JP4170405B2 - Method for producing azetidinone derivatives - Google Patents

Method for producing azetidinone derivatives Download PDF

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JP4170405B2
JP4170405B2 JP25537796A JP25537796A JP4170405B2 JP 4170405 B2 JP4170405 B2 JP 4170405B2 JP 25537796 A JP25537796 A JP 25537796A JP 25537796 A JP25537796 A JP 25537796A JP 4170405 B2 JP4170405 B2 JP 4170405B2
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group
carbon atoms
lutidine
substituted
atom
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JPH1087657A (en
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宣夫 松井
晃 吉田
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Nippon Soda Co Ltd
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Nippon Soda Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/55Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups

Description

【0001】
【産業上の利用分野】
本発明は優れた抗菌作用を有するカルバペネム系抗生物質の中間体として有用なアゼチジノン誘導体の製造方法に関する。
【0002】
【従来の技術】
優れた抗菌剤であるカルバペネム系抗生物質を製造するための中間体として化合物〔III 〕
【化3】

Figure 0004170405
が示されている(特許公報 平5−24155号、Heterocycles,vol.21(1),29−40(1984)等)。この化合物は通常カルボン酸誘導体〔IV〕
【化4】
Figure 0004170405
とカルボニルジイミダゾ−ルとの反応(Heterocycles,vol.21(1),29−40(1984)等)、あるいはカルボン酸活性化剤と反応させ酸ハライド、混合酸無水物等を経てイミダゾ−ルと反応させる方法(特開平5−201967)または式〔V〕
【化5】
Figure 0004170405
(r1 ,r2 は同一または相異なって、水素、低級アルキル基、アラルキル基を示す。)で表されるアミド化合物と直接イミダゾ−ルと反応させる方法(Tetrahedoron Letters,Vol.30,No.11,1345−1348(1989)、特開昭63−284176等)が知られている。
【0003】
【発明が解決しようとする課題】
カルボン酸誘導体〔IV〕は通常アミド化合物〔V〕を加水分解する事により得られることから、このアミド化合物から直接製造する方法はカルボン酸誘導体を経由する方法に比べ有利な方法である。この優位性を活かし直接イミダゾ−ルと反応する例としてアセトニトリル中還流下での反応(TetrahedoronLetters,Vol.30,No.11,1345−1348(1989))、あるいは室温での反応(特開昭63−284176)がある。 しかしながら、単にイミダゾ−ル等とアミド化合物を混合して反応させるだけではその反応速度は遅く、副反応等により収率の低下は避けられない。また、特開昭63−284176に記載の室温の反応では、反応は完結していない。
【0004】
【課題を解決するための手段】
本発明者らは、このような状況下、反応時間のを短縮化、副反応の抑制等による効率的な製造方法を鋭意検討した結果、本発明を完成するに至った。
【0005】
即ち、本発明は式〔I〕
【化6】
Figure 0004170405
