反应详情

To a solution of tert-butyl N-tert-butoxycarbonyl-N-[(3S,7S,8R,9S)-8-cyclopent-2-en-1-yloxy-9-methyl-7-(1-naphthylmethyl)-2-oxo-1,5-dioxonan-3-yl]carbamate (210 mg, 0.353 mmol) in EtOAc (3.5 mL) was added 10% Pd/C (37.5 mg, 0.035 mmol). The reaction was put under a H2 atmosphere (balloon) and stirred at room temperature for 5 h, whereupon the H2 was purged from system and the reaction was filtered through a pad of Celite®. The pad was washed with EtOAc (2×6 mL) and the organics were combined and concentrated to dryness to afford tert-butyl N-tert-butoxycarbonyl-N-[(3S,7S,8R,9S)-8-(cyclopentoxy)-9-methyl-7-(1-naphthyl-methyl)-2-oxo-1,5-dioxonan-3-yl]carbamate (193 mg, 92%) as a white powder: mp 49-55° C.; 1H NMR (400 MHz, CDCl3) δ 8.09 (d, J=8.3 Hz, 1H), 7.82 (dd, J=8.1, 1.5 Hz, 1H), 7.74-7.67 (m, 1H), 7.54-7.41 (m, 2H), 7.40-7.31 (m, 2H), 5.05 (app t, J=7.7 Hz, 1H), 4.90-4.79 (m, 1H), 4.21-4.12 (m, 1H), 3.94 (dd, J=11.7, 7.5 Hz, 1H), 3.88 (dd, J=11.7, 8.0 Hz, 1H), 3.73 (dd, J=13.6, 2.9 Hz, 1H), 3.53-3.35 (m, 3H), 2.71 (app t, J=12.8 Hz, 1H), 2.07-1.96 (m, 1H), 1.90-1.70 (m, 6H), 1.63-1.49 (m, 5H), 1.38 (s, 18H); ESIMS m/z 620 ([M+Na]+).

1. customwas purged from system
2. filtrationthe reaction was filtered through a pad of Celite®
3. washThe pad was washed with EtOAc (2×6 mL)
4. concentrationconcentrated to dryness