| 发明名称 |
Process for preparing N-methylated pyrazolones |
| 摘要 |
N-methylated pyrazolones are prepared by methylating pyrazolones with dimethyl sulphate at from -20 to 60 DEG C in the presence of oxides of the alkaline earth metals in acetone.
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| 申请公布号 |
CH629785(A5) |
申请公布日期 |
1982.05.14 |
| 申请号 |
CH19770010606 |
申请日期 |
1977.08.31 |
| 申请人 |
LONZA AG, GAMPEL/WALLIS. GESCHAEFTSLEITUNG BASEL |
发明人 |
DR. GEORGES WOLCZUNOWICZ |
| 分类号 |
C07D231/22;(IPC1-7):C07D231/20 |
主分类号 |
C07D231/22 |
| 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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