(式中、R1 は水素または容易に除去できるアミノ基の保護基を、R2 は保護されていてもよい水酸基で置換されていてもよい低級アルキル基を、R3 は水素原子もしくは低級アルキル基をR4 、R5 、R6 、R7 は同一もしくは相異なって水素、置換基を有してもよい低級アルキル基を、Xは硫黄原子または酸素原子を表す。)で表される化合物をピリジン誘導体の存在下、イミダゾールと反応させることを特徴とする式〔II〕
【化7】
Figure 0004170405
(式中、R1 、R2 、R3 は前記と同じ意味を示す。)で表される化合物の製造方法である。
【0006】
【発明の実施の形態】
1 の保護基としては一般にNを保護するために用いられている保護基が使用できる。その具体例としては、トリメチルシリル、トリエチルシリル、t−ブチルジメチルシリル、トリイソプロピルシリル、ジメチルヘキシルシリル、t−ブチルジフェニルシリル等のトリ置換シリル基、置換されていてもよいベンジル基(置換基としてはニトロ基、低級アルコキシ基等が挙げられる。)、低級アルコキシカルボニル基、ハロゲノ低級アルコキシカルボニル基、置換されていてもよいベンジルオキシカルボニル基(置換基としてはニトロ基、低級アルコキシ基等が挙げられる。)、アセチル基、ベンゾイル基等のアシル基等が挙げられる。ここで用いられる低級アルコキシ基における低級アルキルとは炭素数1−8の直鎖または枝分かれのアルキル基を示し、ベンジル基、ベンソイル基の置換基の個数、位置は任意である。)
【0007】
2 のアルキル基としては、メチル、エチル、n−プロピル、i−プロピル、s−ブチル、n−ブチル、t−ブチル等の炭素数1〜6の直鎖又は枝分かれの低級アルキル基が挙げられる。
2 における水酸基の保護基としては一般に水酸基を保護するのに用いられている保護基が使用できる。その具体例としては、トリメチルシリル、トリエチルシリル、t−ブチルジメチルシリル、トリイソプロピルシリル、ジメチルヘキシルシリル、t−ブチルジフェニルシリル等のトリ置換シリル基、置換されていてもよいベンジル基(置換基としてはニトロ基、低級アルコキシ基等が挙げられる。)、低級アルコキシカルボニル基、ハロゲノ低級アルコキシカルボニル基、置換されていてもよいベンジルオキシカルボニル基(置換基としてはニトロ基、低級アルコキシ基等が挙げられる。)、アセチル基、ベンゾイル基等のアシル基、トリフェニルメチル基、テトラヒドロピラニル基等が挙げられる。
【0008】
3 のアルキル基としては、メチル、エチル、n−プロピル、i−プロピル、n−ブチル、s−ブチル、i−ブチル、t−ブチル等の炭素数1−6までの直鎖もしくは枝分かれの低級アルキル基が挙げられる。
【0009】
4 、R5 、R6 、R7 の低級アルキル基としてはメチル、エチル、n−プロピル、i−プロピル、ブチル等の炭素数1−6のアルキル基が、その置換基としては、炭素数1−6の低級アルキルオキシ基、フェニル基、塩素、臭素等のハロゲン原子挙げられる。
【0010】
ピリジン誘導体としては、4−ジメチルアミノピリジン、4−ピロリジノピリジン等の置換アミノピリジン;2−ピコリン、3−ピコリン、4−ピコリン、2、3−ルチジン、2、4−ルチジン、2、5−ルチジン、2、6−ルチジン、3、4−ルチジン、3、5−ルチジン、2、4、6−コリジン等の低級アルキル置換ピリジン、2−メトキシピリジン、3−メトキシピリジン、4−メトキシピリジン、2、6−ジメトキシピリジン等の低級アルコキシ置換ピリジン等が挙げられる。
【0011】
反応は化合物〔I〕を溶媒に溶解または懸濁し、化合物〔II〕及びピリジン誘導体を加え、10−100℃好ましくは20−80℃にて反応させる事により行われる。
【0012】
化合物〔II〕の使用量は化合物〔I〕に対し1−5倍モルである。
【0013】
ピリジン誘導体の使用量は化合物〔I〕に対し、0.001から0.5倍モルである。
【0014】
溶媒は反応に関与しなければ特に限定されないが、例えばベンゼン、トルエン、キシレンあるいはクロルベンゼン等の芳香族炭化水素系溶媒、アセトン、メチルエチルケトン、ジエチルケトン、イソブチルメチルケトン等のケトン系溶媒、酢酸メチル、酢酸エチル、酢酸プロピル、酢酸ブチル、プロピオン酸メチル等のエステル系溶媒、塩化メチレン、クロロホルム、ジクロロエタン等のハロゲン系溶媒、ヘキサン、ヘプタン等の炭化水素系溶媒、アセトニトリル、ベンゾニトリル等のニトリル系溶媒、ジイソプロピルエ−テル、ジオキサン、テトラヒドロフラン等のエ−テル系溶媒、ジメチルスルホキシド、ジメチルホルムアミド等が挙げられ、これらを混合してもよい。特にアセトニトリル、テトラヒドロフラン、酢酸エステル類が好適に使用される。
