发明授权
US4434107A Process for preparing an optically active p-hydroxyphenylglycine or a
salt thereof
失效
制备光学活性对羟基苯基甘氨酸或其盐的方法
- 专利标题: Process for preparing an optically active p-hydroxyphenylglycine or a salt thereof
- 专利标题(中): 制备光学活性对羟基苯基甘氨酸或其盐的方法
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申请号: US392535申请日: 1982-06-28
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公开(公告)号: US4434107A公开(公告)日: 1984-02-28
- 发明人: Ichiro Chibata , Shigeki Yamada , Chikara Hongo , Ryuzo Yoshioka
- 申请人: Ichiro Chibata , Shigeki Yamada , Chikara Hongo , Ryuzo Yoshioka
- 申请人地址: JPX Osaka
- 专利权人: Tanabe Seiyaku Co., Ltd.
- 当前专利权人: Tanabe Seiyaku Co., Ltd.
- 当前专利权人地址: JPX Osaka
- 优先权: JPX56-108008 19810709
- 主分类号: C07B55/00
- IPC分类号: C07B55/00 ; C07B31/00 ; C07B57/00 ; C07C67/00 ; C07C227/34 ; C07C229/36 ; C07C143/30 ; C07C101/72
摘要:
The present invention relates to the optical resolution of a p-hydroxyphenylglycine salt with simultaneous racemization of the undesired enantiomer thereof. The invention is carried out by preferential crystallizing out the desired enantiomer from a supersaturated solution of the racemic modification thereof in a lower aliphatic acid in the presence of an aliphatic or aromatic aldehyde.
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