JPS642108B2 - - Google Patents

Info

Publication number
JPS642108B2
JPS642108B2 JP55032368A JP3236880A JPS642108B2 JP S642108 B2 JPS642108 B2 JP S642108B2 JP 55032368 A JP55032368 A JP 55032368A JP 3236880 A JP3236880 A JP 3236880A JP S642108 B2 JPS642108 B2 JP S642108B2
Authority
JP
Japan
Prior art keywords
lower alkyl
alkyl group
formula
general formula
malonic acid
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
Application number
JP55032368A
Other languages
Japanese (ja)
Other versions
JPS56128773A (en
Inventor
Tsutomu Irikura
Seigo Suzue
Hiroshi Koga
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.)
Kyorin Pharmaceutical Co Ltd
Original Assignee
Kyorin Pharmaceutical 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 Kyorin Pharmaceutical Co Ltd filed Critical Kyorin Pharmaceutical Co Ltd
Priority to JP3236880A priority Critical patent/JPS56128773A/en
Publication of JPS56128773A publication Critical patent/JPS56128773A/en
Publication of JPS642108B2 publication Critical patent/JPS642108B2/ja
Granted legal-status Critical Current

Links

Description

【発明の詳細な説明】 本発明は、抗菌剤として有用なキノロンカルボ
ン酸誘導体の合成中間体として有用であるアニリ
ノメチレンマロン酸エステル誘導体およびその製
法に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anilinomethylene malonic acid ester derivative useful as a synthetic intermediate for quinolone carboxylic acid derivatives useful as antibacterial agents, and a method for producing the same.

本発明者らは、先に下記の一般式()で表わ
されるキノロンカルボン酸誘導体が顕著な抗菌活
性を有することを見い出した。
The present inventors previously discovered that a quinolone carboxylic acid derivative represented by the following general formula () has significant antibacterial activity.

〔式中R4は低級アルキル基(該基はヒドロキ
シ基、ハロゲン原子、フエニル基で置換されてい
てもよい。また不飽和結合を有していてもよい)
を示し、R5は水素、低級アルキル基、アシル基
を示す。X,X1は水素又はハロゲン原子を示す
が、同時に水素を表わすことはない〕 本発明の一般式()で表わされるアニリノメ
チレンマロン酸エステル誘導体は (式中R1低級アルキル基を示し、R2は低級ア
ルキル基、アシル基を示しX,X1は前述と同様
の意味を有する) 一般式()で表わされるキノロンカルボン酸
誘導体の有用な合成中間体であり、下記式に従つ
て一般式()の化合物へ導くことができる。
[In the formula, R 4 is a lower alkyl group (the group may be substituted with a hydroxy group, a halogen atom, or a phenyl group. It may also have an unsaturated bond)
and R 5 represents hydrogen, a lower alkyl group, or an acyl group. X and X 1 represent hydrogen or halogen atoms, but do not represent hydrogen at the same time.] The anilinomethylene malonic acid ester derivative represented by the general formula () of the present invention is (In the formula, R 1 represents a lower alkyl group, R 2 represents a lower alkyl group or an acyl group, and X and X 1 have the same meanings as above.) Useful synthesis of quinolone carboxylic acid derivatives represented by the general formula () It is an intermediate and can be led to the compound of general formula () according to the following formula.

(式中R1,R2,R4,R5,X,X1は前記と同様
の意味を有する。X2は脱離基を示す) 本発明の一般式()の化合物は、一般式
() (式中R2,X,X1は前記と同様の意味を有す
る) で表わされるアニリン誘導体と、一般式() R3OCH=C(COOR12 () (式中R1は前述と同様の意味を有する。R3
低級アルキル基を示す。) で表わされるマロン酸誘導体とを反応させること
によつて合成される。本反応は無溶媒下、または
不活性溶媒の存在下(本発明に於ける不活性溶媒
とは、エタノール等のアルコール類、ベンゼン、
トルエンのような芳香族炭化水素、ジクロロエタ
ン、クロロホルムのようなハロゲン化炭化水素、
テトラヒドロフラン、ジオキサンのようなエーテ
ル類、アセトニトリル、ジメチルホルムアミドの
ような非プロトン性、極性溶媒、あるいはこれら
の混合溶媒を意味する)室温〜180℃の範囲内で
行なう方が望ましい。
(In the formula, R 1 , R 2 , R 4 , R 5 , X, and X 1 have the same meanings as above. X 2 represents a leaving group) () (In the formula, R 2 , X, and X 1 have the same meanings as above.) An aniline derivative represented by the general formula ( ) It has the same meaning. R 3 represents a lower alkyl group.) It is synthesized by reacting with a malonic acid derivative represented by: This reaction is carried out without solvent or in the presence of an inert solvent (in the present invention, inert solvents include alcohols such as ethanol, benzene,
Aromatic hydrocarbons such as toluene, halogenated hydrocarbons such as dichloroethane, chloroform,
It is preferable to carry out the reaction at a temperature ranging from room temperature to 180°C (meaning an ether such as tetrahydrofuran or dioxane, an aprotic or polar solvent such as acetonitrile or dimethylformamide, or a mixed solvent thereof).

