JP4888751B2 - Trifluoropropylaminopentane derivative and method for producing the same - Google Patents

Trifluoropropylaminopentane derivative and method for producing the same Download PDF

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JP4888751B2
JP4888751B2 JP2001280656A JP2001280656A JP4888751B2 JP 4888751 B2 JP4888751 B2 JP 4888751B2 JP 2001280656 A JP2001280656 A JP 2001280656A JP 2001280656 A JP2001280656 A JP 2001280656A JP 4888751 B2 JP4888751 B2 JP 4888751B2
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compound
benzofuran
bpap
tetrabenazine
aminopentane
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JP2003081960A (en
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文郎 米田
クノール ジョセフ
真由美 渡部
拓哉 安佐
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Fujimoto Brothers Co Ltd
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Fujimoto Brothers Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、新規な1-(ベンゾフラン-2-イル)-2-(3,3,3-トリフルオロプロピル)アミノペンタン及びその薬学的に許容される酸付加塩並びにそれらを有効成分として含有する医薬組成物に関する。
【0002】
【従来の技術】
ドパミン、セロトニン、ノルアドレナリン等の中枢モノアミンの脳内での過剰な増加は、精神神経疾患、例えば精神***病、躁病、薬物乱用による精神症状の原因となる。これらの疾患の治療には、中枢モノアミン受容体への作用薬が用いられている。例えば、抗精神病薬では、ドパミン遮断作用を有するクロルプロマジン、ハロペリドール等の定型抗精神病薬が使用されている。しかし、これら定型抗精神病薬は陰性症状には効果がほとんどなく、錐体外路症状、悪性症候群、肥満等の副作用が問題となっている(医薬ジャーナル 第33巻 第4号 1997年 90-94頁)。そこで、陰性症状の治療並びに副作用の軽減を目的に、非定型抗精神病薬の開発が現在進んでおり(医薬ジャーナル 第37巻 増刊号 2001年 77-82頁)、一部薬剤については臨床使用されている。
【0003】
【発明が解決しようとする課題】
比較的副作用が少なく、陰性症状にも効果のある非定型抗精神病薬においても、副作用の問題は完全には解決されておらず、薬剤の効果が少ない難治療性患者の2/3は十分に改善されていないため、現状ではこうした患者の治療は困難を極めている(医学と薬学 第44巻 第5号 2000年 875-882頁)。そこで、より副作用が少なく、難治療性患者にも有効と考えられる、中枢モノアミン受容体作用薬とは異なる作用機序の薬剤が望まれている。
【0004】
【課題を解決するための手段】
本発明者らは鋭意検討を重ね、CAE/SAE効果(Catecholaminergic and Serotoninergic Activity Enhancer 効果)を阻害することにより、中枢モノアミン受容体に作用することなく、これらアミンの放出を阻害する本発明化合物を完成させた。CAE/SAE効果は膜電位依存性エクソサイトーシスの増強によるカテコールアミン及びセロトニン放出促進効果である[ライフサイエンス(Life Sciences) 58巻 945-952頁(1996)]。この CAE/SAE効果が過剰に促進されると、中枢モノアミンの異常増加による精神神経疾患、例えば精神***病、躁病、薬物乱用による精神症状が起こる可能性がある。そのため、CAE/SAE効果の阻害剤は、中枢モノアミン放出を阻害することにより、これら疾患の新たな治療薬となる可能性がある。
【0005】
【発明の実施の形態】
本発明の方法によれば、下式
【0006】
【化2】

Figure 0004888751
【0007】
の一級アミンとトリフルオロプロピオンアルデヒドを溶媒中、適当な還元剤の存在下、室温から還流温度の範囲で反応させることにより下式
【0008】
【化1】
Figure 0004888751
【0009】
の1-(ベンゾフラン-2-イル)-2-(3,3,3-トリフルオロプロピル)アミノペンタンが得られる。溶媒は反応を阻害しなければ何でも良く、例えば、1,2-ジクロロエタン、ジクロロメタン、テトラヒドロフラン、アセトニトリル等の有機溶媒を使用することができる。還元剤としては、水素化トリアセトキシホウ素ナトリウム、水素化シアノホウ素ナトリウム等の複合水素化合物やボランを使用することができる。場合によっては酢酸を加えることも可能である。
