Abstract:
PURPOSE: A 4-aminopiperidine analogue and a producing method thereof are provided, therefore the compound can be useful as a ligand of a muscarine receptor, and it is thus used in study on Alzheimer disease. CONSTITUTION: The 4-aminopiperidine analogue is represented by formula(I), wherein R1, R2, R3, R4, R5, R6 and R7 are hydrogen, cycloalkyl having carbon number of 1 to 6, alkoxy, halogen, hydroxy, hydroxymethyl, aryl, heteroaryl, amino, alkylamino, alkenyl, carbonyl or hetero ring having carbon number of 5 to 7 wherein aryl is a ring having 6 atoms, two rings having 10 atoms or a stable resonance form having double bond to adjacent carbon; heteroaryl is a single ring aromatic group having carbon number of 5 to 6 or a double ring aromatic group having carbon number of 10 in which the heteroaryl has at least one hetero atom of N, O or S; hetero ring consists of 5 to 7 atoms having 1 to 3 of N, O or S; X is carbon or sulfur; and n is an integer of 1 to 2 wherein n is 1 when X is carbon and is 2 when X is sulfur. The 4-aminopiperidine analogue is produced by reacting piperidine or amine(II) with piperazine with ketone(III) in the presence of 1 to 3 equivalent of acetic acid, 2 to 10 equivalent of reducing agent and solvent at room temperature for 3 to 24 hours to produce 4-aminopiperidine(I) and adding NaHCO3 solution and organic solvent to 4-aminopiperidine(I); and drying the extracted 4-aminopiperidine(I), dissolving it, adding 1 to 10 equivalent of hydrogen chloride to the solution, and separating, washing and drying the hydrochloride of 4-aminopiperidine.
Abstract:
PURPOSE: Benzoazepine derivatives and a preparation process thereof using indium are provided, thereby rapidly and easily preparing the benzoazepine derivatives using an appropriate amount of indium powder. CONSTITUTION: Benzoazepine derivatives are represented by the formula IV, wherein X is H, F, Cl, Br, I, alkyl or alkoxy. The benzoazepine derivatives represented by the formula III are also provided, wherein R is methyl, ethyl or hydrogen; and X is H, F, Cl, Br, I, alkyl or alkoxy. A process for preparing benzoazepine derivatives of the formula IV comprises the steps of: (1) stirring 2-nitro benzaldehyde derivatives of the formula I and methyl 2-(bromomethyl) acrylate or ethyl 2-(bromomethyl) acrylate in water or aqueous organic solvent, together with indium coil or indium thin layer and acid to prepare a compound of the formula III; and (2) reacting the compound of the formula III with base in an organic solvent, wherein the aqueous organic solvent in the step (1) is tetrahydrofuran solution, acetonitrile solution, N,N-dimethylformamide solution, methylalcohol solution or ethylalcohol solution; the base in the step (2) is sodium hydride, potassium butoxide, sodium bicarbonate, sodium carbonate, potassium carbonate or cesium carbonate; and the organic solvent in the step (2) is tetrahydrofuran, N,N-dimethylformamide, methylsulfoxide, dimethylsulfoxide or dichloromethane.
Abstract:
PURPOSE: Provided is a novel isooxazol piperazin derivative which is used as an antagonist against dopamine-1 receptor related to the central nerve system disorders. CONSTITUTION: A novel isooxazol piperazin derivative represented by the formula (1) is manufactured by reacting secondary amine of the formula (2) with aldehyde of the formula (3) in the presence of NaBh(OAc)3, NaBH3CN, or NaBH4 as a reductant and methylene chloride as a solvent at room temperature for 3-24 hours, preferably 12-14 hours. In the formula (1), n is an integer of between 1 and 4; R1 is a phenyl group at an ortho, meta, or para position substituted by more than one group among halogen, trifluoromethyl, -NO2, alkyl group of C1-C3 , and alkoxy group of C1-C3, or an alkyl group of C1-C3, hydroxy group, 4-(2-keto-1-benzimidazolerynyl), 1-(2-(trifluoromethyl)benzene, 4-(4-chlorophenyl)-4-hydroxy, 1-(2-pyrimidyl), or 1-benzyl group; R2-R5 is hydrogen; R6 is a phenyl group at an ortho, meta, or para position substituted by more than one group among halogen group, trifluoromethyl group , -CN, -NO2, an alkyl group of C1-C3, phenoxy group, and alkoxy group of C1-C3 and an unsaturated 5 or 6 hetero ring group having more than one atom from an alkyl group of C-C3, alkoxy group of C1-C3, thiophenyl group, (2-phenyl)vinyl group, pyridyl group, and from oxygen, sulfur, and nitrogen; and Q is isoxazol (A) or 4,5-dihydroisoxazole derivative (B).
