反应详情

To a solution of the alcohol obtained in step 2 (10 g) in dimethylacetamide (100 ml) at room temperature were added triphenylphosphine (23 g) and carbon tetrabromide (29 g). The resulting solution was stirred at room temperature for 1 h, poured into water and extracted with ethyl acetate. The organic phase was washed with water and brine, dried over sodium sulfate and filtered over silica gel to give 13 g of the desired product as a white solid (95%) which was characterized by its mass and NMR spectra.

1. extractionextracted with ethyl acetate
2. washThe organic phase was washed with water and brine
3. dry with materialdried over sodium sulfate
4. filtrationfiltered over silica gel