【0010】
このようにして得られた上記の1-(ベンゾフラン-2-イル)-2-(3,3,3-トリフルオロプロピル)アミノペンタンをジエチルエーテル等の有機溶媒中、薬学的に許容される酸と処理することにより、薬学的に許容される酸付加塩が得られる。必要ならば再結晶により、さらに高純度の精製品とすることができる。ここで薬学的に許容される酸は、例えば塩酸、硫酸、臭化水素酸、リン酸等の無機酸、又は、グルコン酸、マレイン酸、フマル酸、コハク酸、酒石酸、リンゴ酸、クエン酸、シュウ酸、安息香酸、マンデル酸等の有機酸を挙げることができる。 原料化合物である一級アミンはWO 99/07667に記載の方法等によって合成することができる。
【0011】
WO 00/26204に記載の化合物(-)- 1-(ベンゾフラン-2-イル)-2-プロピルアミノペンタン[(-)-1-(Benzofuran-2-yl)-2-propylaminopentane : (-)BPAP]は CAE/SAE効果を有しており、中枢モノアミン枯渇剤であるテトラベナジンとの併用にもかかわらず、ラットのテトラベナジンによる条件回避反応の低下を、テトラベナジン単独投与に比べ有意に抑制した。この(-)BPAP の作用はCAE/SAE効果によって生理的に生じた中枢モノアミン放出促進に基づくものである。しかし、本発明化合物と(-)BPAPとテトラベナジンの3化合物を併用した場合、ラットの条件回避反応は、(-)BPAPとテトラベナジンの併用に比べ有意に低かった。これは、本発明化合物が(-)BPAPのCAE/SAE効果を阻害し、その結果テトラベナジンによる条件回避反応の低下を(-)BPAPが改善できなかったことを意味する。すなわち、本発明化合物は、CAE/SAE効果に基づく中枢モノアミン放出の阻害剤であると言える。このように、本発明化合物は、既存の中枢モノアミン受容体作用薬とは異なる作用機序、すなわちCAE/SAE効果に基づく中枢モノアミン放出の阻害作用を有しており、中枢モノアミンの増加による精神神経疾患、例えば精神***病、躁病、薬物乱用による精神症状の治療薬になると考えられる。
【0012】
本発明化合物及びその薬学的に許容される酸付加塩を上記医薬として用いる場合、通常担体、賦形剤、希釈剤、溶解補助剤等を添加物として、混合、溶解、練合、造粒、整粒、打錠、充てんなどの一般的な製剤技術を用いて製剤化し、錠剤、散剤、顆粒剤、カプセル剤、注射剤などの形態で経口的又は非経口的に投与することが可能である。投与量は患者の症状、年齢、体重等により変わるが、通常、成人あたり経口で0.1〜100mgの範囲で、1回又は数回に分けて投与することができる。
【0013】
以下に、実施例を挙げて、本発明化合物について更に具体的に説明するが、本発明がこれらに限定されないことは言うまでもない。
【0014】
【実施例1】
1-(ベンゾフラン-2-イル)-2-(3,3,3-トリフルオロプロピル)アミノペンタンの製造
アルゴン雰囲気下、1-(ベンゾフラン-2-イル)-2-アミノペンタン(1.13g, 5.6mmol)の1,2-ジクロロエタン(30mL)溶液に室温撹拌下で3,3,3-トリフルオロプロピオンアルデヒド(620mg, 5.6mmol)及び水素化トリアセトキシホウ素ナトリウム(1.77g, 8.3mmol)を加え、室温で13時間撹拌した。この黄色懸濁溶液に室温撹拌下、1mol/L水酸化ナトリウム水溶液(50mL)を加え、酢酸エチル(100mL)で抽出した。有機層を水(30mL)続いて飽和食塩水(30mL)で洗浄し、無水硫酸ナトリウムで乾燥後減圧濃縮した。残渣の黄色液体をカラムクロマトグラフィー(AcOEt/Hexane=1/4)で精製し、黄色液体の1-(ベンゾフラン-2-イル)-2-(3,3,3-トリフルオロプロピル)アミノペンタン(1.21g, 73%) を得た。
【0015】
MS(EI) m/z 300[(M+1)+]
IR(neat) 2940, 2860, 1585, 1455, 1260, 1142, 1006, 945, 803, 750 cm-1
NMR(CDCl3)δ0.93(t,3H,J=7.1Hz),1.15-1.60(m,4H),2.10-2.36(m,2H),2.75-3.03(m,5H),6.45(s,1H),7.12-7.30(m,2H),7.36-7.45(m,1H),7.45-7.47(m,1H) ppm
【0016】
【実施例2】
1-(ベンゾフラン-2-イル)-2-(3,3,3-トリフルオロプロピル)アミノペンタン塩酸塩の製造
1-(ベンゾフラン-2-イル)-2-(3,3,3-トリフルオロプロピル)アミノペンタン(1.20g, 4.0mmol)のジエチルエーテル(25mL)溶液に氷冷撹拌下、飽和塩化水素ジエチルエーテル溶液(2.5mL)を加えた。析出した結晶をろ取し、ジエチルエーテル(5mLx3)で洗浄した。この白色結晶(1.35g, 99%)をジエチルエーテル(20mL)より再結晶し、白色粉末状結晶の塩酸塩(1.21g, 89%)を得た。
【0017】
m.p. 174.5〜176.0℃
MS(EI) m/z 299(M+)
IR(KBr) 3520, 3040, 2950, 2860, 2710, 1455, 1254, 1170, 1003, 749 cm-1
