Abstract:
본 발명은 몬테루카스트산 또는 그 나트륨염의 신규한 제조 방법 및 이를 위한 치오락톤 중간체와 몬테루카스트산 아민염 중간체에 관한 것으로서, 보다 상세하게는, 5-치아스피로[2,4]헵탄-6-온 중간체와 몬테루카스트산의 아민류 염 중간체를 사용함으로써 부반응을 최소화하고 정제효과를 높여 유연물질의 발생을 현저히 낮출 수 있고, 이에 따라 고순도의 품질과 높은 수율로 몬테루카스트산 또는 그 나트륨염을 대량생산할 수 있는 신규한 제조 방법에 관한 것이다. 몬테루카스트, 류코트리엔 억제제, 치오락톤, 아민염
Abstract:
PURPOSE: A novel method for preparing montelukast acid or sodium salt using an intermediate is provided to minimize side reaction and to enhance purification effect. CONSTITUTION: A compound of chemical formula 1a is prepared by reacting compound of chemical formulas 2 and 3 and nucleophile. The nucleophile is sodium hydroxide or potassium hydroxide. The compound of chemical formula 1a is also prepared by reacting compounds of chemical formulas 2 and 3 with alkali metal (C1-C4)alkoxide as a nucleophile to obtain a compound of chemical formula 1c and hydrolyzing the compound of chemical formula 1c.
Abstract:
PURPOSE: A ziprasidone hydrochloride 1.5 hydrate with novel crystal and a method for preparing the same are provided to ensure 99.5% or more of crystal purity and high stability. CONSTITUTION: A method for preparing crystalline ziprasidone hydrochloride 1.5 hydrate comprises: a step of recrystalizing ziprasidone base in a solvent containing 1-methyl-2-pyrrolidone or dimethylsulfoxide; a step of adding t-butylmethyl ether, buthylmethyl ether and sec-butylmethyl ether or mixture thereof to prepare slurry; and a step of obtaining crystalline ziprasidone hydrochloride 1.5 hydrate.
Abstract:
PURPOSE: A method for isolating and preparing S-(-)-amlodipine is provided to simply and economically isolate and prepare S-(-)-amlodipine having high optical purity. CONSTITUTION: A method for preparing S-(-)-amlodipine compound of chemical formula 1 comprises: a step of reacting racemic amlodipine with L-tartaric acid in tetrahydrofuran solvent; a step of isolating the reactant to precipitate and reaction solution; a step of reacting the isolated reaction solution with D-tartaric acid; a step of reacting (S)-(-)-amlodipine-hemi-D-tartrate-2THF with reaction solution; and a step of reacting the precipitate and base. The solvent containing tetrahydrofuran is tetrahydrofuran single solvent.