反应详情

温度

50 °C

To a solution of (3aR,5R,6S,7R,7aR)-2-(dimethylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol (1 g, 4.03 mmol), DMAP (49.2 mg, 0.40 mmol) and triethylamine (611 mg, 6.05 mmol) in DMF (50 mL) was added tert-butylchlorodimethylsilane (665 mg, 4.43 mmol). After stirred overnight at 50° C., the resulting mixture was concentrated under vacuum to provide a residue, which was purified by silica gel column, eluted with 2-5% MeOH in dichloromethane to give compound 8 as a yellow solid (1.0 g, 65%). (ES, m/z): [M+H]+ 263.0; 1H NMR (300 MHz, CDCl3) δ 6.33-6.35 (d, J=6.3 Hz, 1H), 4.35-4.39 (t, J=5.7 Hz, 1H), 4.18-4.21 (t, J=4.5 Hz, 1H), 3.81-3.84 (m, 3H), 3.62-3.67 (m, 1H), 3.05 (s, 6H), 0.93 (s, 9H), 0.11 (s, 6H).

1. concentrationthe resulting mixture was concentrated under vacuum
2. customto provide a residue, which
3. customwas purified by silica gel column
4. washeluted with 2-5% MeOH in dichloromethane