JPH09268159A - Production of 3-alkyl-6-nitro-1,2,4-trichlorobenzene compound - Google Patents

Production of 3-alkyl-6-nitro-1,2,4-trichlorobenzene compound

Info

Publication number
JPH09268159A
JPH09268159A JP8082689A JP8268996A JPH09268159A JP H09268159 A JPH09268159 A JP H09268159A JP 8082689 A JP8082689 A JP 8082689A JP 8268996 A JP8268996 A JP 8268996A JP H09268159 A JPH09268159 A JP H09268159A
Authority
JP
Japan
Prior art keywords
acid
nitro
formula
compound
alkyl
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.)
Pending
Application number
JP8082689A
Other languages
Japanese (ja)
Inventor
Koichi Hanaki
幸一 花木
Tadahisa Sato
忠久 佐藤
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP8082689A priority Critical patent/JPH09268159A/en
Publication of JPH09268159A publication Critical patent/JPH09268159A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06Preparation of nitro compounds
    • C07C201/12Preparation of nitro compounds by reactions not involving the formation of nitro groups

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PROBLEM TO BE SOLVED: To readily produce the subject compound useful as an intermediate for a photographic coupler or a dye in a short process on an industrial scale at a low cost. SOLUTION: A p-alkylnitrobenzene compound represented by formula I (R<1> is an alkyl) as a raw material is trichlorinated with a an N-chloroisocyanuric acid compound represented by formula II (X<1> and X<2> are each Cl, an alkali metal, etc.), e.g. trichloroisocyanuric acid as a chlorinating agent by using an inorganic acid, an organic acid, etc., as a solvent to produce a 3-alkyl-6- nitro-1,2,4-trichlorobenzene compound represented by formula III. The solvent used is preferably a strong acid, especially preferably H2 SO4 . The quantity thereof used is 0.1-15 times, especially preferably 1.0-8.0 times expressed in terms of volume based on the raw material. The reactional temperature is preferably 10-120 deg.C, especially preferably 50-80 deg.C. The chlorinating agent is used in a molar amount of 0.8-6.0 times based on the compound represented by formula I. When the H2 SO4 , etc., are used, the reactional system is separated into two layers after completing the reaction. Thereby, only the H2 SO4 layer is removed and the posttreatment is simply carried out.

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、カラー写真用カプ
ラー及び染料の合成中間体として有用な3−アルキル−
2,4−ジクロロ−6−ニトロフェノール化合物の前駆
体である3−アルキル−6−ニトロ−1,2,4−トリ
クロロベンゼン化合物の新規製造方法に関する。
FIELD OF THE INVENTION The present invention relates to 3-alkyl-formers useful as synthetic intermediates for color photographic couplers and dyes.
The present invention relates to a novel method for producing a 3-alkyl-6-nitro-1,2,4-trichlorobenzene compound which is a precursor of a 2,4-dichloro-6-nitrophenol compound.

【0002】[0002]

【従来の技術】3−アルキル−2,4−ジクロロ−6−
ニトロフェノール化合物は、カラー写真用カプラー、特
にシアンカプラーの合成中間体として有用であり、その
製造については、これまでに、以下に示すような幾つか
の方法が知られていた。第1の方法は、3−アルキル−
4−クロロフェノール化合物を出発原料とし、6位をス
ルホン化、2位をクロル化した後、スルホン酸基をニト
ロ基へと変換する方法(特開昭47−34326号、同
平3−223235号等)であるが、置換基によっては
原料が高価となってしまう事や、工程数が多い事から、
低コストでの製造に難があった。第2の方法は、p−ア
ルキルベンゼンスルホン酸化合物を出発原料とし、2,
3,5位のトリクロル化後、スルホン酸基をニトロ化基
へ、2位クロル基を水酸基へと変換する方法(特開平1
−228943号等)、また、トリクロル化後、先に2
位クロル基を水酸基に、その後、スルホン酸基をニトロ
基に変換する方法(特開平1−258649号等)であ
るが、いずれも、工程数が多い等の問題があった。
BACKGROUND OF THE INVENTION 3-Alkyl-2,4-dichloro-6-
BACKGROUND ART Nitrophenol compounds are useful as synthetic intermediates for color photographic couplers, especially cyan couplers, and several methods have been known so far for their production. The first method is 3-alkyl-
A method in which a 4-chlorophenol compound is used as a starting material, a 6-position is sulfonated, and a 2-position is chlorinated, and then a sulfonic acid group is converted to a nitro group (JP-A-47-34326 and 3-223235). Etc.), but because the raw material becomes expensive depending on the substituents and the number of steps is large,
It was difficult to manufacture at low cost. The second method uses a p-alkylbenzene sulfonic acid compound as a starting material,
After trichlorination of 3- and 5-positions, a method of converting a sulfonic acid group into a nitrated group and a 2-position chloro group into a hydroxyl group (Japanese Patent Application Laid-Open No. HEI-1)
No. 228943), and after trichlorination, 2
Although this is a method of converting a chloro group into a hydroxyl group and then converting a sulfonic acid group into a nitro group (Japanese Patent Laid-Open No. 1-258649, etc.), all of them have problems such as a large number of steps.

