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    • 6. 发明公开
    • R-폼 또는 S-폼 2-테트라히드로 퓨로익산에스테르의 라세미화 방법
    • R-或S-形式的2-四氢呋喃酸酯的研究方法
    • KR1020020012420A
    • 2002-02-16
    • KR1020000045701
    • 2000-08-07
    • 에스케이 주식회사
    • 임상철엄기남임종호
    • C07D307/12
    • PURPOSE: Provided is a method for racemizing of R- or S- form 2-tetrahydrofuroic acid(THFA) ester economically and effectively, thereby recycling S-form or S-form 2-THFA ester produced from manufacturing of S-form or S-form 2-THFA in optical resolution of THFA. CONSTITUTION: The method of racemization comprises reacting 100 part by weight of R-form or S-form THFA ester and 50-500 part by weight of the formula(2) containing 0.1-10 wt.% of alkoxy metallic salt of the formula(3) based on the R-form or S-form THFA ester, at room temperature to alcohol boiling temperature for 0.5-30 hours to obtain racemic THFA ester of the formula(1). In the formulae, R is 1-12 carbon numbered, linear or branched, saturated or unsaturated alkyl or aryl group; M is selected from the group consisting of Li, Na and K.
    • 目的:提供经济有效地R-或S-形式2-四氢呋喃酸(THFA)酯外消旋化的方法,从而回收由S-型或S-型制得的S-型或S-型2-THFA酯, 形成2-THFA在THFA的光学分辨率。 构成:外消旋化方法包括使100重量份的R型或S型THFA酯与50-500重量份式(2)反应,其中含有0.1-10重量%的式(I)的烷氧基​​金属盐( 3)基于R型或S型THFA酯,在室温至醇沸腾温度下进行0.5-30小时,得到式(1)的外消旋THFA酯。 式中R为1-12碳数,直链或支链,饱和或不饱和的烷基或芳基; M选自Li,Na和K.