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    • 21. 发明申请
    • Process for Producing alpha Substituted Ester
    • 生产α取代酯的方法
    • US20110213176A1
    • 2011-09-01
    • US13127955
    • 2009-10-22
    • Akihiro IshiiManabu Yasumoto
    • Akihiro IshiiManabu Yasumoto
    • C07C67/343
    • C07B53/00C07B55/00C07B2200/07C07C67/343C07C303/24C07C69/612C07C305/26
    • There is provided a process for producing an α-substituted ester by reaction of a fluorosulfuric acid ester of α-hydroxyester with a Grignard reagent in the presence of a zinc catalyst. It is newly found that the reaction for production of α-substituted esters, in which the raw reaction substrate is limited to expensive trifluoromethanesulfonic acid esters, can proceed favorably with the use of fluorosulfuric acid esters suitable for mass-production uses. By the use of the fluorosulfuric acid ester high in optical purity, it is possible to obtain the α-substituted ester with high optical purity upon inversion of the asymmetric carbon configuration. The process of the present invention can solve all of the prior art problems and can be applied for industrial uses.
    • 提供了在锌催化剂存在下,通过α-羟基酯的氟代硫酸酯与格氏试剂的反应制备α-取代的酯的方法。 新发现,通过使用适合于批量生产用途的氟代硫酸酯,可以有利地进行生产反应底物被限制为昂贵的三氟甲磺酸酯的α-取代酯的反应。 通过使用光学纯度高的氟代硫酸酯,可以通过不对称碳结构的反转获得具有高光学纯度的α-取代的酯。 本发明的方法可以解决所有现有技术的问题,并且可以应用于工业用途。
    • 29. 发明授权
    • Optically active (R)-1-(4-trifluoromethylphenyl)ethylamine
    • 光学活性(R)-1-(4-三氟甲基苯基)乙胺
    • US07081551B2
    • 2006-07-25
    • US10442652
    • 2003-05-21
    • Akihiro IshiiManabu YasumotoYokusu KuriyamaMasatomi KanaiKanjin Inomiya
    • Akihiro IshiiManabu YasumotoYokusu KuriyamaMasatomi KanaiKanjin Inomiya
    • C07C209/28C07C251/24C07C211/03
    • C07C251/24C07C211/29
    • Optically active (R)-1-(4-trifluoromethylphenyl)ethylamine is a novel compound as an important intermediate for medicines and agricultural chemicals. This compound can be obtained with high optical purity and high yield by a process including the steps of (a) a dehydrocondensation of 4′-(trifluoromethyl)acetophenone and an optically active (R)-1-phenylethylamine to obtain an optically active imine; (b) asymmetrically reducing the imine into an optically active secondary amine; (c) reacting the amine with an organic acid (phthalic acid or benzenesulfonic acid), thereby obtaining a product that is a phthalate of or benzenesulfonate of the amine; (d) subjecting the product of the step (c) to a hydrogenolysis, thereby obtaining a product that is a phthalate of or benzenesuilfonate of optically active (R)-1-(4-trifluoromethylphenyl)ethylamine; and (e) neutralizing the product of the step (d) into the optically active (R)-1-(4-trifluoromethylphenyl)ethylamine.
    • 光学活性(R)-1-(4-三氟甲基苯基)乙胺是一种新型化合物,作为药物和农药的重要中间体。 通过包括以下步骤的(a)4' - (三氟甲基)苯乙酮和光学活性(R)-1-苯基乙胺的脱氢缩合得到光学活性亚胺,可以获得具有高光学纯度和高收率的该化合物。 (b)将亚胺不对称地还原成光学活性仲胺; (c)使胺与有机酸(邻苯二甲酸或苯磺酸)反应,从而获得胺的邻苯二甲酸酯或苯磺酸盐的产物; (d)使步骤(c)的产物进行氢解,得到光学活性(R)-1-(4-三氟甲基苯基)乙胺的邻苯二甲酸酯或苯磺酸酯的产物; 和(e)将步骤(d)的产物中和到光学活性(R)-1-(4-三氟甲基苯基)乙胺中。