【0003】第3の方法は、p−アルキルニトロベンゼ
ン化合物を出発原料とし、3,5位をジクロル化、6位
をニトロ化した後、ニトロ基の一方を水酸基へと変換す
る方法(特開昭63−44552号等)であるが、やは
り、工程数が多い事、また、安全性等に問題があった。
第4の方法は、同じくp−アルキルニトロベンゼン化合
物を出発原料とし、2,3,5位をトリクロル化後、2
位クロル基を水酸基へと変換する方法(特公平3−29
780号等)である。この方法は、原料も安価で工程数
も少ない。しかしながら、トリクロル化の際に、クロル
化剤として塩素を使用している事や、触媒として金属塩
を用いている事から、工業的規模での製造にはそれなり
の設備対応が必要であるし、また、後処理において触媒
を除去する操作が必要であった。
A third method is to use a p-alkylnitrobenzene compound as a starting material, dichlorize the 3,5-position and nitrate the 6-position, and then convert one of the nitro groups into a hydroxyl group. No. 63-44552), but again, there are problems in that the number of steps is large and that the safety and the like are high.
In the fourth method, a p-alkylnitrobenzene compound is similarly used as a starting material, and the 2,3,5-position is trichlorinated, followed by 2
Method of converting chloro group to hydroxyl group (Japanese Patent Publication No. 3-29)
No. 780). In this method, the raw material is inexpensive and the number of steps is small. However, in the case of trichlorination, since chlorine is used as a chlorinating agent and a metal salt is used as a catalyst, it is necessary to have a certain facility for industrial scale production. Further, an operation of removing the catalyst was required in the post-treatment.

【0004】[0004]

【発明が解決しようとする課題】従って、本発明の目的
は、安価、短工程で工業的規模の製造が容易な3−アル
キル−2,4−ジクロロ−6−ニトロフェノール化合物
の製造方法を提供すべく、その前駆体である3−アルキ
ル−6−ニトロ−1,2,4−トリクロロベンゼン化合
物の新規製造方法を提供し、これまでの方法の問題点を
克服する事にある。
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for producing a 3-alkyl-2,4-dichloro-6-nitrophenol compound which is inexpensive, easy to produce on an industrial scale with a short process. Therefore, it is an object of the present invention to provide a novel method for producing a 3-alkyl-6-nitro-1,2,4-trichlorobenzene compound which is a precursor thereof and to overcome the problems of the conventional methods.

【0005】[0005]

【課題を解決するための手段】本発明者らは、そのよう
な目的を達成すべく鋭意研究を重ねた結果、ある種の安
価なイミド系クロル化剤が、上記課題を解決する事を見
出し、本発明を成すに至った。即ち、本発明は、(1)
下記一般式(I)で表されるp−アルキルニトロベンゼ
ン化合物を出発原料とし、クロル化剤として下記一般式
(II)で表されるN−クロロイソシアヌル酸化合物を用
いてトリクロル化する事を特徴とする下記一般式(III)
で表される3−アルキル−6−ニトロ−1,2,4−ト
リクロロベンゼン化合物の製造方法、
As a result of intensive studies to achieve such an object, the inventors of the present invention have found that a certain inexpensive imide chlorinating agent can solve the above problems. The present invention has been accomplished. That is, the present invention provides (1)
A p-alkylnitrobenzene compound represented by the following general formula (I) is used as a starting material, and an N-chloroisocyanuric acid compound represented by the following general formula (II) is used as a chlorinating agent for trichlorination. The following general formula (III)
A method for producing a 3-alkyl-6-nitro-1,2,4-trichlorobenzene compound represented by

【0006】[0006]

【化4】 Embedded image

【0007】(式中、Rはアルキル基を表す。)(In the formula, R represents an alkyl group.)

