Abstract:
Huperzine-tacrine hybrids and preparing process thereof is provided to improve inhibiting activity of acetylcholine esterase(AChE) associated with occurrence of neurodegenerative disease, and enhance their production yield. The huperzine-tacrine hybrid derivatives represented by the formula(1) having neurodegenerative disease-treating effect are provided, wherein X is hydrogen, halogen group or C1-C6 alkyl group, m is 1 to 3 and n is 1 or 2; and the neurodegenerative disease is dementia. The precursors of the huperzine-tacrine hybrid derivatives represented by the formula(6) are provided. The process for preparing the huperzine-tacrine hybrid derivatives comprises the steps of: (1) treating chloro acrydine represented by the formula(2) with hydroxylamine to prepare hydroxy compounds represented by the formula(3); (2) oxidizing the compounds of the formula(3) with an oxidizing agent selected from pyridinium chlorochromate(PCC), pyridinium dichromate(PDC), Jone's reagent and manganese dioxide to prepare aldehyde compounds represented by the formula(4); (3) condensing the aldehyde compounds of the formula(4) with pyridineamine represented by the formula(5) by using a molecular sieve to prepare immine, and reducing it to prepare compounds represented by the formula(6); and (4) deprotecting the compounds of the formula(6) by using trimethylsilyl iodide(TMSI).
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:
1-Methyl-[1,2,4]oxadiazol-3- yl-1,2,5,6-tetrahydropyridine derivatives as a muscarinic receptor agonist and a preparation method thereof are provided, which compounds are useful for enhancement of memory, treatment of senile dementia, and prevention and treatment of diseases associated with the central nervous system. The 1-methyl-[1,2,4]oxadiazol-3- yl-1,2,5,6-tetrahydropyridine derivatives represented by formula (1) or pharmaceutically acceptable salts are provided, wherein R is C1-C10 alkyl, C1-C10 alkylamino, amide or 5- or 6-membered aliphatic, aromatic or hetero ring optionally substituted by one selected from halogen atom or C1-C10 alkyl. The method for preparing the 1-methyl-[1,2,4]oxadiazol-3- yl-1,2,5,6-tetrahydropyridine derivatives of formula (1) comprises the steps of: (a) cyclizating N-hydroxy-nicotineamidine of formula (2) and an organic compound of formula (3) to prepare a compound of formula (4); (b) 3-methylating the compound of formula (4) to prepare a compound of formula (5); and (c) reducting the compound of formula (5).
Abstract:
PURPOSE: A process for preparing epothilone derivatives is provided, thereby preparing epothilone derivatives having improved anticancer activity in higher purity and yield, so that the process can be useful for development of anticancer drugs having improved activity. CONSTITUTION: The process for preparing epothilone derivatives of formula (1b) comprises the steps of: (i) aldol condensation reacting ketonic acid derivative of formula (2) with phenylsulfone substituted aldehyde derivative of formula (3) to prepare phenylsulfone substituted hydroxy ketonic acid derivative of formula (4); (ii) removing phenylsulfone(-SO2Ph) from the compound of formula (4) to prepare hydroxy ketonic acid derivative of formula (5) with stereo selectivity; (iii) reacting the compound of formula (5) with thiazole alcohol derivative of formula (6) to prepare ester derivative of formula (7); (iv) double bond binding reaction of the compound of formula (7) using Grubbs catalyst to remove a protecting group(TBS), thereby preparing deoxyepothilone compound of formula (1a); and (v) epoxidation of the deoxyepothilone compound of formula (1a).
Abstract:
PURPOSE: A new oxazole derivative obtained by using amide as a starting material is provided which has a strong antibacterial effect on plant pathogenic bacteria with a small amount, for example Pyricularia oryzae Cavera, Rhizoctonia SolaniAG-1, Botrytis cinerea KCI, Phytophthora infestans or the like. CONSTITUTION: An amid compound(formula II) is refluxed in a solvent of dichloroacetone and ethanol to give chloromethyl oxazole(formula III). A chlorine atom of the chloromethyl oxazole is substituted to an iodine atom by use of sodium iodide and then reacted with 2-(2-hydroxyphenyl)-3-methoxy acrylic acid methylester(formula IV)(in case of A=C) or 2-methoxyimino-(2-hydroxyphenyl)-acetic acid methylester(formula IV)(in case of A=N) to produce an oxazole derivative(formula I).
Abstract:
PURPOSE: A novel agricultural and horticultural bactericide containing a hydrazine dicarboxylic ester derivative is provided, which has excellent bactericidal property selectively to vegetable pathogen. CONSTITUTION: An agricultural and horticultural bactericide comprises a hydrazine dicarboxylic ester derivative having the following formula I, wherein R1 and R2 are same or different and represent hydrogen atom, C1-C6 alkyl, C1-C6 haloalkyl having 1 to 3 of halogen substituents, phenyl, or benzoyl; R3 and R4 are same or different and represent phenyl, phenyl substituted with a substituent selected from the group consisting of halogen atom, C1-C6 alkyl, C1-C6 alkoxy and nitro, benzyl, or cyclohexyl.
Abstract:
본 발명은 이제까지 살균제로 알려진 바 없는 새로운 구조를 가지며, 각종 식물 병원균에 대해 예방효과를 나타내고, 특히 일부 병원균에 대해 선택적으로 우수한 살균력을 나타내는 다음 화학식 1로 표시되는 신규한 메톡시아크릴레이트 또는 메톡시이미노아세테이트를 함유하는 이속사졸린과 이속사졸 화합물에 관한 것이다.
상기 화학식 1에서, A는 CH 또는 질소원자를 나타내고; X는 페닐기, 치환된 페닐기, 티오펜일기 또는 피리딜기를 나타내며, 이때 치환된 페닐의 치환기로는 할로겐원자, 시아노기, 탄소원자수 1 ~ 3의 알킬기 및 탄소원자수 1 ~ 3의 할로알킬기 중에서 선택된 하나 또는 그 이상의 것이고; Y는 메톡시기로서, 이는 Z- 또는 E-배향을 하며;
Abstract:
A phonoxy benzoyl malonic acid ester derivative of formula (I) is prepd. for use as a herbicide. The (I) is prepd. by treating RCHR1 with a base and reacting with acyl halide of formula (III). In the formula; X is nitrogen or carbon; Y is hydrogen, halogen or nitro; Z is chloride or CF3; R is cyano, methyl, alkyl ester or methyl ketone; R1 is cyano, alkyl ester, methyl ester, phenyl sulfone, dimethyl amine or thio phenyl ketone.
Abstract:
본 발명은 사이클로알킬 피롤 및 아졸을 가지는 피페라진 유도체 및 그의 염, 및 이를 포함하는 정신질환의 예방 또는 치료용 약학 조성물에 관한 것으로, 본 발명의 피페라진 유도체는 도파민 D4 수용체에 대하여 우수한 길항 작용을 나타내므로 정신질환의 예방 또는 치료제로서 유용하게 사용될 수 있다:
상기 식에서, R 1 은 , 이고 (여기서, X는 수소, 할로겐, C 1-6 알킬, C 1-6 알콕시 또는 사이아노이고; R은 수소, 또는 할로겐, 나이트로, C 1-6 알킬, C 1-6 알콕시 또는 사이아노로 치환되거나 치환되지 않은 페닐이다.); R 2 는 할로겐, C 1-6 알킬, C 1-6 알콕시 또는 사이아노로 치환되거나 치환되지 않은 페닐 또는 벤질이고; n은 1 내지 3의 정수이다.