JPH05286947A - Nitrobenzoic acid derivative - Google Patents

Nitrobenzoic acid derivative

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Publication number
JPH05286947A
JPH05286947A JP8684992A JP8684992A JPH05286947A JP H05286947 A JPH05286947 A JP H05286947A JP 8684992 A JP8684992 A JP 8684992A JP 8684992 A JP8684992 A JP 8684992A JP H05286947 A JPH05286947 A JP H05286947A
Authority
JP
Japan
Prior art keywords
methyl
piperazine
formula
ethyl ester
compound
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
JP8684992A
Other languages
Japanese (ja)
Inventor
Yukari Kohama
ゆかり 小濱
Tsuneshi Hijiguro
恒志 肱黒
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.)
Terumo Corp
Original Assignee
Terumo Corp
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 Terumo Corp filed Critical Terumo Corp
Priority to JP8684992A priority Critical patent/JPH05286947A/en
Publication of JPH05286947A publication Critical patent/JPH05286947A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To provide the subject new compound having N-methyl-D-aspartic acid receptor antagonistic activity, thus useful as a medicine for Huntington's chorea, epilepsia, senile dementia, etc. CONSTITUTION:The objective compound of formula I (R1 and R2 are each H or lower alkyl; R3 is H, halogen, alkoxy, aryloxy or nitro), e.g. 4-[(2- methoxycarbonyl-4-nitrophenyl) methyl] piperazine-2-carboxylic ethyl ester. The compound of the formula I can be obtained by condensation reaction between a piperazine-2-carboxylic alkyl ester of formula II and a substituted benzyl halide of formula III (X is Cl or Br) in an anhydrous solvent (e.g. methylene chloride) in the presence of a base (e.g. triethylamine). For the dose, this compound is administered at 0.1-200mg/day/adult in one to three portions.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、新規なニトロ安息香酸
誘導体に関する。さらに詳細には、顕著なNMDA(N
−メチル−D−アスパラギン酸)受容体拮抗作用を有
し、医薬品として有用な新規ニトロ安息香酸誘導体、並
びに薬理学上許容される塩に関する。
FIELD OF THE INVENTION The present invention relates to a novel nitrobenzoic acid derivative. More specifically, the remarkable NMDA (N
-Methyl-D-aspartic acid) receptor antagonism, and a novel nitrobenzoic acid derivative useful as a medicine and a pharmacologically acceptable salt.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】脊椎動
物の脳・脊髄では、グルタミン酸、アスパラギン酸等の
興奮性アミノ酸が神経伝達物質として重要な役割を果た
している。その受容体としては少なくともNMDA(N
−メチル−D−アスパラギン酸)タイプ、キスカル酸タ
イプ、及び、カイニン酸タイプの3種があるとされてい
るが、そのうちNMDA受容体の拮抗剤がハンチントン
(Huntington)舞踏病、癲癇、老人性痴呆
症、または酸素欠乏症の後に見られる精神及び運動の不
全症に効果があることが明らかにされている(ジョーン
ズ(A.Jones)ら,ニューロサイエンス レター
(Neurosci.Lett.),45,157−6
1(1984)、マクゲール(E.G.McGeer)
ら,ネイチャー(Nature),263,517−1
9(1976)、サイモン(R.Simon)ら,サイ
エンス(Science),226,850−2(19
84))。
BACKGROUND OF THE INVENTION Excitatory amino acids such as glutamic acid and aspartic acid play important roles as neurotransmitters in the vertebrate brain and spinal cord. At least NMDA (N
-Methyl-D-aspartic acid) type, quisqualic acid type, and kainic acid type, among which NMDA receptor antagonists are Huntington's chorea, epilepsy, and senile dementia. Has been shown to be effective in psychiatric disorders, or mental and motor deficits seen after anoxia (A. Jones, et al., Neuroscience Letter. 45 , 157-6.
1 (1984), McGale (EG McGeer)
Et al., Nature, 263 , 517-1.
9 (1976), Simon (R. Simon) et al., Science (Science), 226 , 850-2 (19).
84)).

【0003】本発明者らは、NMDA(N−メチル−D
−アスパラギン酸)受容体に対する拮抗作用を持つ安息
香酸誘導体としてピペラジン誘導体(平成2年特許願3
29581号)を見いだしたが、膜透過性、活性などの
諸特性に問題を残していた。
The present inventors have found that NMDA (N-methyl-D
-Aspartic acid) piperazine derivative as a benzoic acid derivative having an antagonistic action (Patent application 3 in 1990)
No. 29581) was found, but problems remained in various properties such as membrane permeability and activity.

【0004】[0004]

【課題を解決するための手段】本発明者らは、上記の問
題を解決するために鋭意検討を行った結果、下記一般式
化2に示す新規ニトロ安息香酸誘導体に強力なN−メチ
ル−D−アスパラギン酸(以下、NMDAとする)受容
体拮抗作用を見いだし、本発明を完成した。
Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that the novel nitrobenzoic acid derivative represented by the following general formula 2 is a strong N-methyl-D. -Aspartic acid (hereinafter referred to as NMDA) receptor antagonism was found to complete the present invention.

【0005】すなわち、上記課題を解決する本発明は、
下記一般式化2(式中、R1、R2はそれぞれ水素原子ま
たは低級アルキル基を示し、R3は水素原子、ハロゲ
ン、アルコキシ基、アリールオキシ基、またはニトロ基
を表わす。)で示される新規なニトロ安息香酸誘導体、
及び薬理学上許容される塩である。
That is, the present invention for solving the above problems is
Formula 2 below (in the formula, R 1 and R 2 each represent a hydrogen atom or a lower alkyl group, and R 3 represents a hydrogen atom, a halogen, an alkoxy group, an aryloxy group, or a nitro group). Novel nitrobenzoic acid derivative,
And a pharmacologically acceptable salt.

