Potassium Carbonate → HCID 12073477, compound

Participants

Reaction Steps

A solution of 0.3 g (1.04 mmol) of 7-fluoro-N,N,5-trimethyl-4-oxo-3,5-dihydro-4H-pyridazino[4,5-b]-indole-1-carboxamide (obtained in stage 3.2.), of 0.120 g (0.63 mmol) of cuprous iodide, of 0.20 g (1.45 mmol) of potassium carbonate and of 0.60 g (3.19 mmol) of 3-bromo-6-methoxypyridine in 50 ml of N,N-dimethylformamide is heated at 150° C. for 20 h. The reaction mixture is cooled and concentrated under reduced pressure. Dichloromethane, water and a sodium hydroxide solution (1M) are added. The organic phase is separated by settling, washed with water, dried over sodium sulphate, filtered and concentrated under reduced pressure. The residue is purified by chromatography on a column of silica gel (eluent: dichloromethane/ethyl acetate: 100/0 to 0/100; then ethyl acetate/methanol: 95/5). The white solid obtained is recrystallized from a dichloromethane/ethyl acetate mixture and washed with diethyl ether. A white solid (0.26 g; 0.66 mmol) is isolated.

Provenance & Evidence