JPS6172744A - Preparation of 2-alkyl-5-haloacetylbenzene sulfonamide - Google Patents

Preparation of 2-alkyl-5-haloacetylbenzene sulfonamide

Info

Publication number
JPS6172744A
JPS6172744A JP19647084A JP19647084A JPS6172744A JP S6172744 A JPS6172744 A JP S6172744A JP 19647084 A JP19647084 A JP 19647084A JP 19647084 A JP19647084 A JP 19647084A JP S6172744 A JPS6172744 A JP S6172744A
Authority
JP
Japan
Prior art keywords
acetyl
alkyl
sulfonamide
lower alcohol
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.)
Granted
Application number
JP19647084A
Other languages
Japanese (ja)
Other versions
JPS6346066B2 (en
Inventor
Kunioki Kato
邦興 加藤
Masao Kawamura
河村 昌男
Hiroshi Itsuda
五田 博
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.)
Sumitomo Seika Chemicals Co Ltd
Original Assignee
Seitetsu Kagaku 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 Seitetsu Kagaku Co Ltd filed Critical Seitetsu Kagaku Co Ltd
Priority to JP19647084A priority Critical patent/JPS6172744A/en
Priority to DE8585105921T priority patent/DE3564569D1/en
Priority to EP85105921A priority patent/EP0162404B1/en
Publication of JPS6172744A publication Critical patent/JPS6172744A/en
Priority to US07/178,833 priority patent/US4853158A/en
Publication of JPS6346066B2 publication Critical patent/JPS6346066B2/ja
Priority to US07/328,388 priority patent/US4943655A/en
Granted legal-status Critical Current

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

Abstract

PURPOSE:To prepare the titled compound useful as an intermediate raw material of pharmaceuticals and agricultural chemicals, in high yield, suppressing the production of by-product, using inexpensive solvent, by halogenating 5-acetyl-2- alkylbenzene sulfonamide in a lower alcohol. CONSTITUTION:The objective compound of formula II (X is Cl, Br or I) can be produced by halogenating the 5-acetyl-2-alkylbenzene sulfonamide of formula I (R is 1-5C alkyl) usually with bromine, in a lower alcohol such as methanol at 20-90 deg.C, preferably 30-60 deg.C. The starting compound of formula I is obtained by reacting a 4-alkylacetophenone with sulfuric anhydride acid, and halosul fonylating and amidating the reaction product.

Description

【発明の詳細な説明】 〔発明の目的〕 (産業上の利用分野) この発明は、2−アルキルー5−ハロアセチルベンゼン
スルホンアミドの製法に関するものである0 2−アルキルー5−ハロアセチルベンゼンスルホンアミ
ドは,医薬,農薬の中間原料として有用な物質である。
Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to a method for producing 2-alkyl-5-haloacetylbenzenesulfonamide. is a substance useful as an intermediate raw material for pharmaceuticals and agricultural chemicals.

例えば、5−プロモアセチル−2−メチルベンゼンスル
ホンアミドは、降圧剤とじて知うれるフェニルエタノー
ルアミン誘廊体製造の中間原料として知られている。
For example, 5-promoacetyl-2-methylbenzenesulfonamide is known as an intermediate raw material for the production of phenylethanolamine derivatives, also known as antihypertensive agents.

(従来の技術)゛ 2−アルキル−5−ハロアセチルベンゼンスルホンアミ
ドを製造する方法として従来、5−アセチル−2−アル
キルベンゼンスルホン酸EFt−酢(発明が解決しよう
とする問題点) この製法における反応は、(1)反応温度が高い。
(Prior art) As a method for producing 2-alkyl-5-haloacetylbenzenesulfonamide, conventionally, 5-acetyl-2-alkylbenzenesulfonic acid EFt-vinegar (Problems to be solved by the invention) Reactions in this production method (1) The reaction temperature is high.

(2)副生物として、かなりの2−アルキル−5−ジハ
ロアセチルベンゼンスルホンアミドが生成シ、低収率で
ある。(3)副生物との分離が困難である等の欠点を有
し、工業的に有用な方法とはいえない。
(2) A considerable amount of 2-alkyl-5-dihaloacetylbenzenesulfonamide is produced as a by-product, resulting in a low yield. (3) It has drawbacks such as difficulty in separating by-products, and cannot be said to be an industrially useful method.