【0015】
化合物〔I〕は公知であり、例えばTetrahedoron Letters,Vol.30,No.11,1345−1348(1989)、Tetrahedoron Letters,Vol.27,No.47,5687−5690(1986)、特開昭63−284176等に示される方法により得られ、また生成する化合物〔II〕も公知であり、この化合物の生成の確認はHPLC,NMRにより行った。
【0016】
【実施例】
次に実施例を挙げ本発明をさらに詳細に説明する。
実施例1
(3S,4R)−3−〔(1R)−1−t−ブチルジメチルシリルオキシエチル〕−4−〔(1R)−1−イミダゾリルエチル〕アゼチジン−2−オンの製造
【化8】
Figure 0004170405
(3S,4R)−3−〔(1R)−1−t−ブチルジメチルシリルオキシエチル〕−4−〔(1R)−1−(4,4−ジメチル−2−チオキソチアゾリジン−3−イル)エチル〕アゼチジン−2−オン17.23g(40mmol)と酢酸エチル80mlの混合溶液にイミダゾ−ル3.81g(56mmol)、4−ジメチルアミノピリジン0.244g(2mmol)を加え、60℃で反応を行った。反応はほぼ4時間で終了した。反応溶液を冷却し、HPLCで分析したところ目的物13.77g(39.2mmol)を含有していた。
【0017】
実施例2
(3S,4R)−3−〔(1R)−1−t−ブチルジメチルシリルオキシエチル〕−4−〔(1R)−1−イミダゾリルエチル〕アゼチジン−2−オンの製造
【化9】
Figure 0004170405
(3S,4R)−3−〔(1R)−1−t−ブチルジメチルシリルオキシエチル〕−4−〔(1R)−1−(4,4−ジメチル−2−チオキソチアゾリジン−3−イル)エチル〕アゼチジン−2−オン17.23g(40mmol)と酢酸エチル80mlの混合溶液にイミダゾ−ル3.81g(56mmol)、4−ジメチルアミノピリジン0.976g(8mmol)を加え、60℃で反応を行った。反応はほぼ2時間で終了した。反応溶液を冷却し、HPLCで分析したところ目的物13.70g(39mmol)を含有していた。
【0018】
比較例
(3S,4R)−3−〔(1R)−1−t−ブチルジメチルシリルオキシエチル〕−4−〔(1R)−1−イミダゾリルエチル〕アゼチジン−2−オンの製造
【化10】
Figure 0004170405
4−ジメチルアミノピリジンを加えない以外は実施例1及び2と同様に反応を行った。未反応原料が1mol%前後になるまでに8時間以上要した。反応溶液を冷却し、HPLCで分析したところ目的物13.08g(37.1mmol)を含有していた。
【0019】
参考例1
(3S,4R)−3−〔(1R)−1−ヒドロキシエチル〕−4−〔(1R)−1−メチル−3−p−ニトロベンジルオキシカルボニル−2−オキソプロピル〕アゼチジン−2−オンの合成
【化11】
Figure 0004170405
実施例1で合成した(3S,4R)−3−〔(1R)−1−t−ブチルジメチルシリルオキシエチル〕−4−〔(1R)−1−イミダゾリルエチル〕アゼチジン−2−オン 13.77g相当の酢酸エチル溶液を、p−ニトロベンジルマロン酸ハ−フエステル13.39g,酢酸エチル80ml,無水塩化マグネシウム3.62gの混合液に15−20℃でトリエチルアミン6.23gを滴下して予め調整したマグネシウムマロネ−ト溶液に加え、50℃で2.3時間反応させた。反応終了後水洗して酢酸エチル層をHPLCで分析して表題の化合物17.4gを含有していた。
【0020】
【発明の効果】
本発明は優れた抗菌作用を有するカルバペネム系抗生物質の中間体として有用なアゼチジノン誘導体をピリジン系触媒を用いることにより反応速度を速めて、短時間に収率よく製造することができる。[0001]
[Industrial application fields]
The present invention relates to a method for producing an azetidinone derivative useful as an intermediate of a carbapenem antibiotic having an excellent antibacterial action.
