Ethanol → tert-butyl (1-(4-(2-phenethyl-9H-benzo[f]imidazo[1,2-d]pyrido[2,3-b][1,4]diazepin-3-yl)phenyl)cyclobutyl)carbamate

Participants

Reaction Conditions

Reaction Steps

To a suspension of 3-bromo-2-phenethyl-9H-benzo[f]imidazo[1,2-d]pyrido[2,3-b][1,4]diazepine (0.197 g, 1 eq.) in a mixture of toluene (10 mL), ethanol (10 mL), and saturated sodium bicarbonate (4 mL) was added tert-butyl (1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)cyclobutyl)carbamate (0.353 g, 2 eq.). The reaction was degassed (nitrogen) for 5 minutes and tetrakis(triphenylphosphine)palladium(0) added (0.054 g). The reaction was again degassed for 5 minutes and stirred at 100° C. overnight. The reaction mixture was cooled to room temperature and poured onto water (100 mL). The aqueous phase was extracted with dichloromethane (2×100 mL) and the organic extracts were combined and washed with brine (1×100 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure. Purification by column chromatography (10-60% ethyl acetate in hexanes) gave tert-butyl (1-(4-(2-phenethyl-9H-benzo[f]imidazo[1,2-d]pyrido[2,3-b][1,4]diazepin-3-yl)phenyl)cyclobutyl)carbamate (0.042 g, 15%) as a yellow solid. LCMS: 584 [M+H].

Provenance & Evidence