2-{4-[1-(2-Methylphenyl)-1-hydroxymethyl]phenyl}-4,4-dimethyl-2-oxazoline → 2-[4-(2-Methylbenzoyl)phenyl]-4,4-dimethyl-2-oxazoline

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Reaction Steps

2-{4-[1-(2-Methylphenyl)-1-hydroxymethyl]phenyl}-4,4-dimethyl-2-oxazoline (3.0 g), manganese dioxide (20 g) and dichloromethane (50 ml) are mixed at room temperature. The mixture is stirred at room temperature for two hours, and refluxed for three hours. The insoluble materials are removed by filtration through celite, and washed with chloroform, and the mother liquor is concentrated to give 2-[4-(2-methylbenzoyl)phenyl]-4,4-dimethyl-2-oxazoline (2.86 g) as pale yellow oil. 1H-NMR (200 MHz, CDCl3) δ ppm: 1.40 (6H, s), 2.33 (3H, s), 4.14 (2H, s), 7.12-7.54 (4H, m), 7.76-7.92 (2H, m), 7.95-8.14 (2H, m).

Provenance & Evidence