上の混合物が挙げられる。これら化
合物は対応するニトリル類の側鎖ハロゲン化反応により
工業的に容易に製造することができる。本発明におい
て、上記の一般式(I)で表される化合物を用いた加水
分解では、前記一般式(II)で表される化合物が得ら
れ、この具体例として例えば4−シアノ安息香酸、2−
クロロ−4−シアノ安息香酸、3−シアノ安息香酸等が
挙げられる。
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. In the present invention, X in the general formula (I) represents a halogen atom, and X in the trihalogenomethyl (—CX 3 ) group is preferably a fluorine, chlorine or bromine atom, more preferably a chlorine atom, and an aromatic ring X directly bonded to is preferably a chlorine, bromine, iodine or fluorine atom, more preferably a chlorine, fluorine or bromine atom. All of these X may be the same or different. The trihalogenomethylbenzonitrile represented by the general formula (I) used in the present invention is known per se, for example, 4-trichloromethylbenzonitrile, 3-chloro-4-trichloromethylbenzonitrile, 3-trichloromethylbenzonitrile. One or a mixture of two or more such as nitriles may be mentioned. These compounds can be industrially easily produced by a side chain halogenation reaction of the corresponding nitriles. In the present invention, hydrolysis using the compound represented by the above general formula (I) yields a compound represented by the above general formula (II), and specific examples thereof include, for example, 4-cyanobenzoic acid, −
Chloro-4-cyanobenzoic acid, 3-cyanobenzoic acid and the like can be mentioned.

【0015】本発明で実施される加水分解反応に使用さ
れる水は、通常の水であれば特に制限はないが、鉄錆等
の濁りや汚れがある場合は濾過して使用することが好ま
しい。本発明においては、加水分解反応に使用する水の
量を過剰量とするが、好ましくはモル比でトリハロゲノ
メチルベンゾニトリル類に対して28モル倍以上であ
り、より好ましくは30モル倍以上であり、特に好まし
くは40〜1000モル倍である。水の量が上記のよう
に過剰でないと、反応速度が遅く、また、反応で発生す
るハロゲン化水素により反応液中の酸の濃度が高くな
り、シアノ基が加水分解された不純物の副生が多くなる
ことがある。また、水の量が少なすぎると撹拌が困難と
なる。一方、1000モル倍以上の水を使用しても加水
分解の反応速度に問題はないが、単位容積あたりの芳香
族シアノ安息香酸化合物の生成量が小さくなり、生産性
の低下を招くことになる。
The water used in the hydrolysis reaction carried out in the present invention is not particularly limited as long as it is ordinary water. However, when there is turbidity or dirt such as iron rust, it is preferably used after filtration. . In the present invention, the amount of water used for the hydrolysis reaction is made an excess amount, but is preferably at least 28 mol times, more preferably at least 30 mol times, relative to the trihalogenomethylbenzonitrile in a molar ratio. And it is particularly preferably 40 to 1000 times by mole. If the amount of water is not excessive as described above, the reaction rate will be low, and the concentration of the acid in the reaction solution will increase due to the hydrogen halide generated in the reaction, and the by-product of impurities in which the cyano group has been hydrolyzed will be generated. May be more. If the amount of water is too small, stirring becomes difficult. On the other hand, there is no problem in the reaction rate of the hydrolysis even when water is used at 1000 mol times or more, but the production amount of the aromatic cyanobenzoic acid compound per unit volume is reduced, and the productivity is reduced. .

【0016】加水分解に使用する水の添加法については
特に制限はない。反応開始時に全量加えても良いし、反
応途中に一部を分けて添加しても良い。また、反応で使
用した水は、目的物である芳香族シアノ安息香酸化合物
を除去した後、例えば水酸化ナトリウムのようなアルカ
リで中和して、再度別の加水分解反応に使用することも
できる。反応方法についても特に制限はなく、回分式も
しくは連続式のいずれも採用することができる。また、
反応は常圧または加圧のいずれでも実施できる。本発明
においては、反応成分及び反応溶媒として水を用いる
が、それ以外の反応試剤、例えば触媒(塩化亜鉛のよう
なルイス酸、相間移動触媒等)を用いる必要がない。特
に、これらの反応試剤を用いないことが好ましい。
The method of adding water used for hydrolysis is not particularly limited. The whole amount may be added at the start of the reaction, or a part may be added in the middle of the reaction. Further, the water used in the reaction can be used again for another hydrolysis reaction after removing the aromatic cyanobenzoic acid compound as the target substance, neutralizing with an alkali such as sodium hydroxide, for example. . The reaction method is not particularly limited, either a batch system or a continuous system can be employed. Also,
The reaction can be carried out either at normal pressure or under pressure. In the present invention, water is used as a reaction component and a reaction solvent, but it is not necessary to use any other reaction reagent, for example, a catalyst (a Lewis acid such as zinc chloride, a phase transfer catalyst, etc.). In particular, it is preferable not to use these reaction reagents.

