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Synthesis 1991; 1991(12): 1163-1167
DOI: 10.1055/s-1991-28411
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Reaction of Lithium Trimethylsilyldiazomethanide with Ketenimines Bearing Electron-Withdrawing Groups

Toyohiko Aoyama* , Takao Nakano, Kiyotaka Marumo, Yuka Uno, Takayuki Shioiri
  • *Faculty of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467, Japan
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Publication Date:
29 April 2002 (online)

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Ketenimines bearing electron-withdrawing groups (X in 1) at the C2-position react with lithium trimethylsilyldiazomethanide [diazo(lithio) trimethylsilylmethane] to give 4-amino-3-trimethylsilylpyrazoles 4 or 5 mainly; in some cases 4-trimethylsilyl-1,2,3-triazole derivatives 3 were formed as the major products.