JP3699769B2 - Peptide type compound - Google Patents
Peptide type compound Download PDFInfo
- Publication number
- JP3699769B2 JP3699769B2 JP05733896A JP5733896A JP3699769B2 JP 3699769 B2 JP3699769 B2 JP 3699769B2 JP 05733896 A JP05733896 A JP 05733896A JP 5733896 A JP5733896 A JP 5733896A JP 3699769 B2 JP3699769 B2 JP 3699769B2
- Authority
- JP
- Japan
- Prior art keywords
- formula
- compound
- mmol
- acid
- represented
- 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 - Lifetime
Links
Landscapes
- Peptides Or Proteins (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Pyrrole Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、式(II)
【化7】
で示される新規化合物およびその塩ならびにその製造方法に関する。
【0002】
本発明の別の目的は、上記新規化合物またはその塩の、所望により、分離されることのある式(Ia)
【化8】
で示される中間体を経由する式(I)
【化9】
で示されるリシノプリルの製造における使用である。
【0003】
【従来の技術および発明が解決しようとする課題】
アンジオテンシン変換酵素を阻害するリシノプリルおよび他の関連化合物は、最初にEP特許第12,401号に記載されている。その中に記載の全ての方法では、最終生成物がジアステレオ異性体の混合物として生成し、それから所望のS,S,S−ジアステレオマーをクロマトグラフィーにより単離している。
【0004】
更なる研究の一つの方向は、高ジアステレオマー選択性を達成することである。この種の例は、EP特許第168,769号に記載されている。ここで、4−フェニル−2−オキソ酪酸エチルをN6−トリフルオロアセチル−L−リジル−L−プロリンと反応させ、主生成物の式(Ia)で示されるN2−(1S)−ジアステレオマーと共に、多少のN2−(1R)−ジアステレオマーが生成する。しかしながら、個々のジアステレオマーの分離は、51%の低収率である。
【0005】
研究の別の方向は、高ジアステレオマー選択性と合成初期のジアステレオマーの分離の組み合わせである。すなわち、HU特許第207,837号に記載の方法によると、式(III)
【化10】
で示される化合物が良好な収率でS,S−立体配置で得られる。この化合物を、更にHU特許第207,736号にしたがって、プロリンエチルエステルと反応させる。しかしながら、この工程は、実験室では容易に行えるが、プロリンエチルエステルの不安定性のため、工場規模では欠点を有する。
【0006】
【課題を解決するための手段】
驚くべきことに、式(III)で示される化合物を、式(IV)
【化11】
で示される化合物のプロリンベンジルエステルまたはその酸付加塩と反応させた場合、式(II)で示される、S,S,S−立体配置を有する新規化合物が、工場規模でさえ、安定性の問題がなく得られることが判明した。所望により、新規化合物の塩が、例えば塩酸、マレイン酸、コハク酸、シュウ酸、ジベンゾイル酒石酸等で形成され得る。
【0007】
式(III)で示される化合物と式(IV)で示される化合物の反応は、ペプチド化学で既知の方法(例えば、M.ボダンスキー:Principles of the Peptide Synthesis, Springer Verlag, Berlin, 1984)で行うことができる。
【0008】
反応の好ましい態様によると、式(IV)で示されるプロリンベンジルエステルの酸付加塩を出発物質として使用し、そこから塩基を遊離し、ジシクロヘキシルカルボジイミドおよび不活性溶媒の存在下、式(III)で示される化合物と反応させる。反応は、室温または0℃〜25℃の範囲で行う。
【0009】
別法として、式(III)で示される化合物をホスゲンと反応させ、適当なN−カルボン酸無水物を生成させ、それを好ましくはそのまま式(IV)で示される化合物と反応させる。本反応は、不活性有機溶媒、例えば塩素化炭化水素、エーテルまたはエステル型溶媒等の中で行う。
【0010】
80−85%の収率で得られた式(II)で示される新規化合物を、次いで接触水素化に付し、実質上定量的収率で、式(Ia)で示される化合物を得る。続いて式(Ia)で示される化合物を、既知の方法で加水分解すると、例えば放棄されたEP特許第168,769号に記載の方法に従って、式(I)が得られる。
本発明を、更に、以下の実施例により説明するが、これに限定されるものではない。
【0011】
【実施例】
実施例1
N2−(1S)−(1−エトキシカルボニル−3−フェニルプロピル)−N6−トリフルオロアセチル−(L)−リジル−(L)−プロリンベンジルエステルマレイン酸塩[式(II)で示される化合物]
