Cesium carbonate → HCID 71042121, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 6-[(6-chloropyridin-3-yl)methyl]-3-[(1S,2S)-2-hydroxycyclohexyl]-10-methyl-9,10-dihydropyrido[3,2-h]quinazolin-4(3H)-one (Example 1, 0.040 g, 0.092 mmol) in 2 mL of THF under an atmosphere of nitrogen was added aqueous cesium carbonate (1 M, 0.18 mL, 0.18 mmol), 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (0.057 g, 0.28 mmol), and bis(tri-tert-butylphosphine)palladium(0) (4.0 mg, 0.0078 mmol). The reaction was heated at 100° C. for 16 h, cooled to rt, diluted with ethyl acetate, and washed with saturated aqueous sodium bicarbonate and brine. The solution was dried over sodium sulfate, filtered, and concentrated in vacuo. The residue was purified via silica gel chromatography, eluting with 0-5% methanol in dichloromethane, to provide the title compound that gave a proton NMR spectra consistent with theory and a mass ion (ES+) of 483.1 for [M+H]+: 1H NMR (400 MHz, CD3OD) δ 8.92 (s, 1H), 8.52 (d, J=8.6 Hz, 1H), 8.40 (s, 1H), 8.08 (s, 1H), 7.95 (br s, 2H), 7.61-7.39 (m, 3H), 4.78 (s, 2H), 4.49 (s, 2H), 4.23 (br s, 1H), 3.92 (s, 3H), 3.74 (br s, 1H), 3.20 (s, 3H), 2.11 (br s, 1H), 1.83-1.63 (m, 5H), 1.29-1.23 (m, 2H).

Provenance & Evidence