[0002]
[Prior art]
Compound [III] as an intermediate to produce carbapenem antibiotics, which are excellent antibacterial agents
[Chemical 3]
Figure 0004170405
(Patent Publication No. Hei 5-24155, Heterocycles, vol. 21 (1), 29-40 (1984), etc.). This compound is usually a carboxylic acid derivative [IV].
[Formula 4]
Figure 0004170405
Reaction with carbonyldiimidazole (Heterocycles, vol. 21 (1), 29-40 (1984), etc.), or reaction with a carboxylic acid activator via acid halide, mixed acid anhydride, etc. (Japanese Patent Laid-Open No. 5-201967) or formula [V]
[Chemical formula 5]
Figure 0004170405
(R 1 and r 2 are the same or different and each represents hydrogen, a lower alkyl group, or an aralkyl group.) A method of directly reacting an amide compound with imidazole (Tetrahedron Letters, Vol. 30, No. 3). 11, 1345-1348 (1989), Japanese Patent Laid-Open No. 63-284176, etc.).
[0003]
[Problems to be solved by the invention]
Since the carboxylic acid derivative [IV] is usually obtained by hydrolyzing the amide compound [V], the method of producing directly from the amide compound is an advantageous method as compared with the method via the carboxylic acid derivative. Examples of direct reaction with imidazole taking advantage of this advantage include reaction under reflux in acetonitrile (Tetrahedron Letters, Vol. 30, No. 11, 1345-1348 (1989)), or reaction at room temperature (JP-A-63). -284176). However, the reaction rate is slow only by mixing and reacting imidazole or the like with an amide compound, and a decrease in yield is unavoidable due to side reactions and the like. Further, the reaction at room temperature described in JP-A-63-284176 is not complete.
[0004]
[Means for Solving the Problems]
Under these circumstances, the present inventors diligently studied an efficient production method by shortening the reaction time and suppressing side reactions, and as a result, the present invention has been completed.
[0005]
That is, the present invention relates to the formula [I]
[Chemical 6]
Figure 0004170405
(Wherein R 1 represents hydrogen or a protective group for an easily removable amino group, R 2 represents a lower alkyl group which may be substituted with an optionally protected hydroxyl group, and R 3 represents a hydrogen atom or a lower alkyl group. R 4 , R 5 , R 6 and R 7 are the same or different and each represents a hydrogen or a lower alkyl group which may have a substituent, and X represents a sulfur atom or an oxygen atom. Is reacted with imidazole in the presence of a pyridine derivative [II]
[Chemical 7]
Figure 0004170405
(Wherein R 1 , R 2 and R 3 have the same meaning as described above).
[0006]
DETAILED DESCRIPTION OF THE INVENTION
As the protecting group for R 1, a protecting group generally used for protecting N can be used. Specific examples thereof include tri-substituted silyl groups such as trimethylsilyl, triethylsilyl, t-butyldimethylsilyl, triisopropylsilyl, dimethylhexylsilyl, t-butyldiphenylsilyl, and optionally substituted benzyl groups (as substituents Nitro group, lower alkoxy group, etc.), lower alkoxycarbonyl group, halogeno lower alkoxycarbonyl group, optionally substituted benzyloxycarbonyl group (substituents include nitro group, lower alkoxy group, etc.). ), Acyl groups such as acetyl group and benzoyl group. The lower alkyl in the lower alkoxy group used here represents a linear or branched alkyl group having 1 to 8 carbon atoms, and the number and position of the substituents of the benzyl group and the benzoyl group are arbitrary. )
[0007]
Examples of the alkyl group for R 2 include linear or branched lower alkyl groups having 1 to 6 carbon atoms such as methyl, ethyl, n-propyl, i-propyl, s-butyl, n-butyl, and t-butyl. .
As the hydroxyl-protecting group for R 2 , a protecting group generally used for protecting a hydroxyl group can be used. Specific examples thereof include tri-substituted silyl groups such as trimethylsilyl, triethylsilyl, t-butyldimethylsilyl, triisopropylsilyl, dimethylhexylsilyl, t-butyldiphenylsilyl, and optionally substituted benzyl groups (as substituents Nitro group, lower alkoxy group, etc.), lower alkoxycarbonyl group, halogeno lower alkoxycarbonyl group, optionally substituted benzyloxycarbonyl group (substituents include nitro group, lower alkoxy group, etc.). ), Acyl groups such as acetyl group and benzoyl group, triphenylmethyl group, tetrahydropyranyl group and the like.
