Abstract:
본 발명은 입체선택성이 높은 테트라하이드로퓨란 고리화합물과 이의 제조방법에 관한 것으로서, 트리메틸실라닐페타인올을 출발물질로 하고 루이스산(Lewis acid) 촉매를 이용한 분자간 프린스 고리화 반응을 수행하여 알렌(allene)을 포함하고 있는 입체선택성이 높은 다음 화학식 1로 표시되는 신규의 테트라하이드로퓨란 고리화합물과 이 화합물의 제조방법에 관한 것이다.
상기 화학식 1에서, R 1 은 탄소수 1 내지 8의 알킬기, 또는 방향족기를 나타내고, R 2 및 R 3 는 각각 수소원자, 탄소수 1 내지 8의 알킬기, 또는 방향족기를 나타내고, 상기 R 2 및 R 3 는 서로 결합하여 5 내지 7각형의 고리를 형성한다. 입체선택성, 테트라하이드로퓨란, 트리메틸실라닐페타인올, 알렌(allene), 루이스산 촉매, 분자간 프린스 고리화
Abstract:
PURPOSE: Provided is a method for preparing various types of 2-halo-1,3-diene compounds from allenol with ease by a simple process using no catalyst at a high yield. CONSTITUTION: The method for preparing a 2-halo-1,3-diene represented by formula 3 from an allenol represented by formula 2 comprises treating the allenol with an indium(III) halide salt represented by the formula of InX3 (wherein X is Cl, Br or I), through the reaction route as depicted in the following formula 4. In formulas 2 to 4, each of R1 to R4 represents H, Si, a halogen atom, an alkyl group, an aromatic substituent or a cyclic substituent. In the method, the reaction solvent is selected from acetonitrile and benzene.
Abstract:
A compound represented by a general formula (Ia) or (Ib) and a stereo-selective preparation method thereof using a carbonyl reductase which is separated from Kluyveromyces marxianus. The compound can be prepared by reduction of substituted beta-keto ester and can be used as an intermediate in preparing beta-lactam group antibiotics.
Abstract:
PURPOSE: Provided are Quinuclidine compounds which are useful for treatment of brain-nervous diseases caused by cholinergic neurotransmission such as Alzheimer's disease and a preparation method thereof. CONSTITUTION: A quinuclidine compounds of the formula (I) and pharmaceutically acceptable salts thereof are provided, wherein n is an integer of 1 to 5; R is a substituent on a benzene ring, hydrogen, F, Cl, methoxy, OH, NH2, NO2, 3,4-dimethoxy, 2,4-dimethoxy, cyano, C1-6 alkyl, 1,2 or 3 fluorine substituted C1-6 alkyl, 4-methoxybenzyloxy, t-butoxycarbonyl, C2-6 alkenyl, 1,2 or 3 fluorine substituted C2-6 alkenyl, C2-6 alkynyl, 1,2 or 3 fluorine substituted C2-6 alkynyl, and C3-7 cycloalkyl. A method for preparing the quinuclidine compounds of the formula (I) comprises reacting a compound of the formula (II) with a compound of the formula (III) or (IV), wherein R1 and R2 are independently C1-6 alkyl, aryl or arylalkyl.
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:
The present invention relates to 4,5-dihydroisoxazolylalkylpiperazine derivatives having selective biological activity at dopamine D3 and D4 receptors represented by the following Formula (1), and its preparation method through reductive amination reaction in the presence of reducing agent,wherein R1, R2, X and n are the same as defined in the specification.
Abstract:
PURPOSE: An alkenyl azabicyclic compound and a preparation method thereof are provided, which can be useful for treatment of cerebral nervous diseases caused by choline neurotransmission disorders. CONSTITUTION: An alkenyl azabicyclic compound represented by the formula(I) and pharmaceutically acceptable salts thereof are provided, wherein n is 1 or 2; and R is selected from the group consisting of hydrogen, F, Cl, methoxy, OH, NH2, NO2, 3,4-dimethoxy, 2,4-dimethoxy, cyano, C1-C6 alkyl, 1, 2 or 3 fluorine substituted C1-C6 alkyl, 4-methoxybenzyloxy, t-butoxycarbonyl, C2-C6 alkenyl, 1, 2 or 3 fluorine substituted C2-C6 alkynyl and C3-C7 cyloalkyl. A method for preparing the alkenyl azabicyclic compound of the formula(I) comprises a compound of the formula(II) with a compound of the formula(III) or formula(IV), wherein R1, R2 and R3 are independently C1-C6 alkyl, aryl or arylalkyl.
Abstract:
PURPOSE: A new penam derivative using indium and zinc and a preparation method thereof are provided CONSTITUTION: A novel penam derivative represented by formula(I) is prepared by reacting 6-oxopenam of the formula(I') with ally halide of the formula (II) or acetylene halide of the formula (III) in the presence of indium or zinc. In the formula(I): R1 is allyl derivative and acetylene derivative; R2 is hydrogen, carboxylic acid salt(sodium salt and potassium salt as inorganic salt, alkyl amine salt, aromatic amine salt as organic salt) or carboxy protecting group(4-methoxy benzyl, diphenylmethyl, 4-nitrobenzyl, useful thing as protecting group of molecule in penicillin or cephalosporin compound field); R3 is hydrogen, halogen, hydroxy, acetoxy group.
Abstract:
본 발명은 광범위한 항균력을 지닌 신규한 일반식(I)로 표시되는 프로페닐 세펨계 화합물과 그의 약제학적으로 허용되는 염 및 그 제조 방법에 관한 것으로 입체 구조적으로 syn, anti의 두가지 형태의 이성체를 가질 수 있다. 본 발명은 일반식(III)의 3-클로로메틸 세팔로스포린에 트리페닐포스핀과 요오드를 반응시켜 일반식(IV)의 포스포늄일리드를 제조하는 제1공정 ; 일반식(IV)의 포스포늄일리드를 알데히드 화합물과 비티히반응으로 일반식(V)의 3-클로로프로페닐 화합물을 제조하는 제2공정 ; 일반식(V)의 3-클로로프로페닐화합물을 아세톤 존재하에 염화 요오드와 반응시켜 (E)이성체 프로페닐요오드화합물인 일반식(II)의 3-요오드프로페닐 화합물을 제조하는 제3공정과 ; 일반식(II)의 3-요오드프로페닐 화합물과 일반식(VI)의 피리딘-4-티온 유도체를 용매존재하에 짝지음 반응으로 일반식(VII)의 아세테이트 유도체를 제조하는 제4공정 및 일반식(VII)의 아세테이트 유도체에 아니솔과 트리플루오르아세트산을 사용하는 제5공정으로 이루어진 신규한 일반식(I)로 표시되는 프로페닐 세펨계 화합물을 제조하는 것으로, 본 발명의 화합물들은 그람 양성균이나 그람 음성균에 뛰어난 항균력을 나타내므로 세팔로스포린 화합물계열 의약품에 유용하게 사용할 수 있다.
상기 일반식(I)∼(VII)에 있어서, R 1 은 메톡시기, 히드록시기, 2-플루오르에톡시기를 의미하며 R 2 는 메틸기 또는 수소를 의미하고 R 3 는 벤조기나 수소로서 이중고리구조이거나 단환구조를 의미한다.