以下、実施例を挙げて具体的に説明するが、本
発明に使用する原料が新規物質であるので、その
製法を含めて記載する。
Hereinafter, the present invention will be specifically explained with reference to examples, but since the raw material used in the present invention is a new substance, the method for producing it will also be described.

実施例 O―フルオロフエニルピペラジン11.4g、無水
酢酸12.9g及びN,N―ジメチルホルムアミド10
mlの混合物を80〜90℃で1時間撹拌した。溶媒留
去後、氷水を加え、炭酸カリウムで塩基性にし、
ジクロロメタンで抽出し、乾燥後、溶媒を留去し
た。残油を減圧蒸留し、12.3gのN―アセチル―
O―フルオロフエニルピペラジンを得た。bp:
185℃/6mmHg 元素分析値 (C12H15ON2Fとして) C H N 計算値(%) 64.85 6.80 12.60 実測値(%) 64.47 6.83 12.54 以上で得られたN―アセチル―O―フルオロフ
エニルピペラジン12gを25℃以下で濃硫酸40mlに
とかし、5〜10℃に冷却しながら60%硝酸4.2ml
及び濃硫酸5mlの混合液を滴下した。10℃以下で
2時間撹拌後、氷中に加え、濃アンモニア水でPH
4にした。ベンゼンで抽出し乾燥後溶媒を留去し
た。酸渣をエタノールから再結晶し、黄色結晶と
して6.3gの1―アセチル―4―(2―フルオロ―
5―ニトロフエニル)ピペラジンを得た。mp:
132〜134℃ 元素分析値 (C12H14O3N3Fとして) C H N 計算値(%) 53.93 5.28 15.72 実測値(%) 53.91 5.26 15.69 以上で得られた1―アセチル―4―(2―フル
オロ―5―ニトロフエニル)ピペラジン6.0gを
100mlのエタノールに溶かし、10%pd/C 2gを
加え撹拌しながら水素を1.6吸収させた。触媒
を去し、エタノールを留去した。残渣をベンゼ
ンから再結晶し、無色結晶として5.3gの4―フル
オロ―3―(4―アセチル―1―ピペラジニル)
アニリンを得た。
Example 11.4 g O-fluorophenylpiperazine, 12.9 g acetic anhydride and 10 N,N-dimethylformamide
ml of the mixture was stirred at 80-90°C for 1 hour. After evaporating the solvent, add ice water and make basic with potassium carbonate.
After extraction with dichloromethane and drying, the solvent was distilled off. Distill the residual oil under reduced pressure to obtain 12.3g of N-acetyl-
O-fluorophenylpiperazine was obtained. bp:
185℃/6mmHg Elemental analysis value (as C 12 H 15 ON 2 F) C H N Calculated value (%) 64.85 6.80 12.60 Actual value (%) 64.47 6.83 12.54 N-acetyl-O-fluorophenyl obtained above Dissolve 12g of piperazine in 40ml of concentrated sulfuric acid at below 25°C, and then cool to 5-10°C with 4.2ml of 60% nitric acid.
A mixed solution of 5 ml of concentrated sulfuric acid and 5 ml of concentrated sulfuric acid was added dropwise. After stirring at 10℃ or less for 2 hours, add to ice and PH with concentrated ammonia water.
I gave it a 4. After extraction with benzene and drying, the solvent was distilled off. The acid residue was recrystallized from ethanol to give 6.3 g of 1-acetyl-4-(2-fluoro-
5-nitrophenyl)piperazine was obtained. mp:
132-134℃ Elemental analysis value (as C 12 H 14 O 3 N 3 F) C H N Calculated value (%) 53.93 5.28 15.72 Actual value (%) 53.91 5.26 15.69 1-Acetyl-4-( 6.0g of 2-fluoro-5-nitrophenyl)piperazine
It was dissolved in 100ml of ethanol, 2g of 10% PD/C was added, and 1.6% of hydrogen was absorbed with stirring. The catalyst was removed and ethanol was distilled off. The residue was recrystallized from benzene to give 5.3 g of 4-fluoro-3-(4-acetyl-1-piperazinyl) as colorless crystals.
Obtained aniline.