【0008】[0008]

【化5】 Embedded image

【0009】(式中、X1 及びX2 は、塩素、水素、ア
ルカリ金属またはアルカリ土類金属を表す。)
(In the formula, X 1 and X 2 represent chlorine, hydrogen, an alkali metal or an alkaline earth metal.)

【0010】[0010]

【化6】 [Chemical 6]

【0011】(式中、Rは一般式(I)のそれと同義で
ある。)
(In the formula, R has the same meaning as in formula (I).)

【0012】(2)N−クロロイソシアヌル酸化合物と
して、トリクロロイソシアヌル酸を用いる事を特徴とす
る(1)記載の製造方法、(3)強酸中で行う事を特徴
とする(1)または(2)記載の製造方法、(4)強酸
として、硫酸を用いる事を特徴とする(3)記載の製造
方法を提供するものである。
(2) Trichloroisocyanuric acid is used as the N-chloroisocyanuric acid compound, (1) The production method described in (1), or (3) The method is characterized in that it is carried out in a strong acid. And (4) sulfuric acid is used as the strong acid.

【0013】[0013]

【発明の実施の形態】以下に、本発明について詳しく述
べる。まず、化合物について詳細に説明する。Rは直
鎖、分岐または環状のアルキル基を表すが、好ましくは
メチル基、エチル基、プロピル基、イソプロピル基、ブ
チル基、イソブチル基、t−ブチル基、オクチル基、シ
クロプロピル基、シクロヘキシル基であり、更に好まし
くはメチル基、エチル基、イソプロピル基、特に好まし
くはエチル基である。一般式(II)で表される化合物と
しては、好ましくは、X1 が塩素、X2 がナトリウムの
ジクロロイソシアヌル酸ナトリウム、またはX1 、X2
が共に塩素のトリクロロイソシアヌル酸であり、更に好
ましくは、トリクロロイソシアヌル酸である。
BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below. First, the compounds will be described in detail. R represents a linear, branched or cyclic alkyl group, preferably a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a t-butyl group, an octyl group, a cyclopropyl group, a cyclohexyl group. Of these, a methyl group, an ethyl group and an isopropyl group are more preferable, and an ethyl group is particularly preferable. The compound represented by the general formula (II) is preferably sodium dichloroisocyanurate in which X 1 is chlorine, X 2 is sodium, or X 1 and X 2.
Are both chlorine trichloroisocyanuric acid, and more preferably trichloroisocyanuric acid.

【0014】以下に、本発明の製造方法で得られる一般
式(III) で表される化合物について具体例を示すが、本
発明はそれらに限定されるものではない。
Specific examples of the compound represented by the general formula (III) obtained by the production method of the present invention are shown below, but the present invention is not limited thereto.

【0015】[0015]

【化7】 Embedded image

【0016】[0016]

【化8】 Embedded image

【0017】[0017]

【化9】 Embedded image

【0018】次に、製造方法について詳細に説明する。
本発明の製造方法は、下記<スキーム1>によって表さ
れる。 <スキーム1>
Next, the manufacturing method will be described in detail.
The production method of the present invention is represented by the following <Scheme 1>. <Scheme 1>

【0019】[0019]

【化10】 Embedded image

【0020】(式中、Rは一般式(I)のそれと、X1
及びX2 は一般式(II)のそれと同義である。)
(In the formula, R is the same as that of the general formula (I) and X 1
And X 2 have the same meanings as in formula (II). )

