Formaldehyde → 1-Cyclopropyl-7-(3-ethenyl-4-methyl-1-piperazinyl)-6-fluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid

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Reaction Steps

A mixture of 200 mg of 1-cyclopropyl-7-(3-ethenyl-1-piperazinyl)-6-fluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, 0.3 ml of 90% formic acid and 0.24 ml of 37% formalin is heated for 2 hours, then evaporated. The residue is diluted with water, neutralized to pH 7 with 1N sodium hydroxide, the solid collected, and washed with water, ether and dried in vacuo, giving 150 mg of the desired product.

Provenance & Evidence