【0006】[0006]

【化2】 [Chemical 2]

【0007】また、上記課題を解決する本発明は、上記
一般式化2で示されるニトロ安息香酸誘導体を含有する
NMDA受容体拮抗剤である。
The present invention which solves the above-mentioned problems is an NMDA receptor antagonist containing a nitrobenzoic acid derivative represented by the above general formula 2.

【0008】以上、本発明を詳細に説明する。The present invention will be described in detail above.

【0009】本発明の上記一般式化2で示されるニトロ
安息香酸誘導体は、塩化メチレン、ジメチルホルムアミ
ド(DMF)等の無水溶媒中、トリエチルアミン等の有
機塩基の存在下、下記一般式化3(式中、R2は水素原
子または低級アルキル基を表わす。)で示される、ピペ
ラジン−2−カルボン酸アルキルエステルと、下記一般
式化4(式中、R1は水素原子または低級アルキル基を
示し、R3は水素原子、ハロゲン、アルコキシ基、アリ
ールオキシ基またはニトロ基を示し、Xは、クロム基ま
たはブロム基を表わす。)で示される、置換ベンジルハ
ライドとの縮合反応等により合成できる。
The nitrobenzoic acid derivative represented by the above general formula 2 of the present invention has the following general formula 3 (formula 3) in the presence of an organic base such as triethylamine in an anhydrous solvent such as methylene chloride or dimethylformamide (DMF). Wherein R 2 represents a hydrogen atom or a lower alkyl group), and a piperazine-2-carboxylic acid alkyl ester represented by the following general formula 4 (in the formula, R 1 represents a hydrogen atom or a lower alkyl group, R 3 represents a hydrogen atom, a halogen, an alkoxy group, an aryloxy group or a nitro group, and X represents a chromium group or a bromine group), and can be synthesized by a condensation reaction with a substituted benzyl halide.

【0010】[0010]

【化3】 [Chemical 3]

【0011】[0011]

【化4】 [Chemical 4]

【0012】下記の各実施例に記載されていない本発明
の化合物についても同様な方法を用いて合成することが
できる。
The compounds of the present invention not described in each of the following examples can be synthesized by the same method.

【0013】上記一般式化2に示されるニトロ安息香酸
誘導体はNMDA受容体拮抗剤、及び、NMDA受容体
の拮抗に応答する疾患を予防、または治療するための医
薬製剤として使用するとき、投与量は症状により異なる
が、一般に成人一日量0.1〜200mg、好ましくは
1〜100mgであり、症状に応じて必要により1〜3
回に分けて投与するのが良い。投与方法は投与に適した
任意の形態をとることができ、特に経口投与が望ましい
が、静脈内投与も可能である。
The nitrobenzoic acid derivative represented by the above general formula 2 is used in a dosage amount when used as an NMDA receptor antagonist and a pharmaceutical preparation for preventing or treating a disease which responds to NMDA receptor antagonism. Although it varies depending on the symptom, the daily dose for an adult is generally 0.1 to 200 mg, preferably 1 to 100 mg.
It is recommended to administer in divided doses. The administration method can be any form suitable for administration, and oral administration is particularly preferable, but intravenous administration is also possible.

【0014】本発明に用いられる化合物は有効成分、も
しくは有効成分のの一つとして単独、または公知の製剤
技術によって製剤担体と混合され、錠剤、散剤、カプセ
ル剤、顆粒剤、シロップ剤、水剤、懸濁剤、注射剤、点
眼剤、もしくは座剤などの投与に適した任意の製剤形態
をとることができる。
The compound used in the present invention is an active ingredient, or as one of the active ingredients, alone or mixed with a pharmaceutical carrier by a known pharmaceutical technique, and is used as tablets, powders, capsules, granules, syrups, liquids. , A suspension, an injection, an eye drop, a suppository, or the like can be used in any form suitable for administration.

【0015】具体的な製剤担体としては、澱粉類、乳
糖、ショ糖、メチルセルロース、カルボキシメチルセル
ロース、結晶セルロース、アルギン酸ナトリウム、リン
酸水素カルシウム、メタケイ酸アルミン酸マグネシウ
ム、無水ケイ酸、及び合成ケイ酸アルミニウム等の賦形
剤、ヒドロキシプロピルセルロース、ヒドロキシプロピ
ルメチルセルロース、ゼラチン、及びポリビニルピロリ
ドン等の結合剤、カルボキシメチルセルロースカルシウ
ム、架橋カルボキシメチルセルロースナトリウム、及び
架橋ポリビニルピロリドン等の崩壊剤、ステアリン酸マ
グネシウム、及びタルク等の滑沢剤、セルロースアセテ
ートフタレート、ヒドロキシプロピルメチルセルロース
アセテートサクシネート、メタアクリル酸、及びメタア
クリル酸メチルコーポリマー等の被覆剤、ポリエチレン
グリコール等の溶解補助剤、ラウリル硫酸ナトリウム、
レシチン、ソルビタンモノオレエート、ポリオキシエチ
レンセチルエーテル、ショ糖脂肪酸エステル、ポリオキ
シエチレン硬化ヒマシ油、及びグリセリルモノステアレ
ート等の乳化剤、保湿剤、カカオ脂、及びウィテブゾー
ルW35等の基剤を挙げることができる。
Specific pharmaceutical carriers include starches, lactose, sucrose, methyl cellulose, carboxymethyl cellulose, crystalline cellulose, sodium alginate, calcium hydrogen phosphate, magnesium aluminometasilicate, anhydrous silicic acid, and synthetic aluminum silicate. Excipients such as hydroxypropylcellulose, hydroxypropylmethylcellulose, gelatin, and binders such as polyvinylpyrrolidone, disintegrants such as calcium carboxymethylcellulose, crosslinked sodium carboxymethylcellulose, and crosslinked polyvinylpyrrolidone, magnesium stearate, and talc. Lubricants, cellulose acetate phthalate, hydroxypropyl methylcellulose acetate succinate, methacrylic acid, and methyl methacrylate corp. Coating agents such as mer, solubilizing agent, such as polyethylene glycol, sodium lauryl sulfate,
Recitin, sorbitan monooleate, polyoxyethylene cetyl ether, sucrose fatty acid ester, polyoxyethylene hydrogenated castor oil, and emulsifiers such as glyceryl monostearate, humectants, cacao butter, and witebsol W35 You can

