Hydroquinone → HCID 59285341, compound

Participants

Reaction Conditions

Reaction Steps

A reaction flask with a septum cap was charged with 30% sodium metal dispersion in paraffin wax (0.30 g, 4.0 mmol; Aldrich) and a solution of 2,12-dimethyl-6,7,8,9,10,11-hexahydro-5H-7,11-epiminocycloocta[b]indole (0.48 g, 2.0 mmol; Example 114A) in dimethyl sulfoxide (4 mL). The vessel was sealed, flushed with nitrogen, and stirred for 10 minutes. A solution of 2-methyl-5-vinylpyridine (0.238 g, 2.0 mmol; prepared as described in International Publication No. WO 2001017968) and hydroquinone (0.072 g, 0.66 mmol; Aldrich) in anhydrous dimethyl sulfoxide (1.5 mL) was added and the reaction was heated at 100° C. for 72 hours. After cooling the mixture to room temperature, it was poured into water and extracted with ethyl acetate (4×25 mL). The combined organic extracts were washed with brine, concentrated, and purified by reverse-phase HPLC [Waters XBridge™ C18 5 μm OBD column, 30×100 mm, flow rate 40 mL/minute, 5-95% gradient of acetonitrile in buffer (0.1 M aqueous ammonium bicarbonate, adjusted to pH 10 with ammonium hydroxide) over 15 minutes] to afford the title compound: 1H NMR (300 MHz, methanol-d4) δ ppm 0.82-1.00 (m, 1H), 1.17-1.30 (m, 1H), 1.32-1.42 (m, 1H), 1.55-1.64 (m, 1H), 1.78-1.99 (m, 3H), 2.15 (s, 3H), 2.40 (s, 6H), 2.66 (dd, J=17, 7 Hz, 1H), 3.06-3.15 (m, 3H), 4.03 (t, J=3 Hz, 1H), 4.30-4.37 (m, 2H), 6.95 (dd, J=8, 1 Hz, 1H), 7.08-7.14 (m, 2H), 7.26 (d, J=8 Hz, 1H), 7.32 (dd, J=8, 2 Hz, 1H), 7.82 (d, J=2 Hz, 1H); MS (DCI/NH3) m/z 360 (M+H)+.

Provenance & Evidence