Synlett

Selective N-Methylation of Pyrazolone with Methanol by Use of ZrO2 Catalyst in the Liquid Phase

S Shinoda, S Shima, T Yamakawa

文献索引：Shinoda, Sumio; Shima, Satoru; Yamakawa, Tetsu Synlett, 2000 , # 6 p. 809 - 810

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被引用次数: 1

摘要

Abstract: Selective methylation of pyrazolone to 1-methylpyrazolone was investigated with ZrO2, which is a representative metal oxide with amphoteric character. The high selectivity up to~ 77% was obtained at 503 K. Mechanism is proposed in view of weak acidic- moderately basic pair sites of ZrO2. Key words: pyrazolone, selective methylation, methanol, metal oxide catalyst