发明授权
- 专利标题: Preparation of 4-methyl-2-pyrazolin-5-ones
- 专利标题(中): 4-甲基-2-吡唑啉-5-酮的制备
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申请号: US582225申请日: 1975-05-30
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公开(公告)号: US4000156A公开(公告)日: 1976-12-28
- 发明人: Marcel Jacob Monbaliu , Walter Puschel , Raphael Karel Van Poucke
- 申请人: Marcel Jacob Monbaliu , Walter Puschel , Raphael Karel Van Poucke
- 申请人地址: BE Mortsel
- 专利权人: AGFA-GEVAERT N.V.
- 当前专利权人: AGFA-GEVAERT N.V.
- 当前专利权人地址: BE Mortsel
- 优先权: DT2428431 19740612
- 主分类号: C07D231/52
- IPC分类号: C07D231/52 ; G03C7/384 ; C07D231/08
摘要:
A method is described for the preparation of a 1-substituted 4-methyl-2-pyrazolin-5-one by catalytic hydrogenation under pressure and simultaneous methylation by means of paraformaldehyde of the appropriate 1-substituted 2-pyrazolin-5-one in a medium of an inert organic solvent comprising ammonium acetate.
公开/授权文献
- US4630204A High resolution ECG waveform processor 公开/授权日:1986-12-16
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