反应详情

The solution of 2-Acetyl-4-bromophenol (1.754 g, 8.16 mmol), 2-(tetrahydrofuran-2-yl)acetaldehyde (2.1 g) and purrolidine (0.4 mL) in MeOH was heated to reflux for 2 h. The reaction mixture was cool down to room temperature and evaporated. The residue was dissolved in EA, washed with 1 M HCl, 1 M NaOH (2×50 mL), brine (100 mL) successively, then, dried over anhydrous Na2SO4, and filtered, and concentrated. The residue was purified by flash chromatography on silica gel eluting with EA in hexane (0-20%) to give 6-bromo-2-((tetrahydrofuran-2-yl) methyl)chroman-4-one (464 mg); MS ESI +ve m/z 311 (M+H)+.

1. temperatureto reflux for 2 h
2. customevaporated
3. dissolutionThe residue was dissolved in EA
4. washwashed with 1 M HCl, 1 M NaOH (2×50 mL), brine (100 mL) successively
5. dry with materialdried over anhydrous Na2SO4
6. filtrationfiltered
7. concentrationconcentrated
8. customThe residue was purified by flash chromatography on silica gel eluting with EA in hexane (0-20%)