本発明は、上記従来法の欠点を排除して、コスト的にも
安価な低級アルコールを用い、5−アセ51チル−2−
アルキルベンゼンスルホンアミトラハロゲン化する方法
を提供することにある。
The present invention eliminates the drawbacks of the conventional methods described above, uses inexpensive lower alcohols, and uses 5-ace51tyl-2-
An object of the present invention is to provide a method for amitrahalogenating an alkylbenzene sulfone.

〔発明の構成〕[Structure of the invention]

(問題点を解決する定めの手段) (ここにRはcl−Csのアルキル基を示す。)で表わ
される5−アセチル−2−アルキルベンゼンスルホンア
ミドを低級アルコール中でハロゲン化することによって Br、I、Rはcl−Csのアルキル基を示す。)で表
わされる2−アルキル−5−ハロアセチルベンゼンスル
ホンアミドを高収率で製造するにあ親(作 用) 本発明の製造原料として用いる一般式(I)キル基を示
す。)で表わされる5−アセチル−2−アルキルベンゼ
ンスルホンアミド、−1≧おヨヒソの製造法については
、本発明者らが先に出願した特ft昭56−21388
9号(特開昭58−118557は発煙硫酸を作用させ
ることにより得られる。5−アセチル−2−アルキルベ
ンゼンスルホン酸をハロスルホニル化し、引きつづきこ
れをアミド化することにより得られる。
(Determined means for solving the problem) By halogenating 5-acetyl-2-alkylbenzenesulfonamide represented by (herein R represents an alkyl group of cl-Cs) in a lower alcohol, Br, I , R represents an alkyl group of cl-Cs. 2-alkyl-5-haloacetylbenzenesulfonamide represented by ) in high yield. ) 5-acetyl-2-alkylbenzenesulfonamide, -1≧Oyohiso
No. 9 (JP-A-58-118557) is obtained by reacting with fuming sulfuric acid. It is obtained by halosulfonylating 5-acetyl-2-alkylbenzenesulfonic acid and subsequently amidating it.

この5−アセチル−2−アルキルベンゼンスルホンアミ
ドを低級アルコール中でハロゲン化するこトニより高収
率で2−アルキル−5−ハロアセチルベンゼンスルホン
アミドが得られる。
By halogenating this 5-acetyl-2-alkylbenzenesulfonamide in a lower alcohol, 2-alkyl-5-haloacetylbenzenesulfonamide can be obtained in high yield.

RR (1)          (n) ここにRはcl−Csのアルキル基であり、目的とする
製品に応じてメチル、エチル、プロピルブチルまたは、
ペンチル基を持っ5−アセチル−2−アルキルベンゼン
スルホンアミFt−原Hトする。
RR (1) (n) Here, R is an alkyl group of cl-Cs, and depending on the target product, methyl, ethyl, propylbutyl, or
A 5-acetyl-2-alkylbenzenesulfonamide Ft-base having a pentyl group is formed.

その例としては 5−アセチル−2−メチルベンゼンスルホンアミド、5
−アセチル−2−エチルベンゼンスルホンアミド、5−
アセチル−2−プロピルベンゼンスルホンアミド、5−
アセチル−2−グチルベンゼンスルホンアミド、5−ア
セチル−2−ペンチルベンゼンスルホンアミドが挙げら
れる。
Examples include 5-acetyl-2-methylbenzenesulfonamide, 5
-Acetyl-2-ethylbenzenesulfonamide, 5-
Acetyl-2-propylbenzenesulfonamide, 5-
Examples include acetyl-2-glutylbenzenesulfonamide and 5-acetyl-2-pentylbenzenesulfonamide.

勿論ノルマルアルキル化合物のみならずイングロビル基
またはブチル基以上では、セヵングリーま之はターシャ
リ−アルキル化合物も本発明に含まれる。
Of course, the present invention includes not only normal alkyl compounds but also secondary and tertiary alkyl compounds having an inglovir group or a butyl group.

