Cesium carbonate → cis-N-{4-[(6-bromopyridin-3-yl)oxy]tetrahydrofuran-3-yl}propane-2-sulfonamide

Participants

Reaction Steps

Trans-4-[(6-bromopyridin-3-yl)oxy]tetrahydrofuran-3-yl methane sulfonate (591.7 mg, 1.75 mmol), propane-2-sulfonamide (647 mg, 5.25 mmol) and cesium carbonate (855 mg, 2.62 mmol) were combined in acetonitrile (8 mL) and subjected to microwave irradiation for 55 minutes at 150° C. The crude reaction mixture was combined with several similar reactions run under the same conditions (total starting material used: 1.527 g, 4.515 mmol) and shaken with saturated aqueous sodium bicarbonate solution (100 mL). The aqueous layer was extracted with ethyl acetate, and the combined organic layers were dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified via silica gel chromatography (Gradient: 5% to 40% ethyl acetate in heptane) to provide the title compound. Yield: 382 mg, 1.046 mmol, 23%. 1H NMR (400 MHz, CDCl3) δ 1.34 (d, J=6.8 Hz, 3H), 1.36 (d, J=6.8 Hz, 3H), 3.17 (septet, J=6.8 Hz, 1H), 3.74 (dd, J=9, 9 Hz, 1H), 3.94 (dd, J=10.9, 1.5 Hz, 1H), 4.14 (dd, J=8, 8 Hz, 1H), 4.19 (dd, J=10.9, 4.3 Hz, 1H), 4.27 (m, 1H), 4.84 (m, 1H), 5.66 (d, J=9.9 Hz, 1H), 7.20 (dd, J=8.8, 3.2 Hz, 1H), 7.40 (d, J=8.8 Hz, 1H), 8.01 (d, J=3.2 Hz, 1H).

Provenance & Evidence