Reaction Steps
Sodium hydride (1.16 g, 29.12 mmol) was added to 6-bromo-2-naphthol (5.00 g, 22.41 mmol) in anhydrous N,N-dimethylformamide (162 mL) at 0° C. After 15 minutes, benzyl bromide (2.40 mL, 3.45 g, 20.18 mmol) was added and the reaction warmed to room temperature over 18 hours. The reaction was diluted with EtOAc (500 mL), saturated aqueous NaHCO3 (200 mL) was added, and the solution was extracted with EtOAc (3×500 mL). The combined organic layers were washed with water (3×1 L), saturated aqueous NaCl solution (1 L), dried (Na2SO4), filtered, and concentrated. The residue was purified via column chromatography (SiO2, 5:1 Hexanes:CH2Cl2) to give 36 as a colorless amorphous solid (5.71 g, 90%): 1H NMR (CDCl3, 500 MHz) δ 7.94 (d, J=1.9 Hz, 1H), 7.68 (d, J=9.0 Hz, 1H), 7.61 (d, J=8.7 Hz, 1H), 7.53-7.47 (m, 3H), 7.46-7.40 (m, 2H), 7.37 (m, 1H), 7.26 (dd, J=9.0, 2.5 Hz, 1H), 7.20 (d, J=2.5 Hz, 1H), 5.18 (s, 2H); 13C NMR(CDCl3, 125 MHz) δ 157.2, 136.8, 133.2, 130.3, 129.9, 129.9, 128.9 (2C), 128.8, 128.7, 128.4, 127.8 (2C), 120.3, 117.4, 107.3, 70.3; IR (film) νmax 1585, 1452, 1256, 1219, 1204, 1165, 1065, 997, 924, 852, 820, 800, 733, 698, 476 cm−1.
