反应详情

A mixture of tert-butyl [(1R,2S)-2-hydroxy-2,3-dihydro-1H-inden-1-yl]-carbamate (680 mg, 2.73 mmol), DMF (21.1 mL), barium monoxide (5.02 g, 32.7 mmol), barium hydroxide (2.80 g, 16.4 mmol) and iodomethane (1.70 mL, 27.3 mmol) was stirred overnight. LC/MS showed no starting material. The reaction was quenched via addition of a saturated solution of sodium bicarbonate and was extracted with DCM. The organic layer was washed with water (3×), dried over sodium sulfate and concentrated in vacuo. The residue was purified via silica gel chromatography eluting with a gradient of 0 to 50% EtOAc in hexanes to afford the title compound (178 mg, 25%). LC/MS: Rt=1.24 min, ES+ 264 (AA standard).

1. customThe reaction was quenched via addition of a saturated solution of sodium bicarbonate
2. extractionwas extracted with DCM
3. washThe organic layer was washed with water (3×)
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated in vacuo
6. customThe residue was purified via silica gel chromatography
7. washeluting with a gradient of 0 to 50% EtOAc in hexanes