Water → HCID 67503655, compound

Participants

Reaction Conditions

Reaction Steps

5H-benzo[e]pyrido[3,2-b][1,4]diazepin-6(11H)-one (0.5 g, 1 eq.) was suspended in dimethylformamide (DMF) (15 mL). The reaction was cooled to 0° C. and sodium hydride (60% in mineral oil) (230 mg, 2.5 eq.) was added. The reaction was warmed to room temperature and stirred until gas evolution ceased. The reaction was cooled to 0° C. and methyl 4-chloro-3-oxobutanoate (0.360 g, 1 eq.) was added. The reaction was stirred at room temperature overnight. The reaction was poured onto 50 mL water and extracted with dichloromethane (2×50 mL). The organic extracts were combined, washed with water (2×50 mL), brine (2×50 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure, giving 360 mg of crude product. Additional material was recuperated from the aqueous phase through extraction with ethyl acetate (3×50 mL). The ethyl acetate extracts were combined, washed with water (2×50 mL), brine (2×50 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure, giving additional 135 mg of crude product. The crude product, 3-oxo-4-(6-oxo-6,11-dihydro-5H-benzo[e]pyrido[3,2-b][1,4]diazepin-5-yl)butanoate was used without purification. LCMS: 326 [M+H].

Provenance & Evidence