N2−(1S)−(1−エトキシカルボニル−3−フェニルプロピル)−N6−トリフルオロアセチル−(L)−リジン[式(III)で示される化合物]34.56g(80mmol)および(L)−プロリンベンジル・塩酸塩[式(IV)で示される化合物]19.34g(80mmol)を乾燥ジクロロメタン200mlに懸濁する。懸濁液を0℃〜5℃に冷却し、N−メチルモルホリン8.8ml(8.8mmol)、次いで乾燥ジクロロメタン50ml中ジシクロヘキシルカルボジイミド18g(88mmol)を添加する。反応混合物を撹拌しながら0℃に6時間維持する。沈殿物を濾取し、乾燥ジクロロメタンで洗浄する。母液を、連続して、水、5%炭酸ナトリウム水溶液、1%酢酸水溶液および水で抽出する。次いで、無水硫酸マグネシウムで乾燥し、溶媒を留去する。油状残渣をメチル−t−ブチルエーテル200mlに溶解し、マレイン酸9.28g(80mmol)を溶液に加える。3時間0℃にて撹拌後、結晶性生成物を濾取し、メチル−t−ブチルエーテルで0℃にて洗浄し、標題化合物4.82g(82%)を得る;m.p.106−107℃、[α]D 25=−36°(c=1、メタノール)。
【0012】
実施例2
[N2−(1S)−(1−エトキシカルボニル−3−フェニルプロピル)−N6−トリフルオロアセチル−(L)−リジル−(L)−プロリン]ベンジル塩酸塩[式(II)で示される化合物]
乾燥ジクロロメタン250ml中式(III)で示される化合物21.6g(50mmol)の懸濁液に、ホスゲン20g(0.2mol)を−10℃〜−20℃の範囲の温度で添加する。反応混合物を4時間還流し、次いで溶媒および過剰のホスゲンを蒸発により除去し、残渣(該等するN−カルボン酸無水物)を乾燥ジクロロメタン100mlに溶解する。溶液を0℃に冷却し、(L)−プロリンベンジルエステル塩酸塩12.2g(50mmol)、N−メチルモルホリン11ml(50mmol)および乾燥ジクロロメタン100mlからなる懸濁液に加える。添加中は、温度を0℃に維持し、次いで反応混合物を撹拌下8時間20℃に保つ。反応混合物を、連続して、水、5%炭酸カリウム水溶液、2%酢酸水溶液および水で抽出する。有機層を無水硫酸マグネシウムで乾燥し、溶媒を留去する。残渣をジエチルエーテル150mlに溶解し、エーテル中3N塩酸16.6mlを溶液に加え、標題化合物の沈殿物を得る。
収率:23.5g(76%);m.p.55−58℃;[α]D 25=−35.3°(c=1、メタノール)。
【0013】
上記方法において、実施例1で得られるものと同じ物理的特性を有する式(II)で示される化合物のマレイン酸塩もまた製造できる。また、式(II)で示される化合物のジベンゾイル酒石酸塩も上記方法で製造できる;m.p.59−64℃、[α]D 25=−76°(c=1、メタノール)。
【0014】
実施例3
N2−(1S)−(1−エトキシカルボニル−3−フェニルプロピル)−N6−トリフルオロアセチル−(L)−リジル−(L)−プロリンジベンゾイル酒石酸塩[式(Ia)で示される化合物]
ジクロロメタン100ml中式(II)で示される化合物14.71g(20mmol)の溶液を5%炭酸カリウム水溶液80mlで抽出し、無水硫酸マグネシウムで乾燥し、溶媒を留去する。残渣をエタノール100mlに溶解し、10%パラジウム炭素1gの存在下、水素添加する。1当量の水素が取り込まれたら(約15分)、触媒を濾去し、濾液を留去すると、生成物10.5g(約100%)が無色油状物として塩基の形で生成する。これは、更に精製することなく、リシノプリル二水和物(実施例4参照)または、そのジベンゾイル酒石酸に下記のようにして変換できる:生成物2.1g(4mmol)をジエチルエーテル10mlに溶解する。この溶液にジベンゾイル−(L)−酒石酸1.5g(4mmol)を加え、塩をn−ヘキサンの添加により沈殿させる。結晶塩を濾取し、n−ヘキサンで洗浄し、標題化合物3.45g(96%)を得る:m.p.95−97℃、[α]D 25=−64.5°(c=1、メタノール)。
【0015】
実施例4
リシノプリル二水和物[式(I)で示される化合物]
ジクロロメタン100ml中式(II)で示される化合物14.71g(20mmol)の溶液を、5%炭酸カリウム水溶液80mlで抽出し、無水硫酸マグネシウムで乾燥し、溶媒を留去する。残渣をエタノール100mlに溶解し、10%パラジウム炭素1gの存在下、水素添加する。1モル当量の水素が取り込まれたら、触媒を濾去する。濾液を半分の量まで濃縮し、0℃に冷却し、25%水酸化テトラメチルアンモニウム水溶液23.4ml(66mmol)を濃縮物に加える。混合物を撹拌下20〜25℃に8時間維持し、次いでエタノール50mlを添加し、50%トリフルオロ酢酸を添加することによりpHを6.5に調整する。結晶生成物を0℃に冷却し、濾取し、85%エタノールと水の混合物で洗浄し、リシノプリル二水和物7.85gを得る(89%)。m.p.169−172℃、[α]D 25=−41.2°(0.25M酢酸亜鉛)。[0001]
BACKGROUND OF THE INVENTION
The present invention is a compound of formula (II)
[Chemical 7]
And a production method thereof.
[0002]
Another object of the present invention is to provide a compound of formula (Ia) which may be optionally separated from the novel compounds or salts thereof.
