Abstract:
PURPOSE: A method for preparing dexibuprofen salt and a pharmaceutical composition for oral administration containing the same are provided to enhance release rate and to reduce side effect. CONSTITUTION: A method for preparing a dexibuprofen salt comprises: a step of dissolving dexibuprofen and inorganic base or organic base in two kinds of more polar solvent; a step of adding acetone to crystallize; and a step of drying crystal. The inorganic base or organic base is arginine, lysine, histidine, ornithine, NH4OH, NaOH, or KOH. A pharmaceutical composition contains the dexibuprofen salt and pharmaceutically acceptable carrier. A pharmaceutical composition for oral administration is used in the form of tablet, capsule, granule, pill, or liquid.
Abstract:
A novel quinazoline-2,4-dione derivative is provided to have the effects of antioxidation, anticonvulzure, and vasorelaxant and enhance memory and prevent and treat stroke, neurodegenerative disease, Alzheimer disease and epilepsia. A method for manufacturing quinazoline-2,4-dione compound of the chemical formula (I) comprises: a step of reacting a compound of the chemical formula (IV) with amine compound of the chemical formula (V) to obtain a compound of the chemical formula (IX); or a step of reacting a first amine compound of the chemical formula (VI) with compound of the chemical formula (VII) or (VIII) to obtain the compound of the chemical formula (IX); a step of substituting a second amine compound of the chemical formula (IX) with R2, R3 or R2 and R3 to obtain a compound of the chemical formula (Ia); and a step of removing protection group. The compound of the chemical formula (IV) is an ethyl 2-ethoxycarbonylamino benzoate.
Abstract:
본 발명은 해열제, 골관절염 및 류마티스관절염 등의 관절질환과 각종 통증에 우수한 치료 효과를 나타내는 소염진통제로 널리 알려져 있는 화학식 1의 화합물[관용명:아세클로페낙(Aceclofenac)]의 신규 제조방법 및 그 제조 과정에서 중간체로 사용되는 화학식 2의 화합물 및 그의 제조방법에 관한 것이다:
상기식에서, R 1 은 C 1-4 알킬렌이고 R 2 는 C 1-4 알킬이다. 본 발명은 매우 저렴하고 사용이 편리한 산(acid)을 사용하여 선택적으로 가수분해시킴으로써 고수율 및 고순도의 화학식 1의 아세클로페낙을 간편하게 제조할 수 있다.
Abstract:
A method for preparing a dibenzothiepin derivative is provided to obtain the pharmaceutically active dibenzothiepin derivative with high purity and high yield through a simple process. The method for preparing a dibenzothiepin derivative represented by the formula(I) comprises the steps of: (a) reacting a propiophenone represented by the formula(II) with a halogenating agent to obtain a halo-ketone compound represented by the formula(III); (b) reacting the compound(III) with a condensing agent to obtain a cyclized halo-ketone compound represented by the formula(IV); (c) reacting the compound(IV) with an alkylorthoformate to obtain a cyclized haloacetal represented by the formula(V); (d) reacting the compound(V) with a zinc halide to obtain an ester compound represented by the formula(VI); and (e) hydrolyzing the compound(VI) to prepare the compound(I). In the formulae, X is halogen, and R1 is C1-6 alkyl, phenyl or phenyl having a substituent selected from the group consisting of H, halogen, C1-6 alkyl, and hydroxy.
Abstract:
PURPOSE: An intermediate for preparing £2-(2,6-dichloroanilino)phenyl| acetoxyacetic acid (referred as "aceclofenac") used as an anti-inflammatory and analgesic agent, and methods for preparing aceclofenac are provided to improve production yield and purity without a process of waste heavy metal. CONSTITUTION: The intermediate which is used for preparing aceclofenac represented by the formula 1, is represented by the formula 2, wherein R1 and R2 are independent of each other and are an alkyl group of C1-C4. Aceclofenac is prepared by selectively hydrolyzing the intermediate of the formula 2 by using an acid in organic solvent. Preferably, the acid is HCl, H2SO4 or methanesulfonic acid; the solvent is alkyl acetate of C1-C5; and the reaction temperature is 20-40 deg.C. The intermediate of the formula 2 is prepared by reacting the alkali metal salt of compound of the formula 3 with the compound of the formula 4(X-CH2-COO-CH2OR¬1OR¬2) in solvent, wherein R1 and R2 are independent each other and are an alkyl group of C1-C4, and X is a halogen atom. Preferably X is Cl or Br; and the solvent is DMF or DMSO.
Abstract translation:目的:制备2-(2,6-二氯苯胺基)苯基的中间体 用作抗炎和止痛剂的乙酰氧基乙酸(称为“醋氯芬酸”),以及制备醋氯芬酸的方法,以提高生产产率和纯度,而无需重金属废物。 构成:用于制备由式1表示的醋氯芬酸的中间体由式2表示,其中R 1和R 2彼此独立并且是C 1 -C 4的烷基。 通过在有机溶剂中使用酸选择性水解式2的中间体来制备醋氯芬酸。 优选地,酸是HCl,H 2 SO 4或甲磺酸; 溶剂是C1-C5的烷基乙酸酯; 反应温度为20-40℃。 式2的中间体通过使式3的化合物的碱金属盐与式4的化合物(X-CH 2 -COO-CH 2 OR 1 OR 2)在溶剂中反应制备,其中R 1和R 2各自独立地 另外是C1-C4的烷基,X是卤素原子。 优选地,X是Cl或Br; 溶剂为DMF或DMSO。