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2-(3,4-Dimethoxybenzoyl)naphthalene was prepared analogously to 3,4,3',4'-tetramethoxybenzophenone using veratrole (2.6 mL, 20 mmol), aluminum chloride (2.9 g, 22 mmol) and 2-naphthoyl chloride (3.9 g, 20 mmol) with a reaction time of 4 hours at reflux. The crude product was purified by flash column chromatography (silica gel, 2.5% ethyl acetate/methylene chloride) to afford 4.52 g (77%) of the product as a white solid: mp 120-121.5° C.; 1H NMR (CDCl3) δ 8.24 (s, 1 H), 8.03-7.84 (m, 4 H), 7.68-7.40 (m, 4 H), 7.00-6.87 (m, 1 H), 3.97 (s, 3 H), 3.95 (s, 3 H); 13C NMR (CDCl3) δ 195.5, 153.0, 149.0, 135.5, 134.9, 132.2, 131.0, 130.4, 129.2, 128.1, 128.0, 127.8, 126.7, 125.9, 125.4, 112.2, 109.8, 56.1, 56.0; Anal. Calcd for C19H16O3. Theoretical: C, 78.06; H, 5.52. Found: C, 77.73; H, 5.69.

1. customwith a reaction time of 4 hours
2. temperatureat reflux
3. customThe crude product was purified by flash column chromatography (silica gel, 2.5% ethyl acetate/methylene chloride)