Ethylene Glycol → 10-(2-Fluorophenyl)-1,2,3,4,5,6-hexahydroazepino[4,5-b]indole

Participants

Reaction Steps

3-Benzoyl-10-(2-fluorophenyl)-1,2,3,4,5,6-hexahydroazepino[4,5-b]indole (3.50 g, 9.1 mmol), potassium hydroxide (11.80 g, 183 mmol), and ethylene glycol (80 mL) were heated to 170° C. for 6.6 hours. The reaction was diluted with water and extracted with ethyl acetate. The organic layers were combined, washed with brine, dried over MgSO4 and concentrated in vacuo to give a red oil which was passed through a column of silica gel with 1:19 methanol/chloroform with 1% NH4OH to give 2.43 g (95%) of a white solid as the title compound: mp 121.8-126.3° C. 1H NMR (400 MHz, CDCl3) δ 8.02 (br s, 1H), 7.42-7.34 (m, 3H), 7.26-7.16 (m, 3H), 6.98 (d, J=7.2 Hz, 1H), 3.16-2.86 (m, 6H), 2.58-2.53 (m, 1H), 2.46-2.39 (m, 1H); MS m/z 281.2 (M++H).

Provenance & Evidence