[0008]
Examples of the alkyl group for R 3 include straight chain or branched lower groups having 1 to 6 carbon atoms such as methyl, ethyl, n-propyl, i-propyl, n-butyl, s-butyl, i-butyl, t-butyl and the like. An alkyl group is mentioned.
[0009]
The lower alkyl group for R 4 , R 5 , R 6 and R 7 is an alkyl group having 1 to 6 carbon atoms such as methyl, ethyl, n-propyl, i-propyl, butyl, etc. And halogen atoms such as 1-6 lower alkyloxy group, phenyl group, chlorine, bromine and the like.
[0010]
Examples of pyridine derivatives include substituted aminopyridines such as 4-dimethylaminopyridine and 4-pyrrolidinopyridine; 2-picoline, 3-picoline, 4-picoline, 2,3-lutidine, 2,4-lutidine, and 2,5- Lower alkyl substituted pyridines such as lutidine, 2,6-lutidine, 3,4-lutidine, 3,5-lutidine, 2,4,6-collidine, 2-methoxypyridine , 3-methoxypyridine, 4-methoxypyridine, 2 And lower alkoxy-substituted pyridines such as 6-dimethoxypyridine.
[0011]
The reaction is carried out by dissolving or suspending compound [I] in a solvent, adding compound [II] and a pyridine derivative, and reacting at 10-100 ° C, preferably 20-80 ° C.
[0012]
The usage-amount of compound [II] is 1-5 times mole with respect to compound [I].
[0013]
The amount of the pyridine derivative used is 0.001 to 0.5 times mol of the compound [I].
[0014]
The solvent is not particularly limited as long as it does not participate in the reaction, but for example, aromatic hydrocarbon solvents such as benzene, toluene, xylene or chlorobenzene, ketone solvents such as acetone, methyl ethyl ketone, diethyl ketone, isobutyl methyl ketone, methyl acetate, Ester solvents such as ethyl acetate, propyl acetate, butyl acetate and methyl propionate, halogen solvents such as methylene chloride, chloroform and dichloroethane, hydrocarbon solvents such as hexane and heptane, nitrile solvents such as acetonitrile and benzonitrile, Examples include ether solvents such as diisopropyl ether, dioxane, and tetrahydrofuran, dimethyl sulfoxide, dimethylformamide, and the like. In particular, acetonitrile, tetrahydrofuran, and acetates are preferably used.
[0015]
Compound [I] is known and is described in, for example, Tetrahedoron Letters, Vol. 30, no. 11, 1345-1348 (1989), Tetrahedoron Letters, Vol. 27, no. 47, 5687-5690 (1986), Japanese Patent Application Laid-Open No. 63-284176, etc., and the resulting compound [II] is also known, and the production of this compound was confirmed by HPLC and NMR.
[0016]
【Example】
EXAMPLES Next, an Example is given and this invention is demonstrated further in detail.
Example 1
Preparation of (3S, 4R) -3-[(1R) -1-t-butyldimethylsilyloxyethyl] -4-[(1R) -1-imidazolylethyl] azetidin-2-one
Figure 0004170405
(3S, 4R) -3-[(1R) -1-t-butyldimethylsilyloxyethyl] -4-[(1R) -1- (4,4-dimethyl-2-thioxothiazolidin-3-yl) Ethyl] azetidin-2-one 17.23 g (40 mmol) and ethyl acetate 80 ml were mixed with imidazole 3.81 g (56 mmol) and 4-dimethylaminopyridine 0.244 g (2 mmol), and the reaction was conducted at 60 ° C. went. The reaction was completed in approximately 4 hours. When the reaction solution was cooled and analyzed by HPLC, it contained 13.77 g (39.2 mmol) of the desired product.
