发明名称 |
METHOD FOR THE PRODUCTION OF L-ASCORBIC ACID BY LACTONISATION OF 2-KETO-L-GULONIC ACID OR S2-KETO-L-GULONATE ESTERS |
摘要 |
The invention relates to a process for the preparation of L-ascorbic acid, in which free 2-keto-L-gulonic acid or C3-C10-alkyl 2-keto-L-gulonate is lactonized under acidic conditions in the presence of a water-miscible solvent and where this solvent in situ forms a solvent in which the ascorbic acid formed is poorly soluble. |
申请公布号 |
US2003100771(A1) |
申请公布日期 |
2003.05.29 |
申请号 |
US20020275565 |
申请日期 |
2002.11.07 |
申请人 |
BOTTCHER ANDREAS;BURST WOLFRAM |
发明人 |
BOTTCHER ANDREAS;BURST WOLFRAM |
分类号 |
A61K31/375;A61P3/02;C07B61/00;C07D307/62;(IPC1-7):C07D307/62 |
主分类号 |
A61K31/375 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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