反应详情

A 200 mg portion of 1-ethyl-6-fluoro-1,4-dihydro-7-[3-(methoxymethyl)-1-piperazinyl]-4-oxo-3-quinolinecarboxylic acid was dissolved in a mixture of 0.6 ml of 37% formaldehyde and 0.75 ml of 90% formic acid, heated on a steam bath for 3 hours and then concentrated in vacuo. The residue was dissolved in 5 ml of water and 1N sodium hydroxide was added to pH 7. The resulting solid was collected, washed with water and dried, giving 180 mg of the desired product, mp 228°-230° C.

1. temperatureheated on a steam bath for 3 hours
2. concentrationconcentrated in vacuo
3. dissolutionThe residue was dissolved in 5 ml of water
4. addition1N sodium hydroxide was added to pH 7
5. customThe resulting solid was collected
6. washwashed with water
7. customdried