【0021】以下に詳しく説明する。まず、溶媒として
は、無溶媒で行う事も可能であるが、用いる場合には、
ハロゲン化炭化水素(例えば、塩化メチレン、クロロホ
ルム、四塩化炭素、テトラクロロエタン、クロロベンゼ
ン、o−ジクロロベンゼン、1,2,4−トリクロロベ
ンゼン)、ニトロ化炭化水素(例えば、ニトロベンゼ
ン、o−クロロニトロベンゼン)、二硫化炭素、無機酸
(例えば、硫酸)、有機酸(例えば、酢酸、トリフルオ
ロ酢酸、ジクロロ酢酸、メタンスルホン酸、トリフルオ
ロメタンスルホン酸)またはそれらの混合物等が挙げら
れる。好ましくは、無機酸、有機酸またはそれらの混合
物であり、更に好ましくは強酸、特に好ましくは硫酸で
ある。使用量は、原料のp−アルキルニトロベンゼンに
対し、容量にして0.1〜15倍、好ましくは0.5〜
10倍、更に好ましくは1.0〜8.0倍である。次
に、反応温度は、10〜120℃であり、好ましくは3
0〜100℃、更に好ましくは50〜80℃である。
The details will be described below. First, as the solvent, it is possible to carry out without a solvent, but when used,
Halogenated hydrocarbons (eg methylene chloride, chloroform, carbon tetrachloride, tetrachloroethane, chlorobenzene, o-dichlorobenzene, 1,2,4-trichlorobenzene), nitrated hydrocarbons (eg nitrobenzene, o-chloronitrobenzene) , Carbon disulfide, an inorganic acid (for example, sulfuric acid), an organic acid (for example, acetic acid, trifluoroacetic acid, dichloroacetic acid, methanesulfonic acid, trifluoromethanesulfonic acid) or a mixture thereof. An inorganic acid, an organic acid or a mixture thereof is preferable, a strong acid is more preferable, and a sulfuric acid is particularly preferable. The amount used is 0.1 to 15 times, preferably 0.5 to 15 times, the volume of the raw material p-alkylnitrobenzene.
It is 10 times, more preferably 1.0 to 8.0 times. Next, the reaction temperature is 10 to 120 ° C., preferably 3
The temperature is 0 to 100 ° C, more preferably 50 to 80 ° C.

【0022】また、クロル化剤であるN−クロロイソシ
アヌル酸化合物の使用量は、原料のp−アルキルニトロ
ベンゼンに対して0.8〜6.0倍モルであり、好まし
くは0.9〜3.3倍モル、更に好ましくは1.0〜
2.2倍モルである。なお、ここで、得られた3−アル
キル−6−ニトロ−1,2,4−トリクロロベンゼン化
合物を、抽出等の常法操作にて取り出す事も可能である
が、硫酸等を用いた場合は、反応終了時に系が2層に分
離している事から、硫酸層のみを除去し、残りをそのま
ま次反応に用いる事もできるので、後処理が非常に簡便
である。
The amount of the N-chloroisocyanuric acid compound used as the chlorinating agent is 0.8 to 6.0 times mol, preferably 0.9 to 3. 3 times mole, more preferably 1.0 to
It is 2.2 times the molar amount. The 3-alkyl-6-nitro-1,2,4-trichlorobenzene compound thus obtained can be taken out by a conventional method such as extraction, but when sulfuric acid or the like is used, Since the system is separated into two layers at the end of the reaction, it is possible to remove only the sulfuric acid layer and use the rest for the next reaction as it is, so the post-treatment is very simple.

【0023】[0023]

【実施例】以下、実施例に基づき、本発明を詳しく説明
する。例示化合物(III−2)の合成例を、実施例1〜4
に示す。
EXAMPLES The present invention will be described in detail below based on examples. Examples 1 to 4 show synthesis examples of the exemplified compound (III-2).
Shown in

【0024】[0024]

【化11】 Embedded image

【0025】実施例1 p−エチルニトロベンゼン13.5ml(99.8mmol)
を硫酸50.0mlと混合し、それにトリクロロイソシア
ヌル酸34.8g(149.7mmol)を加えた。70℃
にて8時間攪拌後、分離した2層の硫酸層のみを除去
し、下記組成の生成物を得た。 薄層クロマトグラフィー(HPLC)面積%(検出波長:254nm) 6−エチル−3−ニトロ−1−クロロベンゼン : 4.1% 5−エチル−2−ニトロ−1,4−ジクロロベンゼン: 1.8% 2−エチル−5−ニトロ−1,3−ジクロロベンゼン: 6.1% 化合物(III−2) :82.2% 3−エチル−6−ニトロ−1,2,4,5−テトラクロロベンゼン : 4.0% なお、除去した硫酸層中には、上記化合物等の混入はほ
とんど認められなかった。
Example 1 13.5 ml (99.8 mmol) of p-ethylnitrobenzene
Was mixed with 50.0 ml of sulfuric acid, to which was added 34.8 g (149.7 mmol) of trichloroisocyanuric acid. 70 ° C
After stirring for 8 hours, only the separated two sulfuric acid layers were removed to obtain a product having the following composition. Thin layer chromatography (HPLC) area% (detection wavelength: 254 nm) 6-ethyl-3-nitro-1-chlorobenzene: 4.1% 5-ethyl-2-nitro-1,4-dichlorobenzene: 1.8% 2-Ethyl-5-nitro-1,3-dichlorobenzene: 6.1% Compound (III-2): 82.2% 3-Ethyl-6-nitro-1,2,4,5-tetrachlorobenzene: 4 0.0% It should be noted that the above-mentioned compounds and the like were hardly mixed in the removed sulfuric acid layer.

