4-fluoroazetidinones

Details 4-fluoroazetidinones 4-fluoroazetidinones

C - Chemistry, Metallurgy

07

D

260/306.05, 260/

C07D 205/08 (2006.01) C07D 205/085 (2006.01) C07D 205/095 (2006.01) C07D 403/02 (2006.01) C07D 409/12 (2006.01)

Patent

CA 1173837

ABSTRACT 4-Fluoroazetidinones of formula 1 Image (1) wherein R is a carboxy-substituted or esterified car- boxy-substituted butenyl group represented by the formulas Image Image and R1 is amino, amido, imido or imidazolidino or a pharmaceutically-acceptable salt thereof obtained from penicillin are useful intermediates in the preparation of .beta.-lactam antibiotics. 4-Fluoroazetidinones of formula 1 wherein R1 as described above other than amino, benzyloxycarbonylamino, p-nitrobenzyloxycarbonyl- amino, t-butyloxycarbonylamino, 2,2,2-trichloroethoxy- carbonylamino, or p-methoxybenzyloxycarbonylamino; and R is a carboxy-substituted butenyl represented by the formula Image have antibacterial activity.

397601

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