Dichloromethane → 5-(Chloromethyl)-2-methoxypyridine

Temperature

100 °C

To a solution of the above compound (0.033 g, 0.078 mmol) in a mixture of 1.4 mL of THF and 0.15 mL of water under an atmosphere of nitrogen was added 5-(chloromethyl)-2-methoxypyridine hydrochloride (0.024 g, 0.12 mmol), cesium carbonate (0.061 g, 0.19 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloro-palladium(II), 1:1 complex with dichloromethane (9.0 mg, 0.011 mmol). The mixture was heated to 100° C. for 15 h, cooled to rt, and diluted with ethyl acetate. The organic solution was washed with saturated aqueous sodium bicarbonate and brine, dried over sodium sulfate, filtered, and concentrated in vacuo. The residue was purified via silica gel chromatography, eluting with 15-80% ethyl acetate in hexanes, to provide the title compound that gave a proton NMR spectra consistent with theory and a mass ion (ES+) of 418.0 for [M+H]+: 1H NMR (400 MHz, CDCl3) δ 8.99 (dd, J=4.0, 1.6 Hz, 1H), 8.27 (dd, J=7.2, 1.2 Hz, 1H), 8.25 (s, 1H), 8.07 (d, J=2.4 Hz, 1H), 7.99 (d, J=7.6 Hz, 1H), 7.52 (dd, J=8.4, 4.4 Hz, 1H), 7.48 (d, J=7.6 Hz, 1H), 7.33 (dd, J=8.4, 2.4 Hz, 1H), 6.62 (d, J=8.8 Hz, 1H), 5.17-5.24 (m, 1H), 4.38 (s, 2H), 4.23 (dd, J=10.8, 5.2 Hz, 1H), 4.12 (dd, J=10.8, 3.6 Hz, 1H), 3.95-4.01 (m, 1H), 3.89 (s, 3H), 3.58-3.64 (m, 1H), 3.38 (t, J=10.8 Hz, 1H), 2.11-2.21 (m, 1H), 1.98-2.05 (m, 1H).

1. temperaturecooled to rt
2. washThe organic solution was washed with saturated aqueous sodium bicarbonate and brine
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue was purified via silica gel chromatography
7. washeluting with 15-80% ethyl acetate in hexanes

ORD record

ord-23a55bc737a0411b96cfbef9211ddd15

Source dataset

uspto-grants-2013_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08557992B2