【0016】次に、実施例を示して本発明を具体的に説
明するが、本発明はこれらに何ら限定されるものではな
い。
Next, the present invention will be specifically described by showing examples, but the present invention is not limited to these.

【0017】[0017]

【実施例】【Example】

(実施例1) 4−[(2−メトキシカルボニル−4−ニトロフェニ
ル)メチル]ピペラジン−2−カルボン酸エチルエステ
ルの合成法 (1) 2−メチル−5−ニトロ安息香酸980mgを
無水メタノール25ml中、濃硫酸を触媒として、24
時間加熱還流した。溶媒留去後、水を加えて塩化メチレ
ンで抽出したのち、無水硫酸ナトリウムで乾燥した。濾
過後、溶媒を減圧留去し、該残査をシリカゲルカラムク
ロマトグラフィーに付し、塩化メチレン溶出画分を濃縮
して、2−メチル−5−ニトロ安息香酸メチルエステル
808mgを油状物として得た。
Example 1 Synthesis method of 4-[(2-methoxycarbonyl-4-nitrophenyl) methyl] piperazine-2-carboxylic acid ethyl ester (1) 980 mg of 2-methyl-5-nitrobenzoic acid in 25 ml of anhydrous methanol , Using concentrated sulfuric acid as a catalyst, 24
Heated to reflux for hours. After the solvent was distilled off, water was added and the mixture was extracted with methylene chloride and then dried over anhydrous sodium sulfate. After filtration, the solvent was evaporated under reduced pressure, the residue was subjected to silica gel column chromatography, and the fraction eluted with methylene chloride was concentrated to obtain 808 mg of 2-methyl-5-nitrobenzoic acid methyl ester as an oil. ..

【0018】(2) 2−メチル−5−ニトロ安息香酸
メチルエステル400mgを四塩化炭素10mlに溶解
し、N−ブロモこはく酸イミド365mg及び過安息香
酸25mgを加えて3時間加熱撹拌し、さらに16時間
室温撹拌した。濾過後、溶媒を減圧留去し、2−ブロモ
メチル−5−ニトロ安息香酸メチルエステルの粗生成物
562mgを油状物として得た。
(2) 400 mg of 2-methyl-5-nitrobenzoic acid methyl ester was dissolved in 10 ml of carbon tetrachloride, 365 mg of N-bromosuccinimide and 25 mg of perbenzoic acid were added, and the mixture was heated and stirred for 3 hours, and further 16 Stir at room temperature for hours. After filtration, the solvent was distilled off under reduced pressure to obtain 562 mg of a crude product of 2-bromomethyl-5-nitrobenzoic acid methyl ester as an oil.

【0019】(3) ピペラジン−2−カルボン酸エチ
ルエステル237mgを塩化メチレン3mlに溶解し、
トリエチルアミン152mgの塩化メチレン溶液2ml
を加え、0℃で10分間撹拌した。上記実施例1−
(2)で得た2−ブロモメチル−5−ニトロ安息香酸メ
チルエステルの粗生成物567mgの塩化メチレン溶液
10mlを0℃下、15分間で滴下し、室温で23時間
撹拌した。水を加えて塩化メチレンで抽出した後、無水
硫酸ナトリウムで乾燥し、濾過後、溶媒を留去した。
(3) 237 mg of piperazine-2-carboxylic acid ethyl ester was dissolved in 3 ml of methylene chloride,
2 ml of a methylene chloride solution containing 152 mg of triethylamine
Was added and stirred at 0 ° C. for 10 minutes. Example 1-
10 ml of a methylene chloride solution containing 567 mg of the crude product of 2-bromomethyl-5-nitrobenzoic acid methyl ester obtained in (2) was added dropwise at 0 ° C over 15 minutes, and the mixture was stirred at room temperature for 23 hours. Water was added and the mixture was extracted with methylene chloride, dried over anhydrous sodium sulfate, filtered, and the solvent was evaporated.

【0020】該残査をシリカゲルカラムクロマトグラフ
ィーに付し、クロロホルム:メタノール=50:1溶出
画分を濃縮して、4−[(2−メトキシカルボニル−4
−ニトロフェニル)メチル]ピペラジン−2−カルボン
酸エチルエステル331mgを油状物として得た。
The residue was subjected to silica gel column chromatography, and the fraction eluted with chloroform: methanol = 50: 1 was concentrated to give 4-[(2-methoxycarbonyl-4
331 mg of -nitrophenyl) methyl] piperazine-2-carboxylic acid ethyl ester was obtained as an oil.

【0021】当該化合物の分光学的データは下記式化5
の構造を支持する。
The spectroscopic data of the compound is represented by the following formula:
Support the structure of.

