8-Hydroxyquinoline → HCID 57950478, compound

Participants

Reaction Conditions

Reaction Steps

A suspension of 4-(pyrimidin-2-ylmethoxy)pyridin-2(1H)-one (242 mg, 1.19 mmol), tert-butyl 7-bromo-5-methyl-3,4-dihydro-1H-pyrido[4,3-b]indole-2(5H)-carboxylate (522 mg, 1.43 mmol), CuI (272 mg, 1.43 mmol), 8-hydroxyquinoline (35 mg, 0.24 mmol) and Cs2CO3 (426 mg, 1.31 mmol) in DMSO (10 mL) was degassed under reduced pressure for 45 min. The suspension was put under Ar and heated at 135° C. with stirring overnight. The suspension was cooled, 40:9:1 CH2Cl2/MeOH/NH4OH (50 mL) was added, and the resulting suspension was stirred at 25° C. for 1 h. The suspension was passed through a plug of silica gel, and the filtrate was washed with brine. The solution was dried over Na2SO4 and concentrated under reduced pressure. Flash chromatography (silica gel, (1:1 EtOAc/hexanes)/(4:0.9:0.1 CH2Cl2/MeOH/NH4OH), 100:0 to 0:100) yielded the title compound (256 mg, 44%) as a yellow solid: 1H NMR (500 MHz, CDCl3) δ 8.81 (d, J=4.5 Hz, 1H), 7.50 (d, J=8.0 Hz, 1H), 7.32 (d, J=7.5 Hz, 1H), 7.31-7.27 (m, 3H), 7.01 (br d, J=8.0 Hz, 1H), 6.17 (dd, J=7.5, 2.8 Hz, 1H), 6.00 (d, J=2.8 Hz, 1H), 5.32 (s, 2H), 4.64 (br s, 2H), 3.88-3.79 (m, 2H), 3.62 (s, 3H), 2.84-2.78 (m, 2H), 1.50 (s, 9H).

Provenance & Evidence