Abstract:
PURPOSE: Benzoazepine derivatives and a preparation process thereof using indium are provided, thereby rapidly and easily preparing the benzoazepine derivatives using an appropriate amount of indium powder. CONSTITUTION: Benzoazepine derivatives are represented by the formula IV, wherein X is H, F, Cl, Br, I, alkyl or alkoxy. The benzoazepine derivatives represented by the formula III are also provided, wherein R is methyl, ethyl or hydrogen; and X is H, F, Cl, Br, I, alkyl or alkoxy. A process for preparing benzoazepine derivatives of the formula IV comprises the steps of: (1) stirring 2-nitro benzaldehyde derivatives of the formula I and methyl 2-(bromomethyl) acrylate or ethyl 2-(bromomethyl) acrylate in water or aqueous organic solvent, together with indium coil or indium thin layer and acid to prepare a compound of the formula III; and (2) reacting the compound of the formula III with base in an organic solvent, wherein the aqueous organic solvent in the step (1) is tetrahydrofuran solution, acetonitrile solution, N,N-dimethylformamide solution, methylalcohol solution or ethylalcohol solution; the base in the step (2) is sodium hydride, potassium butoxide, sodium bicarbonate, sodium carbonate, potassium carbonate or cesium carbonate; and the organic solvent in the step (2) is tetrahydrofuran, N,N-dimethylformamide, methylsulfoxide, dimethylsulfoxide or dichloromethane.
Abstract:
PURPOSE: Indol derivatives and a preparation process thereof are provided, thereby rapidly preparing indol derivatives under mild conditions in higher yield. CONSTITUTION: Indol derivatives are represented by the formula 6, wherein R is H, or halogen selected from Cl, F, Br and I; and Y is -Ts(tosyl), -Ms(mesyl) or -Ac(acetyl). A process for preparing the indol derivatives of the formula 6 comprises the steps of: reacting a compound of the formula 1 with a compound of the formula 2 in the presence of indium metal and acid to simultaneously perform allylation of aldehyde and reduction of nitro group, thereby preparing a compound of the formula 3; protecting amine group of the compound of the formula 3 to prepare a compound of the formula 4; oxidizing secondary alcohol of the compound of the formula 4 to prepare a compound of the formula 5; and cyclization of the compound of the formula 5 in the presence of organic base, wherein the oxidation of secondary alcohol uses pyridinium chlorochromate(PCC) or pyridinium dichromate(PDC) or Swern's oxidation or Dess-Martin periodinane oxidation; and the organic base is diisopropylethylamine, DBU (1,8-diazabicyclo£5.4.0|undec-7-ene), DBN (1,5-diazabicyclo£4.3.0|non-5-ene), triethylamine or pyridine.
Abstract:
PURPOSE: Indol derivatives and a preparation process thereof are provided, thereby rapidly preparing indol derivatives under mild conditions in higher yield. CONSTITUTION: Indol derivatives are represented by the formula 6, wherein R is H, or halogen selected from Cl, F, Br and I; and Y is -Ts(tosyl), -Ms(mesyl) or -Ac(acetyl). A process for preparing the indol derivatives of the formula 6 comprises the steps of: reacting a compound of the formula 1 with a compound of the formula 2 in the presence of indium metal and acid to simultaneously perform allylation of aldehyde and reduction of nitro group, thereby preparing a compound of the formula 3; protecting amine group of the compound of the formula 3 to prepare a compound of the formula 4; oxidizing secondary alcohol of the compound of the formula 4 to prepare a compound of the formula 5; and cyclization of the compound of the formula 5 in the presence of organic base, wherein the oxidation of secondary alcohol uses pyridinium chlorochromate(PCC) or pyridinium dichromate(PDC) or Swern's oxidation or Dess-Martin periodinane oxidation; and the organic base is diisopropylethylamine, DBU (1,8-diazabicyclo£5.4.0|undec-7-ene), DBN (1,5-diazabicyclo£4.3.0|non-5-ene), triethylamine or pyridine.
Abstract:
본 발명은 인듐 금속 및 산을 이용하여 알데히드(-CHO)의 알릴화 및 니트로기(-NO 2 )의 환원 반응을 동시에 행하는 방법에 관한 것이며, 보다 구체적으로는 화학식 1의 화합물을 인듐 금속 및 산의 존재하에 화학식 2의 화합물과 반응시켜 알데히드의 알릴화 반응과 니트로기(-NO 2 )의 아민기(-NH 2 )로의 환원 반응을 동시에 행하여 화학식 3의 화합물을 제조하는 방법에 관한 것이다(반응식 1). 화학식 1
화학식 2
화학식 3
반응식 1
상기 화학식 1 내지 3 및 반응식 1 중에서, R은 C 6 -C 10 방향족 고리를 말하며; R 1 -R 3 은 서로 독립적으로 수소, C 1 -C 6 알킬기, 페닐기 또는 C 1 -C 3 알콕시 카르보닐기를 말하며; k는 0 - 4이며, 각 치환체 Y는 할로겐, 할로겐에 의해 치환된 또는 비치환된 C 1 -C 3 알킬기, 또는 할로겐에 의해 치환된 또는 비치환된 C 1 -C 3 알콕시기이거나, 두 개의 Y가 조합하여 5원 또는 6원 고리 또는 헤테로고리를 형성할 수 있으며; m은 1 - 3이며, n은 1 - 3이며; X은 Cl, Br, I로 구성되는 군에서 선택되는 할로겐 원소를 말한다. 상기 제조방법은 종래의 방법에 비해 알데히드의 알릴화 반응과 니트로기의 환원 반응을 동시에 수행할 수 있으며, 반응 수율이 높고, 반응이 상온에서 짧은 시간내에 진행하고, 수용액 상에서 반응이 손쉽게 진행되므로 환경친화적인 산업공정이다는 장점이 있다.