【0022】[0022]

【化5】 [Chemical 5]

【0023】1H−NMR(CDCl3) δ(ppm) 1.20(3H,t,J=7.0Hz),2.50(1
H,s),2.10−3.13(6H,m),3.37
−3.63(1H,m),3.80−4.00(2H,
m),3.93(3H,s),4.15(2H,q,J
=7.0Hz),7.37−8.60(3H,m)
1 H-NMR (CDCl 3 ) δ (ppm) 1.20 (3 H, t, J = 7.0 Hz), 2.50 (1
H, s), 2.10-3.13 (6H, m), 3.37.
-3.63 (1H, m), 3.80-4.00 (2H,
m), 3.93 (3H, s), 4.15 (2H, q, J
= 7.0 Hz), 7.37-8.60 (3H, m)

【0024】(実施例2) 4−[(2−カルボキシ−4−ニトロフェニル)メチ
ル]ピペラジン−2−カルボン酸 二塩酸塩の合成法 4−[(2−メトキシカルボニル−4−ニトロフェニ
ル)メチル]ピペラジン−2−カルボン酸エチルエステ
ル331mgのメタノール溶液5mlに、2規定水酸化
ナトリウム水溶液0.94mlを加え、室温で20時間
撹拌した後、1.5時間加熱還流した。溶媒を減圧留去
したのち、1規定塩酸を加えてpH3として濃縮した。
Example 2 Synthesis method of 4-[(2-carboxy-4-nitrophenyl) methyl] piperazine-2-carboxylic acid dihydrochloride 4-[(2-methoxycarbonyl-4-nitrophenyl) methyl ] To a solution of 331 mg of piperazine-2-carboxylic acid ethyl ester in methanol (5 ml) was added 2N aqueous sodium hydroxide solution (0.94 ml), the mixture was stirred at room temperature for 20 hours, and then heated under reflux for 1.5 hours. After the solvent was distilled off under reduced pressure, 1N hydrochloric acid was added to adjust the pH to 3, and the mixture was concentrated.

【0025】該残査にエタノールを加え、濾過後、溶媒
を減圧留去して、4−[(2−カルボキシ−4−ニトロ
フェニル)メチル]ピペラジン−2−カルボン酸 二塩
酸塩360mgを固形物として得た。
Ethanol was added to the residue, and after filtration, the solvent was distilled off under reduced pressure to give 360 mg of 4-[(2-carboxy-4-nitrophenyl) methyl] piperazine-2-carboxylic acid dihydrochloride as a solid. Got as.

【0026】当該化合物の分光学的データは、下記式化
6の構造を支持する。
Spectroscopic data for the compound supports the structure of Formula 6 below.

【0027】[0027]

【化6】 [Chemical 6]

【0028】1H−NMR(D2O) δ(ppm) 3.38−4.05(6H,m),4.21−4.52
(1H,m),4.82(2H,s),7.45−8.
98(3H,m)
1 H-NMR (D 2 O) δ (ppm) 3.38-4.05 (6H, m), 4.21-4.52
(1H, m), 4.82 (2H, s), 7.45-8.
98 (3H, m)

【0029】(実施例3) 4−[(2−メトキシカルボニル−6−ニトロフェニ
ル)メチル]ピペラジン−2−カルボン酸エチルエステ
ルの合成法 (1) 実施例1−(1)と同様の手法により、2−メ
チル−3−ニトロ安息香酸3.00g、無水メタノール
30ml及び触媒量の濃硫酸を用いて、2−メチル−3
−ニトロ安息香酸メチルエステル1.39gを固形物と
して得た。
Example 3 Synthesis method of 4-[(2-methoxycarbonyl-6-nitrophenyl) methyl] piperazine-2-carboxylic acid ethyl ester (1) By the same method as in Example 1- (1). 2-methyl-3-nitrobenzoic acid (3.00 g), anhydrous methanol (30 ml) and a catalytic amount of concentrated sulfuric acid were used to prepare 2-methyl-3.
-1.39 g of methyl nitrobenzoate was obtained as a solid.

【0030】(2) 実施例1−(2)と同様の手法に
より、2−メチル−3−ニトロ安息香酸メチルエステル
505mg、N−ブロモこはく酸イミド484mg及び
過安息香酸31mgを用い、四塩化炭素10mlを溶媒
として、2−ブロモメチル−3−ニトロ安息香酸の粗生
成物710mgを油状物として得た。
(2) Carbon tetrachloride was prepared in the same manner as in Example 1- (2), using 505 mg of 2-methyl-3-nitrobenzoic acid methyl ester, 484 mg of N-bromosuccinimide and 31 mg of perbenzoic acid. Using 10 ml as a solvent, 710 mg of a crude product of 2-bromomethyl-3-nitrobenzoic acid was obtained as an oil.

【0031】(3) 実施例1−(3)と同様の手法に
より、ピペラジン−2−カルボン酸エチルエステル41
0mg、トリエチルアミン262mg及び実施例2−
(2)で得た2−ブロモメチル−3−ニトロ安息香酸メ
チルエステルの粗生成物710mgを用い、塩化メチレ
ン18mlを溶媒として、4−[(2−メトキシカルボ
ニル−6−ニトロフェニル)メチル]ピペラジン−2−
カルボン酸エチルエステル504mgを油状物として得
た。
(3) Piperazine-2-carboxylic acid ethyl ester 41 was prepared in the same manner as in Example 1- (3).
0 mg, triethylamine 262 mg and Example 2-
Using 710 mg of the crude product of 2-bromomethyl-3-nitrobenzoic acid methyl ester obtained in (2), using 18 ml of methylene chloride as a solvent, 4-[(2-methoxycarbonyl-6-nitrophenyl) methyl] piperazine- 2-
504 mg of carboxylic acid ethyl ester was obtained as an oil.

