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Communication | Regular issue | Vol 27, No. 2, 1988, pp.343-346
Published online, 1st January, 1970
DOI: 10.3987/COM-87-4403
New Method and Reagents in Organic Synthesis. 74. Lithium Trimethylsilydiazomethane. A Useful Reagent for the Preparation of Pyrazoles from α,β-Unsaturated Sulfones

Tetsuo Asaki, Toyohiko Aoyama, and Takayuki Shioiri*

*Faculty of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan


Lithium trimathylsilyldiazomethane smoothly reacts with various α,β-unsaturated sulfones to give 3 (or 5)-trimethylsilylpyrazoles in excellent yields.