反应详情

To a solution of 3-(tert-butyldimethylsilyloxy)benzo[f][1,7]naphthyridin-5-amine (from step 4) (1.0 eq.) in tetrahydrofuran (0.05 M) was added tetra-n-butylammonium fluoride (TBAF) (1.0 eq.) and acetic acid (1.0 eq.). The reaction was stirred for 15 minutes, and then concentrated en vacuo. The crude residue was suspended in water and neutralized by addition of saturated aqueous NaHCO3 solution to pH 7. The solids were filtered, washed with acetone, and dried to give 5-aminobenzo[f][1,7]naphthyridin-3(4H)-one. 1H NMR (DMSO d-6): δ 8.59 (d, 1H), 8.20 (d, 1H), 7.49 (d, 1H), 7.37-7.41 (dd, 1H), 7.23-7.27 (dd, 1H), 6.88 (br, 2H), 6.79 (d, 1H). LRMS [M+H]=212.1

1. concentrationconcentrated en vacuo
2. additionneutralized by addition of saturated aqueous NaHCO3 solution to pH 7
3. filtrationThe solids were filtered
4. washwashed with acetone
5. customdried