反应详情

A mixture of 0.65 g (1.5 mmoles) of 1-ethyl-6,8-difluoro-1,4-dihydro-4-oxo-7-(3-methyl-3-trifluoroacetamido-1-azetidinyl)-quinoline-3-carboxylic acid (example 21) 2 ml of 10% sodium hydroxide and 3 ml of ethanol is refluxed in 10 ml of water for 3 hours. It is filtered while hot, cooled, acidified with acetic acid, and filtered. After washing with water, 0.48 g (95%) of 1-ethyl-6,8-difluoro-7-(3-amino-3-methyl-1-azetidinyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid are obtained, melting at 293°-6° C.

1. filtrationIt is filtered while hot,
2. temperaturecooled
3. filtrationfiltered
4. washAfter washing with water, 0.48 g (95%) of 1-ethyl-6,8-difluoro-7-(3-amino-3-methyl-1-azetidinyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid
5. customare obtained