NMR(CDCl3)δ0.94(t,3H,J=7.4Hz),1.40-1.73(m,2H),1.73-2.02(m,2H),2.86-3.11(m,2H),3.11-3.33(m,2H),3.26(dd,2H,J=7.4,15.1Hz),3.40-3.67(m,1H),3.48(dd,2H,J=5.4,15.1Hz),6.67(s,1H),7.15-.33(m,2H),7.44(d,1H,J=8.1Hz),7.52(dd,1H,J=2.4,7.4Hz),9.77(br,2H) ppm
元素分析:C16H20NOF3・HClとして
理論値 C : 57.23 H : 6.30 N : 4.17 (%)
実測値 C : 57.20 H : 6.27 H : 4.10 (%)
【0018】
【実施例3】
シャトルボックスにおけるラットの条件回避反応への作用
ライフサイエンス 58巻 817-827頁 (1996) に記載の方法を用いて、テトラベナジン処置により学習能力の低下した雌雄ラット(200〜220g)のシャトルボックスにおける条件回避反応(Conditioned Avoidance Reflex : CARs) への作用を検討した。 装置は、サイコファーマコロジア(Psychopharmacologia) 10巻 1-5頁 (1996) に従って組み立てられ、体重200〜220gの雌雄ラットを用い、条件刺激(Conditiond Stimulus : CS、光とブザー音)を受けて、仕切りを通り抜けるよう訓練した。もし失敗すれば無条件刺劇(Unconditioned Stimulus : US)であるフットショック(1mA)を与えた。ラットがUSに対し、5秒以内に反応しなければ逃避不成功(Escape Failure : EFs)とした。ラットには1日100試行、5日間の訓練を行った。各試行は15秒間の試行間隔と続く15秒間のCSから構成された。CSの最後の5秒間はUSの5秒間と重なった。CARs、EFsは自動的に測定され、分散分析により解析された。テトラベナジンを生理食塩液に溶解し、試験の1時間前に1mg/kg の用量で皮下投与して、ラットの条件回避反応を低下させた。(-)BPAPを生理食塩液に溶解し、テトラベナジンと同時に0.05, 0.1, 0.25, 0.5, 1, 2.5, 5又は10mg/kgの用量で皮下投与し、(-)BPAPのテトラベナジンによる条件回避反応の低下に対する抑制作用(CARs, EFs)を測定した。またテトラベナジンと同時に0.1mg/kgのBPAPと1mg/kgの本発明化合物を一緒に投与し、CARsを測定した。
【0019】
テトラベナジンと各用量の(-)BPAPを併用した場合のCARs、EFsを表1に示した。テトラベナジンと0.1mg/kgの(-)BPAPの併用群及びテトラベナジンと0.1mg/kgの(-)BPAPと1mg/kgの本発明化合物の3化合物併用群のCARsの結果を図1に示した。
【0020】
【表1】
Figure 0004888751
【0021】
表1より、(-)BPAPは投与量0.05mg/kgからテトラベナジン単独投与に比べて有意にCARsを増加させ、同時に有意にEFsを低下させた。投与量0.5mg/kgからは食塩水投与と同等かそれ以上にCARsを増加させ、同時にEFsを食塩水投与より低下させた。すなわち、(-)BPAPはテトラベナジンにより誘発された条件回避反応の低下を有意に改善させることが認められた。図1より、テトラベナジンと(-)BPAPと本発明化合物の3化合物併用群はテトラベナジンと(-)BPAPの併用群に比べ有意にCARsが低かった。すなわち、(-)BPAPによるCAE/SAE効果は本発明化合物で有意に阻害されることが認められた。
【0022】
【発明の効果】
本発明化合物である1-(ベンゾフラン-2-イル)-2-(3,3,3-トリフルオロプロピル)アミノペンタンは、(-)BPAP のCAE/SAE効果に対して阻害作用を示した。本発明により中枢モノアミン過剰による精神神経疾患のこれまでとは異なる作用機序に基づく治療薬となりうる新規合成化合物を提供することができた。
【図面の簡単な説明】
【図1】本発明化合物の、CAE/SAE効果に対する阻害作用を示すグラフである。[0001]
BACKGROUND OF THE INVENTION
The present invention contains novel 1- (benzofuran-2-yl) -2- (3,3,3-trifluoropropyl) aminopentane and pharmaceutically acceptable acid addition salts thereof and active ingredients thereof. It relates to a pharmaceutical composition.
[0002]
[Prior art]
Excessive increases in the brain of central monoamines such as dopamine, serotonin, noradrenaline, etc., cause psychological symptoms due to neuropsychiatric disorders such as schizophrenia, mania, and drug abuse. For the treatment of these diseases, agents acting on the central monoamine receptor are used. For example, typical antipsychotic drugs such as chlorpromazine and haloperidol having