【0026】実施例2 実施例1記載の方法において、硫酸75.0ml、反応温
度70〜75℃、反応時間を4時間に変更したところ、
下記組成を与えた。 HPLC面積%(検出波長:254nm) 6−エチル−3−ニトロ−1−クロロベンゼン : 3.6% 5−エチル−2−ニトロ−1,4−ジクロロベンゼン: 2.0% 2−エチル−5−ニトロ−1,3−ジクロロベンゼン: 3.6% 化合物(III−2) :83.4% 3−エチル−6−ニトロ−1,2,4,5−テトラクロロベンゼン : 4.9%
Example 2 In the method described in Example 1, the sulfuric acid was changed to 75.0 ml, the reaction temperature was changed to 70 to 75 ° C., and the reaction time was changed to 4 hours.
The following composition was given. HPLC area% (detection wavelength: 254 nm) 6-ethyl-3-nitro-1-chlorobenzene: 3.6% 5-ethyl-2-nitro-1,4-dichlorobenzene: 2.0% 2-ethyl-5 Nitro-1,3-dichlorobenzene: 3.6% Compound (III-2): 83.4% 3-Ethyl-6-nitro-1,2,4,5-tetrachlorobenzene: 4.9%

【0027】実施例3 実施例1記載の方法において、トリクロロイソシアヌル
酸量を23.2g(99.8mmol)に変更したところ、
下記組成を与えた。 HPLC面積%(検出波長:254nm) 6−エチル−3−ニトロ−1−クロロベンゼン : 1.8% 5−エチル−2−ニトロ−1,4−ジクロロベンゼン: 5.9% 2−エチル−5−ニトロ−1,3−ジクロロベンゼン:24.2% 化合物(III−2) :63.4% 3−エチル−6−ニトロ−1,2,4,5−テトラクロロベンゼン : 0.9%
Example 3 In the method described in Example 1, the amount of trichloroisocyanuric acid was changed to 23.2 g (99.8 mmol).
The following composition was given. HPLC area% (detection wavelength: 254 nm) 6-ethyl-3-nitro-1-chlorobenzene: 1.8% 5-ethyl-2-nitro-1,4-dichlorobenzene: 5.9% 2-ethyl-5 Nitro-1,3-dichlorobenzene: 24.2% Compound (III-2): 63.4% 3-Ethyl-6-nitro-1,2,4,5-tetrachlorobenzene: 0.9%

【0028】実施例4 実施例1記載の方法において、クロル化剤をジクロロイ
ソシアヌル酸ナトリウムとし、その使用量を22.0g
(100.0mmol)、反応温度を65〜70℃、反応時
間を9時間に変更したところ、下記組成を与えた。 HPLC面積%(検出波長:254nm) 6−エチル−3−ニトロ−1−クロロベンゼン :46.0% 5−エチル−2−ニトロ−1,4−ジクロロベンゼン:15.7% 2−エチル−5−ニトロ−1,3−ジクロロベンゼン:33.1% 化合物(III−2) : 3.1% なお、ジクロロイソシアヌル酸ナトリウム使用量の増量
により、目的物(III−2)の生成率アップが認められ
た。
Example 4 In the method described in Example 1, the chlorinating agent was sodium dichloroisocyanurate and the amount used was 22.0 g.
(100.0 mmol), the reaction temperature was changed to 65 to 70 ° C., and the reaction time was changed to 9 hours to give the following composition. HPLC area% (detection wavelength: 254 nm) 6-ethyl-3-nitro-1-chlorobenzene: 46.0% 5-ethyl-2-nitro-1,4-dichlorobenzene: 15.7% 2-ethyl-5- Nitro-1,3-dichlorobenzene: 33.1% Compound (III-2): 3.1% In addition, the production rate of the target product (III-2) was increased by increasing the amount of sodium dichloroisocyanurate used. It was

