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1-(3,4-Dimethoxybenzoyl)naphthalene was prepared analogously to 3,4,3',4'-tetramethoxybenzophenone using veratrole (1.3 mL, 10 mmol), aluminum chloride (1.5 g, 11 mmol) and 1-naphthoyl chloride (1.5 mL, 10 mmol) with a reaction time of 24 hours at room temperature. The crude product was purified by flash column chromatography (silica gel, 2.5% ethyl acetate/methylene chloride) to afford 1.85 g (63%) of the product as a white solid: mp 92.5-94.5° C.; 1H NMR (CDCl3) δ 8.06-7.84 (m, 3 H), 7.80-7.39 (m, 5 H), 7.31-7.21 (m, 1 H), 6.84-6.74 (m, 1 H), 3.94 (s, 3 H), 3.91 (s, 3 H); 13C NMR (CDCl3) δ 196.6, 153.5, 149.0, 136.8, 133.6, 131.1, 130.9, 130.5, 128.2, 126.9, 126.7, 126.3, 126.3, 125.6, 124.3, 111.3, 109.7, 56.0, 55.9; Anal. Calcd for C19H16O3. Theoretical: C, 78.06; H, 5.52. Found: C, 77.97; H, 5.66.

1. customwith a reaction time of 24 hours
2. customat room temperature
3. customThe crude product was purified by flash column chromatography (silica gel, 2.5% ethyl acetate/methylene chloride)