反应详情

To a vial containing methyl 6-(benzylcarbamoyl)-5,6,7,8-tetrahydro-1,6-naphthyridine-2-carboxylate was added MeOH (1 mL) and hydroxylamine potassium salt (1 mL, 1.76 mmol, 1.76 M in MeOH) and the resulting mixture was shaken at rt for 13 h. The solution was quenched with acetic acid (0.200 mL, 3.52 mmol) before being concentrated. To the resulting residue was added DMSO (1.2 mL) and it was purified via prep-HPLC to yield N6-benzyl-N2-hydroxy-7,8-dihydro-1,6-naphthyridine-2,6(5 H)-dicarboxamide (0.0113 g, 36.0%). LC-MS: (FA) ES+ 327; 1H NMR (Methanol-d4, 400 MHz) δ 7.86 (d, J=7.8 Hz, 1 H), 7.70 (d, J=8.0 Hz, 1 H), 7.25-7.19 (m, 5 H), 4.68 (s, 2 H), 4.39 (s, 2 H), 3.79 (t, J=6.0 Hz, 2 H), 3.03 (t, J=6.0 Hz, 2 H).

1. concentrationbefore being concentrated
2. additionTo the resulting residue was added DMSO (1.2 mL) and it
3. customwas purified via prep-HPLC