【0017】また本発明においては水以外の溶媒を実質
的に含まない。実質的に含まないとは、10%以下の量
を含んでいても構わないが、少ない方が好ましく、全く
含まない方が特に好ましいことをいう。水以外の含んで
も良い溶媒としては、反応に悪影響を及ぼさないもので
あればどのような溶媒でも良いが、例としてトルエン、
キシレン、クロロベンゼンなどを挙げることができる。
In the present invention, solvents other than water are not substantially contained. The phrase “substantially not contained” means that a content of 10% or less may be contained, but a smaller amount is preferred, and a complete absence is particularly preferred. As a solvent that may be contained other than water, any solvent may be used as long as it does not adversely affect the reaction.
Xylene, chlorobenzene and the like can be mentioned.

【0018】本発明における反応温度は加水分解反応が
進行する温度であれば特に制限はないが、通常は80℃
以上、好ましくは水の還流温度で行われ、加圧の場合は
圧力に応じて反応温度が高くなる。反応時間は反応温
度、水の量などにより変わり、特に制限はないが、通常
は24時間で十分であり、好ましくは2〜24時間であ
る。
The reaction temperature in the present invention is not particularly limited as long as the hydrolysis reaction proceeds.
As described above, the reaction is preferably carried out at the reflux temperature of water, and in the case of pressurization, the reaction temperature increases according to the pressure. The reaction time varies depending on the reaction temperature, the amount of water, and the like, and is not particularly limited, but usually 24 hours is sufficient, and preferably 2 to 24 hours.

【0019】加水分解反応により生じた芳香族シアノ安
息香酸化合物の分離は、水と混和しない有機溶媒、例え
ば、トルエン、キシレン、クロロベンゼン等で抽出し、
溶媒を回収することにより行うことができる。また、生
成物が水に不溶の固体の場合は、反応溶液をそのまま濾
過しても得られる。これら芳香族シアノ安息香酸化合物
は通常そのままでも十分な純度を有していて、製品とな
りうるが、さらに高純度製品を要求される場合は、再結
晶または蒸留等により精製しても良い。また本発明にお
いて用いるトリハロゲノメチルベンゾニトリル類は、純
品、混合物どちらでも良い。このような方法で得られた
芳香族シアノ安息香酸化合物は、水だけを反応試剤およ
び反応溶媒として使用しているため、特別な精製工程を
経由しないでも十分に高純度である。
The separation of the aromatic cyanobenzoic acid compound generated by the hydrolysis reaction is carried out by extracting with an organic solvent immiscible with water, for example, toluene, xylene, chlorobenzene and the like.
It can be performed by recovering the solvent. When the product is a solid insoluble in water, it can be obtained by filtering the reaction solution as it is. These aromatic cyanobenzoic acid compounds usually have sufficient purity as they are, and can be used as products. However, when higher purity products are required, they may be purified by recrystallization or distillation. The trihalogenomethylbenzonitrile used in the present invention may be either a pure product or a mixture. Since the aromatic cyanobenzoic acid compound obtained by such a method uses only water as a reaction reagent and a reaction solvent, it has a sufficiently high purity without going through a special purification step.

【0020】[0020]

【実施例】次に実施例に基づいて本発明を詳述するが、
本発明はこれに限定されるものではない。
Next, the present invention will be described in detail with reference to Examples.
The present invention is not limited to this.

