发明名称 |
PREPARATION OF CODEINE FROM MORPHINE |
摘要 |
An improved process for the preparation of codeine from morphine comprises the steps of: a) reacting morphine with a methylating agent in the presence of a hydrocarbon solvent at a temperature of 100 to 215 DEG C under reflux conditions such that approximately 50 % or more of the hydrocarbon solvent is returned to the reaction mixture to substantially avoid the formation of codeine methyl ether; and b) recovering codeine from the reaction mixture. The process may include step a) above followed by b) cooling the reaction mixture to approximately 85 DEG C and adding water to terminate the reaction; c) raising the pH of the reaction mixture to approximately 11; d) separating the hydrocarbon solvent phase containing codeine and dimethylaniline; and e) adding a dilute mineral or organic acid and approximately 6 to 7 times the volume of water for each volume of hydrocarbon solvent to separate dimethylaniline and codeine. |
申请公布号 |
WO2004037826(A3) |
申请公布日期 |
2004.07.01 |
申请号 |
WO2003US32698 |
申请日期 |
2003.10.14 |
申请人 |
MALLINCKRODT INC.;HILL, LLOYD, P. |
发明人 |
HILL, LLOYD, P. |
分类号 |
C07D489/02 |
主分类号 |
C07D489/02 |
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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