反应详情

To a solution of 3-methyl-5-acetoxy-isoxazole (14 g, 112 mM) in diethyl ether (400 mL) at 0° C., was added a 3M solution of phenylmagnesium bromide in diethyl ether (44.7 mL, 134 mM) dropwise. After the addition was complete, the reaction mixture was stirred for 30 minutes. When pH 7 buffer (100 mL) was added, the layers were separated. The aqueous layer was extracted with diethyl ether (2×75 mL). The combined ethereal extracts were washed with saturated aqueous sodium chloride (50 mL), dried over MgSO4, filtered and concentrated under reduced pressure to give 3-methyl-5-(1-hydroxy-1-phenylethyl)-isoxazole as an amber oil (20.2 g, 89%) that was used without further purification. 1H NMR (CDCl3, 100 MHz): δ 7.40 (m, 5H), 6.0 (s, 1H), 2.38 (s, 3H), 1.87 (s, 3H).

1. additionAfter the addition
2. additionWhen pH 7 buffer (100 mL) was added
3. customthe layers were separated
4. extractionThe aqueous layer was extracted with diethyl ether (2×75 mL)
5. washThe combined ethereal extracts were washed with saturated aqueous sodium chloride (50 mL)
6. dry with materialdried over MgSO4
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure