Citation: Han Song CHEN, Zheng Ming LI, Zhong Wen WANG. A Convenient Synthesis of Pyrazolylpyrazoles Using α-Oxo Ketene S,S-and N,S-Acetals[J]. Chinese Chemical Letters, ;1999, 10(8): 643-646. shu

A Convenient Synthesis of Pyrazolylpyrazoles Using α-Oxo Ketene S,S-and N,S-Acetals

State Key Laboratory of Elemento-Organic Chemistry, Institute of Elemento-Organic Chemistry Nankai University, Tianjin 300071

Received Date: 8 February 1999

Substituted pyrazolylpyrazoles were synthesized through the reaction of hydrazine hydrate and α-oxo-(3,5-dimethyl-lH-pyrazole-1一yl) ketene S,S-and N.S-acetals, which were obtained from α-oxo-(3,5-dimethyl-lH-pyrazole-l-yl) acetophenone. Pyrazolylpyrazole was also prepared via α-oxo ketene N,O-acetal by way of ring chain transformation.
- Pyrazole,
- pyrazolylpyrazole,
- α-oxo-ketene dithioacetal,
- ring chain transformation
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