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A process for the preparation of a in 3 - position with an n - monosubstituted amino radical and in 4 - position substituted 5 - pyrazolone
A process for the preparation of a in 3 - position with an n - monosubstituted amino radical and in 4 - position substituted 5 - pyrazolone
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机译:一种具有n-单取代氨基和4-位取代的5-吡唑啉酮的3-位制备方法
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摘要
PURPOSE:The high purity title compound, useful as two equivalent coupler (DIR coupler), is economically prepared from readily available 3-N-monosubstituted-amino-5-pyrazolone as a starting material.
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