反应详情

To a solution of 96.6 mg (0.17 mmol) of (1S)-1-{[4-(1H-imidazol-1-yl)phenoxy]methyl}-2,2-dimethylpropyl (1S)-1-{(1S)-1-hydroxy-2-[(2-pyridinylsulfonyl)amino]ethyl}pentylcarbamate & (1S)-1-{[4-(1H-imidazol-1-yl)phenoxy]methyl}-2,2-dimethylpropyl (1S)-1-{(1R)-1-hydroxy-2-[(2-pyridinylsulfonyl)amino]ethyl}pentylcarbamate in 1.7 mL of chloroform was added 85 mg (0.2 mmol) of Dess-Martin periodinane, and the mixture was stirred at room temperature for 1 h. A second portion of 15 mg (0.035 mmol) of Dess-Martin periodinane was added, and the reaction mixture was stirred for 0.5 h. It was then diluted with ethyl acetate and a saturated aqueous sodium thiosulfate solution. The layers were mixed vigorously, before a saturated aqueous sodium bicarbonate solution was added. The layers were separated, and the organic phase was dried over anhydrous magnesium sulfate and concentrated. The residue was purified by silica gel column chromatography eluting with a methanol:chloroform solution (1:9) to yield 21.6 mg (23%) of (1S)-1-{[4-(1H-imidazol-1-yl)phenoxy]methyl}-2,2-dimethylpropyl (1S)-1-{[(2-pyridinylsulfonyl)amino]acetyl}pentylcarbamate. ES-LCMS m/z 572 (M+H) retention time=2.83 min. HRMS C28H37N5O6S m/z 572.2543 (M+H)Cal; 572.2526 (M+H)Obs.

1. stirringthe reaction mixture was stirred for 0.5 h
2. additionwas added
3. customThe layers were separated
4. dry with materialthe organic phase was dried over anhydrous magnesium sulfate
5. concentrationconcentrated
6. customThe residue was purified by silica gel column chromatography
7. washeluting with a methanol