A mixture of 3-tert-butyloxycarbonyl-6-(3-chloropropyl)-1,2,3,4,5,6-hexahydroazepino[4,5-b]indole (213 mg), phenol (90 mg), DMF (2.0 mL), and K2CO3 (81 mg) was heated at 100° C. for 16 h, then allowed to cool to room temperature. The mixture was diluted with EtOAc (50 mL), then washed with water (3×10 mL). The organic layer was dried (MgSO4), filtered, and concentrated. Purification by flash chromatography (silica gel, 3:1 hexane:EtOAc) gave 205 mg of the title compound as an oil: 1H NMR (300 MHz, CDCl3) δ 7.45-7.55, 6.8-7.35, 4.33, 3.90, 3.55-3.75, 2.90-3.10, 2.12-2.28, 1.49; MS (ESI) m/z 421 (M+).
