发明公开
EP1018516A4 METHOD FOR CRYSTALLIZING MALEIC ACID SALT OF N-(1(S)-ETHOXYCARBONYL-3-PHENYLPROPYL)-L-ALANYL-L-PROLINE
审中-公开
方法晶性能(1(S) - 乙氧羰基-3-苯丙基)-L-丙氨酰-L-脯氨酸的N-马来酸盐
- 专利标题: METHOD FOR CRYSTALLIZING MALEIC ACID SALT OF N-(1(S)-ETHOXYCARBONYL-3-PHENYLPROPYL)-L-ALANYL-L-PROLINE
- 专利标题(中): 方法晶性能(1(S) - 乙氧羰基-3-苯丙基)-L-丙氨酰-L-脯氨酸的N-马来酸盐
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申请号: EP99929893申请日: 1999-07-19
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公开(公告)号: EP1018516A4公开(公告)日: 2004-05-26
- 发明人: KINOSHITA KOICHI , MOROSHIMA TADASHI , YANAGIDA YOSHIFUMI , FUSE YOSHIHIDE , UEDA YASUYOSHI
- 申请人: KANEKA CORP
- 专利权人: KANEKA CORP
- 当前专利权人: KANEKA CORP
- 优先权: JP20523698 1998-07-21
- 主分类号: A61P9/00
- IPC分类号: A61P9/00 ; C07K1/00 ; C07K5/06 ; C07K5/062 ; C07K5/02
摘要:
A method for crystallizing the maleic acid salt of N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanyl-L-proline (Enalapril) from an aqueous liquid with ease in good yield, which comprises mixing an aqueous liquid containing N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanyl-L-proline, maleic acid and a base and having a pH of 4 or more with an acid in an amount of the acid sufficient to convert the base to a neutral salt, to thereby crystallize N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanyl-L-proline in the form of a maleic acid salt.
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