反应详情

温度

0 °C

A 25 mL round bottom flask equipped with a magnetic stir bar was charged with 0.103 g (0.20 mmol) of the product of Step F, 0.073 g (0.28 mmol) of N-methyl-2,4-dinitrobenzenesulfonamide and 0.157 g (0.60 mmol) of triphenylphosphine. The solids were dissolved in 2 mL of benzene, and the atmosphere in the flask was evacuated and purged with nitrogen. The reaction mixture was stirred and cooled to 0° C. with an external ice-water bath and then 95 μL (0.60 mmol) of diethyl azodicarboxylate was added. The reaction mixture was allowed to warm to room temperature and was stirred an additional 1 h at which point TLC analysis (75% ethyl acetate-hexanes) indicated consumption of the starting material. The reaction mixture was then evaporated in vacuo and the residue was purified on a Biotage Flash 40i chromatography apparatus (40 g Flash 40S silica gel cartridge) eluted with 50% ethyl acetate-hexanes. Evaporation of the purified fractions and drying in vacuo afforded the title compound as an amorphous yellow solid.

1. customA 25 mL round bottom flask equipped with a magnetic stir bar
2. customthe atmosphere in the flask was evacuated
3. custompurged with nitrogen
4. temperatureto warm to room temperature
5. customconsumption of the starting material
6. customThe reaction mixture was then evaporated in vacuo
7. customthe residue was purified on a Biotage Flash 40i chromatography apparatus (40 g Flash 40S silica gel cartridge)
8. washeluted with 50% ethyl acetate-hexanes
9. customEvaporation of the purified fractions
10. customdrying in vacuo