a dopamine blocking action are used as antipsychotic drugs. However, these typical antipsychotic drugs have little effect on negative symptoms, and side effects such as extrapyramidal symptoms, malignant syndrome, obesity, etc. are problematic (Pharmaceutical Journal, Vol. 33, No. 4, 1997, 90-94) ). Therefore, the development of atypical antipsychotic drugs is currently progressing with the aim of treating negative symptoms and reducing side effects (Pharmaceutical Journal Vol. 37, Special Issue 2001, pages 77-82), and some drugs are clinically used. ing.
[0003]
[Problems to be solved by the invention]
Even with atypical antipsychotics that have relatively few side effects and are effective against negative symptoms, the problem of side effects has not been completely solved, and two-thirds of refractory patients with low drug effects are sufficient. Because of the lack of improvement, it is currently difficult to treat these patients (Medicine and Pharmacy, Vol. 44, No. 5, 2000, pages 875-882). Therefore, a drug with a mechanism of action different from that of a central monoamine receptor agonist, which has fewer side effects and is considered to be effective for refractory patients, is desired.
[0004]
[Means for Solving the Problems]
The present inventors have conducted intensive studies and completed the compounds of the present invention that inhibit the release of these amines without acting on the central monoamine receptor by inhibiting the CAE / SAE effect (Catecholaminergic and Serotoninergic Activity Enhancer effect). I let you. The CAE / SAE effect is an effect of promoting catecholamine and serotonin release by enhancing membrane voltage-dependent exocytosis [Life Sciences 58: 945-952 (1996)]. If this CAE / SAE effect is promoted excessively, there may be a neuropsychiatric disorder such as schizophrenia, mania or drug abuse due to an abnormal increase in central monoamines. Therefore, inhibitors of the CAE / SAE effect may become new therapeutic agents for these diseases by inhibiting central monoamine release.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
According to the method of the present invention, the following formula:
[Chemical formula 2]
Figure 0004888751
[0007]
By reacting primary amine with trifluoropropionaldehyde in a solvent in the presence of a suitable reducing agent at a temperature ranging from room temperature to reflux temperature.
