Hydrochloric Acid → HCID 59375159, compound

Participants

Reaction Steps

A solution of 5-(2,6-difluorophenyl)-N2-methoxy-N2-methyl-2,3,4,9-tetrahydro-1H-carbazole-2,8-dicarboxamide (Example 26-1, 719 mg, 1.739 mmol) in THF (1 mL) was treated with methylmagnesium bromide (3 M in diethyl ether, 2.90 mL, 8.70 mmol) at 0° C. After 20 min, additional methylmagnesium bromide (2.90 mL, 8.70 mmol) was added and stirring was continued for 30 min more. The mixture was treated with 1 M hydrochloric acid and extracted four times with DCM. The combined organic phases were washed with water, dried and concentrated. The residue was purified by column chromatography (eluting with hexane-EtOAc) and the resulting material was triturated with DCM to provide 2-acetyl-5-(2,6-difluorophenyl)-2,3,4,9-tetrahydro-1H-carbazole-8-carboxamide as an off-white solid (210 mg, 33%). 1H NMR (400 MHz, methanol-d4) δ 7.59 (1H, d, J=7.91 Hz), 7.39-7.49 (2H, m), 7.01-7.09 (3H, m), 6.90 (1H, d, J=7.91 Hz), 2.86-2.97 (3H, m), 2.24-2.33 (1H, m), 2.22 (3H, s), 2.01-2.18 (2H, m), 1.54-1.66 (1H, m). Mass spectrum m/z 369.1 (M+H)+.

Provenance & Evidence