Abstract:
본 발명은 하기 화학식 1의 화합물, 하기 화학식 3의 화합물, 하기 [212] 화합물, [224] 화합물, 또는 [228] 화합물; 이의 약제학적으로 허용 가능한 염; 이의 입체 이성질체; 이의 수화물; 또는 이의 용매화물, 및 이를 포함하는 약제학적 조성물을 제공한다. 상기 약제학적 조성물은 우수한 항바이러스 효능을 가지므로 SARS-CoV-2와 같은 바이러스 감염 질환의 예방 또는 치료 효과를 가지며, IL-5 발현 억제 효과를 보이므로 호흡기 질환 또는 알레르기성 질환의 예방 또는 치료 효과를 가진다.
Abstract:
PURPOSE: An improved method for preparing candesartan cilexetil is provided to simplify entire process under a mild condition. CONSTITUTION: A method for preparing candesartan cilexetil of chemical formula 1 comprises: a step of dissolving a compound of chemical formula 2 in a dichloromethane solution; a step of adding a mixture solution of alcohol and acetyl chloride to the dichloromethane solution; a step of deprotecting to remove triphenyl methane protection groups and obtain a compound of chemical formula 1; a step of adding ethyl acetate and n-hexane and precipitating the compound of chemical formula 1.
Abstract:
PURPOSE: A method for preparing telmisartan is provided to easily remove inorganic salt using a reaction solvent and to simplify reaction process without a separate process. CONSTITUTION: A method for preparing telmisartan of chemical formula 1 comprises: a step of condensing a compound of chemical formula 2 and a compound of chemical formula 3 using dimethyl sulfoxide and isopropanol to prepare a compound of chemical formula 4; and a step of hydrolyzing the compound of chemical formula 4 in a mixture solvent of methanol and purified water.
Abstract:
PURPOSE: A process for preparing 2-cyano-3-hydroxy-N-[(4-trifluoromethyl)phenyl]but-2-enamide is provided to easily remove by-products generated during the manufacturing process of final products. CONSTITUTION: A process for preparing 2-cyano-3-hydroxy-N-[(4-trifluoromethyl)phenyl]but-2-enamide of chemical formula 1 from a compound of chemical formula 5 comprises the steps of: activating a compound of chemical formula 2 to an esterified compound using a carbodiimide compound; and reacting the resultant with a compound of chemical formula 4 to prepare a compound of chemical formula 5. The carbodiimide compound is selected from 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride, 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide, 1,3-diisopropylcarbodiimide or 1,3-dicyclohexylcarbodiimide.
Abstract:
A process for preparing an intermediate of donepezil having dementia-treating effects is provided to improve preparation yield and convenience of mass production of the intermediate by replacing the base which is difficult to be used industrially. An intermediate of donepezil, 2-[(E)-1-(1-benzyl-4-piperidyl)methylidene]-5,6-dimethoxy-1-indanone represented by the formula(1) is prepared by reacting 1-indanone compound represented by the formula(2) with aldehyde compound represented by the formula(3) by using a base selected from sodium methoxide(MeONa), sodium ethoxide(EtONa), potassium t-butoxide, sodium hydride, sodium hydroxide, potassium hydroxide and sodium amide in a reaction solvent selected from methanol, ethanol, isopropanol, t-butanol, tetrahydrofuran, 1,4-dioxane, diisopropyl ether, dimethylform amide, dimethylsulfoxide and nitromethane.
Abstract:
본 발명은 칸데사르탄실렉세틸의 개선된 제조방법에 관한 것으로서, 트리틸칸데사르탄실렉세틸 화합물인 (± )-1-(사이클로헥실옥시카르보닐옥시)에틸-2-에톡시-1-[[2′-(N-트리페닐메틸-1H-테트라졸-5-일)바이페닐-4-일]메틸-1H-벤즈이미다졸-7-카르복실레이트의 트리페닐메탄 보호기를 제거하는 방법으로 알코올에 아세틸클로라이드를 첨가한 용액을 사용하여 트리페닐메탄 보호기를 제거함으로써 칸데사르탄실렉세틸을 제조하는 것이다. 본 발명에 따른 칸데사르탄실렉세틸의 제조방법은 유기용매에서 긴 시간 동안 환류교반이 필요치 않고, 염화수소 가스를 사용하지 않아 위험하지 않고, 전체적인 반응공정이 온화한 조건에서 단순화되어 대량생산에 적합하다. 특히 제조수율도 크게 향상되면서 아주 높은 순도의 칸데사르탄실렉세틸을 제조하는 방법을 제공한다.