Piperazine → HCID 12899683, compound

Participants

Reaction Steps

20.0 g of 8-(p-nitrobenzenesulfonyloxy)-6,7-dihydro-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxylic acid and 12.9 g of piperazine were added to 200 ml of anhydrous dimethyl sulfoxide and the mixture was heated in an autoclave under flow of nitrogen at 10 atm. at a temperature of 150° to 160° C. for 17 hours while stirring. Treatment in an analogous manner as in Example 15 gave 2.1 g of 8-(1-piperazinyl)-6,7-dihydro-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxylic acid as white needles having a melting point of 267° to 268° C.

Provenance & Evidence