1-Cyclopropyl-6,7,8-trifluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid → 1-Cyclopropyl-7-{3-[(ethylamino)methyl]pyrrolidin-1-yl}-6,8-difluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Participants

Reaction Steps

A mixture of 1.00 g (3.53 mmole) of 1-cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, 10 ml of acetonitrile, 0.54 g (3.5 mmole) 1,8-diazobicyclo[5.4.0]undec-7-ene, and 0.48 g (3.7 mmole) of N-ethyl-3-pyrrolidinemethanamine is refluxed one hour, then stirred at room temperature overnight. The reaction mixture is then filtered and the precipitate washed with ethyl ether until dry to yield 1.22 g (88.4%) of the title compound, mp 256°-258° C.

Provenance & Evidence