Chlorine → HCID 12944901, compound

Participants

Reaction Steps

2 g of 6,7-dichloro-1-ethyl-4-oxo-1,4-dihydro quinoline-3-carboxylic acid, 3.8 g of 1-allylpiperazine and 20 cm3 of pyridine were heated under reflux. After 2 hours, dissolution of the acid was complete; after 11 hours, determination of the ionised chlorine (93% of theory) showed that the reaction was substantially complete. The solution was concentrated to dryness in vacuo, the residue was taken up in water (20 cm3) and the suspension was brought to pH 7.5 by the addition of acetic acid, whilst stirring. The precipitate was filtered off, washed with water and recrystallised from methyl cellosolve. 2.05 g of 7-(4-allylpiperazinyl)-6-chloro-1-ethyl-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid, m.p. 212° C., were obtained.

Provenance & Evidence