ethyl 5-acetyl-1-(4-fluorophenyl)-8-nitro-4,5-dihydro-1H-pyrazolo[4,3-c]quinoline-3-carboxylate → ethyl 1-(4-fluorophenyl)-8-nitro-4,5-dihydro-1H-pyrazolo[4,3-c]quinoline-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

The material from step 1 of Example 24 (5 g, 0.0117 mol) was suspended in 100 mL absolute EtOH and 60 mL 1N HCl. The mixture was then heated to 80° C. for 18 hours. The heating was then terminated and the compound filtered upon cooling, to give the pure desired product as an orange solid. 3.8 g. (MW=382.35, 85% yield). LC/MS m/z=383.4 (m+1).

Provenance & Evidence