反应详情

A mixture of N-[3-(3-methyl-but-3-enyloxy)-phenyl]-acetamide (2.5 g, 11.4 mmol) and AlCl3 (4.52 g, 34.3 mmol) in fluoro-benzene (50 mL) was heated at reflux overnight. After cooling, the reaction mixture was poured into water. The organic layer was separated and the aqueous phase was extracted with EtOAc (40×3 mL). The combined organic layers were washed with brine, dried over anhydrous Na2SO4 and concentrated under vacuum. The residue was purified by column chromatography to give N-(4,4-dimethyl-chroman-7-yl)-acetamide (1.35 g, 54%).

1. temperaturewas heated
2. temperatureat reflux overnight
3. temperatureAfter cooling
4. customThe organic layer was separated
5. extractionthe aqueous phase was extracted with EtOAc (40×3 mL)
6. washThe combined organic layers were washed with brine
7. dry with materialdried over anhydrous Na2SO4
8. concentrationconcentrated under vacuum
9. customThe residue was purified by column chromatography