反应详情

(3aR,5R,6S,7R,7aR)-6,7-bis(4-methoxybenzyloxy)-5-((tert-butyldimethylsilyloxy)methyl)-N,N-dimethyl-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazol-2-amine (9.5 g, 15.8 mmol) in THF (100 mL) was treated with TBAF (8.27 g, 31.6 mmol) overnight at room temperature. The resulting solution was diluted with brine (200 mL), extracted with ethyl acetate (2×200 mL), and dried over anhydrous magnesium sulfate. After removal of solvents, the residue was purified by silica gel column, eluted with 1-2.5% MeOH in dichloromethane to give compound 10 as a yellow oil (7.0 g, 86%). (ES, m/z): [M+H]+ 489.0; 1H NMR (300 MHz, CDCl3) δ 7.32-7.62 (m, 2H), 7.22-7.28 (m, 2H), 6.85-6.91 (m, 4H), 6.26-6.28 (d, J=6.6 Hz, 1H), 4.52-4.73 (m, 4H), 4.31-4.34 (d, J=11.4 Hz, 1H), 4.23 (s, 1H), 181 (s, 6H), 3.53-3.76 (m, 4H), 3.01 (m, 6H), 1.78-1.82 (m, 1H).

1. extractionextracted with ethyl acetate (2×200 mL)
2. dry with materialdried over anhydrous magnesium sulfate
3. customAfter removal of solvents
4. customthe residue was purified by silica gel column
5. washeluted with 1-2.5% MeOH in dichloromethane