1-Cyclopropyl-6,8-difluoro-7-(3-methyl-3-trifluoroacetamido-1-azetidinyl)-4-oxo-3-quinolinecarboxylic acid → E 4441

Participants

Reaction Steps

A solution of 0.8 g (1.8 mmoles) of 1-cyclopropyl-6,8-difluoro-1,4-dihydro-7-(3-methyl-3-trifluoroacetamido-1-azetidinyl)-4-oxo-3-quinolinecarboxylic acid (example 11) in a mixture of 10 ml of 1N sodium hydroxide and 2 ml of ethanol is refluxed for 3 hours. It is evaporated under vacuum and acetic acid is added. The product is filtered and washed with water and ethanol. 0.35 g (55%) of 1-cyclopropyl-6,8-difluoro-1,4-dihydro-7-(3-methyl-3-amino-1-azetidinyl)-4-oxo-3-quinolinecarboxylic acid are obtained having a melting point of 298°-300° C.

Provenance & Evidence