Cesium fluoride → HCID 58790382, compound

Participants

Reaction Steps

Bromothienopyridine 50 (0.88 g, 2.38 mmol), boronate 363 (1.00 g, 3.40 mmol), and tetrakis(triphenylphosphine)palladium (0.10 g, 0.086 mmol) were dissolved in dry DME (100 mL). Cesium fluoride (1.26 g, 8.3 mmol) and sodium bicarbonate (0.70 g, 8.3 mmol) were dissolved in water (5 ml each) and added to the reaction mixture, which was then heated to reflux for 4 h, cooled, and concentrated. The residue was partitioned between ethyl acetate and water, washed with brine, dried (anhydrous MgSO4), filtered, and concentrated. The residue was purified by flash chromatography (eluent 75% dichloromethane/hexanes) to afford 364 (0.85 g, 78% yield). 1H NMR (400 MHz, CDCl3) δ (ppm): 8.60 (d, J=6.3, 1H); 8.27-8.24 (m, 2H); 8.18 (s, 1H); 7.58-7.54 (m, 1H); 7.45-7.36 (m, 2H); 7.31 (t, J=2.0, 1H); 7.07-7.04 (m, 1H); 6.78 (d, J=6.1, 1H); 4.21 (t, J=5.9, 2H); 3.79 (t, J=6.3, 2H); 2.29 (quint, J=6.1, 2H). LRMS (M+H): 459.1.

Provenance & Evidence