反应详情

To a stirred solution of (3R,3aS,6aR)-Hexahydrofuro[2,3-b]furan-3-yl-(1S,2R)-3-[(1,3-benzodioxol-5-ylsulfonyl)(isobutyl)amino]-1-[4-(2-{[tert-butyl(dimethyl)silyl]oxy}ethoxy)benzyl]-2-hydroxypropylcarbamate (160 mg, 0.21 mmol) in tetrahydrofuran (3 mL) at 5° C. was added a mixture of tetrabutylammonium fluoride (0.3 mL, 1M in tetrahydrofuran) and glacial acetic acid (0.3 mL) over 2 minutes. The reaction was allowed to warm to ambient temperature and stirred for 18 hours. The mixture was diluted with ethyl acetate (50 mL), washed with water (25 mL) followed by saturated sodium bicarbonate (20 mL) and then brine (20 mL), dried (magnesium sulfate) and concentrated in vacuo to afford the title compound (135 mg, quant.) as a white solid. 1H NMR (DMSO-d6): δ 0.78 (6H, dd), 1.17-1.42 (2H, m), 1.92 (1H, m), 2.33 (1H, t), 2.64-2.78 (3H, m), 2.89-3.02 (2H, m), 3.24-3.29 (1H, m), 3.52-3.73 (7H, m), 3.78-3.82 (1H, m), 3.86 (2H, t), 4.78-4.82 (2H, m), 4.99 (1H, d), 5.46 (1H, d), 6.12 (2H, s), 6.73 (2H, d), 7.02-7.28 (6H, m); MS: 637 (MH+)

1. washwashed with water (25 mL)
2. dry with materialbrine (20 mL), dried (magnesium sulfate)
3. concentrationconcentrated in vacuo