Dimethylformamide → HCID 178521108, compound

Participants

Reaction Conditions

Reaction Steps

Oxalyl chloride (20 ml, 0.2 mol) was added dropwise over 2 min to a stirred solution of 3-(6-fluoro-3-oxo-3,5-dihydro-pyrazolo[4,3-c]quinolin-2-yl)-benzoic acid (intermediate 3) (2.0 g, 6.1 mmol) in dichloromethane (10 ml) at room temperature. N,N-Dimethylformamide (50 μl) was then added and the resulting mixture heated to 50° C. for 1 h. The solution was then cooled to room temperature and then concentrated in vacuo to leave the title compound (intermediate 4) (2.0 g, 96%) as a beige solid.

Provenance & Evidence