【0032】当該化合物の分光学的データは下記式化7
の構造を支持する。
The spectroscopic data of the compound is represented by the following formula 7.
Support the structure of.

【0033】[0033]

【化7】 [Chemical 7]

【0034】1H−NMR(CDCl3) δ(ppm) 1.18(3H,t,J=7.0Hz),1.98−
3.17(7H,m),3.22−3.53(1H,
m),3.83(2H,s),3.88(3H,s),
4.10(2H,q,J=7.0Hz),7.17−
7.83(3H,m)
1 H-NMR (CDCl 3 ) δ (ppm) 1.18 (3 H, t, J = 7.0 Hz), 1.98-
3.17 (7H, m), 3.22-3.53 (1H,
m), 3.83 (2H, s), 3.88 (3H, s),
4.10 (2H, q, J = 7.0Hz), 7.17-
7.83 (3H, m)

【0035】(実施例4) 4−[(2−カルボキシ−6−ニトロフェニル)メチ
ル]ピペラジン−2−カルボン酸 二塩酸塩の合成法 実施例2と同様の手法により、4−[(2−メトキシカ
ルボニル−6−ニトロフェニル)メチル]ピペラジン−
2−カルボン酸エチルエステル504mg、二規定水酸
化ナトリウム水溶液1.44mlを用い、メタノール1
5ml−水10mlを溶媒として、4−[(2−カルボ
キシ−6−ニトロフェニル)メチル]ピペラジン−2−
カルボン酸 二塩酸塩550mgを固形物として得た。
(Example 4) Synthesis of 4-[(2-carboxy-6-nitrophenyl) methyl] piperazine-2-carboxylic acid dihydrochloride By the same method as in Example 2, 4-[(2- Methoxycarbonyl-6-nitrophenyl) methyl] piperazine-
Using 2-carboxylic acid ethyl ester (504 mg) and a 2N aqueous sodium hydroxide solution (1.44 ml), methanol 1
5 ml-10 ml of water as a solvent, 4-[(2-carboxy-6-nitrophenyl) methyl] piperazine-2-
Obtained 550 mg of carboxylic acid dihydrochloride as a solid.

【0036】当該化合物の分光学的データは、下記式化
8の構造を支持する。
Spectroscopic data for the compound supports the structure of Formula 8 below.

【0037】[0037]

【化8】 [Chemical 8]

【0038】1H−NMR(D2O) δ(ppm) 2.98−4.02(6H,m),4.25−4.55
(1H,m),4.68(2H,s),7.32−8.
15(3H,m)
1 H-NMR (D 2 O) δ (ppm) 2.98-4.02 (6H, m), 4.25-4.55
(1H, m), 4.68 (2H, s), 7.32-8.
15 (3H, m)

【0039】(実施例5) 4−[(2,4−ジニトロ−6−メトキシカルボニルフ
ェニル)メチル]ピペラジン−2−カルボン酸エチルエ
ステルの合成法 (1) 実施例1−(1)と同様の手法により、3,5
−ジニトロ−2−メチル安息香酸3.00g、無水メタ
ノール30ml及び触媒量の濃硫酸を用いて、3,5−
ジニトロ−2−メチル安息香酸メチルエステル880m
gを固形物として得た。
Example 5 Synthesis of 4-[(2,4-dinitro-6-methoxycarbonylphenyl) methyl] piperazine-2-carboxylic acid ethyl ester (1) Same as Example 1- (1) 3,5 depending on the method
-Using 3.00 g of dinitro-2-methylbenzoic acid, 30 ml of anhydrous methanol and a catalytic amount of concentrated sulfuric acid, 3,5-
Dinitro-2-methylbenzoic acid methyl ester 880m
g was obtained as a solid.

【0040】(2) 実施例1−(2)と同様の手法に
より、3,5−ジニトロ−2−メチル安息香酸メチルエ
ステル524mg、N−ブロモこはく酸イミド407m
g及び過安息香酸26mgを用い、四塩化炭素10ml
を溶媒として、2−ブロモメチル−3,5−ジニトロ安
息香酸メチルエステルの粗生成物696mgを油状物と
して得た。
(2) In the same manner as in Example 1- (2), 3,5-dinitro-2-methylbenzoic acid methyl ester 524 mg and N-bromosuccinimide 407 m were prepared.
g and perbenzoic acid 26 mg, carbon tetrachloride 10 ml
Was used as a solvent to obtain 696 mg of a crude product of 2-bromomethyl-3,5-dinitrobenzoic acid methyl ester as an oil.

【0041】(3) 実施例1−(3)と同様の手法に
より、ピペラジン−2−カルボン酸エチルエステル34
5mg、トリエチルアミン221mg、及び実施例5−
(2)で得た2−ブロモメチル−3,5−ジニトロ安息
香酸メチルエステルの粗生成物696mgを用い、塩化
メチレン20mlを溶媒として、4−[(2,4−ジニ
トロ−6−メトキシカルボニルフェニル)メチル]ピペ
ラジン−2−カルボン酸エチルエステル74.8mgを
油状物として得た。
(3) Piperazine-2-carboxylic acid ethyl ester 34 was prepared in the same manner as in Example 1- (3).
5 mg, 221 mg triethylamine, and Example 5-
Using 696 mg of the crude product of 2-bromomethyl-3,5-dinitrobenzoic acid methyl ester obtained in (2), using 20 ml of methylene chloride as a solvent, 4-[(2,4-dinitro-6-methoxycarbonylphenyl)] 74.8 mg of methyl] piperazine-2-carboxylic acid ethyl ester was obtained as an oil.