[Chemical 1]
Figure 0004888751
[0009]
Of 1- (benzofuran-2-yl) -2- (3,3,3-trifluoropropyl) aminopentane. Any solvent may be used as long as it does not inhibit the reaction. For example, an organic solvent such as 1,2-dichloroethane, dichloromethane, tetrahydrofuran, acetonitrile and the like can be used. As the reducing agent, a complex hydrogen compound such as sodium triacetoxyborohydride or sodium cyanoborohydride or borane can be used. In some cases, acetic acid may be added.
[0010]
The 1- (benzofuran-2-yl) -2- (3,3,3-trifluoropropyl) aminopentane thus obtained is pharmaceutically acceptable acid in an organic solvent such as diethyl ether. To give a pharmaceutically acceptable acid addition salt. If necessary, it can be purified to a higher purity by recrystallization. Examples of the pharmaceutically acceptable acid include inorganic acids such as hydrochloric acid, sulfuric acid, hydrobromic acid, and phosphoric acid, or gluconic acid, maleic acid, fumaric acid, succinic acid, tartaric acid, malic acid, citric acid, Mention may be made of organic acids such as oxalic acid, benzoic acid and mandelic acid. The primary amine which is a raw material compound can be synthesized by the method described in WO 99/07667.
[0011]
Compound (-)-1- (benzofuran-2-yl) -2-propylaminopentane described in WO 00/26204 [(-)-1- (Benzofuran-2-yl) -2-propylaminopentane: (-) BPAP ] Had a CAE / SAE effect, and despite the combined use of tetrabenazine, a central monoamine depleting agent, significantly reduced the condition avoidance response caused by tetrabenazine in rats compared to tetrabenazine alone. This action of (-) BPAP is based on the central monoamine release enhancement physiologically produced by the CAE / SAE effect. However, when the compound of the present invention, (-) BPAP, and tetrabenazine were used in combination, the condition avoidance reaction in rats was significantly lower than that of the combination of (-) BPAP and tetrabenazine. This means that the compound of the present invention inhibited the CAE / SAE effect of (−) BPAP, and as a result, (−) BPAP could not improve the decrease in the condition avoidance reaction caused by tetrabenazine. That is, it can be said that the compound of the present invention is an inhibitor of central monoamine release based on the CAE / SAE effect. Thus, the compound of the present invention has a mechanism of action different from that of existing central monoamine receptor agonists, that is, an inhibitory action on central monoamine release based on the CAE / SAE effect. It is considered to be a treatment for psychiatric symptoms caused by diseases such as schizophrenia, mania, and drug abuse.
[0012]
When the compound of the present invention and a pharmaceutically acceptable acid addition salt thereof are used as the above-mentioned medicament, usually a carrier, excipient, diluent, solubilizing agent, etc. are added, mixed, dissolved, kneaded, granulated, It can be formulated using general formulation techniques such as sizing, tableting, filling, etc. and can be administered orally or parenterally in the form of tablets, powders, granules, capsules, injections, etc. . The dosage varies depending on the patient's symptoms, age, body weight, etc., but can be usually administered orally in the range of 0.1 to 100 mg per adult or divided into several doses.
[0013]
Hereinafter, the present invention compound will be described in more detail with reference to examples, but it goes without saying that the present invention is not limited thereto.
