反应详情

温度

125 °C

A mixture of ethyl 6-(benzenesulphonylmethyl)-3-bromo-2-methoxybenzoate (Intermediate 61, 0.1 g), 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)oxazole (0.071 g), tetrakis-(triphenylphosphine) palladium (0.028 g), potassium fluoride monohydrate (0.102 g) and sodium bromide (0.045 g) in toluene (2 ml) was heated in a sealed tube under nitrogen at 125° C. for 18 hours. The mixture was diluted with ethyl acetate, washed with water, dried (MgSO4) and filtered. The filtrate was evaporated to dryness and the residue was purified by chromatography on silica, eluting with a mixture of ethyl acetate and cyclohexane with a gradient of 0-100% to give ethyl 6-(benzenesulphonylmethyl)-2-methoxy-3-(oxazol-5-yl)benzoate (0.075 g) as a yellow gum.

1. washwashed with water
2. dry with materialdried (MgSO4)
3. filtrationfiltered
4. customThe filtrate was evaporated to dryness
5. customthe residue was purified by chromatography on silica
6. washeluting with a mixture of ethyl acetate and cyclohexane with a gradient of 0-100%