Method for producing lipoic acid and dihydrolipoic acid
    1.
    发明授权
    Method for producing lipoic acid and dihydrolipoic acid 失效
    硫辛酸和二氢硫辛酸的制备方法

    公开(公告)号:US06906210B2

    公开(公告)日:2005-06-14

    申请号:US10343034

    申请日:2001-07-24

    摘要: Processes for the preparation of R-lipoic acid or S-lipoic acid comprising a process step selected from a) distillation of dihydrolipoic acid, b) reaction of  or its stereoisomer, where Ms is SO2—R′ and R and R′ independently of one another is [sic] C1-C6-alkyl, C3-C8-cycloalkyl, C3-C8-cycloalkylalkyl, aryl or aralkyl, with sodium sulfide and sulfur in ethanol and reaction with a complex hydride, (c) the extraction of a protic solution of R-dihydrolipoic acid or S-dihydrolipoic acid with organic solvents at a pH from 9 to 10, or (d) the extraction of R-dihydrolipoic acid or S-dihydrolipoic acid with organic solvents from a protic solution at a pH of 4 to 5, or a combination of one or more of steps (a) to (d), and processes for the preparation of dihydrolipoic acid and the compound 1,6,8 [lacuna] octanetriol.

    摘要翻译: 用于制备R-硫辛酸或S-硫辛酸的方法包括选自以下的方法步骤:a)蒸馏二氢硫辛酸,b)其反应或其立体异构体,其中Ms为SO 2 -R' 且R和R'彼此独立地是C 1 -C 6 - C 6 - 烷基,C 3 -C 8 环烷基,C 3 -C 8 - 环烷基烷基,芳基或芳烷基,与硫化钠和硫在乙醇中并与络合氢化物反应,(c) 在9至10的pH下用有机溶剂萃取R-二氢硫辛酸或S-二氢硫辛酸的质子溶液,或(d)用有机溶剂从质子溶液中萃取R-二氢硫辛酸或S-二氢硫辛酸 pH为4至5,或步骤(a)至(d)中的一种或多种的组合,以及制备二氢硫辛酸和化合物1,6,8 [空白]辛三醇的方法。

    Process for the preparation of lipoic acid and dihydrolipoic acid
    2.
    发明授权
    Process for the preparation of lipoic acid and dihydrolipoic acid 失效
    制备硫辛酸和二氢硫辛酸的方法

    公开(公告)号:US07109362B2

    公开(公告)日:2006-09-19

    申请号:US10432455

    申请日:2001-11-29

    CPC分类号: C07D339/04

    摘要: The present invention relates to a process for the preparation of R- and S-lipoic acid and R- and S-dihydrolipoic acid comprising(a) reaction of where MS is SO2—R′ and R and R′ independently of one another are C1–C6-alkyl, C3–C8-cycloalkyl, C3–C8-cycloalkylalkyl, aryl or aralkyl, with sodium sulfide and sulfur in methanol. The invention especially relates to processes for preparing pure R- or S-dihydrolipoic acid, which is either used directly or processed further to give R- and S-lipoic acid. The process also serves for the production of pharmaceuticals. The present invention further relates to a solution of sodium sulfide trihydrate and sulfur in methanol, the sulfur being present in a molar excess over the sodium sulfide trihydrate, and a kit which comprises the solution according to the invention.

    摘要翻译: 本发明涉及制备R-和S-硫辛酸和R-和S-二氢硫辛酸的方法,其包括(a)其中MS为SO 2 -R'和R和 R'彼此独立地是C 1 -C 6 - 烷基,C 3 -C 8 - 环烷基 C 3 -C 8 - 环烷基烷基,芳基或芳烷基,与硫化钠和硫在甲醇中反应。 本发明特别涉及制备纯R-或S-二氢硫辛酸的方法,其可直接使用或进一步加工得到R-和S-硫辛酸。 该方法还用于生产药物。 本发明还涉及硫化钠三水合物和硫在甲醇中的溶液,所述硫以超过硫化钠三水合物的摩尔量存在,以及包含根据本发明的溶液的试剂盒。

    Process for the preparation of lipoic acid and dihydrolipoic acid
    6.
    发明申请
    Process for the preparation of lipoic acid and dihydrolipoic acid 失效
    制备硫辛酸和二氢硫辛酸的方法

    公开(公告)号:US20050101669A1

    公开(公告)日:2005-05-12

    申请号:US10432455

    申请日:2001-11-29

    IPC分类号: C07D339/04 A61K31/20

    CPC分类号: C07D339/04

    摘要: The present invention relates to a process for the preparation of R— and S-lipoic acid and R— and S-dihydrolipoic acid comprising (a) reaction of where MS is SO2—R′ and R and R′ independently of one another are C1-C6-alkyl, C3-C8-cycloalkyl, C3-C8-cycloalkylalkyl, aryl or aralkyl, with sodium sulfide and sulfur in methanol. The invention especially relates to processes for preparing pure R— or S-dihydrolipoic acid, which is either used directly or processed further to give R— and S-lipoic acid. The process also serves for the production of pharmaceuticals. The present invention further relates to a solution of sodium sulfide trihydrate and sulfur in methanol, the sulfur being present in a molar excess over the sodium sulfide trihydrate, and a kit which comprises the solution according to the invention.

    摘要翻译: 本发明涉及制备R-和S-硫辛酸和R-和S-二氢硫辛酸的方法,其包括(a)其中MS为SO 2 -R'和R和 R'彼此独立地是C 1 -C 6 - 烷基,C 3 -C 8 - 环烷基 C 3 -C 8 - 环烷基烷基,芳基或芳烷基,与硫化钠和硫在甲醇中反应。 本发明特别涉及制备纯R-或S-二氢硫辛酸的方法,其可直接使用或进一步加工得到R-和S-硫辛酸。 该方法还用于生产药物。 本发明还涉及硫化钠三水合物和硫在甲醇中的溶液,所述硫以超过硫化钠三水合物的摩尔量存在,以及包含根据本发明的溶液的试剂盒。