Reaction Steps
A mixture of 4-chloro-5,7-difluoro-3-methyl-2-(pyridin-2-yl)quinoline (60.7 mg, 0.21 mmol) (described herein), 6-morpholino-2′,3′,5′,6′-tetrahydrospiro[indoline-3,4′-pyran] (68.7 mg, 0.25 mmol) (described herein), Pd2dba3 (28.7 mg, 0.031 mmol), 2-(dicyclohexylphosphino)-2,4,6-tri-i-propyl-1,1-biphenyl (29.9 mg, 0.063 mmol), and sodium tert-butoxide (60.2 mg, 0.626 mmol) in toluene (3 mL) was stirred at 100° C. for 22 h, then cooled to rt and concentrated. The resulting residue was taken up in EtOAc, washed with saturated aqueous sodium bicarbonate solution, 1 M NaOH, and brine, and the organic layer dried (MgSO4) and concentrated. Chromatography afforded 1-(5,7-difluoro-3-methyl-2-(2-pyridinyl)-4-quinolinyl)-6-(4-morpholinyl)-1,2,2′,3′,5′,6′-hexahydrospiro[indole-3,4′-pyran] as a yellow solid. 1H NMR (400 MHz, chloroform-d) δ ppm 8.71-8.79 (1H, m), 7.85-7.97 (2H, m), 7.65-7.74 (1H, m), 7.42 (1H, ddd, J=7.0, 5.0, 1.7 Hz), 7.09 (1H, d, J=8.2 Hz), 6.97 (1H, ddd, J=11.6, 8.9, 2.5 Hz), 6.25-6.34 (1H, m), 5.45-5.57 (1H, m), 3.98-4.09 (2H, m), 3.86-3.96 (2H, m), 3.69-3.82 (4H, m), 3.46-3.62 (2H, m), 2.91-3.05 (4H, m), 2.39 (3H, s), 2.06-2.24 (2H, m), 1.83-1.93 (1H, m), 1.72-1.83 (1H, m). Mass Spectrum (ESI) m/e=529 (M+1).