[0017]
Example 2
Preparation of (3S, 4R) -3-[(1R) -1-t-butyldimethylsilyloxyethyl] -4-[(1R) -1-imidazolylethyl] azetidin-2-one
Figure 0004170405
(3S, 4R) -3-[(1R) -1-t-butyldimethylsilyloxyethyl] -4-[(1R) -1- (4,4-dimethyl-2-thioxothiazolidin-3-yl) Ethyl] azetidin-2-one 17.23 g (40 mmol) and ethyl acetate 80 ml were mixed with imidazole 3.81 g (56 mmol) and 4-dimethylaminopyridine 0.976 g (8 mmol), and the reaction was conducted at 60 ° C. went. The reaction was completed in approximately 2 hours. When the reaction solution was cooled and analyzed by HPLC, it contained 13.70 g (39 mmol) of the desired product.
[0018]
Comparative Example (3S, 4R) -3-[(1R) -1-t-butyldimethylsilyloxyethyl] -4-[(1R) -1-imidazolylethyl] azetidin-2-one Preparation
Figure 0004170405
The reaction was carried out in the same manner as in Examples 1 and 2 except that 4-dimethylaminopyridine was not added. It took 8 hours or more for the unreacted raw material to reach around 1 mol%. When the reaction solution was cooled and analyzed by HPLC, it contained 13.08 g (37.1 mmol) of the desired product.
[0019]
Reference example 1
(3S, 4R) -3-[(1R) -1-hydroxyethyl] -4-[(1R) -1-methyl-3-p-nitrobenzyloxycarbonyl-2-oxopropyl] azetidin-2-one Synthesis
Figure 0004170405
(3S, 4R) -3-[(1R) -1-t-butyldimethylsilyloxyethyl] -4-[(1R) -1-imidazolylethyl] azetidin-2-one synthesized in Example 1 13.77 g The corresponding ethyl acetate solution was prepared in advance by adding 6.23 g of triethylamine dropwise at 15-20 ° C. to a mixed solution of 13.39 g of p-nitrobenzylmalonic acid half ester, 80 ml of ethyl acetate and 3.62 g of anhydrous magnesium chloride. The resultant was added to the magnesium malonate solution and reacted at 50 ° C. for 2.3 hours. After completion of the reaction, it was washed with water and the ethyl acetate layer was analyzed by HPLC to contain 17.4 g of the title compound.
[0020]
【The invention's effect】
In the present invention, an azetidinone derivative useful as an intermediate of a carbapenem antibiotic having an excellent antibacterial action can be produced in high yield in a short time by using a pyridine catalyst to increase the reaction rate.

Claims (1)

式〔I〕
Figure 0004170405
〔式中、Rは、水素原子;トリメチルシリル基、トリエチルシリル基、t−ブチルジメチルシリル基、トリイソプロピルシリル基、ジメチルヘキシルシリル基若しくはt−ブチルジフェニルシリル基のいずれかのトリ置換シリル基;ニトロ基若しくは炭素数1〜8のアルコキシ基で置換されていてもよいベンジル基;炭素数1〜8のアルコシキシカルボニル基;炭素数1〜8のハロゲノアルコキシカルボニル基;ニトロ基若しくは炭素数1〜8のアルコキシ基で置換されていてもよいベンジルオキシカルボニル基;またはアシル基;を表す。
は、(トリ置換シリル基;ニトロ基若しくは炭素数1〜8のアルコキシ基で置換されていてもよいベンジル基;炭素数1〜8のアルコシキシカルボニル基;炭素数1〜8のハロゲノアルコキシカルボニル基;ニトロ基若しくは炭素数1〜8のアルコキシ基で置換されていてもよいベンジルオキシカルボニル基;アシル基;トリフェニルメチル基;またはテトラヒドロピラニル基;で保護されていてもよい水酸基)で置換されていてもよい、炭素数1〜6の直鎖または枝分かれのアルキル基を表す。
は水素原子もしくは炭素数1〜6のアルキル基を表す。
、R、R、Rは同一もしくは相異なって、水素原子;炭素数1〜6のアルキル基、フェニル基、ハロゲン原子で置換されていてもよい炭素数1〜6のアルキル基を表す。
Xは硫黄原子または酸素原子を表す。〕
で表される化合物を、4−ジメチルアミノピリジン、4−ピロリジノピリジン、2−ピコリン、3−ピコリン、4−ピコリン、2,3−ルチジン、2,4−ルチジン、2,5−ルチジン、2,6−ルチジン、3,4−ルチジン、3,5−ルチジン、2,4,6−コリジン、2−メトキシピルジン、3−メトキシピリジン、4−メトキシピリジン、または2,6−ジメトキシピリジンのいずれかのピリジン誘導体の存在下、
イミダゾールと反応させることを特徴とする、式〔II〕
Figure 0004170405
(式中、R、R、Rは前記と同じ意味を示す。)で表される化合物の製造法。
