Diisopropylethylamine → HCID 67515210, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 1,1-dimethylethyl 7-(6-amino-5-nitropyridin-3-yl)-2,3-dihydro-1,4-benzoxazepine-4(5H)-carboxylate (1.1 g, 3.1 mmol) and DIPEA (2.7 mL, 16 mmol) in THF (10 mL) and NMP (5 mL) was added 3-hydroxy-3-(trifluoromethyl)-8-azabicyclo[3.2.1]octane-8-carbonyl chloride (reagent preparation 37, 0.81 g, 3.1 mmol). The reaction mixture was heated (50° C.) for four hours and partitioned between dichloromethane and saturated aqueous sodium bicarbonate. The organic layer was washed with brine, dried over magnesium sulfate, filtered and concentrated. Purification by silica gel chromatography provided 8-{[7-(6-amino-5-nitropyridin-3-yl)-2,3-dihydro-1,4-benzoxazepin-4 (5H)-yl]carbonyl}-3-(trifluoromethyl)-8-azabicyclo[3.2.1]octan-3-ol (1.1 g, 69% yield) as red oil. MS (ES) for C23H24F3N5O5: 507.2 (MH+).

Provenance & Evidence