[Chemical 8]
Formula (I) via an intermediate represented by
[Chemical 9]
In the production of lisinopril represented by
[0003]
[Background Art and Problems to be Solved by the Invention]
Lisinopril and other related compounds that inhibit angiotensin converting enzyme were first described in EP Patent No. 12,401. In all the methods described therein, the final product is formed as a mixture of diastereoisomers, from which the desired S, S, S-diastereomer is isolated by chromatography.
[0004]
One direction of further research is to achieve high diastereomeric selectivity. An example of this type is described in EP patent 168,769. Here, ethyl 4-phenyl-2-oxobutyrate is reacted with N 6 -trifluoroacetyl-L-lysyl-L-proline to produce N 2- (1S) -dia of the main product represented by the formula (Ia). Some N 2- (1R) -diastereomer is formed along with the stereomer. However, the separation of the individual diastereomers is a low yield of 51%.
[0005]
Another direction of research is a combination of high diastereomeric selectivity and early diastereomeric separation. That is, according to the method described in HU Patent No. 207,837, the formula (III)
[Chemical Formula 10]
Is obtained in good yield with S, S-configuration. This compound is further reacted with proline ethyl ester according to HU patent 207,736. However, this process can be easily performed in the laboratory, but has disadvantages on a factory scale due to the instability of proline ethyl ester.
[0006]
[Means for Solving the Problems]
Surprisingly, the compound of formula (III) is converted to formula (IV)
Embedded image
When the compound represented by formula (II) is reacted with a proline benzyl ester or an acid addition salt thereof, the novel compound having the S, S, S-configuration represented by the formula (II) has a problem of stability even at a factory scale. It was found that it can be obtained without. If desired, salts of the novel compounds can be formed with, for example, hydrochloric acid, maleic acid, succinic acid, oxalic acid, dibenzoyltartaric acid, and the like.
[0007]
The reaction of the compound represented by the formula (III) and the compound represented by the formula (IV) is performed by a method known in peptide chemistry (for example, M. Bodanski: Principles of the Peptide Synthesis, Springer Verlag, Berlin, 1984). Can do.
