发明名称 |
Process for the isolation of a solid salt of p-hydroxymandelic acid; some salts of p-hydroxymandelic acid. |
摘要 |
<p>A process for the isolation of a solid salt of p-hydroxymandelic acid, which process comprises reacting phenol with glyoxylic acid in the presence of sodium or potassium hydroxide, acidifying to a pH less than 3, extracting the resulting solution with a water-immiscible solvent to provide a solution of p-hydroxymandelic acid and precipitating the salt therefrom; solid ammonium or substituted ammonium salt of p-hydroxymandelic acid. </p> |
申请公布号 |
EP0024181(A1) |
申请公布日期 |
1981.02.25 |
申请号 |
EP19800302741 |
申请日期 |
1980.08.08 |
申请人 |
BEECHAM GROUP PLC |
发明人 |
DALES, JOHN ROBERT MANSFIELD |
分类号 |
C07C59/50;C07C51/367;C07C51/41;C07C51/48;C07C51/487;C07C59/52;(IPC1-7):07C59/52;07C51/41;07C87/36;07C51/48;07C51/367;07C51/487;07C87/123;07C85/02 |
主分类号 |
C07C59/50 |
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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