Abstract:
본 발명은 항생제 제조용 치환체로서 사용되는, 피롤리딘 고리로 치환된 피리딘 유도체에 관한 것으로, 본 발명의 신규한 피리딘 유도체는 퀴놀론계, 퀴놀리진계, 카바페넴계, 페넴계 또는 세팔로스포린계 유도체에 치환체로서 결합되어 우수한 항균작용과 광범위한 항균 스펙트럼을 부여한다.
Abstract:
PURPOSE: A method of preparing oxiracetam is provided to make oxiracetam product in high purity and yield. The oxiracetam improves brain functions and therapeutic effect on dementia. CONSTITUTION: In a method of preparing oxiracetam of the formula(1), a tri-amide compound of the formula(2) is first prepared by reacting an organic solvent compound of the formula(4) with an organic solvent compound of the formula(5). A compound of the formula(3) is prepared by sequentially conducting cyclization, decarboxylation and reduction with respect to the compound of the formula(2). The compound of the formula(3) reacts with ammonia under the existence of water or alcohol. In the formulae, R is methyl group or ethyl group, and X is hydroxy group or halide. The cyclization of the compound of the formula(2) is achieved by reaction with hydride or alkoxide at -30-50 deg.C for 1-15 hours.
Abstract:
본 발명은 3-메톡시이미노-4-아미노메틸피롤리딘 유도체의 개선된 제조방법에 관한 것으로서, 1-벤질-3-옥소-4-에톡시카보닐피롤리딘으로부터 퀴놀론 항균제의 7번 위치의 유용한 치환기로 사용되는 하기 화학식 1의 3-메톡시이미노-4-아미노메틸피롤리딘 유도체를 간편하게 고효율로 제조할 수 있다:
상기 식에서, R 1 은 수소, C 1-4 알킬기, 또는 아릴 또는 헤테로아릴기로 치환된 C 1-4 알킬기이고; R 2 는 수소, C 1-4 알킬기, 포르밀기 또는 t-부톡시카보닐기이고; HX는 유기산 또는 무기산을 나타내고; n은 1 내지 3의 정수이다.
Abstract:
PURPOSE: Provided is a preparation method of secondary amide in high purity and yield from tertiary amide by elimination of β-substituted α-arylalkyl group in reaction with protonic acid in organic solvent. The α-arylethylamine or α-aryl-β-substituted ethylamine is used as a nitrogen source in synthesis of biologically active compounds. CONSTITUTION: The synthesis of the secondary amide is characterized by making a tertiary amide represented by the formula(2) react with protonic acid in organic solvent to manufacture a secondary amine represented by the formula(1) by stirring at 10-150 deg.C for 2-24 hours. In the formulae, R1 is C1-5 alkyl, C3-7cycloalkyl, heterocyclic or C6-15 aryl group substituted with one or more groups selected from low alkyl with C1-4, hydroxy, animo, halogen, alkoxy, monoalkylamino, dialkylamino and carboxyl group; R2 is C1-5 alkyl group substituted with more than one group selected from amino, hydroxy, mono alkylamino, alkoxy and halogen; Ar is phenyl or α- or β-naphthyl group substituted by one or more groups selected from halogen, methoxy, carbamoyl, sulfamoyl, nitro group; R3 is C6-15 alkyl, phenyl or heterocyclic group substituted by one or more groups selected from C1-4 low alkyl, hydroxy, amino, halogen, alkoxy, mon alkylamino, dialkyl amino, carboxyl, carbamoyl, sulfamoyl, nitro or cyano group; and R1 and R3 are connected to form a 5 or 6 membered ring. The protonic acid is selected from hydrochloric acid, acetic acid, trifluoroacetic acid and methanesulfonic acid.
Abstract:
PURPOSE: Provided is a preparation method of secondary amide in high purity and yield from tertiary amide by elimination of β-substituted α-arylalkyl group in reaction with protonic acid in organic solvent. The α-arylethylamine or α-aryl-β-substituted ethylamine is used as a nitrogen source in synthesis of biologically active compounds. CONSTITUTION: The synthesis of the secondary amide is characterized by making a tertiary amide represented by the formula(2) react with protonic acid in organic solvent to manufacture a secondary amine represented by the formula(1) by stirring at 10-150 deg.C for 2-24 hours. In the formulae, R1 is C1-5 alkyl, C3-7cycloalkyl, heterocyclic or C6-15 aryl group substituted with one or more groups selected from low alkyl with C1-4, hydroxy, animo, halogen, alkoxy, monoalkylamino, dialkylamino and carboxyl group; R2 is C1-5 alkyl group substituted with more than one group selected from amino, hydroxy, mono alkylamino, alkoxy and halogen; Ar is phenyl or α- or β-naphthyl group substituted by one or more groups selected from halogen, methoxy, carbamoyl, sulfamoyl, nitro group; R3 is C6-15 alkyl, phenyl or heterocyclic group substituted by one or more groups selected from C1-4 low alkyl, hydroxy, amino, halogen, alkoxy, mon alkylamino, dialkyl amino, carboxyl, carbamoyl, sulfamoyl, nitro or cyano group; and R1 and R3 are connected to form a 5 or 6 membered ring. The protonic acid is selected from hydrochloric acid, acetic acid, trifluoroacetic acid and methanesulfonic acid.