[0008]
According to a preferred embodiment of the reaction, an acid addition salt of proline benzyl ester of formula (IV) is used as a starting material from which the base is liberated and in the presence of dicyclohexylcarbodiimide and an inert solvent, in formula (III) React with the indicated compound. The reaction is carried out at room temperature or in the range of 0 ° C to 25 ° C.
[0009]
Alternatively, the compound of formula (III) is reacted with phosgene to form the appropriate N-carboxylic acid anhydride, which is preferably reacted directly with the compound of formula (IV). This reaction is carried out in an inert organic solvent such as chlorinated hydrocarbon, ether or ester type solvent.
[0010]
The novel compound of formula (II) obtained in a yield of 80-85% is then subjected to catalytic hydrogenation to obtain the compound of formula (Ia) in substantially quantitative yield. Subsequent hydrolysis of the compound of formula (Ia) by known methods yields formula (I), for example according to the method described in abandoned EP patent 168,769.
The invention is further illustrated by the following examples without however being limited thereto.
[0011]
【Example】
Example 1
N 2- (1S)-(1-ethoxycarbonyl-3-phenylpropyl) -N 6 -trifluoroacetyl- (L) -lysyl- (L) -proline benzyl ester maleate [shown by formula (II) Compound]
N 2- (1S)-(1-ethoxycarbonyl-3-phenylpropyl) -N 6 -trifluoroacetyl- (L) -lysine [compound of formula (III)] 34.56 g (80 mmol) and (L ) -Proline benzyl hydrochloride [compound of formula (IV)] 19.34 g (80 mmol) is suspended in 200 ml of dry dichloromethane. The suspension is cooled to 0 ° C. to 5 ° C. and 8.8 ml (8.8 mmol) of N-methylmorpholine and then 18 g (88 mmol) of dicyclohexylcarbodiimide in 50 ml of dry dichloromethane are added. The reaction mixture is maintained at 0 ° C. with stirring for 6 hours. The precipitate is filtered off and washed with dry dichloromethane. The mother liquor is extracted successively with water, 5% aqueous sodium carbonate, 1% aqueous acetic acid and water. Then, it is dried over anhydrous magnesium sulfate and the solvent is distilled off. The oily residue is dissolved in 200 ml of methyl tert-butyl ether and 9.28 g (80 mmol) of maleic acid are added to the solution. After stirring for 3 hours at 0 ° C., the crystalline product is filtered off and washed with methyl-t-butyl ether at 0 ° C. to give 4.82 g (82%) of the title compound; mp 106-107 ° C., [α ] D 25 = -36 ° (c = 1, methanol).
[0012]
Example 2
Represented by [Proline N 2 - (1S) - ( 1- ethoxycarbonyl-3-phenylpropyl) -N 6 - trifluoroacetyl - (L) - lysyl - - (L)] benzyl hydrochloride [formula (II) Compound]
To a suspension of 21.6 g (50 mmol) of the compound of the formula (III) in 250 ml of dry dichloromethane, 20 g (0.2 mol) of phosgene are added at a temperature in the range from −10 ° C. to −20 ° C. The reaction mixture is refluxed for 4 hours, then the solvent and excess phosgene are removed by evaporation and the residue (the equivalent N-carboxylic anhydride) is dissolved in 100 ml of dry dichloromethane. The solution is cooled to 0 ° C. and added to a suspension consisting of 12.2 g (50 mmol) of (L) -proline benzyl ester hydrochloride, 11 ml (50 mmol) N-methylmorpholine and 100 ml dry dichloromethane. During the addition, the temperature is maintained at 0 ° C. and then the reaction mixture is kept at 20 ° C. with stirring for 8 hours. The reaction mixture is extracted successively with water, 5% aqueous potassium carbonate solution, 2% aqueous acetic acid solution and water. The organic layer is dried over anhydrous magnesium sulfate and the solvent is distilled off. The residue is dissolved in 150 ml of diethyl ether and 16.6 ml of 3N hydrochloric acid in ether are added to the solution to give a precipitate of the title compound.
Yield: 23.5 g (76%); mp 55-58 ° C .; [α] D 25 = −35.3 ° (c = 1, methanol).
[0013]
In the above process, the maleate salt of the compound of formula (II) having the same physical properties as obtained in Example 1 can also be prepared. The dibenzoyl tartrate salt of the compound represented by formula (II) can also be produced by the above method; mp 59-64 ° C., [α] D 25 = −76 ° (c = 1, methanol).
