Pyridine → HCID 10071889, compound

Participants

Reaction Steps

A stirred solution of 4-[(6-ethyl-8-fluorophenanthridin-5(6H)-yl)sulfonyl]phenol (Example 40, Step d, 0.06 g, 0.16 mmol) in dichloromethane (2 mL) was treated sequentially with pyridine (0.05 mL, 0.63 mmol) and propionyl chloride (0.03 mL, 0.3 mmol). After stirring for twelve hours at room temperature, the reaction was quenched with a saturated, aqueous, sodium bicarbonate solution (50 mL). The separated aqueous phase was extracted with dichloromethane (3×10 mL). The combined organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo to a crude product. The crude product was purified by flash column chromatography on silica gel, eluting with a mixture of ethyl acetate-hexane (1:9 to 1:4 gradient) to yield the title compound as a white solid (0.05, 77%), m.p. 111-112° C.;

Provenance & Evidence