P-Toluic Acid → (4-Methoxyphenyl)(4-methylphenyl)methanone

Beteiligte Stoffe

Reaktionsschritte

Praseodymium (III) trifluoromethanesulfonate (1.18 g as a wet solid), trifluoromethanesulfonic acid (0.30 g), anisole (2.38 g) and para-toluic acid (2.72 g) were refluxed together in 175 mL toluene with azeotropic removal of the lower water layer (Dean-Stark apparatus). After 22 hours, the mixture was cooled and extracted with 3×25 mL water, then by 2×25 mL saturated sodium bicarbonate solution. The organic layer was dried using anhydrous sodium sulfate, filtered, then concentrated down in vacuo to give crude 4-methoxy-4′-methylbenzophenone (2.7 g, 60% yield) as a cream-colored crystalline solid.

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