Triethylamine → 8-Methoxy-6H-11-oxa-6-aza-benzo[a]fluoren-5-one

Participants

Reaction Steps

α-Bromodimethylhomophthalate (20a) (1.16 g) and 2-hydroxy-5-methoxy-benzonitrile (0.6 g, 4 mmol, 1 eq) were dissolved by warming in acetonitrile (6 mL). Triethylamine (5.6 mL, 10 eq) was then added and the reaction was heated at reflux for 48 h under inert atmosphere, then cooled to room temperature. The reaction mixture was diluted with saturated sodium bicarbonate (40 mL) and the resulting suspension was allowed to stir for 2 h, and was then filtered. The filtercake was washed sequentially with 1 N HCl (2×50 mL), acetonitrile (2×50 mL) and dichloromethane (50 mL), then dried in a vacuum oven at 50° C. for three days to provide Compound 22a as an white solid. Yield=0.81 g (76%).

Provenance & Evidence