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    • 1. 发明授权
    • Process for selective synthesis of enantiomers of substituted 1-(2-amino-1-phenyl-ethyl)-cyclohexanols
    • 选择性合成取代的1-(2-氨基-1-苯基 - 乙基) - 环己醇的对映异构体的方法
    • US07612210B2
    • 2009-11-03
    • US11633207
    • 2006-12-04
    • Paige Erin MahaneyMadelene Miyoko AntaneJerry Shunneng Sun
    • Paige Erin MahaneyMadelene Miyoko AntaneJerry Shunneng Sun
    • C07D263/04
    • C07C213/02C07B2200/07C07C59/72C07C235/34C07C2601/14C07D263/26C07D295/092C07D295/096C07D295/185C07C217/74
    • A process for the enantioselective synthesis of an (S)- or (R)-1-[2-dimethylamino)-1-(methoxyphenyl)ethyl]cyclohexanol and analogues or salt thereof are described. The method involves the steps of (a) reacting an (S) or (R) 4-benzyloxazolidinone with a mixed anhydride of a methyoxyphenylacetic acid under conditions which form a oxazolidinone, (4S)- or (4R)-4-benzyl-3-[methyoxyphenyl]acetyl]-oxazolidin-2-one, (b) treating the (4S)- or (4R)-4-benzyl-3-[(methoxyphenyl)acetyl]-1,3-oxazolidin-2-one with an aprotic amine base and titanium chloride in a chlorinated solvent under conditions which permit formation of the corresponding anion, (c) mixing the corresponding anion with titanium chloride and cylcohexanone under conditions which permit an aldol reaction to form the corresponding (4S)- or (4R)-4-benzyl-3-[(2R)-2-(1-hydroxycyclohexyl)-2-(methoxyphenyl)acetyl]-1,3-oxazolidin-2-one,(d) hydrolyzing the (4S)— or (4R)-4-benzyl-3-[(2R)-2-(1-hydroxycyclohexyl)-2-(methoxyphenyl)acetyl]-1,3-oxazolidin-2-one to form a chiral acid (2S or 2R)-(1-hydroxycyclohexyl)-methoxyphenyl)acetic acid, (e) coupling the chiral phenylacid to a secondary amine to form an amide, and (f) reducing the amide to form an (S) or (R) 1[2-dimethylamino)-1-(methoxyphenyl)ethyl]cyclohexanol or a salt thereof.
    • 描述了(S) - 或(R)-1- [2-二甲基氨基)-1-(甲氧基苯基)乙基]环己醇及其类似物或其盐的对映选择性合成方法。 该方法包括以下步骤:(S)或(R)4-苄氧基恶唑烷酮与甲氧基苯乙酸的混合酸酐在形成恶唑烷酮,(4S) - 或(4R)-4-苄基-3 - [甲氧基苯基]乙酰基] - 恶唑烷-2-酮,(b)用(4S) - 或(4R)-4-苄基-3 - [(甲氧基苯基)乙酰] -1,3-恶唑烷-2-酮处理 非质子胺基和氯化钛在氯化溶剂中,在允许形成相应阴离子的条件下,(c)在允许醛醇缩合反应形成相应的(4S) - 或( - )的条件下将相应的阴离子与氯化钛和环己酮混合, 4R)-4-苄基-3 - [(2R)-2-(1-羟基环己基)-2-(甲氧基苯基)乙酰基] -1,3-恶唑烷-2-酮,(d)水解(4S) - 或 (4R)-4-苄基-3 - [(2R)-2-(1-羟基环己基)-2-(甲氧基苯基)乙酰基] -1,3-恶唑烷-2-酮以形成手性酸(2S或2R) - (1-羟基环己基) - 甲氧基苯基)乙酸,(e)将手性苯基酸偶联到仲胺以形成一个 (f)还原酰胺以形成(S)或(R)1 [2-二甲基氨基)-1-(甲氧基苯基)乙基]环己醇或其盐。
    • 2. 发明授权
    • Process for the synthesis of chirally pure beta-amino-alcohols
    • 手性纯合β-氨基醇的合成方法
    • US06800764B2
    • 2004-10-05
    • US10304322
    • 2002-11-26
    • Anthony Frank KreftMadelene Miyoko AntaneDerek Cecil ColeDennis Martin KubrakLynn ResnickJoseph Raymond StockZheng Wang
    • Anthony Frank KreftMadelene Miyoko AntaneDerek Cecil ColeDennis Martin KubrakLynn ResnickJoseph Raymond StockZheng Wang
    • C07D33332
    • 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 &agr;-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 &agr;-azido acid; h) reducing the &agr;-azido acid to the &agr;-amino acid; and i) recrystallizing the &agr;-amino acid to the chirally pure &agr;-amino acid. A process is also provided for preparing chirally pure S-enantiomers of &bgr;-amino alcohols further comprising the steps of reducing the crude &agr;-amino acid to the &bgr;-amino alcohol and recrystallizing the &bgr;-amino alcohol to the chirally pure &bgr;-amino alcohol. A process is further provided for preparing chirally pure S enantiomers of N-sulfonyl &bgr;-amino alcohols further comprising the steps of sulfonylating the &bgr;-amino alcohol with 5-chloro-thiophene-2-sulfonyl halide; and recrystallizing to afford the chirally pure N-sulfonyl &bgr;-amino alcohols.
    • 提供了一种用于制备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-叠氮基; h)将α-叠氮基还原成α-氨基酸; 和i)将α-氨基酸重结晶至手性纯的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β-氨基酸的粗α-氨基酸还原成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。