本発明の反応に用いる低級アルコールとして弘メタノー
ル、エタノール、グロバノール、プクノール、イソプロ
ピルアルコール、イソブチルアルコール等が1史用可能
であるが取扱上ならびに、経済的な面からメタノールを
用いる場合i多い。
As the lower alcohol used in the reaction of the present invention, methanol, ethanol, globanol, pukunol, isopropyl alcohol, isobutyl alcohol, etc. can be used, but methanol is often used for handling and economical reasons.

ハロゲン化は、塩素、臭素または沃素を用いて行なうが
、通常臭素2滴下して反応させる場合が多い、勿論目的
とする化合物により適宜撰足すもハロゲンの使用′8t
は、5−アセチル−2−アルキルベンゼンスルホンアミ
ドに対して等モルがよく特に過剰に用いる必要はない。
Halogenation is carried out using chlorine, bromine, or iodine, but the reaction is usually carried out by adding two drops of bromine.Of course, the amount of halogen can be added as appropriate depending on the target compound.
is preferably used in an equimolar amount to 5-acetyl-2-alkylbenzenesulfonamide, and there is no need to use an excess amount.

またハロゲン化反応の温度は、20〜90℃ の司囲、
好ましくは30〜60”Cの範囲に保持して行なう。温
度が低過ぎると反応速度が遅く、高過ぎると副反応を起
す場合があって好ましくない。
Further, the temperature of the halogenation reaction ranges from 20 to 90°C,
Preferably, the temperature is maintained within the range of 30 to 60''C. If the temperature is too low, the reaction rate will be slow, and if the temperature is too high, side reactions may occur, which is not preferable.

1  このようにして行なう本発明の反応機構の詳細は
審らかではないが、下記のごとき中間体を経て反応が進
行するものと考えられる。
1 Although the details of the reaction mechanism of the present invention carried out in this manner are not clear, it is thought that the reaction proceeds through the following intermediates.

即ち、5−アセチル−2−アルキルベンゼンスルホンア
ミドを低級アルコール中にてハロゲン化すると H2X (ここに)はcl−Cs  のアルキル基、にはC1〜
C4ノア 7L/キル基、XはCQ、 Br、 I ’
に示す。)で’ F?、bされ;’:、2−アルキルー
5−ハロアセチルベンゼンスルホンアミドジアルキルク
クールヲ生シ、これが加水分解されて、2−アセチル−
5−ハロアセチルベンゼンスルホンアミドが高収率でタ
ナられるものと推定される。
That is, when 5-acetyl-2-alkylbenzenesulfonamide is halogenated in lower alcohol, H2X (here) is the alkyl group of cl-Cs, and C1-
C4 Noah 7L/Kyl group, X is CQ, Br, I'
Shown below. ) in 'F? , 2-alkyl-5-haloacetylbenzenesulfonamide dialkyl chloride is produced, which is hydrolyzed to form 2-acetyl-
It is estimated that 5-haloacetylbenzenesulfonamide can be obtained in high yield.

(実施例) 以下実施例を示して本発明をさらに詳細に説明する。(Example) The present invention will be explained in more detail below with reference to Examples.

実施例1゜ 5−アセチル−2−メチルベンゼンスルホンアミド21
.3 g (0,1モル)をメタノール180gに溶解
した後、35〜40℃に保持してブロム16、Og (
0,1モル)を1.5時間かけて滴下する。
Example 1 5-acetyl-2-methylbenzenesulfonamide 21
.. After dissolving 3 g (0.1 mol) in 180 g of methanol, it was kept at 35-40°C to dissolve bromine 16, Og (
0.1 mol) was added dropwise over 1.5 hours.

さらに10分間攪拌し友後、水80gを添加し30分間
室温で攪拌を続ける。その後一部メタノール水を留去し
、析出し几結晶を濾過、水洗乾燥して、乞 白色の5−70モアヂチル−2−メチルベンゼンスルホ
ンアミド28. Og i得た。(融点146.5〜1
47.5℃)収率は95.9%であった。
After stirring for another 10 minutes, 80 g of water was added and stirring was continued for 30 minutes at room temperature. Thereafter, part of the methanol water was distilled off, and the precipitated crystals were filtered, washed with water, and dried to obtain pale white 5-70 moadithyl-2-methylbenzenesulfonamide 28. I got Ogi. (Melting point 146.5~1
(47.5°C) yield was 95.9%.

