反应详情

2-Bromo-3′,4′,5′-tribenzyloxyacetophenone (5.17 g, 10.0 mmol) (11) and sodium iodide (2.25 g, 15 mmol) were dissolved in dry acetonitrile (50 mL) and stirred at room temperature overnight. The solution was filtered and acetonitrile removed under vacuum. Water (30 mL) was added and the solution was extracted with diethyl ether (4×25 mL). The organic phase was dried (MgSO4) and the solvents removed in vacuo. Recrystallisation from methylcyclohexane afforded the titled compound as yellow crystals, m.p. 110-112° C. Yield 3.6 g (64%). 1H NMR (300 MHz, CDCl3): δ=4.21 (2H, s), 5.15 (6H, s), 7.22-7.48 (17H, m); 13C NMR (75 MHz): δ=1.0, 71.3, 75.1, 109.0, 127.4, 127.9, 128.0, 128.1, 128.3, 128.4, 128.5, 136.3, 137.1, 143.4, 152.6, 191.5.

1. filtrationThe solution was filtered
2. customacetonitrile removed under vacuum
3. additionWater (30 mL) was added
4. extractionthe solution was extracted with diethyl ether (4×25 mL)
5. dry with materialThe organic phase was dried (MgSO4)
6. customthe solvents removed in vacuo
7. customRecrystallisation from methylcyclohexane