mp:132℃ 元素分析値 (C12H16ON3Fとして) C H N 計算値(%) 60.74 6.80 17.71 実測値(%) 60.62 6.86 17.73 以上で得られた4―フルオロ―3―(4―アセ
チル―1―ピペラジニル)アニリン4.8g及びエト
キシメチレンマロン酸ジエチルエステル4.3gの混
合物を120〜130℃で2時間反応させた。生成した
油状物をアルミナカラムクロマイトグラフイーで
ジクロロメタンを展開液として精製し、無色非晶
性固体として7.7gのN―(2,2―ジエトキシカ
ルボニルビニル)―4―フルオロ―3―(4―ア
セチル―1―ピペラジニル)アニリンを得た。
mp: 132℃ Elemental analysis value (as C 12 H 16 ON 3 F) C H N Calculated value (%) 60.74 6.80 17.71 Actual value (%) 60.62 6.86 17.73 4-Fluoro-3-(4- A mixture of 4.8 g of acetyl-1-piperazinyl)aniline and 4.3 g of ethoxymethylene malonic acid diethyl ester was reacted at 120 to 130°C for 2 hours. The resulting oil was purified by alumina column chromatography using dichloromethane as a developing solution to obtain 7.7 g of N-(2,2-diethoxycarbonylvinyl)-4-fluoro-3-(4-) as a colorless amorphous solid. Acetyl-1-piperazinyl)aniline was obtained.

元素分析値 (C20H26O5N3Fとして) C H N 計算値(%) 58.96 6.43 10.31 実測値(%) 58.75 6.55 10.23Elemental analysis value (as C 20 H 26 O 5 N 3 F) C H N Calculated value (%) 58.96 6.43 10.31 Actual value (%) 58.75 6.55 10.23

Claims (1)

【特許請求の範囲】 1 一般式 (式中R1は低級アルキル基を示し、R2は低級
アルキル基、アシル基を示す。X,X1は水素又
はハロゲン原子を示すが、同時に水素を表わすこ
とはない) で表わされるアニリノメチレンマロン酸エステル
誘導体。 2 一般式 (式中R2は低級アルキル基、アシル基を示し、
X,X1は水素又はハロゲン原子を示すが、同時
に水素を表わすことはない。) で表わされるアニリン誘導体と 一般式 R3OCH=C(COOR12 (式中R1は低級アルキル基を示し、R3も低級
アルキル基を示す。) で表わされるマロン酸誘導体とを反応させること
を特徴とする一般式 で表わされるアニリノメチレンマロン酸エステル
誘導体の製法。
[Claims] 1. General formula (In the formula, R 1 represents a lower alkyl group, R 2 represents a lower alkyl group or an acyl group. Methylene malonic acid ester derivative. 2 General formula (In the formula, R 2 represents a lower alkyl group or an acyl group,
X and X 1 represent hydrogen or halogen atoms, but do not represent hydrogen at the same time. ) and a malonic acid derivative represented by the general formula R 3 OCH=C(COOR 1 ) 2 (in the formula, R 1 represents a lower alkyl group, and R 3 also represents a lower alkyl group). A general formula characterized by A method for producing an anilinomethylene malonic acid ester derivative represented by
JP3236880A 1980-03-14 1980-03-14 Anilinomethylenemalonic ester derivative and its preparation Granted JPS56128773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3236880A JPS56128773A (en) 1980-03-14 1980-03-14 Anilinomethylenemalonic ester derivative and its preparation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3236880A JPS56128773A (en) 1980-03-14 1980-03-14 Anilinomethylenemalonic ester derivative and its preparation

Publications (2)

Publication Number Publication Date
JPS56128773A JPS56128773A (en) 1981-10-08
JPS642108B2 true JPS642108B2 (en) 1989-01-13

Family

ID=12356997

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3236880A Granted JPS56128773A (en) 1980-03-14 1980-03-14 Anilinomethylenemalonic ester derivative and its preparation

Country Status (1)

Country Link
JP (1) JPS56128773A (en)

Also Published As

Publication number Publication date
JPS56128773A (en) 1981-10-08

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