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JPH0578544B2 - - Google Patents
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JPH0578544B2 - - Google Patents

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Publication number
JPH0578544B2
JPH0578544B2 JP7385385A JP7385385A JPH0578544B2 JP H0578544 B2 JPH0578544 B2 JP H0578544B2 JP 7385385 A JP7385385 A JP 7385385A JP 7385385 A JP7385385 A JP 7385385A JP H0578544 B2 JPH0578544 B2 JP H0578544B2
Authority
JP
Japan
Prior art keywords
structural formula
represented
reaction
nitrophenylhydrazine
fluoro
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
Application number
JP7385385A
Other languages
Japanese (ja)
Other versions
JPS61233656A (en
Inventor
Hiroyuki Nakanishi
Mitsuru Kajioka
Kuniaki Yanaka
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.)
Nihon Nohyaku Co Ltd
Original Assignee
Nihon Nohyaku Co Ltd
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 Nihon Nohyaku Co Ltd filed Critical Nihon Nohyaku Co Ltd
Priority to JP7385385A priority Critical patent/JPS61233656A/en
Publication of JPS61233656A publication Critical patent/JPS61233656A/en
Publication of JPH0578544B2 publication Critical patent/JPH0578544B2/ja
Granted legal-status Critical Current

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

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明は構造式() The present invention has the structural formula ()

【化】 で表わされる2−フルオロ−5−ニトロフエニル
ヒドラジン及びその製造方法に関するものであ
る。 本発明の2−フルオロ−5−ニトロフエニルヒ
ドラジンは文献未記載の新規化合物であり、除草
剤の有用な中間体、例えば特開昭59−84872号公
報及び特開昭59−170071号公報等に記載の除草剤
の中間体となりうる化合物である。 本発明の構造式()で表わされる2−フルオ
ロ−5−ニトロフエニルヒドラジンの製造方法を
図示すると下記の通りとなる。
The present invention relates to 2-fluoro-5-nitrophenylhydrazine represented by the following formula and a method for producing the same. The 2-fluoro-5-nitrophenylhydrazine of the present invention is a new compound that has not been described in any literature, and is a useful intermediate for herbicides, such as those disclosed in JP-A-59-84872 and JP-A-59-170071. It is a compound that can be an intermediate for the herbicide described in . The method for producing 2-fluoro-5-nitrophenylhydrazine represented by the structural formula () of the present invention is illustrated as follows.

