反应详情

3-methyl-1,2-benzisoxazol-6-ol (10 g, 67 mmoles) (prepared following M. A. Elkasaby, Indian J. Chem., 1987, 26, 620) and DMF (50 ml) were added to a mixture of tert-butyldimethylsilyl chloride (1.05 eq, 10.6 g), imidazole (2.5 eq, 11.4 g) and DMF (100 ml) under N2. The mixture was then stirred at room temperature for 1 h, poured into water and extracted with ethyl acetate, dried over Na2SO4, filtered and concentrated under vacuum to give a crude product. Flash chromatography (AcOEt/Toluene 18/85 with 0.1% TEA) gave 6-[(tert-butyl(dimethyl)silyl) oxy]-3-methyl-1,2-benzisoxazole (17.1 g, 97%).

1. extractionextracted with ethyl acetate
2. dry with materialdried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated under vacuum
5. customto give a crude product