EXAMPLE 94. To a stirred solution of 4-(6-fluoropyridin-3-yl)-5,6,9,10-tetrahydro-[1,4]diazepino[1,7-h][1,7]naphthyridine-8,11-dione (31 mg, 0.096 mmol) in 1,2-dichloroethane (2 mL) POCl3 (29.3 mg, 0.19 mmol) was added and the resulting suspension was stirred at 100° C. for 1 h. The reaction mixture was cooled to rt and concentrated under reduced pressure to dryness. For complete removal of POCl3 the residue was taken up in toluene and evaporated twice again and dried under high vacuo. The resulting crude chloro compound was dissolved in 1,2-dichloroethane (5 mL), 4-isopropyl-1H-imidazole (53 mg, 0.48 mmol) was added and the mixture was stirred at 100° C. for 1 h. The reaction mixture was allowed to warm to rt and diluted with DCM. Saturated aqueous NaHCO3 solution was added and the mixture was extracted twice with DCM. The combined organic layers were dried with sodium sulfate, filtered and the solvent was removed under reduced pressure. The crude product was purified by SFC (column: DEAP 5 μm, 250×30 mm, 60A, Princeton; eluent: from 6% MeOH/CO2 to 11% MeOH/CO2 in 11 min; flow 100 mL/min; UV detection at 220 nm) and yielded the title compound as beige powder (11 mg). UPLC-MS: MS 417.2 (M+H+); UPLC rt 0.87 min. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.17-1.34 (m, 6 H), 2.81-2.98 (m, 3 H), 4.05 (br. s., 2 H), 4.40 (s, 2 H), 7.09 (dd, J=8.3, 2.8 Hz, 1 H), 7.22-7.36 (m, 2 H), 7.77 (td, J=7.9, 2.1 Hz, 1 H), 7.96 (s, 1 H), 8.03 (s, 1 H), 8.23 (d, J=1.5 Hz, 1 H), 8.68 (d, J=4.8 Hz, 1 H).
