Acetonitrile → 2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-9-(1-(2-(tetrahydro-2H-pyran-2-yloxy)ethyl)-1H-imidazol-5-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine

Participants

Reaction Conditions

Reaction Steps

Tetrakis(triphenylphosphine)palladium(0) (84.0 mg 0.0727 mmol) was added last to a degassed solution of 9-bromo-2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine (272 mg, 0.727 mmol) and regioisomers 1-(2-(tetrahydro-2H-pyran-2-yloxy)ethyl)-4-(tributylstannyl)-1H-imidazole and 1-(2-(tetrahydro-2H-pyran-2-yloxy)ethyl)-5-(tributylstannyl)-1H-imidazole (600 mg, 1 mmol) in acetonitrile (5 mL, 100 mmol). The reaction was heated in the CEM microwave at 140° C. for 30 minutes with complete conversion by LCMS. Concentrated in vacuo and flash purified 0 to 100% methanol/dichloromethane. The product tubes were concentrated in vacuo to give 270 mg of the regioisomers 2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-9-(1-(2-(tetrahydro-2H-pyran-2-yloxy)ethyl)-1H-imidazol-4-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine and 2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-9-(1-(2-(tetrahydro-2H-pyran-2-yloxy)ethyl)-1H-imidazol-5-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine. These inseparable compounds were dissolved in 4 N HCl in dioxane (10 mL) and the solution was stirred for 30 minutes at room temperature. Complete deprotection was confirmed by LCMS to give the final compounds which were purified by SFC to separate the regioisomer 208 (27 mg, 9% yield, M+1 406.1)

Provenance & Evidence