反应详情

温度

80 °C

A mixture of 2,6-dimethylphenol (10.5 g, 85.95 mmol), propionic acid (4.64 mL, 86.81 mmol), and trifluoromethanesulfonic acid (59 g) was heated to 80° C. for 48 h, then poured onto ice. The mixture was extracted with chloroform and this organic phase was washed with aqueous bicarbonate and brine. The organic layer was dried and concentrated to a dark orange oily solid. The residue was kugelrohr distilled at 1.5 mm Hg and the following fractions were collected: 23-105° C. (pot temperature), discarded forerun; 105-135° C., 11.2 g (73%) of 2,6-dimethyl-4-propionylphenol as a yellow-white solid which had NMR identical to that of preparation 15.

1. additionpoured onto ice
2. extractionThe mixture was extracted with chloroform
3. washthis organic phase was washed with aqueous bicarbonate and brine
4. customThe organic layer was dried
5. concentrationconcentrated to a dark orange oily solid
6. distillationThe residue was kugelrohr distilled at 1.5 mm Hg
7. customthe following fractions were collected
8. custom23-105° C. (pot temperature)
9. custom105-135° C., 11.2 g (73%) of 2,6-dimethyl-4-propionylphenol as a yellow-white solid which
10. customof preparation 15