【0042】当該化合物の分光学的データは下記式化9
の構造を支持する。
The spectroscopic data of the compound is represented by the following formula:
Support the structure of.

【0043】[0043]

【化9】 [Chemical 9]

【0044】1H−NMR(CDCl3) δ(ppm) 1.18(3H,t,J=7.0Hz),2.10−
3.00(7H,m),3.23−3.50(1H,
m),3.93(3H,s+2H,s),4.12(2
H,q,J=7.0Hz),8.40−8.70(2
H,m)
1 H-NMR (CDCl 3 ) δ (ppm) 1.18 (3 H, t, J = 7.0 Hz), 2.10-
3.00 (7H, m), 3.23-3.50 (1H,
m), 3.93 (3H, s + 2H, s), 4.12 (2
H, q, J = 7.0 Hz), 8.40-8.70 (2
H, m)

【0045】(実施例6) 4−[(2−カルボキシ−4,6−ジニトロフェニル)
メチル]ピペラジン−2−カルボン酸 二塩酸塩の合成
法 実施例2と同様の手法により、4−[(2,4−ジニト
ロ−6−メトキシカルボニルフェニル)メチル]ピペラ
ジン−2−カルボン酸エチルエステル74.8mg、二
規定水酸化ナトリウム水溶液0.19mlを用い、メタ
ノール5ml−水5mlを溶媒として、4−[(2−カ
ルボキシ−4,6−ジニトロフェニル)メチル]ピペラ
ジン−2−カルボン酸 二塩酸塩71.5mgを固形物
として得た。
(Example 6) 4-[(2-carboxy-4,6-dinitrophenyl)
Synthesis Method of Methyl] piperazine-2-carboxylic Acid Dihydrochloride By the same method as in Example 2, 4-[(2,4-dinitro-6-methoxycarbonylphenyl) methyl] piperazine-2-carboxylic acid ethyl ester 74 was obtained. 0.8 mg and 0.19 ml of a 2N aqueous sodium hydroxide solution, using 5 ml of methanol-5 ml of water as a solvent, 4-[(2-carboxy-4,6-dinitrophenyl) methyl] piperazine-2-carboxylic acid dihydrochloride 71.5 mg was obtained as a solid.

【0046】当該化合物の分光学的データは、下記式化
10の構造を支持する。
Spectroscopic data for the compound supports the structure of Formula 10 below.

【0047】[0047]

【化10】 [Chemical 10]

【0048】1H−NMR(D2O) δ(ppm) 2.97−3.80(6H,m),4.17−4.65
(3H,m),8.62−8.83(2H,m)
1 H-NMR (D 2 O) δ (ppm) 2.97-3.80 (6H, m), 4.17-4.65
(3H, m), 8.62-8.83 (2H, m)

【0049】(実施例7) 4−[(5−イソアミルオキシ−2−エトキシカルボニ
ル−4−ニトロフェニル)メチル]ピペラジン−2−カ
ルボン酸エチルエステルの合成法 (1) 公知の手法により合成した、4−ヒドロキシ−
2−メチル安息香酸エチルエステル1.00gをアセト
ン20mlに溶解し、炭酸カリウム920mgを加え
た。ヨウ化イソアミル1.32gを加えた後、50℃で
24時間加温した。濾過後、濃縮して得た残査に水を加
え、酢酸エチルエステルにて抽出した。
Example 7 Synthesis method of 4-[(5-isoamyloxy-2-ethoxycarbonyl-4-nitrophenyl) methyl] piperazine-2-carboxylic acid ethyl ester (1) Synthesized by a known method. 4-hydroxy-
2-Methylbenzoic acid ethyl ester (1.00 g) was dissolved in acetone (20 ml), and potassium carbonate (920 mg) was added. After adding 1.32 g of isoamyl iodide, the mixture was heated at 50 ° C. for 24 hours. After filtration, water was added to the residue obtained by concentration, and the mixture was extracted with ethyl acetate.

【0050】有機層を無水硫酸ナトリウムにて乾燥し、
濾過後、濃縮して得た残査をシリカゲルカラムクロマト
グラフィーに付し、ヘキサン:酢酸エチルエステル=5
0:1溶出画分を濃縮して、4−イソアミルオキシ−2
−メチル安息香酸エチルエステル1.13gを油状物と
して得た。
The organic layer is dried over anhydrous sodium sulfate,
After filtration and concentration, the residue obtained was subjected to silica gel column chromatography, and hexane: acetic acid ethyl ester = 5.
The 0: 1 elution fraction was concentrated to give 4-isoamyloxy-2.
1.13 g of methyl benzoic acid ethyl ester was obtained as an oil.

【0051】(2) 4−イソアミルオキシ−2−メチ
ル安息香酸エチルエステル1.00gを塩化メチレン1
0mlに溶解し、−30〜−35℃下、濃硫酸:濃硝酸
=1:1溶液1.0mlを5分間で滴下した。さらに1
0分間撹拌したのち反応液を100mlの氷水にあけ、
塩化メチレンにて2回抽出した。有機層を飽和炭酸水素
ナトリウム水溶液にて洗い、無水硫酸ナトリウムにて乾
燥したのち、濾過して濃縮した。
(2) 4-isoamyloxy-2-methylbenzoic acid ethyl ester (1.00 g) was added to methylene chloride (1).
It was dissolved in 0 ml, and 1.0 ml of a concentrated sulfuric acid: concentrated nitric acid = 1: 1 solution was added dropwise at −30 to −35 ° C. over 5 minutes. 1 more
After stirring for 0 minutes, the reaction solution is poured into 100 ml of ice water,
It was extracted twice with methylene chloride. The organic layer was washed with saturated aqueous sodium hydrogen carbonate solution, dried over anhydrous sodium sulfate, filtered and concentrated.

