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3,4-Dimethoxy-4'-nitrobenzophenone was prepared analogously to 3,4-dimethoxy-3'-nitrobenzophenone using veratrole (3.8 mL, 30 mmol), aluminum chloride (4.4 g, 33 mmol) and 4-nitrobenzoyl chloride (5.7 g, 30 mmol) with a reaction time of 48 hours at reflux. The crude mixture was purified by flash column chromatography (silica gel, 4% ethyl acetate/methylene chloride) to afford 1.69 g (78%) of the product as a white solid: mp 172-173° C.; 1H NMR (CDCl3) δ 8.43-8.31 (m, 2 H), 7.97-7.86 (m, 2 H), 7.55-7.46 (m, 1 H), 7.40-7.30 (m, 1 H), 7.00-6.89 (m, 1 H), 3.99 (s, 3 H), 3.96 (s, 3 H), 13C NMR (CDCl3) δ 193.4, 153.8, 149.4, 149.3, 143.8, 130.2, 130.0, 125.8, 123.4, 111.7, 109.9, 56.1, 56.0; Anal. Calcd for C15H13NO5. Theoretical: C, 62.72; H, 4.56; N, 4.88. Found: C, 62.49; H, 4.68; N, 4.86.

1. customwith a reaction time of 48 hours
2. temperatureat reflux
3. customThe crude mixture was purified by flash column chromatography (silica gel, 4% ethyl acetate/methylene chloride)