发明授权
US07273947B1 Method for reducing 3-dimethylamnio-2-phenylpropion-acid ethyl ester-content in solutions of 2-dimethylamino-1-phenyl-3-cyclohexene-1-carboxylic acid ethyl ester
失效
2-二甲基氨基-1-苯基-3-环己烯-1-羧酸乙酯溶液中3-二甲基亚氨基-2-苯基丙酸乙酯含量的降低方法
- 专利标题： Method for reducing 3-dimethylamnio-2-phenylpropion-acid ethyl ester-content in solutions of 2-dimethylamino-1-phenyl-3-cyclohexene-1-carboxylic acid ethyl ester
- 专利标题（中）： 2-二甲基氨基-1-苯基-3-环己烯-1-羧酸乙酯溶液中3-二甲基亚氨基-2-苯基丙酸乙酯含量的降低方法
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申请号： US09889383申请日： 2000-01-15
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公开(公告)号： US07273947B1公开(公告)日： 2007-09-25
- 发明人: Marco Thyes , Wolfgang Falkenberg , Ulrich Schneider
- 申请人： Marco Thyes , Wolfgang Falkenberg , Ulrich Schneider
- 申请人地址： DE Ludwigshafen
- 专利权人： BASF Aktiengesellschaft
- 当前专利权人： BASF Aktiengesellschaft
- 当前专利权人地址： DE Ludwigshafen
- 代理机构： Novak Druce & Quigg, LLP
- 国际申请： PCT/EP00/00306 WO 20000115
- 国际公布： WO00/43353 WO 20000727
- 主分类号： C07C229/00
- IPC分类号： C07C229/00
摘要：
A process for reducing the content of ethyl 3-dimethylamino-2-phenylpropionate in a solution, contaminated therewith, of ethyl 2-dimethylamino-1-phenyl-3-cyclohexene-1-carboxylate in a water-immiscible solvent, which comprises adding from 0.5 to 2.0 equivalents of a carboxylic acid per mole of ethyl 2-dimethylamino-1-phenyl-3-cyclohexene-1-carboxylate to this solution, and stirring this mixture at a temperature of from 50° C. to 100° C., is described.
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