反应详情

Compound 33 (0.5 g, 0.86 mmol) was dissolved in dry methanolic ammonia (50 mL) and stirred for 15 h in a bomb at room temperature. The solution is then concentrated to a small volume and cooled overnight at 4° C. The crystalline product formed was filtered off, washed with cold methanol. The solid was recyrstallized from absolute ethanol to give 0.23 g (87%) of pure product: mp 209-211° C.; 1H NMR (Me2SO-d6) δ 3.60 (m, 2H, C5'H), 3.93 (m, 1H, C4'H), 4.09 (m, 1H, C3'H), 4.34 (m, 1H, C2'H), 5.11 (m, 1H, C5'OH, D2O exchangeable), 5.22 and 5.47 (2m, 2H, C2',3' OH, D2O exchangeable), 5.84 (d, 1H, J1',2' =6.3 Hz, C1'H), 7.21 (m, 2H, PhH), 7.64 (m, 2H, PhH and CONH2) and 8.44 (s, 1H, CONH2). Anal. Calc. for C11H14N2O6 (270.24): C, 48.89; H, 5.22; N,10.37. Found: C, 48.89; H, 5.42; N, 10.51.

1. concentrationThe solution is then concentrated to a small volume
2. temperaturecooled overnight at 4° C
3. customThe crystalline product formed
4. filtrationwas filtered off
5. washwashed with cold methanol