Abstract:
A (3R)-amino-(4R)-aryl piperidine compound is provided to inhibit generation of beta-amyloid proteins damaging neurons by inhibiting the activity of beta-secretase(BACE), thereby being effectively used for preventing or treating Alzheimer's disease. A (3R)-amino-(4R)-aryl piperidine compound is represented by a formula(I), wherein R^1 is -(CH)n-Ar, -(CH)n-CO-Ar, -(CH)n-SO2-Ar, or -(CH)n-CO-NH-Ar(where n is an integer from 0 to 3, Ar is a group represented by the structural formula(1) or (2); R^2 is H or halogen substituted or unsubstituted phenyl; and R^3 is H, -CO-R^6, -SO2-R^7, -CO-(CH2)m-R^8, -CO-NH-(CH2)m-R^9, -COO-(CH2)m-R^10, -CO-N(R^11)-(CH2)m-COO-R^12, -CO-NH-C(R^13))(R^14)-(CH2)m-COO-R^15 or -CO-C(R^16)(R^17)-NH-COO-(CH2)m-R^18(where each R^6 to R^18 is H, halogen, hydroxy or C1-6 alkyl which may be substituted or unsubstituted by C1-3 alkoxy, C1-3 alkylsulfonyl or the Ar same as defined above the R^1 and m is an integer from 0 to 2). In the structural formula(1) or (2), each Y^1 and Y^2 is independently H, phenyl, phenoxy, C1-3 alkoxy or -CO-N(R^4)R^5(wherein each R^4 and R^5 is independently C1-3 alkyl). A pharmaceutical composition for preventing or treating Alzheimer's disease or Down's syndrome comprises the compound of the formula(1) or a pharmaceutically acceptable salt thereof as an effective ingredient.
Abstract:
본 발명은 다음 화학식 1로 표시되는 후퍼진(huperzine) B 유도체와 이의 제조방법에 관한 것으로서, 더욱 상세하게는 다음 화학식 2로 표시되는 카르복실산 화합물을 출발물질로 사용하고, C5 위치의 카르복실기를 아민화 및 N -알켄일화하여 다음 화학식 4로 표시되는 화합물을 반응 중간체로 합성한 후에, 이 중간체 화합물을 복분해반응(Ring Closing Metathesis, RCM)한 후에 메틸보호기를 제거하는 일련의 제조과정을 거쳐 합성하게 되는, 다음 화학식 1로 표시되는 후퍼진 B 유도체와 이의 제조방법에 관한 것이다. 본 발명에 따른 상기 화학식 1로 표시되는 화합물은 치매치료 효과가 있는 것으로 잘 알려져 있는 후퍼진 B 화합물의 유도체로서 화합물 그 자체의 의약적 활성이 기대된다.
Abstract:
PURPOSE: Provided is a process for preparing pyridone derivative represented by the formula(1) and useful as a therapeutics of Alzheimer's disease(AD). CONSTITUTION: The process for preparing pyridione derivative of the formula(1) comprises the steps of; reacting 1,4-cyclohexanedione monoketal of the formula(2) with secondary amine under acid catalyst; then treating the resultant with propiolamide of the formula(3) to obtain the compound of the formula(1). In the formulae, R1 and R2 represent individually C1-C6 alkyl group or R1 and R2 bind together to form 5-8 membered hetero ring.
Abstract:
PURPOSE: Provided is a method for manufacturing a 5-(4-substituted-£1,2,5|thiadiazol-3-il)-3-methyl-1,2,3,4-tetrahydropyrimidine derivative which is effective on improving memory and treating Alzheimer's disease. CONSTITUTION: A 5-(4-substituted-£1,2,5|thiadiazol-3-il)-3-methyl-1,2,3,4-tetrahydropyrimidine derivative represented by the formula (1) is manufactured by the following steps of: i) reacting 5-pyrimidine carboxylaldehyde of the formula (2) with KCN/HOAc to synthesize hydroxy-pyrimidine-5-il-acetonitrile of the formula (3); ii) reacting hydroxy-pyrimidine-5-il-acetonitrile of the formula (3) with ammonium chloride and ammonium hydroxide to obtain amino-pyrimidine-5-il-acetonitrile of the formula (4) and reacting again amino-pyrimidine-5-il-acetonitrile with S2CL2 to obtain 5-(4-chloro-£1,2,5|thiadiazol-3-il)pyrimidine of the formula (5); iii) reacting 5-(4-chloro-£1,2,5|thiadiazol-3-il)pyrimidine with NaSH and alkylhalide to obtain a compound of the formula (6a); iv) reacting the compound of the formula (6a) with CH3L or methylfluoromethansulfonate at room temperature to obtain 5-(4-substituted sulfanil-£1,2,5|thiadiazol-3-il)-3-methylpyrimidium iodide of the formula (7a); and v) reducing 5-(4-substituted sulfanil-£1,2,5|thiadiazol-3-il)-3-methylpyrimidium iodide with NaBH4 to obtain a 5-(4-substituted-£1,2,5|thiadiazol-3-il)-3-methyl-1,2,3,4-tetrahydropyrimidine derivative. In the formula (1), X is oxygen atom or sulfur atom; R is hydrogen atom, low alkyl group having 1-5 carbon, propargyl group, benzil group, 4-methylbenzil group, or 4-chlorobenzil group.
Abstract:
PURPOSE: Title derivatives are prepared which has a good therapeutic activity of dys-mnesia and senile athymia. CONSTITUTION: Title compounds (formula 1; R is -H, -CH3, -CH2CH3, -CH2(CH2)3CH3, -CH2CH=CH2, etc.) and their pharmaceutical salt are prepared. Thus, 1.24 g of hydroxylamine hydrochloride is dissolved in water, and controlled to pH 7 by NaHCO3 saturated aqueous solution. The solution is refluxed for 2 hours in a mixed solution of 5-acetylpyrimidine and 50 ml of benzene using Dean-Stark column. Obtained solution is concentrated under reduced pressure to give 1.28 g of 1-pyrimidin-5-yl-(E)-ethanone oxime(yield 78 %).