反应详情

A solution of 0.23 g (0.47 mmol) of 6 in 4 mL of THF was cooled to 0° C. and treated with 0.24 mL (0.59 mmol) of n-butyllithium (2.5M solution in hexanes) and allowed to reach room temperature for 20 min. After cooling the reaction to 0° C., 0.103 mL (1.66 mmol) of iodomethane was added as a solution in 2 mL of THF. The reaction was allowed to warm to room temperature for 30 min at which time the reaction was quenched with a few drops of saturated ammonium chloride. The reaction was dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by flash chromatography eluting with 80% hexanes/AcOEt to give 0.14 g (60%) of the title compound as a white solid. MS Calcd.: 499. Found: 500 (M+H).

1. temperatureAfter cooling
2. customthe reaction to 0° C.
3. customwas quenched with a few drops of saturated ammonium chloride
4. dry with materialThe reaction was dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified by flash chromatography
8. washeluting with 80% hexanes/AcOEt