反应详情

To a stirred solution of octadecylmagnesium bromide (10.2 ml of a 0.34M solution in ethyl ether, 3.46 mmol, generated from 1-bromooctadecane and magnesium using iodine as an initiator) at 0° under argon, was added dropwise 5-trimethylsilyl-3-furaldehyde (0.265 g., 1.57 mmol) in 2 ml tetrahydrofuran. This solution was allowed to warm to room temperature, stirred for 30 minutes, and quenched with a 5% ammonium chloride solution. The resulting mixture was partitioned between ethyl ether and 5% sodium bicarbonate. The organic portion was washed with 10% sodium bisulfite, water, saturated sodium chloride solution, dried over magnesium sulfate, filtered and concentrated to give a residue. This was taken up in ethyl ether and filtered. The ether portion was concentrated to give a waxy residue which was purified by flash chromatography (silica, 10% ethyl ether/petroleum ether) to give the desired alcohol.

1. customat 0°
2. customquenched with a 5% ammonium chloride solution
3. customThe resulting mixture was partitioned between ethyl ether and 5% sodium bicarbonate
4. washThe organic portion was washed with 10% sodium bisulfite, water, saturated sodium chloride solution
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated
8. customto give a residue
9. filtrationfiltered
10. concentrationThe ether portion was concentrated
11. customto give a waxy residue which
12. customwas purified by flash chromatography (silica, 10% ethyl ether/petroleum ether)