実施例2.〜5゜ 第1表に示した出発原料を用いた以外は、実施列1.と
同様に操作して第1表に示す結果を得た。
Example 2. ~5° Example row 1 except that the starting materials shown in Table 1 were used. The results shown in Table 1 were obtained by operating in the same manner as above.

第  1  表 〔発明の効果〕 本発IJI実施することにより、医薬、農薬中間原料と
して有用な2−アルキル−5−ハロアセチルベンゼンス
ルホンアミド1!:尚収率で得ることができる。
Table 1 [Effects of the Invention] By carrying out IJI of the present invention, 2-alkyl-5-haloacetylbenzenesulfonamide 1, which is useful as an intermediate raw material for medicines and agricultural chemicals, is produced! : It can be obtained with a good yield.

出願人  製鉄化学工業株式会社 代表者 佐々木  浩Applicant: Steel Chemical Industry Co., Ltd. Representative Hiroshi Sasaki

Claims (4)

【特許請求の範囲】[Claims] (1)一般式( I ) ▲数式、化学式、表等があります▼(ここにRは C_1〜C_5のアルキル基を示す。)で表わされる5
−アセチル−2−アルキルベンゼンスルホンアミドを低
級アルコール中でハロゲン化することを特徴とする一般
式(II) ▲数式、化学式、表等があります▼(ここにX はCl、Br、I、RはC_1〜C_5のアルキル基を
示す。)で表わされる2−アルキル−5−ハロアセチル
ベンゼンスルホンアミドの製造法。
(1) General formula (I) ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (Here, R represents an alkyl group of C_1 to C_5.) 5
General formula (II) characterized by halogenating -acetyl-2-alkylbenzenesulfonamide in a lower alcohol ▲ Numerical formulas, chemical formulas, tables, etc. are included ▼ (where X is Cl, Br, I, R is C_1 ~C_5 represents an alkyl group.) A method for producing 2-alkyl-5-haloacetylbenzenesulfonamide represented by:
(2)低級アルコールが、メタノールである特許請求の
範囲(1)記載の方法。
(2) The method according to claim (1), wherein the lower alcohol is methanol.
(3)一般式( I ) ▲数式、化学式、表等があります▼のRがCH_3 である特許請求の範囲(1)記載の方法。(3) General formula (I) ▲There are mathematical formulas, chemical formulas, tables, etc.▼R is CH_3 The method according to claim (1). (4)一般式(II) ▲数式、化学式、表等があります▼のRがCH_3、 XがBrである特許請求の範囲(1)記載の方法。(4) General formula (II) ▲There are mathematical formulas, chemical formulas, tables, etc.▼R is CH_3, The method according to claim (1), wherein X is Br.
JP19647084A 1984-05-15 1984-09-18 Preparation of 2-alkyl-5-haloacetylbenzene sulfonamide Granted JPS6172744A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP19647084A JPS6172744A (en) 1984-09-18 1984-09-18 Preparation of 2-alkyl-5-haloacetylbenzene sulfonamide
DE8585105921T DE3564569D1 (en) 1984-05-15 1985-05-14 Process for preparing 2-alkyl-5-haloacetylbenzenesulfonamide
EP85105921A EP0162404B1 (en) 1984-05-15 1985-05-14 Process for preparing 2-alkyl-5-haloacetylbenzenesulfonamide
US07/178,833 US4853158A (en) 1984-05-15 1988-03-25 Process for preparing N,N-dialkylaniline salt of 5-acetyl-2-alkylbenzene sulfonic acid
US07/328,388 US4943655A (en) 1984-05-15 1989-03-24 Salt of 5-acetyl-2-alkylbenzenesulfonic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19647084A JPS6172744A (en) 1984-09-18 1984-09-18 Preparation of 2-alkyl-5-haloacetylbenzene sulfonamide

Publications (2)

Publication Number Publication Date
JPS6172744A true JPS6172744A (en) 1986-04-14
JPS6346066B2 JPS6346066B2 (en) 1988-09-13

Family

ID=16358336

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19647084A Granted JPS6172744A (en) 1984-05-15 1984-09-18 Preparation of 2-alkyl-5-haloacetylbenzene sulfonamide

Country Status (1)

Country Link
JP (1) JPS6172744A (en)

Also Published As

Publication number Publication date
JPS6346066B2 (en) 1988-09-13

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