【0052】該残査をシリカゲルカラムクロマトグラフ
ィーに付し、ヘキサン:酢酸エチルエステル=50:1
溶出画分を濃縮して、4−イソアミルオキシ−2−メチ
ル−5−ニトロ安息香酸エチルエステル1.12gを固
形物として得た。
The residue was subjected to silica gel column chromatography, and hexane: acetic acid ethyl ester = 50: 1.
The eluted fractions were concentrated to give 1.12 g of 4-isoamyloxy-2-methyl-5-nitrobenzoic acid ethyl ester as a solid.

【0053】(3) 実施例1−(2)と同様の手法に
より、4−イソアミルオキシ−2−メチル−5−ニトロ
安息香酸エチルエステル0.68g、N−ブロモこはく
酸イミド0.43g及び過安息香酸28mgを用い、四
塩化炭素10mlを溶媒として、2−ブロモメチル−4
−イソアミルオキシ−5−ニトロ安息香酸エチルエステ
ルの粗生成物0.94mgを固形物として得た。
(3) By the same procedure as in Example 1- (2), 0.68 g of 4-isoamyloxy-2-methyl-5-nitrobenzoic acid ethyl ester, 0.43 g of N-bromosuccinimide and a peroxycarboxylic acid Using 28 mg of benzoic acid and 10 ml of carbon tetrachloride as a solvent, 2-bromomethyl-4
0.94 mg of a crude product of -isoamyloxy-5-nitrobenzoic acid ethyl ester was obtained as a solid.

【0054】(4) 実施例1−(3)と同様の手法に
より、ピペラジン−2−カルボン酸エチルエステル36
4mg、トリエチルアミン233mg及び実施例7−
(3)で得た2−ブロモメチル−4−イソアミルオキシ
−5−ニトロ安息香酸エチルエステルの粗生成物0.9
4gを用い、塩化メチレン15mlを溶媒として、4−
[(5−イソアミルオキシ−2−エトキシカルボニル−
4−ニトロフェニル)メチル]ピペラジン−2−カルボ
ン酸エチルエステル154mgを油状物として得た。
(4) By the same procedure as in Example 1- (3), piperazine-2-carboxylic acid ethyl ester 36
4 mg, triethylamine 233 mg and Example 7-
Crude product of 2-bromomethyl-4-isoamyloxy-5-nitrobenzoic acid ethyl ester obtained in (3) 0.9
4-g, methylene chloride 15 ml as a solvent, 4-
[(5-isoamyloxy-2-ethoxycarbonyl-
154 mg of 4-nitrophenyl) methyl] piperazine-2-carboxylic acid ethyl ester was obtained as an oil.

【0055】当該化合物の分光学的データは下記式化1
1の構造を支持する。
The spectroscopic data of the compound is represented by the following formula 1.
1 support structure.

【0056】[0056]

【化11】 [Chemical 11]

【0057】1H−NMR(CDCl3) δ(ppm) 0.98(6H,d,J=6.0Hz),1.31(3
H,t,J=7.0Hz),1.33(3H,t,J=
7.0Hz),1.63−1.97(3H,m),2.
23−3.23(7H,m),3.42−3.73(1
H,m),3.92(2H,s),3.83−4.60
(6H,m),7.43(1H,s),8.33(1
H,s)
1 H-NMR (CDCl 3 ) δ (ppm) 0.98 (6 H, d, J = 6.0 Hz), 1.31 (3
H, t, J = 7.0 Hz), 1.33 (3H, t, J =
7.0 Hz), 1.63-1.97 (3H, m), 2.
23-3.23 (7H, m), 3.42-3.73 (1
H, m), 3.92 (2H, s), 3.83-4.60.
(6H, m), 7.43 (1H, s), 8.33 (1
H, s)

【0058】(実施例8) 4−[(2−カルボキシ−5−イソアミルオキシ−4−
ニトロフェニル)メチル]ピペラジン−2−カルボン酸
二塩酸塩の合成法 実施例2と同様の手法により、4−[(5−イソアミル
オキシ−2−エトキシカルボニル−4−ニトロフェニ
ル)メチル]ピペラジン−2−カルボン酸エチルエステ
ル154mg、二規定水酸化ナトリウム水溶液0.34
mlを用い、メタノール10ml−水5mlを溶媒とし
て、4−[(2−カルボキシ−5−イソアミルオキシ−
4−ニトロフェニル)メチル]ピペラジン−2−カルボ
ン酸 二塩酸塩160mgを固形物として得た。
(Example 8) 4-[(2-carboxy-5-isoamyloxy-4-
Synthesis method of nitrophenyl) methyl] piperazine-2-carboxylic acid dihydrochloride By the same method as in Example 2, 4-[(5-isoamyloxy-2-ethoxycarbonyl-4-nitrophenyl) methyl] piperazine-2 was prepared. -Carboxylic acid ethyl ester 154 mg, 2N aqueous sodium hydroxide solution 0.34
Using 10 ml of methanol and 5 ml of water as a solvent, 4-[(2-carboxy-5-isoamyloxy-
4-Nitrophenyl) methyl] piperazine-2-carboxylic acid dihydrochloride 160 mg was obtained as a solid.

【0059】当該化合物の分光学的データは、下記式化
12の構造を支持する。
Spectroscopic data for the compound supports the structure of Formula 12 below.