Abstract:
PURPOSE: A method of preparing oxiracetam is provided to make oxiracetam product in high purity and yield. The oxiracetam improves brain functions and therapeutic effect on dementia. CONSTITUTION: In a method of preparing oxiracetam of the formula(1), a tri-amide compound of the formula(2) is first prepared by reacting an organic solvent compound of the formula(4) with an organic solvent compound of the formula(5). A compound of the formula(3) is prepared by sequentially conducting cyclization, decarboxylation and reduction with respect to the compound of the formula(2). The compound of the formula(3) reacts with ammonia under the existence of water or alcohol. In the formulae, R is methyl group or ethyl group, and X is hydroxy group or halide. The cyclization of the compound of the formula(2) is achieved by reaction with hydride or alkoxide at -30-50 deg.C for 1-15 hours.
Abstract:
PURPOSE: Provided is a method for preparing 3-methoxyimino-4-aminomethylpyrrolidine derivatives, which are used as a useful substituent for the position No.7 of quinolone antibiotics, from 1-benzyl-3-oxo-4-ethoxycarbo0nylpyrrolidine. CONSTITUTION: The method comprises the steps of: reacting a compound of the formula(2) with oxoamine compound or its salt to prepare a compound of the formula(3); reducing a compound of the formula(3) to prepare a compound of the formula(4); hydrogenating and amine-protecting the compound of the formula(4) to prepare a compound of the formula(5); sulfonating the compound of the formula(5) to prepare a compound of the formula(6); aminating or azidonating the compound of the formula(6) to prepare a compound of the formula(8a) or a compound of the formula(7) respectively; hydrogenating the compound of the formula(7) to prepare a compound of the formula(8a) or reacting the compound of the formula(6) with amide to prepare a compound of the formula(8b); and reacting the compound of the formula(8a) or (8b) with acid to deprotect amine.
Abstract:
PURPOSE: Quinolone type antimicrobial agents and a preparation process thereof are provided, which compounds have improved antimicrobial activity and wide range of antimicrobial spectrum. CONSTITUTION: Quinolone type antimicrobial agents are represented by the formula 1, wherein R1 is C1-4 alkyl, halogen substituted or unsubstituted phenyl, or halogen substituted or unsubstituted C3-6 cycloalkyl; R2 is hydrogen, amino or C1-4 alkyl; R5 is hydrogen, C1-4 alkyl, C1-4 alkyl substituted or unsubstituted amino, or C1-4 alkyl substituted or unsubstituted aminomethyl or aminoethyl; W is nitrogen, CH or CY; Y is halogen, or halogen substituted or unsubstituted C1-4 alkyl or C1-4 alkoxy; and Pyr is 2-, 3- or 4-pyridyl, provided that W and R1 form COCH2CH(CH3), CCH2CH2CH(CH3) or CSCH2CH(CH3) together when W is CH. A process for preparing the quinolone type antimicrobial agents comprises condensation reacting a compound of the formula 2 with a compound of the formula 3, wherein X is halogen; and HA is hydrogen chloride or trifluoroacetic acid.
Abstract:
PURPOSE: Pyrolidinyl derivatives used as substituents for preparing antimicrobial agents are provided, which compounds confer improved antimicrobial activity and wide range of antimicrobial spectrum to quinolone type, quinolizine type, carbapenem type, penem type or cephalosporin type derivatives when coupled with the antimicrobial agents. CONSTITUTION: Pyrolidinyl derivatives are represented by the formulas 1a, 1b and 1c, wherein R1 is hydrogen, C1-5 alkyl, C1-5 alkyl substituted or unsubstituted amino, or C1-5 alkyl substituted or unsubstituted aminomethyl; R2, R3, R4 and R5 are hydrogen, halogen, C1-5 alkyl, amino, nitro or cyano; HX is hydrochloric acid or trifluoroacetic acid; and n is 0, 2 or 3.
Abstract:
PURPOSE: Quinolone type antimicrobial agents and a preparation process thereof are provided, which compounds have improved antimicrobial activity and wide range of antimicrobial spectrum. CONSTITUTION: Quinolone type antimicrobial agents are represented by the formula 1, wherein R1 is C1-4 alkyl, halogen substituted or unsubstituted phenyl, or halogen substituted or unsubstituted C3-6 cycloalkyl; R2 is hydrogen, amino or C1-4 alkyl; R5 is hydrogen, C1-4 alkyl, C1-4 alkyl substituted or unsubstituted amino, or C1-4 alkyl substituted or unsubstituted aminomethyl or aminoethyl; W is nitrogen, CH or CY; Y is halogen, or halogen substituted or unsubstituted C1-4 alkyl or C1-4 alkoxy; and Pyr is 2-, 3- or 4-pyridyl, provided that W and R1 form COCH2CH(CH3), CCH2CH2CH(CH3) or CSCH2CH(CH3) together when W is CH. A process for preparing the quinolone type antimicrobial agents comprises condensation reacting a compound of the formula 2 with a compound of the formula 3, wherein X is halogen; and HA is hydrogen chloride or trifluoroacetic acid.