【0021】合成例1 <3−トリクロロメチルベンゾ
ニトリルの合成> 撹拌機、温度計、コンデンサー、未反応塩素トラップを
備えた500ミリリットルの四つ口フラスコに、m−ト
ルニトリル292.9g(2.5モル)を仕込み130
℃に昇温した。これに40w水銀ランプの光を照射しな
がら442gの塩素を17時間かけて吹き込んだ。塩素
吹き込み終了後、反応液に窒素ガスを1時間パージする
ことで反応液に溶解している塩素ガスを抜き出し、ガス
クロによる分析を行い、この反応液が3−ジクロロメチ
ルベンゾニトリル:0.2%、3−トリクロロメチルベ
ンゾニトリル:99.31%、その他:0.49%の組
成であることを確認した。この反応終了液を蒸留し、3
−トリクロロメチルベンゾニトリルを99%以上の純度
で得た。
Synthesis Example 1 <Synthesis of 3-trichloromethylbenzonitrile> In a 500 ml four-necked flask equipped with a stirrer, a thermometer, a condenser and an unreacted chlorine trap, 292.9 g (2.5%) of m-tolunitrile was added. Mole) 130
The temperature was raised to ° C. 442 g of chlorine was blown into this over 17 hours while irradiating light from a 40 w mercury lamp. After the completion of the chlorine blowing, the reaction solution is purged with nitrogen gas for 1 hour to extract the chlorine gas dissolved in the reaction solution, and analyzed by gas chromatography. The reaction solution is 3-dichloromethylbenzonitrile: 0.2% , 3-trichloromethylbenzonitrile: 99.31%, and others: 0.49%. The reaction-terminated liquid is distilled and 3
-Trichloromethylbenzonitrile was obtained with a purity of more than 99%.

【0022】合成例2 <4−トリクロロメチルベンゾ
ニトリルの合成> m−トルニトリルの代わりにp−トルニトリルを用いた
以外は合成例1と全く同様な操作を行った結果、4−ト
リクロロメチルベンゾニトリルを99%以上の純度で得
た。
Synthesis Example 2 <Synthesis of 4-trichloromethylbenzonitrile> The same operation as in Synthesis Example 1 was performed except that p-tolunitrile was used instead of m-tolunitrile, and as a result, 4-trichloromethylbenzonitrile was converted to 4-trichloromethylbenzonitrile. Obtained with a purity of 99% or more.

【0023】実施例1 <3−シアノ安息香酸の合成> 撹拌機、温度計、コンデンサーを備えた200ミリリッ
トルの四つ口フラスコに、3−トリクロロメチルベンゾ
ニトリル22g(0.10モル)、水110g(6.1
1モル、3−トリクロロメチルベンゾニトリルに対して
61.1モル倍)を一括仕込み、100℃まで昇温し4
時間撹拌した。ガスクロ分析で3−トリクロロメチルベ
ンゾニトリルの消失を確認した後、冷却しろ過した。結
晶は純水で洗浄した後、70℃で乾燥して、3−シアノ
安息香酸14.1g(純度99.3%、収率96%)を
得た。なお、副生成物のイソフタル酸の生成は痕跡程度
であった。
Example 1 <Synthesis of 3-cyanobenzoic acid> In a 200 ml four-necked flask equipped with a stirrer, a thermometer, and a condenser, 22 g (0.10 mol) of 3-trichloromethylbenzonitrile and 110 g of water were placed. (6.1
1 mol, 61.1 mol times based on 3-trichloromethylbenzonitrile), and heated to 100 ° C.
Stirred for hours. After confirming the disappearance of 3-trichloromethylbenzonitrile by gas chromatography analysis, the mixture was cooled and filtered. The crystals were washed with pure water and dried at 70 ° C. to obtain 14.1 g of 3-cyanobenzoic acid (purity: 99.3%, yield: 96%). The generation of the by-product isophthalic acid was about trace.

【0024】実施例2 <4−シアノ安息香酸の合成> 3−トリクロロメチルベンゾニトリルの代わりに4−ト
リクロロメチルベンゾニトリル10g(0.045モ
ル)、水50g(2.78モル、4−トリクロロメチル
ベンゾニトリルに対して61モル倍)を用いた以外は実
施例1と全く同様な処理を行い4−シアノ安息香酸6.
4g(純度99.0%、収率97%)を得た。なお、副
生成物のテレフタル酸の生成は痕跡程度であった。
Example 2 <Synthesis of 4-cyanobenzoic acid> Instead of 3-trichloromethylbenzonitrile, 10 g (0.045 mol) of 4-trichloromethylbenzonitrile, 50 g of water (2.78 mol, 4-trichloromethyl) Except for using benzonitrile, the same treatment as in Example 1 was carried out, except that 4-cyanobenzoic acid was used.
4 g (purity 99.0%, yield 97%) was obtained. The generation of terephthalic acid as a by-product was about trace.

