Acetic Acid → HCID 59375142, compound

Participants

Reaction Conditions

Reaction Steps

A suspension of 7-amino-4-(3-(4-fluorobenzamido)-2-methylphenyl)-9H-carbazole-1-carboxamide (Example 54-5, 1 g, 2.210 mmol), acetone (3.4 mL, 20 eq.), and acetic acid (0.443 mL, 7.74 mmol) in 1,2-dichloroethane (220 mL) was treated with sodium triacetoxyborohydride (1.639 g, 7.74 mmol) and stirred at 40° C. for 4 h. Additional sodium triacetoxyborohydride (520 mg, 1.1 eq) and acetic acid (0.19 mL, 1.5 eq) were added and the mixture was stirred overnight. The mixture was treated with NaHCO3 (aq) and the organic phase was separated, washed with brine, dried and concentrated. The residue was purified by preparative HPLC. The appropriate effluent fractions were made basic with NaHCO3 (aq) and extracted with EtOAc. The organic phase was washed with brine, dried and concentrated. The residue was triturated with methanol to provide 4-(3-(4-fluorobenzamido)-2-methylphenyl)-7-(isopropylamino)-9H-carbazole-1-carboxamide as an off-white solid (520 mg, 48%). 1H NMR (400 MHz, DMSO-d6) δ 11.01 (1H, s), 10.09 (1H, s), 8.07 (3H, dd, J=8.8, 5.3 Hz), 7.77 (1H, d, J=7.9 Hz), 7.27-7.51 (5H, m), 7.17 (1H, d, J=6.2 Hz), 6.73-6.88 (2H, m), 6.60 (1H, d, J=8.3 Hz), 6.23 (1H, dd, J=8.8, 2.2 Hz), 5.49 (1H, d, J=7.9 Hz), 3.53 (1H, dd, J=13.8, 6.4 Hz), 1.90 (3H, s), 1.04-1.21 (6H, m). Mass spectrum m/z 495.1 (M+H)+.

Provenance & Evidence