Abstract:
PURPOSE: A novel imidazolylalkylcarbonyl derivative which is effective as calcium ion channel regulator is provided to effectively block T-type calcium ion channel, prevent and treat brain diseases, heart diseases and pain. CONSTITUTION: An imidazolylalkylcarbonyl derivative is denoted by chemical formula 1. The imidazolylalkylcarbonyl derivative of chemical formula 1 is prepared by performing amide bond of piperazine derivative of chemical formula 3 with imidazolylalkylcarboxylic acid of chemical formula 2. The amide bond is performed using binder selected from phosphonium system, ammonium system, carbodiimide system, imidazolinium, and organic phosphine system. A method for preparing the imidazolylalkylcarboxylic acid of chemical formula 2 comprises: a step of performing hetero-michael addition reaction of ethy alkenoate with imidazole compound under the presence of KF/Al2O3 catalyst to produce ethoxycarbonylalkylimidazole compound of chemical formula 2a; and a step of hydrolyzing the ethoxycarbonylalkylimidazole compound of chemical formula 2a to prepare imidazolylalkylcarboxylic acid of chemical formula 2.
Abstract translation:目的:提供一种有效阻断T型钙离子通道,预防和治疗脑疾病,心脏病和疼痛的新型咪唑烷基羰基衍生物,作为钙离子通道调节剂有效。 构成:化学式1表示咪唑烷基羰基衍生物。化学式1的咪唑烷基羰基衍生物通过化学式3的哌嗪衍生物与化学式2的咪唑基烷基羧酸的酰胺键进行制备。酰胺键使用选自鏻 系统,铵系统,碳二亚胺系统,咪唑啉鎓和有机膦系统。 制备化学式2的咪唑基烷基羧酸的方法包括:在KF / Al 2 O 3催化剂存在下,进行异丁烯酸乙酯与咪唑化合物的异迈克尔加成反应,生成化学式2a的乙氧基羰基烷基咪唑化合物的步骤; 以及水解化学式2a的乙氧基羰基烷基咪唑化合物以制备化学式2的咪唑基烷基羧酸的步骤。
Abstract:
PURPOSE: Methods for preparing tetrasubstitued pyrazines using baker's yeast are provided, thereby easily and environment-friendly preparing tetrasubstitued pyrazines in water under mild condition. CONSTITUTION: The method for preparing tetrasubstitued pyrazines of formula (2) using baker's yeast comprises the steps of: (1) preparing a solution of baker's yeast; and (2) dissolving beta-keto alpha-oxime carbonyl derivatives of formula (1) in hydrophilic organic solvent and adding the solution into the baker's yeast solution to carry out chemoselective microbial reduction, wherein R1 is methyl, ethyl or phenyl; R2 is hydrogen, methyl or benzyl; R3 is methoxy, ethoxy, benzyloxy or phenylamine; the organic solvent is selected from benzene, toluene and hexane.
Abstract:
The present invention relates to substituted pyrrolidinone compounds of formula 1, wherein n is 0 or 1; Aza is a heterocycle optionally substituted with C1-4 alkyl, or C1-4 alkyl substituted with a heterocycle, which represents a saturated or unsaturated five- or six-membered ring having nitrogen(s) as a heteroatom, which are muscarinic acetylcholine receptor agonists and useful as nootropics and therapeutic agents for cerebral neural diseases such as Alzheimer's disease; and pharmaceutically acceptable salts thereof; processes for the preparation thereof; and pharmaceutical compositions comprising these compounds or salts.
Abstract:
PURPOSE: A tetrahydropyridine derivative having high affinity for muscarine type acetylcholine receiptor is provided, thereby the tetrahydropyridine derivative can be useful as a recognition improving agent and a nervous disease treating agent. CONSTITUTION: The tetrahydropyridine derivative having high affinity for a muscarine type acetylcholine receiptor is represented by formula(1), wherein m is 0 or 1; n is 1 or 2; R1 is hydrogen, C1-4 alkyl, C2-4 alkynyl or aryl; and R3 is C1-4 alkyl. The process for preparing the tetrahydropyridine derivative comprises (i) condensation of a compound of formula(5) with R1ONH2-HCl to prepare a compound of formula(8); and (ii) reacting the compound of formula(8) with alkyl iodide to prepare alkyl pyrimidine salt and reducing the alkyl pyrimidine salt.
Abstract:
PURPOSE: Provided is a method for preparing allylated 7-hydroxycoumarin derivatives effectively and economically in high yield. CONSTITUTION: The method for preparing allylated 7-hydroxycoumarin is characterized by reacting allylhalide of the formula(1) with 7-hydroxycoumarin of the formula(2) to manufacture allylated 7-hydroxycoumarin derivative of the formula(3).