【化】 即ち構造式()で表わされるアニリン誘導体
を塩酸で処理し、該アニリン誘導体の塩酸塩とし
た後亜硝酸ソーダと反応させて構造式(′)で
表わされるジアゾニウム塩とし、該ジアゾニウム
塩を単離することなく還元剤により還元すること
により構造式()で表わされる2−フルオロ−
5−ニトロフエニルヒドラジンを得ることができ
る。 本反応に使用できる溶媒としては本反応の進行
を阻害しないものであれば良く、通常は水を溶媒
として行なわれるが、構造式()で表わされる
アニリン誘導体の塩酸塩を製造する際に塩の生成
を容易に行う目的で、構造式()で表わされる
アニリン誘導体を溶解し且つ以後の反応の進行を
阻害しない溶媒を用いることができ、例えば酢酸
等を挙げることができる。 本反応で使用することができる還元剤として
は、例えば亜硫酸ナトリウム、亜硫酸ガス、ナト
リウムハイドロサルフアイト、塩化第一スズ等を
挙げることができるが、本発明はこれらに限定さ
れるものではない。 構造式()で表わされるアニリン誘導体を塩
酸及び亜硝酸ソーダでジアゾ化し、次いで還元剤
で処理して目的とする構造式()で表わされる
ヒドラジンを製造する際反応試剤の割合は、構造
式()で表わされるアニリン誘導体1モルに対
して、塩酸にあつては過剰に使用すれば良く、亜
硝酸ソーダにあつては等モル量乃至過剰に使用す
れば良く、又還元剤は使用する還元剤の種類によ
つて一定しないが目的とする構造式()で表わ
されるヒドラジンが充分生成する量を使用すれば
良い。 本反応は一般的には冷却下、例えば−20℃乃至
10℃の範囲から適宜選択することができる。反応
時間は0.5乃至48時間の範囲から適宜選択すれば
良い。 反応終了後適当な溶媒で目的物を抽出し過単
離すれば良く、得られた目的物はそのまま次の反
応に使用することもでき又必要に応じて精製処理
を行い次の反応に供しても良い。 以下に本発明の実施例を示すが本発明はこれら
に限定されるものではない。 実施例 1 2−フルオロ−5−ニトロアニリン3.12g
(0.02モル)を酢酸5mlに溶解した後塩酸10mlを
加えた。この溶液Aに、水4mlに溶解した亜硫酸
ナトリウム1.52g(0.022モル)の溶液Bを−2
℃で滴下した。滴下終了後この溶液を、塩化第一
スズ13.54gを15mlの塩酸に溶解した溶液Cに−
10℃〜−5で20分かけて滴下した後冷却下1時間
撹拌を行つた。反応終了後析出物を集し、この
析出物に水を加えて水酸化ナトリウム水溶液で塩
基性とし、エーテルで抽出し抽出液を乾燥した後
溶媒を留去することにより目的物である2−フル
オロ−5−ニトロフエニルヒドラジン1.68gを結
晶物として得る。 収率49.1% NMRスペクトルデータ δTMS CDCl3 3.7(b.2H)、5.65(b.1H)、6.8〜7.2
(dd.1H)7.4〜7.8(m、1H)、7.9〜8.2(dd.1H) 本発明の構造式()で表される2−フルオロ
−5−ニトロフエニルヒドラジンは特開昭59−
84872号、特開昭60−48976号、特開昭60−48977
号、特開昭59−170071号、特開昭60−51180号公
報に記載の方法と同様にして、除草剤として有用
な特開昭59−84872号及び特開昭59−170071号公
報記載の化合物を製造することができる。
[Chemical Formula] That is, the aniline derivative represented by the structural formula () is treated with hydrochloric acid to form the hydrochloride of the aniline derivative, and then reacted with sodium nitrite to form the diazonium salt represented by the structural formula ('). By reducing with a reducing agent without isolating 2-fluoro-
5-nitrophenylhydrazine can be obtained. The solvent that can be used for this reaction is any solvent that does not inhibit the progress of this reaction, and water is usually used as a solvent, but when producing the hydrochloride of the aniline derivative represented by the structural formula (), For the purpose of facilitating the production, a solvent can be used that dissolves the aniline derivative represented by the structural formula () and does not inhibit the progress of the subsequent reaction, such as acetic acid. Examples of the reducing agent that can be used in this reaction include sodium sulfite, sulfur dioxide gas, sodium hydrosulfite, and stannous chloride, but the present invention is not limited thereto. When the aniline derivative represented by the structural formula () is diazotized with hydrochloric acid and sodium nitrite, and then treated with a reducing agent to produce the desired hydrazine represented by the structural formula (), the proportion of the reaction reagent is determined by the structural formula ( ) For 1 mole of the aniline derivative represented by (), hydrochloric acid may be used in excess; sodium nitrite may be used in an equimolar amount or in excess; Although the amount varies depending on the type of hydrazine, it is sufficient to use an amount that will sufficiently produce the desired hydrazine represented by the structural formula (). This reaction is generally carried out under cooling, e.g. -20°C to
It can be appropriately selected from the range of 10°C. The reaction time may be appropriately selected from the range of 0.5 to 48 hours. After the reaction is complete, the target product can be extracted with an appropriate solvent and overisolated, and the target product obtained can be used as it is in the next reaction, or if necessary, it can be purified and subjected to the next reaction. Also good. Examples of the present invention are shown below, but the present invention is not limited thereto. Example 1 3.12 g of 2-fluoro-5-nitroaniline
(0.02 mol) was dissolved in 5 ml of acetic acid, and then 10 ml of hydrochloric acid was added. To this solution A, add solution B of 1.52 g (0.022 mol) of sodium sulfite dissolved in 4 ml of water to -2
It was added dropwise at ℃. After completing the dropwise addition, this solution was added to Solution C, which was prepared by dissolving 13.54 g of stannous chloride in 15 ml of hydrochloric acid.
The mixture was added dropwise over 20 minutes at 10°C to -5°C, and then stirred for 1 hour while cooling. After the reaction, the precipitate is collected, water is added to the precipitate, made basic with an aqueous sodium hydroxide solution, extracted with ether, the extract is dried, and the solvent is distilled off to obtain the target product, 2-fluorocarbon. 1.68 g of -5-nitrophenylhydrazine are obtained as a crystalline product. Yield 49.1% NMR spectrum data δTMS CDCl 3 3.7 (b.2H), 5.65 (b.1H), 6.8~7.2
(dd.1H) 7.4-7.8 (m, 1H), 7.9-8.2 (dd.1H) The 2-fluoro-5-nitrophenylhydrazine represented by the structural formula () of the present invention is
No. 84872, JP-A-60-48976, JP-A-60-48977
In the same manner as in the methods described in JP-A-59-170071 and JP-A-60-51180, the methods described in JP-A-59-84872 and JP-A-59-170071, which are useful as herbicides, are applied. Compounds can be manufactured.

Claims (1)

【特許請求の範囲】 1 構造式() 【化】 で表わされる−2フルオロ−5−ニトロフエニル
ヒドラジン。 2 構造式() 【化】 で表わされるアニリン誘導体をジアゾ化し、次い
で還元することを特徴とする構造式() 【化】 で表わされる2−フルオロ−5−ニトロフエニル
ヒドラジンの製造方法。
[Claims] 1 -2fluoro-5-nitrophenylhydrazine represented by the structural formula (). 2. A method for producing 2-fluoro-5-nitrophenylhydrazine represented by the structural formula () [Chemical formula], which comprises diazotizing an aniline derivative represented by the structural formula (C) and then reducing it.
JP7385385A 1985-04-08 1985-04-08 2-fluoro-5-nitrophenylhydrazine and production thereof Granted JPS61233656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7385385A JPS61233656A (en) 1985-04-08 1985-04-08 2-fluoro-5-nitrophenylhydrazine and production thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7385385A JPS61233656A (en) 1985-04-08 1985-04-08 2-fluoro-5-nitrophenylhydrazine and production thereof

Publications (2)

Publication Number Publication Date
JPS61233656A JPS61233656A (en) 1986-10-17
JPH0578544B2 true JPH0578544B2 (en) 1993-10-29

Family

ID=13530125

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7385385A Granted JPS61233656A (en) 1985-04-08 1985-04-08 2-fluoro-5-nitrophenylhydrazine and production thereof

Country Status (1)

Country Link
JP (1) JPS61233656A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19501948A1 (en) * 1995-01-24 1996-07-25 Hoechst Ag Process for the preparation of 2-fluorophenyl hydrazine

Also Published As

Publication number Publication date
JPS61233656A (en) 1986-10-17

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