4-Chloro-3-methyl-2-(pyridin-2-yl)-1,8-naphthyridine → 4-(3-methyl-2-(2-pyridinyl)-1,8-naphthyridin-4-yl)-6-(4-morpholinyl)-3,4-dihydro-2H-1,4-benzoxazine

Participants

Reaction Steps

Prepared according to procedure Y by using 6-morpholino-3,4-dihydro-2H-benzo-[b][1,4]oxazine (68 mg, 0.31 mmol), 4-chloro-3-methyl-2-(pyridin-2-yl)-1,8-naphthyridine (79 mg, 0.31 mmol), XPhos precatalyst (23 mg, 0.031 mmol) in toluene (5 mL) for 2 h at 100° C. Purification by reverse phase HPLC (10 to 60% acetonitrile in water) gave 4-(3-methyl-2-(2-pyridinyl)-1,8-naphthyridin-4-yl)-6-(4-morpholinyl)-3,4-dihydro-2H-1,4-benzoxazine. 1H NMR (400 MHz, chloroform-d) δ ppm 9.10 (1H, dd, J=4.1, 2.0 Hz), 8.71 (1H, ddd, J=4.8, 1.9, 1.0 Hz), 8.16-8.24 (2H, m), 7.92 (1H, td, J=7.7, 1.8 Hz), 7.37-7.45 (2H, m), 6.89 (1H, d, J=8.8 Hz), 6.31 (1H, dd, J=8.8, 2.7 Hz), 5.60 (1H, d, J=2.7 Hz), 4.42-4.52 (2H, m), 3.80-3.87 (1H, m), 3.62-3.76 (5H, m), 2.68-2.80 (4H, m), 2.53 (3H, s). Mass Spectrum (ESI) m/e=440.0 (M+1).

Provenance & Evidence