【0029】本発明におけるクロル化剤N−クロロイソ
シアヌル酸化合物の有効性を明確にすべく、以下に、通
常良くクロル化剤として用いられる塩化スルフリル、N
CSによる例示化合物(III−2)の合成検討例を、比較
例1〜3に示す。 比較例1 実施例1記載の方法において、クロル化剤を塩化スルフ
リルとし、その使用量を16.0ml(199.2mmo
l)、反応温度を70〜75℃、反応時間を4時間に変
えて行ったが、ベンゼン環クロル化物は全く得られなか
った。
In order to clarify the effectiveness of the chlorinating agent N-chloroisocyanuric acid compound in the present invention, sulfuryl chloride and N, which are commonly used as chlorinating agents, are described below.
Comparative examples 1 to 3 show examples of studies on the synthesis of the exemplary compound (III-2) by CS. Comparative Example 1 In the method described in Example 1, the chlorinating agent was sulfuryl chloride, and the amount used was 16.0 ml (199.2 mmo).
l), the reaction temperature was changed to 70 to 75 ° C. and the reaction time was changed to 4 hours, but no benzene ring chlorinated product was obtained.

【0030】比較例2 実施例1記載の方法において、クロル化剤をN−クロロ
サクシンイミド(NCS)とし、その使用量を40.0
g(299.6mmol)、反応温度を65〜70℃に変え
て行ったところ、下記組成を与えた。 HPLC面積%(検出波長:254nm) 6−エチル−3−ニトロ−1−クロロベンゼン :60.4% 5−エチル−2−ニトロ−1,4−ジクロロベンゼン: 1.6% 2−エチル−5−ニトロ−1,3−ジクロロベンゼン: 1.8% 化合物(III−2) : 0.1%
Comparative Example 2 In the method described in Example 1, the chlorinating agent was N-chlorosuccinimide (NCS), and the amount used was 40.0.
g (299.6 mmol) and the reaction temperature was changed to 65 to 70 ° C. to give the following composition. HPLC area% (detection wavelength: 254 nm) 6-ethyl-3-nitro-1-chlorobenzene: 60.4% 5-ethyl-2-nitro-1,4-dichlorobenzene: 1.6% 2-ethyl-5 Nitro-1,3-dichlorobenzene: 1.8% Compound (III-2): 0.1%

【0031】比較例3 比較例2記載の方法において、NCS量を60.0g
(449.3mmol)、反応温度を95℃、反応時間を2
時間としたところ、下記組成を与えた。 HPLC面積%(検出波長:254nm) 6−エチル−3−ニトロ−1−クロロベンゼン :31.3% 5−エチル−2−ニトロ−1,4−ジクロロベンゼン: 1.1% 2−エチル−5−ニトロ−1,3−ジクロロベンゼン: 0.9% なお、目的物(III−2)の生成は認められなかった。
Comparative Example 3 In the method described in Comparative Example 2, the NCS amount was 60.0 g.
(449.3 mmol), reaction temperature 95 ° C., reaction time 2
When the time was taken, the following composition was given. HPLC area% (detection wavelength: 254 nm) 6-ethyl-3-nitro-1-chlorobenzene: 31.3% 5-ethyl-2-nitro-1,4-dichlorobenzene: 1.1% 2-ethyl-5- Nitro-1,3-dichlorobenzene: 0.9% The formation of the target product (III-2) was not observed.

【0032】本発明により得られた一般式(III) で表さ
れる3−アルキル−6−ニトロ−1,2,4−トリクロ
ロベンゼン化合物の有用性の一例として、カラー写真用
シアンカプラーの合成中間体として有用である2,4−
ジクロロ−3−エチル−6−ニトロフェノールの合成に
ついて示す。
As an example of the usefulness of the 3-alkyl-6-nitro-1,2,4-trichlorobenzene compound represented by the general formula (III) obtained according to the present invention, a synthetic intermediate cyan coupler for color photography 2,4-useful as body
The synthesis of dichloro-3-ethyl-6-nitrophenol is shown.

