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    • 10. 发明申请
    • PROCESS FOR THE SYNTHESIS OF CHIRALLY PURE beta -AMINO-ALCOHOLS
    • 合成纯度β-氨基醇的方法
    • WO03050063A2
    • 2003-06-19
    • PCT/US0238119
    • 2002-11-26
    • WYETH CORP
    • KREFT ANTHONY FRANKANTANE MADELENE MIYOKOCOLE DEREK CECILKUBRAK DENNIS MARTINRESNICK LYNNSTOCK JOSEPH RAYMONDWANG ZHENG
    • A61K31/381C07B53/00C07B61/00C07C209/00C07C213/00C07C215/08C07C227/04C07C229/08C07C247/12C07D227/12C07D263/26C07D333/32C07D333/34C07C
    • C07C215/20C07B2200/07C07C215/08C07C215/24C07C215/28C07C215/56C07C229/08C07C229/28C07C229/30C07C229/36C07C247/12C07C323/63C07D263/26C07D333/34
    • A process is provided for preparing chirally pure S-enantiomers of alpha -amino acids comprising the steps of: a) preparing an organometallic reagent from an alkyl halide of the Formula (R)2CH(CH2)nCH2X; b) adding the organometallic reagent to carbon dioxide to afford a carboxylic acid; c) activating the carboxylic acid with an acid chloride, phosphorus trichloride, acid anhydride, or thionyl chloride in the presence of a tertiary amine base; d) reacting the product of step c) with an alkali metal salt of S-4-benzyl-2-oxazolidinone; e) treating the product of step d) with a strong non-nucleophilic base to form an enolate anion; f) trapping the enolate anion with 2,4,6-triisopropylbenzenesulfonyl azide to afford an oxazolidinone azide; g) hydrolyzing the oxazolidinone azide with an aqueous base to afford an alpha -azido acid; h) reducing the alpha -azido acid to the alpha -amino acid; and i) recrystallizing the alpha -amino acid to the chirally pure alpha -amino acid. A process is also provided for preparing chirally pure S-enantiomers of beta -amino alcohols further comprising the steps of reducing the crude alpha -amino acid to the beta -amino alcohol and recrystallizing the beta -amino alcohol to the chirally pure beta -amino alcohol. A process is further provided for preparing chirally pure S enantiomers of N-sulfonyl beta -amino alcohols further comprising the steps of sulfonylating the beta -amino alcohol with 5-chloro-thiophene-2-sulfonyl halide; and recrystallizing to afford the chirally pure N-sulfonyl beta -amino alcohols.
    • 提供了制备α-氨基酸的手性纯的S-对映异构体的方法,包括以下步骤:a)由式(R)2CH(CH 2)n CH 2 X的烷基卤制备有机金属试剂; b)将有机金属试剂加入到二氧化碳中,得到羧酸; c)在叔胺碱存在下用酰氯,三氯化磷,酸酐或亚硫酰氯活化羧酸; d)使步骤c)的产物与S-4-苄基-2-恶唑烷酮的碱金属盐反应; e)用强非亲核碱处理步骤d)的产物以形成烯醇化物阴离子; f)用2,4,6-三异丙基苯磺酰叠氮化物捕获烯醇化阴离子,得到恶唑烷酮叠氮化物; g)用碱水溶液水解恶唑烷酮叠氮化物,得​​到α-叠氮酸; h)将α-叠氮酸还原成α-氨基酸; 和i)将α-氨基酸重结晶到手性纯的α-氨基酸。 还提供了制备β-氨基醇的手性纯的S-对映异构体的方法,该方法还包括将α-氨基酸粗制还原成β-氨基醇并将β-氨基醇重结晶至手性纯的β-氨基醇 。 还提供了制备N-磺酰基β-氨基醇的手性纯S对映异构体的方法,其还包括用5-氯 - 噻吩-2-磺酰卤磺酰化β-氨基醇的步骤; 并重结晶得到手性纯的N-磺酰基β-氨基醇。