Abstract:
본 발명은 [1,2,3]-옥사티아졸리딘-2,2-디옥사이드 또는 [1,2,5]-티아디아졸리딘-1,1-디옥사이드 유도체의 신규한 제조방법을 제공하며, 본 발명의 제조방법에 따라 5H-[1,2,3]-옥사티아졸-2,2-디옥사이드 또는 [1,2,5]-티아디아졸린-1,1-디옥사이드를 로듐 화합물 촉매 및 수소공여체의 존재 하에 비대칭 환원반응시킴으로써 거울상 이성질체적으로 순수한 [1,2,3]-옥사티아졸리딘-2,2-디옥사이드 또는 [1,2,5]-티아디아졸리딘-1,1-디옥사이드 유도체를 간편하고, 효율적으로 제조할 수 있다.
Abstract:
PURPOSE: A method for preparing optically active 2-sulfonyl-1-heteraryl ethanol derivative is provided to obtain pure heteroaryl-amino alcohol and duloxetine. CONSTITUTION: A 2-sulfonyl oxy-1-heteroaryl ethanol derivative having optical activity is prepared by asymmetric reduction of alpha-sulfonyl oxy heteroaryl ketone compound of chemical formula 4 under the presence of a hydrogen donor and rhodium compound catalyst containing pentamethyl cyclo pentadienyl group of chemical formula 5. The hydrogen donor is formic acid or metal salt or ammonium salt thereof.
Abstract:
PURPOSE: A method for preparing [1,2,3]-oxathiazolidine-2,2-dioxide or derivative thereof is provided to simply and efficiently obtain the enantiomerically pure compounds. CONSTITUTION: A method for preparing a compound of chemical formula 1a or 1b with optical activity comprises a step of performing asymmetric reduction of a compound of chemical formula 2 under the presence of a hydrogen donor and a rhodium compound catalyst containing pentamethylcyclopentadienyl group. The hydrogen donor is formic acid, metal salt thereof of. The compound of chemical formula 2 is prepared by reacting alpha-hydroxy ketone of chemical formula 4 with sulfamide of chemical formula 5 by thermal reflux or under an acidic condition.
Abstract:
PURPOSE: A method for preparing optically active 2-sulfonyl oxy-1-heteroaryl ethanol derivative is provided to prepare pure bufuralol of optical isomer. CONSTITUTION: A 2-sulfony oxy-1-heteroaryl ethanol derivative is prepared by asymmetric reduction of alpha-sulfonyl oxy hetero aryl ketone compound of chemical formula 3 under the presence of hydrogen donor and rhodium compound catalyst containing pentamethyl cyclopentadienyl group of chemical formula 4. The hydrogen donor is formic acid or metal salt or ammonium salt thereof. The hydrogen donor is used without a solvent or is dissolved in a solvent. The solvent is ethyl acetate, toluene, methylene chloride, dimethylform amide(DMF), tetrahydrofurane(THF), acetonitrile or isopropanol. A pure bufuralol is prepared by reacting the optically active 2-sulfonyl oxy-1-heteroaryl ethanol derivative compound of chemical formula 1c or 1d with t-butyl amine.
Abstract:
본 발명은 [1,2,3]-옥사티아졸리딘-2,2-디옥사이드 또는 [1,2,5]-티아디아졸리딘-1,1-디옥사이드 유도체의 신규한 제조방법에 관한 것으로, 본 발명의 제조방법은 5 H -[1,2,3]-옥사티아졸-2,2-디옥사이드 또는 [1,2,5]-티아디아졸린-1,1-디옥사이드를 로듐 화합물 촉매 및 수소공여체의 존재 하에 비대칭 환원반응시킴으로써 거울상 이성질체적으로 순수한 [1,2,3]-옥사티아졸리딘-2,2-디옥사이드 또는 [1,2,5]-티아디아졸리딘-1,1-디옥사이드 유도체를 간편하고, 효율적으로 제조할 수 있다.
Abstract:
PURPOSE: A method for preparing optically active 2-sulfonyl oxy-1-heteroaryl ethanol derivative is provided to prepare pure bufuralol of optical isomer. CONSTITUTION: A 2-sulfony oxy-1-heteroaryl ethanol derivative is prepared by asymmetric reduction of alpha-sulfonyl oxy hetero aryl ketone compound of chemical formula 3 under the presence of hydrogen donor and rhodium compound catalyst containing pentamethyl cyclopentadienyl group of chemical formula 4. The hydrogen donor is formic acid or metal salt or ammonium salt thereof. The hydrogen donor is used without a solvent or is dissolved in a solvent. The solvent is ethyl acetate, toluene, methylene chloride, dimethylform amide(DMF), tetrahydrofurane(THF), acetonitrile or isopropanol. A pure bufuralol is prepared by reacting the optically active 2-sulfonyl oxy-1-heteroaryl ethanol derivative compound of chemical formula 1c or 1d with t-butyl amine.