[0014]
Example 3
N 2 - (1S) - ( 1- ethoxycarbonyl-3-phenylpropyl) -N 6 - trifluoroacetyl - (L) - lysyl - (L) - compound represented by proline dibenzoyl tartrate [Formula (Ia) ]
A solution of 14.71 g (20 mmol) of the compound of formula (II) in 100 ml of dichloromethane is extracted with 80 ml of 5% aqueous potassium carbonate solution, dried over anhydrous magnesium sulfate and the solvent is distilled off. The residue is dissolved in 100 ml of ethanol and hydrogenated in the presence of 1 g of 10% palladium on carbon. Once 1 equivalent of hydrogen has been taken up (about 15 minutes), the catalyst is filtered off and the filtrate is evaporated to yield 10.5 g (about 100%) of the product as a colorless oil in the form of a base. This can be converted to lisinopril dihydrate (see Example 4) or its dibenzoyltartaric acid without further purification as follows: 2.1 g (4 mmol) of product are dissolved in 10 ml of diethyl ether. To this solution is added 1.5 g (4 mmol) of dibenzoyl- (L) -tartaric acid and the salt is precipitated by the addition of n-hexane. The crystalline salt is filtered off and washed with n-hexane to give 3.45 g (96%) of the title compound: mp 95-97 ° C., [α] D 25 = −64.5 ° (c = 1, methanol).
[0015]
Example 4
Lisinopril dihydrate [compound represented by formula (I)]
A solution of 14.71 g (20 mmol) of the compound of formula (II) in 100 ml of dichloromethane is extracted with 80 ml of 5% aqueous potassium carbonate solution, dried over anhydrous magnesium sulfate and the solvent is distilled off. The residue is dissolved in 100 ml of ethanol and hydrogenated in the presence of 1 g of 10% palladium on carbon. When 1 molar equivalent of hydrogen is taken up, the catalyst is filtered off. The filtrate is concentrated to half volume, cooled to 0 ° C. and 23.4 ml (66 mmol) of 25% aqueous tetramethylammonium hydroxide solution are added to the concentrate. The mixture is maintained at 20-25 ° C. with stirring for 8 hours, then 50 ml of ethanol are added and the pH is adjusted to 6.5 by adding 50% trifluoroacetic acid. The crystalline product is cooled to 0 ° C., filtered off and washed with a mixture of 85% ethanol and water to give 7.85 g of lisinopril dihydrate (89%). mp169-172 ℃, [α] D 25 = -41.2 ° (0.25M zinc acetate).
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU9500770A HU214581B (en) | 1995-03-14 | 1995-03-14 | N2-(1s)-(1-ethoxycarbonyl-3-phenylpropyl)-n6-trifluoro-acetyl-l-lysyl-l-proline-benzilester and process for producing it |
HU9500770 | 1995-03-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08253497A JPH08253497A (en) | 1996-10-01 |
JP3699769B2 true JP3699769B2 (en) | 2005-09-28 |
Family
ID=10986628
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP05733896A Expired - Lifetime JP3699769B2 (en) | 1995-03-14 | 1996-03-14 | Peptide type compound |
Country Status (6)
Country | Link |
---|---|
JP (1) | JP3699769B2 (en) |
AT (1) | AT406372B (en) |
DK (1) | DK175858B1 (en) |
ES (1) | ES2099684B1 (en) |
HU (2) | HU214581B (en) |
PT (1) | PT101847B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1035131B1 (en) * | 1998-09-22 | 2006-11-22 | Kaneka Corporation | Process for the preparation of n2 -(1(s)-carboxy-3-phenylpropyl)-l-lysyl-l-proline |
CN109422797B (en) * | 2017-08-30 | 2023-12-19 | 上海科胜药物研发有限公司 | Preparation method of lisinopril intermediate |
CN109422702B (en) * | 2017-08-30 | 2023-04-18 | 上海科胜药物研发有限公司 | Lisinopril intermediate and purification method thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2028812T3 (en) * | 1986-03-27 | 1992-07-16 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | A PROCEDURE FOR THE PREPARATION OF A DERIVATIVE OF N2- (1-CARBOXI-3-OXO-3-FENILPROPIL) -L-LYSINE. |
