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■ Synthetic Studies on Carbapenem Antibiotics: A Carbon-introduced Reaction at the C-4 Position of a β-Lactam by Carbane Insertion Reaction

Tetsuji Kametani, Naoaki Kanaya, Tomoko Mochizuki, and Toshio Honda

*Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan

Abstract

The reaction of 4-thia-azetidinones with diazomalonates in the presence of a catalytic amount of rhodium (II) acetate afforded the carbon-introduced products at the C₄-position of β-lactams.