[0014]
[Example 1]
Preparation of 1- (benzofuran-2-yl) -2- (3,3,3-trifluoropropyl) aminopentane Under argon atmosphere, 1- (benzofuran-2-yl) -2-aminopentane (1.13 g, 5.6 mmol) in 1,2-dichloroethane (30 mL) with stirring at room temperature, 3,3,3-trifluoropropionaldehyde (620 mg, 5.6 mmol) and sodium triacetoxyborohydride (1.77 g, 8.3 mmol) were added, Stir at room temperature for 13 hours. To this yellow suspension, 1 mol / L aqueous sodium hydroxide solution (50 mL) was added with stirring at room temperature, and the mixture was extracted with ethyl acetate (100 mL). The organic layer was washed with water (30 mL) followed by saturated brine (30 mL), dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residual yellow liquid was purified by column chromatography (AcOEt / Hexane = 1/4) and the yellow liquid 1- (benzofuran-2-yl) -2- (3,3,3-trifluoropropyl) aminopentane ( 1.21 g, 73%).
[0015]
MS (EI) m / z 300 [(M +1 ) + ]
IR (neat) 2940, 2860, 1585, 1455, 1260, 1142, 1006, 945, 803, 750 cm -1
NMR (CDCl 3) δ0.93 (t , 3H, J = 7.1Hz), 1.15-1.60 (m, 4H), 2.10-2.36 (m, 2H), 2.75-3.03 (m, 5H), 6.45 (s, 1H), 7.12-7.30 (m, 2H), 7.36-7.45 (m, 1H), 7.45-7.47 (m, 1H) ppm
[0016]
[Example 2]
Preparation of 1- (benzofuran-2-yl) -2- (3,3,3-trifluoropropyl) aminopentane hydrochloride
To a solution of 1- (benzofuran-2-yl) -2- (3,3,3-trifluoropropyl) aminopentane (1.20 g, 4.0 mmol) in diethyl ether (25 mL) with ice-cooling, saturated hydrogen chloride diethyl ether Solution (2.5 mL) was added. The precipitated crystals were collected by filtration and washed with diethyl ether (5 mL × 3). The white crystals (1.35 g, 99%) were recrystallized from diethyl ether (20 mL) to obtain hydrochloride (1.21 g, 89%) of white powder crystals.
[0017]
mp 174.5-176.0 ° C
MS (EI) m / z 299 (M + )
IR (KBr) 3520, 3040, 2950, 2860, 2710, 1455, 1254, 1170, 1003, 749 cm -1
NMR (CDCl 3) δ0.94 (t , 3H, J = 7.4Hz), 1.40-1.73 (m, 2H), 1.73-2.02 (m, 2H), 2.86-3.11 (m, 2H), 3.11-3.33 ( m, 2H), 3.26 (dd, 2H, J = 7.4,15.1Hz), 3.40-3.67 (m, 1H), 3.48 (dd, 2H, J = 5.4,15.1Hz), 6.67 (s, 1H), 7.15 -.33 (m, 2H), 7.44 (d, 1H, J = 8.1Hz), 7.52 (dd, 1H, J = 2.4,7.4Hz), 9.77 (br, 2H) ppm
Elemental analysis: Theoretical value as C 16 H 20 NOF 3 · HCl C: 57.23 H: 6.30 N: 4.17 (%)
Measured value C: 57.20 H: 6.27 H: 4.10 (%)
[0018]
[Example 3]
Effect on condition avoidance reaction of rats in shuttle box Life science Conditions in shuttle box of male and female rats (200-220 g) whose learning ability was reduced by tetrabenazine treatment using the method described in Vol. 58, 817-827 (1996) The effect on Conditioned Avoidance Reflex (CARS) was investigated. The device is constructed according to Psychopharmacologia 10: 1-5 (1996), using male and female rats weighing 200-220 g, subjected to conditional stimulation (CS, light and buzzer sound), Trained to go through the partition. If unsuccessful, I gave a footshock (1mA), an unconditioned Stimulus (US). If the rat did not respond to the US within 5 seconds, it was regarded as Escape Failure (EFs). Rats were trained for 100 trials per day for 5 days. Each trial consisted of a 15 second trial interval followed by a 15 second CS. The last 5 seconds of CS overlapped with 5 seconds of US. CARs and EFs were automatically measured and analyzed by analysis of variance. Tetrabenazine was dissolved in physiological saline and administered subcutaneously at a dose of 1 mg / kg 1 hour before the test to reduce the conditioned avoidance response in rats. (-) BPAP is dissolved in physiological saline and administered subcutaneously at a dose of 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5 or 10 mg / kg simultaneously with tetrabenazine. Inhibitory effects on reduction (CARs, EFs) were measured. Simultaneously with tetrabenazine, 0.1 mg / kg BPAP and 1 mg / kg of the compound of the present invention were administered together, and CARs were measured.