JPH01254651A (en) * | 1988-04-04 | 1989-10-11 | Kanegafuchi Chem Ind Co Ltd | N2-(1-carboxy-3-phenylpropyl)-l-lysin derivative and production of lysinopuryl using said compound |
-
1995
- 1995-03-14 HU HU9500770A patent/HU214581B/en unknown
- 1995-03-14 HU HU9702176A patent/HU214579B/en unknown
-
1996
- 1996-03-08 PT PT10184796A patent/PT101847B/en not_active IP Right Cessation
- 1996-03-11 AT AT45796A patent/AT406372B/en not_active IP Right Cessation
- 1996-03-12 DK DK28696A patent/DK175858B1/en not_active IP Right Cessation
- 1996-03-13 ES ES9600609A patent/ES2099684B1/en not_active Expired - Fee Related
- 1996-03-14 JP JP05733896A patent/JP3699769B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
HU214579B (en) | 1998-04-28 |
HU214581B (en) | 1998-04-28 |
ES2099684B1 (en) | 1998-02-16 |
HUT75716A (en) | 1997-05-28 |
HU9702176D0 (en) | 1998-01-28 |
ATA45796A (en) | 1999-09-15 |
PT101847A (en) | 1996-09-30 |
JPH08253497A (en) | 1996-10-01 |
DK28696A (en) | 1996-09-15 |
AT406372B (en) | 2000-04-25 |
HU9500770D0 (en) | 1995-05-29 |
DK175858B1 (en) | 2005-04-11 |
ES2099684A1 (en) | 1997-05-16 |
PT101847B (en) | 1998-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9024028B2 (en) | Methods and compositions for the synthesis of multimerizing agents | |
US4716235A (en) | Process for preparing N-[1(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanyl-L-proline | |
US20090137797A1 (en) | Organic Compounds | |
CZ384697A3 (en) | Process for preparing (s)-3-(aminomethyl)-5-methylhexanes | |
JP2691442B2 (en) | Novel proline derivative | |
JPH07304770A (en) | New benzazepinone derivative | |
JP2560360B2 (en) | Method for producing (+)-biotin | |
JP3699769B2 (en) | Peptide type compound | |
Belanger et al. | The design and synthesis of nonpeptide compounds as mimics of a conformation of methionine-enkephaline | |
JPH06145148A (en) | New benzazepinone derivative | |
EP0614986B1 (en) | Enzymatic racemate cleavage of 2-pipéridine alkylcarboxylates | |
GB2036744A (en) | Eburnane derivatives | |
JP2006525294A (en) | Process for producing 4-hydroxyisoleucine and its derivatives | |
JPH07173153A (en) | 1-(2-amino-5-(1-(triphenylmethyl)-1h-imidazol-4-yl)-1- oxopentyl)piperidine derivative, its preparation and its useas synthesis intermediate | |
JPH11349567A (en) | Production of 3-amino-2-oxo-pyrrolidine, new intermediate and its use | |
JPH026348B2 (en) | ||
JP4057088B2 (en) | Method for producing pyrrolidine derivative | |
WO2024092892A1 (en) | Edoxaban intermediate and preparation method therefor | |
JP4157175B2 (en) | Method for producing 2'-pyrrolidinepropanoic acid derivative | |
HU207711B (en) | Process for producing glutaric acid derivatives | |
JP2003137835A (en) | Method for producing (r)-3-hydroxy-3-(2-phenyl)hexanoic acid | |
CS262693B2 (en) | Process for preparing 1-/3-brom-/2s/-methylpropionyl/pyrrolidin-/2s/-carboxylic acid | |
JPS62132846A (en) | 4-aminobutanoic acid derivative and manufacture | |
JPH07304746A (en) | New benzoazepinecarboxylic acid derivative | |
JPH0259545A (en) | 3-amino-2-hydroxy-1-nitrobutane derivative and production of alpha-hydroxy-beta-amino acid |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20041221 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050315 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050614 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050711 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090715 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100715 Year of fee payment: 5 |