【0060】[0060]

【化12】 [Chemical 12]

【0061】1H−NMR(D2O) δ(ppm) 0.90(6H,d,J=5.0Hz),1.58−
1.87(3H,m),2.94−5.51(11H,
m),7.83(1H,s),8.39(1H,s)
1 H-NMR (D 2 O) δ (ppm) 0.90 (6 H, d, J = 5.0 Hz), 1.58-
1.87 (3H, m), 2.94-5.51 (11H,
m), 7.83 (1H, s), 8.39 (1H, s)

【0062】(実施例9)NMDA(N−メチル−D−アスパラギン酸)誘発痙攣
抑制作用 NMDAの生理食塩液溶液と、本発明に係わる各ニトロ
安息香酸誘導体の生理食塩溶液の等容量混合溶液10μ
lを、マウスの側脳室内にマイクロシリンジを用いて直
接投与した。この時、本溶液中にNMDAが0.32μ
g、各ニトロ安息香酸誘導体が0.32〜10μg含ま
れるように調製した。
(Example 9) NMDA (N-methyl-D-aspartic acid) -induced convulsions
Inhibitory action: 10 μm of a mixed solution of NMDA in physiological saline and physiological saline of each nitrobenzoic acid derivative according to the present invention in equal volume
1 was directly administered into the lateral ventricle of the mouse using a microsyringe. At this time, NMDA was 0.32μ in this solution.
g, and each nitrobenzoic acid derivative was prepared so as to be contained in an amount of 0.32 to 10 μg.

【0063】なお、この時、その構造を下記式化13に
示す平成2年特許願329581号に記載のピペラジン
誘導体の一例を比較として用いた。
At this time, an example of the piperazine derivative described in Japanese Patent Application No. 329581 of 1990 whose structure is shown in the following formula 13 was used for comparison.

【0064】NMDAと各ニトロ安息香酸誘導体及び比
較物質とを同時に投与したときの、痙攣誘発までの時間
を測定し、NMDA拮抗作用の強度を調べた。この結果
を、表1に示す。
When NMDA, each nitrobenzoic acid derivative and the comparative substance were simultaneously administered, the time until the induction of convulsions was measured to examine the strength of the NMDA antagonistic action. The results are shown in Table 1.

【0065】[0065]

【化13】 [Chemical 13]

【0066】[0066]

【表1】 [Table 1]

【0067】以上、表1に示すように、本発明の上記式
化6及び化8にその構造を示すニトロ安息香酸誘導体
は、公知の対照化合物(平成2年特許願329581号
に記載)と比較して、優れたNMDA受容体拮抗作用を
示した。
As shown in Table 1, the nitrobenzoic acid derivatives of the present invention having the structures shown in the above formulas 6 and 8 are compared with known control compounds (described in Japanese Patent Application No. 329581 in 1990). And showed excellent NMDA receptor antagonism.

【0068】なお、上記表1には記載していないが、本
発明に係わる他のニトロ安息香酸誘導体についても同様
に優れたNMDA受容体拮抗作用が認められた。
Although not shown in Table 1 above, other nitrobenzoic acid derivatives according to the present invention were also found to have excellent NMDA receptor antagonistic action.

【0069】(急性毒性)本発明に係わるニトロ安息香
酸誘導体は、ICR系雄性マウスの腹腔内に1000m
g/kgを投与しても、死亡並びに特筆すべき毒性症状
の発現は認められなかった。
(Acute toxicity) The nitrobenzoic acid derivative according to the present invention was intraperitoneally administered to an ICR male mouse at a dose of 1000 m.
Even if g / kg was administered, neither death nor remarkable toxic symptoms were observed.

【0070】[0070]

【発明の効果】以上述べたように、本発明により上記一
般式化2で示される新規なニトロ安息香酸誘導体が得ら
れる。当該ニトロ安息香酸誘導体は優れたNMDA拮抗
作用を有し、これを有効成分とする医薬製剤はNMDA
受容体拮抗剤として有効である。
As described above, according to the present invention, the novel nitrobenzoic acid derivative represented by the above general formula 2 can be obtained. The nitrobenzoic acid derivative has an excellent NMDA antagonistic action, and a pharmaceutical preparation containing it as an active ingredient is NMDA.
It is effective as a receptor antagonist.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】下記一般式化1(式中、R1、R2はそれぞ
れ水素原子または低級アルキル基を示し、R3は水素原
子、ハロゲン、アルコキシ基、アリールオキシ基、また
はニトロ基を表わす)で示されるニトロ安息香酸誘導
体。 【化1】
1. The following general formula 1 (in the formula, R 1 and R 2 each represent a hydrogen atom or a lower alkyl group, and R 3 represents a hydrogen atom, a halogen, an alkoxy group, an aryloxy group, or a nitro group. ) The nitrobenzoic acid derivative shown by these. [Chemical 1]
JP8684992A 1992-04-08 1992-04-08 Nitrobenzoic acid derivative Pending JPH05286947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8684992A JPH05286947A (en) 1992-04-08 1992-04-08 Nitrobenzoic acid derivative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8684992A JPH05286947A (en) 1992-04-08 1992-04-08 Nitrobenzoic acid derivative

Publications (1)

Publication Number Publication Date
JPH05286947A true JPH05286947A (en) 1993-11-02

Family

ID=13898265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8684992A Pending JPH05286947A (en) 1992-04-08 1992-04-08 Nitrobenzoic acid derivative

Country Status (1)

Country Link
JP (1) JPH05286947A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034593A1 (en) * 1996-03-18 1997-09-25 Radopath Limited AGONISTS IN THE COSTIMULATION OF TcR/CD3-INDUCED T-LYMPHOCYTES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034593A1 (en) * 1996-03-18 1997-09-25 Radopath Limited AGONISTS IN THE COSTIMULATION OF TcR/CD3-INDUCED T-LYMPHOCYTES

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