反应详情

A solution of 2.0 g (14.0 mmol) of methyl 3-hydroxy-5-isoxazole carboxylate and 29.2 ml (16.8 mmol) of N,N-diisopropylethylamine in 20 ml of tetrahydrofuran was treated with 1.27 ml of chloromethyl methyl ether. After being stirred at ambient temperature for 2 h, the solution was diluted with dichloromethane, washed with water, dried over MgSO4, and concentrated in vacuo. Silica gel chromatography of the residue using 10% methanol in dichloromethane provided 129.6 mg (78%) of the desired compound as a white solid. 1H NMR (CDCl3) δ 3.57 (s, 3H), 3.96 (s, 3H), 5.37 (s, 2H), 6.64 (s, 1H).

1. washwashed with water
2. dry with materialdried over MgSO4
3. concentrationconcentrated in vacuo