Abstract:
The beta- or gamma-quinacridone is produced by (a) reacting a diethyl 1,4-dicyclohexanedione-2,5-dicarboxylate of formula (II) with an aniline in the presence of a solvent (toluene or xylene) having a low b.p. and a trifluoro acetic acid catalyst to obtain a diethyl 2,5-dianilino-3,6-dihydroterephthalate of formula (III), (b) reacting the cpd. of (III) in the presence of a xylene solvent at 310-320 deg.C for 1 hr in the high pressure reactor to obtain a beta- 6,13- dihydroquinacridone of formula (IV), and (c) reacting a lower alcohol (methanol or ethanol), a sodium hydroxide soln. and a meta-sodium nitrobenzene sulfonate with the cpd. of (IV).
Abstract:
PURPOSE: A phenylpyrazolyl methyl-2-(4-substituted piperidine-1-yl)acetamide derivative as a calcium ion channel modulator is provided to be used as an agent for preventing and treating heart diseases or pain. CONSTITUTION: A phenylpyrazolyl methyl-2-(4-substituted piperidine-1-yl)acetamide derivative is denoted by chemical formula 1. An agent for preventing and treating heart diseases or an agent for relieving chronic and acute pain contains the compound of chemical formula 1 as an active ingredient.
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。