Formula [I]
Figure 0004170405
[Wherein, R 1 represents a hydrogen atom; a tri-substituted silyl group of any one of a trimethylsilyl group, a triethylsilyl group, a t-butyldimethylsilyl group, a triisopropylsilyl group, a dimethylhexylsilyl group, and a t-butyldiphenylsilyl group; A nitro group or a benzyl group optionally substituted by an alkoxy group having 1 to 8 carbon atoms; an alkoxycarbonyl group having 1 to 8 carbon atoms; a halogenoalkoxycarbonyl group having 1 to 8 carbon atoms; a nitro group or 1 carbon atom A benzyloxycarbonyl group which may be substituted with an alkoxy group of ˜8; or an acyl group.
R 2 represents (tri-substituted silyl group; nitro group or benzyl group optionally substituted by an alkoxy group having 1 to 8 carbon atoms; alkoxy group having 1 to 8 carbon atoms; halogeno having 1 to 8 carbon atoms; An alkoxycarbonyl group; a benzyloxycarbonyl group optionally substituted with a nitro group or an alkoxy group having 1 to 8 carbon atoms; an acyl group; a triphenylmethyl group; or a tetrahydropyranyl group; a hydroxyl group optionally protected) Represents a linear or branched alkyl group having 1 to 6 carbon atoms which may be substituted with
R 3 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
R 4 , R 5 , R 6 and R 7 are the same or different and are a hydrogen atom; an alkyl group having 1 to 6 carbon atoms, a phenyl group, or an alkyl group having 1 to 6 carbon atoms which may be substituted with a halogen atom. Represents.
X represents a sulfur atom or an oxygen atom. ]
4-dimethylaminopyridine, 4-pyrrolidinopyridine, 2-picoline, 3-picoline, 4-picoline, 2,3-lutidine, 2,4-lutidine, 2,5-lutidine, 2 , 6-lutidine, 3,4-lutidine, 3,5-lutidine, 2,4,6-collidine, 2-methoxypyridine, 3-methoxypyridine, 4-methoxypyridine, or 2,6-dimethoxypyridine In the presence of such pyridine derivatives,
Formula (II), characterized by reacting with imidazole
Figure 0004170405
(Wherein R 1 , R 2 and R 3 have the same meaning as described above).
JP25537796A 1996-09-06 1996-09-06 Method for producing azetidinone derivatives Expired - Fee Related JP4170405B2 (en)

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US7754318B2 (en) 2005-06-16 2010-07-13 The Nippon Synthetic Chemical Industry Co., Ltd. Water-soluble film

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WO2004035539A1 (en) * 2002-10-18 2004-04-29 Meiji Seika Kaisha, Ltd. Process for producing carbapenem derivative and intermediate for use in the production
WO2008020597A1 (en) * 2006-08-15 2008-02-21 Meiji Seika Kaisha, Ltd. Method for producing 1-methylcarbapenem production intermediate
CN102137865A (en) * 2008-07-30 2011-07-27 兰贝克赛实验室有限公司 Process for the preparation of carbapenem compounds
CA2732619A1 (en) * 2008-07-30 2010-02-04 Ranbaxy Laboratories Limited Process for the preparation of carbapenem compounds

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7754318B2 (en) 2005-06-16 2010-07-13 The Nippon Synthetic Chemical Industry Co., Ltd. Water-soluble film

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