HCID 86614875, compound → HCID 178458983, compound

Participants

Reaction Steps

2-(9-chloro-6-(2-hydroxy-2-methylpropyl)-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-phenanthro[9,10-d]imidazol-2-yl)isophthalonitrile (1.94 g) from Step 3 above was dissolved in TBAF (1 M in THF, 20 mL). The mixture was heated at reflux for 5 h and then quenched with water. The aqueous layer was extracted with ethyl acetate. The organic layer was washed with brine, dried over MgSO4, filtered and concentrated. The crude material was purified by flash chromatography on silica (50% ethyl acetate in hexanes) to provide 2-[9-chloro-6-(2-hydroxy-2-methylpropyl)-1H-phenanthro[9,10-d]imidazol-2-yl]isophthalonitrile (500 mg) as a yellow solid. 1H NMR δ (ppm) (400 MHz, Acetone-d6): 13.13 (1H, bs), 8.87 (1H, s), 8.77 (1H, s), 8.58 (1H, m), 8.43 (1H, m), 8.35 (2H, d, J=7.9 Hz), 7.99 (1H, t, J=7.9 Hz), 7.73 (2H, dd, J=1.9, 8.6 Hz), 3.51 (1H, bs), 3.08 (2H, s), 1.26 (6H, s).

Provenance & Evidence