反应详情

温度

90 °C

A solution of the product of Example 468B (0.244 g, 1.36 mmol) and pyridine (0.88 mL, 10.89 mmol) in dioxane (6 mL) was treated with excess tris(methylthio)methyl methyl sulfate (prepared using the procedures in Synthesis, 22-25, 1988; M. Barbero, S. Cadamuro, I. Degani, R. Fochi, A. Gatti, V. Regondi), stirred at 90° C. for 1.5 hours, and cooled to about 25° C. The reaction solution was decanted from the resulting solids and the solvent was removed under a stream of warm nitrogen. The residue was dissolved in hexanes and loaded onto a 2 g Alltech Seppack and eluted with hexanes followed by dichloromethane followed by 25% ethyl acetate in dichloromethane to provide the title compound (0.192 g, 50%).

1. customprepared
2. customin Synthesis, 22-25, 1988
3. temperaturecooled to about 25° C
4. customThe reaction solution was decanted from the resulting solids
5. customthe solvent was removed under a stream of warm nitrogen
6. dissolutionThe residue was dissolved in hexanes
7. washeluted with hexanes