【0025】実施例3 <2−クロロ−4−シアノ安息
香酸の合成> 撹拌機、温度計、コンデンサーを備えた300ミリリッ
トルの四つ口フラスコに、3−クロロ−4−トリクロロ
メチルベンゾニトリル10g(0.039モル)、水2
00g(11.11モル、3−クロロ−4−トリクロロ
メチルベンゾニトリルに対して284.9モル倍)を一
括仕込み、100℃まで昇温し10時間撹拌した。ガス
クロ分析で3−クロロ−4−トリクロロメチルベンゾニ
トリルの消失を確認した後、冷却しろ過した。結晶は純
水で洗浄した後、50℃で乾燥して2−クロロ−4−シ
アノ安息香酸6.0g(純度99.6%、収率85%)
を得た。なお、副生成物の2−クロルテレフタル酸は痕
跡程度しか生成しなかった。
Example 3 <Synthesis of 2-chloro-4-cyanobenzoic acid> 10 g of 3-chloro-4-trichloromethylbenzonitrile was placed in a 300 ml four-necked flask equipped with a stirrer, a thermometer and a condenser. 0.039 mol), water 2
Then, 00 g (11.11 mol, 284.9 mol times based on 3-chloro-4-trichloromethylbenzonitrile) was charged all at once, heated to 100 ° C., and stirred for 10 hours. After confirming the disappearance of 3-chloro-4-trichloromethylbenzonitrile by gas chromatography, the mixture was cooled and filtered. The crystals were washed with pure water, dried at 50 ° C., and 6.0 g of 2-chloro-4-cyanobenzoic acid (purity 99.6%, yield 85%).
I got Incidentally, by-product 2-chloroterephthalic acid was produced only in traces.

【0026】比較例1 4−トリクロロメチルベンゾニトリル30g(0.14
モル)と塩化亜鉛30mg(0.22ミリモル)を10
0ミリリットルの反応フラスコに仕込み、撹拌下130
℃で水5.39g(0.299ミリモル、4−トリクロ
ロメチルベンゾニトリルに対して2.2モル倍)を4時
間かけて滴下した。4−シアノ安息香酸が5%ほど生成
したあたりから反応が進行しなくなったので中断した。
Comparative Example 1 30 g of 4-trichloromethylbenzonitrile (0.14
Mol) and 30 mg (0.22 mmol) of zinc chloride in 10
In a 0 ml reaction flask, add 130
At 39 ° C, 5.39 g of water (0.299 mmol, 2.2 mol times based on 4-trichloromethylbenzonitrile) was added dropwise over 4 hours. About 4% of 4-cyanobenzoic acid was formed, and the reaction was stopped.

【0027】比較例2 撹拌機、温度計、コンデンサーを備えた100ミリリッ
トルの四つ口フラスコに、4−トリクロロメチルベンゾ
ニトリル10g(0.045モル)、水20g(1.1
1モル、4−トリクロロメチルベンゾニトリルに対して
24モル倍)を一括仕込み、100℃まで昇温し7時間
撹拌した。ガスクロ分析で4−トリクロロメチルベンゾ
ニトリルが0.24%残存した段階で反応を停止した
後、冷却しろ過した。得られた結晶をガスクロ分析した
結果、目的生成物である4−シアノ安息香酸が6.2g
(純度88%、収率93%)得られ、そのうち副生成物
であるテレフタル酸が11%であった。
Comparative Example 2 In a 100 ml four-necked flask equipped with a stirrer, a thermometer and a condenser, 10 g (0.045 mol) of 4-trichloromethylbenzonitrile and 20 g of water (1.1 g) were added.
(1 mol, 24 mol times based on 4-trichloromethylbenzonitrile), and the mixture was heated to 100 ° C and stirred for 7 hours. The reaction was stopped at the stage where 0.24% of 4-trichloromethylbenzonitrile remained by gas chromatography analysis, and then cooled and filtered. The obtained crystals were analyzed by gas chromatography. As a result, 6.2 g of 4-cyanobenzoic acid as a target product was obtained.
(Purity 88%, Yield 93%), of which terephthalic acid as a by-product was 11%.

【0028】[0028]