【0033】[0033]

【化12】 Embedded image

【0034】参考例 水18.0mlをメタノール150.0mlに混合し、KO
H29.0g(純度85%、439.3mmol)を徐々に
加えた。それを、還流するまで加熱後、実施例1で得ら
れた化合物(III−2)を含有する液体を滴下、そのまま
4時間加熱還流を行った。反応終了後、系を酸性にして
HPLCで定量すると、目的とする2,4−ジクロロ−
3−エチル−6−ニトロフェノールが生成率71.8%
(p−エチルニトロベンゼンからの2工程で)で生成し
ている事が確認された。
Reference Example 18.0 ml of water was mixed with 150.0 ml of methanol and KO
29.0 g of H (purity 85%, 439.3 mmol) was gradually added. After heating it to reflux, the liquid containing the compound (III-2) obtained in Example 1 was dropped, and the mixture was heated and refluxed for 4 hours. After completion of the reaction, the system was acidified and quantified by HPLC, and the target 2,4-dichloro-
3-Ethyl-6-nitrophenol production rate 71.8%
It was confirmed that it was produced (in two steps from p-ethylnitrobenzene).

【0035】[0035]

【発明の効果】本発明の3−アルキル−6−ニトロ−
1,2,4−トリクロロベンゼン化合物の製造方法を用
いる事で、カラー写真用カプラー及び染料の合成中間体
として有用な3−アルキル−2,4−ジクロロ−6−ニ
トロフェノール化合物の製造が、安価、短工程且つ工業
的規模で容易な方法で可能となった。
EFFECT OF THE INVENTION 3-Alkyl-6-nitro-of the present invention
By using the method for producing a 1,2,4-trichlorobenzene compound, the production of a 3-alkyl-2,4-dichloro-6-nitrophenol compound useful as a synthetic intermediate for color photographic couplers and dyes is inexpensive. It became possible with a short process and an easy method on an industrial scale.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 下記一般式(I)で表されるp−アルキ
ルニトロベンゼン化合物を、下記一般式(II)で表され
るN−クロロイソシアヌル酸化合物を用いてトリクロル
化する事を特徴とする下記一般式(III) で表される3−
アルキル−6−ニトロ−1,2,4−トリクロロベンゼ
ン化合物の製造方法。 【化1】 (式中、Rはアルキル基を表す。) 【化2】 (式中、X1 及びX2 は、塩素、水素、アルカリ金属ま
たはアルカリ土類金属を表す。) 【化3】 (式中、Rは一般式(I)のそれと同義である。)
1. A p-alkylnitrobenzene compound represented by the following general formula (I) is trichlorinated with an N-chloroisocyanuric acid compound represented by the following general formula (II). 3-represented by the general formula (III)
Process for producing alkyl-6-nitro-1,2,4-trichlorobenzene compound. Embedded image (In the formula, R represents an alkyl group.) (In the formula, X 1 and X 2 represent chlorine, hydrogen, an alkali metal or an alkaline earth metal.) (In the formula, R has the same meaning as in formula (I).)
【請求項2】 N−クロロイソシアヌル酸化合物とし
て、トリクロロイソシアヌル酸を用いる事を特徴とする
請求項1記載の製造方法。
2. The production method according to claim 1, wherein trichloroisocyanuric acid is used as the N-chloroisocyanuric acid compound.
【請求項3】 強酸中で行う事を特徴とする請求項1ま
たは2記載の製造方法。
3. The production method according to claim 1, which is carried out in a strong acid.
【請求項4】 強酸として、硫酸を用いる事を特徴とす
る請求項3記載の製造方法。
4. The production method according to claim 3, wherein sulfuric acid is used as the strong acid.
JP8082689A 1996-04-04 1996-04-04 Production of 3-alkyl-6-nitro-1,2,4-trichlorobenzene compound Pending JPH09268159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8082689A JPH09268159A (en) 1996-04-04 1996-04-04 Production of 3-alkyl-6-nitro-1,2,4-trichlorobenzene compound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8082689A JPH09268159A (en) 1996-04-04 1996-04-04 Production of 3-alkyl-6-nitro-1,2,4-trichlorobenzene compound

Publications (1)

Publication Number Publication Date
JPH09268159A true JPH09268159A (en) 1997-10-14

Family

ID=13781396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8082689A Pending JPH09268159A (en) 1996-04-04 1996-04-04 Production of 3-alkyl-6-nitro-1,2,4-trichlorobenzene compound

Country Status (1)

Country Link
JP (1) JPH09268159A (en)

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