[0019]
Table 1 shows CARs and EFs when tetrabenazine and each dose of (-) BPAP are used in combination. The results of CARs of the combination group of tetrabenazine and 0.1 mg / kg (-) BPAP and the combination group of tetrabenazine, 0.1 mg / kg (-) BPAP and 1 mg / kg of the compound of the present invention are shown in FIG.
[0020]
[Table 1]
Figure 0004888751
[0021]
From Table 1, (-) BPAP significantly increased CARs and significantly decreased EFs from the dose of 0.05 mg / kg compared to tetrabenazine alone. From the dose of 0.5 mg / kg, CARs were increased to a level equivalent to or higher than that of saline administration, and at the same time, EFs were decreased from that of saline administration. That is, (-) BPAP was found to significantly improve the reduction of condition avoidance induced by tetrabenazine. From FIG. 1, the CARs were significantly lower in the combination group of tetrabenazine, (−) BPAP, and the compound of the present invention than in the combination group of tetrabenazine and (−) BPAP. That is, it was confirmed that the CAE / SAE effect by (−) BPAP was significantly inhibited by the compound of the present invention.
[0022]
【Effect of the invention】
The compound of the present invention, 1- (benzofuran-2-yl) -2- (3,3,3-trifluoropropyl) aminopentane, showed an inhibitory action on the CAE / SAE effect of (−) BPAP. The present invention has made it possible to provide a novel synthetic compound that can be a therapeutic agent based on a mechanism of action different from that of a neuropsychiatric disorder caused by excessive central monoamine.
[Brief description of the drawings]
FIG. 1 is a graph showing the inhibitory action of the compound of the present invention on the CAE / SAE effect.

Claims (5)

下式
Figure 0004888751
で示される1-(ベンゾフラン-2-イル)-2-(3,3,3-トリフルオロプロピル)アミノペンタン及びその薬学的に許容される酸付加塩。
The following formula
Figure 0004888751
1- (benzofuran-2-yl) -2- (3,3,3-trifluoropropyl) aminopentane and a pharmaceutically acceptable acid addition salt thereof.
有効量の請求項1記載の化合物及び少なくとも1種類の薬学的に許容される添加物を含有する医薬組成物。A pharmaceutical composition comprising an effective amount of the compound of claim 1 and at least one pharmaceutically acceptable additive. 請求項1記載の化合物を有効成分として含有する中枢モノアミン放出阻害剤。A central monoamine release inhibitor comprising the compound according to claim 1 as an active ingredient. 請求項1記載の化合物を有効成分として含有する精神神経疾患治療薬。A therapeutic agent for a neuropsychiatric disorder comprising the compound according to claim 1 as an active ingredient. 下式
Figure 0004888751
で示される一級級アミンとトリフルオロプロピオンアルデヒドを、還元剤の存在下、室温から還流温度の範囲で反応させることを特徴とする下式
Figure 0004888751
で示される1-(ベンゾフラン-2-イル)-2-(3,3,3-トリフルオロプロピル)アミノペンタン及びその薬学的に許容される酸付加塩の製造方法
The following formula
Figure 0004888751
A primary amine represented by the following formula is reacted with trifluoropropionaldehyde in the presence of a reducing agent in the range of room temperature to reflux temperature:
Figure 0004888751
1- (Benzofuran-2-yl) -2- (3,3,3-trifluoropropyl) aminopentane represented by the formula and a pharmaceutically acceptable acid addition salt thereof
JP2001280656A 2001-09-14 2001-09-14 Trifluoropropylaminopentane derivative and method for producing the same Expired - Fee Related JP4888751B2 (en)

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