【発明の効果】本発明の芳香族シアノ安息香酸化合物の
製造方法は、工業的に合成しやすい、あるいは入手の容
易なトリハロゲノメチルベンゾニトリル類を出発原料と
することができ、かつ、過剰量の水を使用することによ
ってシアノ基の加水分解を抑えて副生成物の生成を抑制
し、目的とする芳香族シアノ安息香酸化合物を高収率か
つ高純度で製造でき、工業的に極めて有利である。な
お、この目的物は医薬品および農薬の中間体として、広
く利用することができる。
According to the process for producing an aromatic cyanobenzoic acid compound of the present invention, trihalogenomethylbenzonitrile compounds which can be easily synthesized industrially or are easily available can be used as starting materials, The use of water suppresses the hydrolysis of cyano groups and suppresses the generation of by-products, and can produce the target aromatic cyanobenzoic acid compound in high yield and high purity, which is extremely advantageous industrially. is there. In addition, this target substance can be widely used as an intermediate of pharmaceuticals and agricultural chemicals.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 草ヶ谷 公俊 静岡県庵原郡蒲原町蒲原5700番地の1 イ ハラニッケイ化学工業株式会社内 (72)発明者 古澤 修 静岡県庵原郡蒲原町蒲原5700番地の1 イ ハラニッケイ化学工業株式会社内 Fターム(参考) 4H006 AA02 AC13 AC46 AD11 AD15 AD16 BA90 BB31 BC10 BC19 BC31 BC35 BE60 BS30 QN30 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kimitoshi Kusagaya 5700, Kambara-cho, Kambara-cho, Anbara-gun, Shizuoka Prefecture Inside I Haranikkei Chemical Industry Co., Ltd. No.1 F-term in Haranikei Chemical Co., Ltd. (reference) 4H006 AA02 AC13 AC46 AD11 AD15 AD16 BA90 BB31 BC10 BC19 BC31 BC35 BE60 BS30 QN30

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 一般式(I)で表されるトリハロゲノメ
チルベンゾニトリル類を、触媒を用いずに過剰量の水の
存在下で加水分解することを特徴とする一般式(II)で
表される芳香族シアノ安息香酸化合物の製造方法。 一般式(I) 【化1】 (式中、mは0〜4の整数を示し、Xはハロゲン原子を
示す。) 一般式(II) 【化2】 (式中、m及びXは前記と同じ意味をもつ。)
1. A compound represented by the general formula (II), wherein the trihalogenomethylbenzonitrile represented by the general formula (I) is hydrolyzed in the presence of an excess amount of water without using a catalyst. For producing an aromatic cyanobenzoic acid compound. General formula (I) (In the formula, m represents an integer of 0 to 4, and X represents a halogen atom.) Formula (II) (In the formula, m and X have the same meaning as described above.)
【請求項2】 前記の水の量がトリハロゲノメチルベン
ゾニトリル類に対して28モル倍以上である請求項1記
載の芳香族シアノ安息香酸化合物の製造方法。
2. The method for producing an aromatic cyanobenzoic acid compound according to claim 1, wherein the amount of the water is at least 28 mol times with respect to the trihalogenomethylbenzonitrile.
【請求項3】 一般式(I)で表されるトリハロゲノメ
チルベンゾニトリル類を、このトリハロゲノメチルベン
ゾニトリル類に対して30モル倍以上の水の存在下で加
水分解することを特徴とする一般式(II)で表される芳
香族シアノ安息香酸化合物の製造方法。 一般式(I) 【化3】 (式中、mは0〜4の整数を示し、Xはハロゲン原子を
示す。) 一般式(II) 【化4】 (式中、m及びXは前記と同じ意味をもつ。)
3. The method according to claim 1, wherein the trihalogenomethylbenzonitrile represented by the general formula (I) is hydrolyzed in the presence of 30 mol times or more of water of the trihalogenomethylbenzonitrile. A method for producing an aromatic cyanobenzoic acid compound represented by the general formula (II). General formula (I) (In the formula, m represents an integer of 0 to 4, and X represents a halogen atom.) General formula (II) (In the formula, m and X have the same meaning as described above.)
【請求項4】 触媒の不存在下で行う請求項3記載の芳
香族シアノ安息香酸化合物の製造方法。
4. The method for producing an aromatic cyanobenzoic acid compound according to claim 3, which is carried out in the absence of a catalyst.
【請求項5】 水以外の溶媒は実質的に含有しない請求
項1、2、3又は4記載の芳香族シアノ安息香酸化合物
の製造方法。
5. The method for producing an aromatic cyanobenzoic acid compound according to claim 1, wherein a solvent other than water is not substantially contained.
JP29237199A 1999-10-14 1999-10-14 Method for producing aromatic cyanobenzoic acid compound Expired - Fee Related JP4383604B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105859620A (en) * 2016-05-05 2016-08-17 大连理工大学 6-trichloromethyl phenanthridine compound and preparation method and application thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105859620A (en) * 2016-05-05 2016-08-17 大连理工大学 6-trichloromethyl phenanthridine compound and preparation method and application thereof
CN105859620B (en) * 2016-05-05 2018-07-13 大连理工大学 A kind of 6- trichloromethyls phenanthridines class compound and its preparation method and application

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