Trifluoroacetic acid → 2-Fluoro-5-(1-(4-(methylthio)phenyl)vinyl)pyridine

Participants

Reaction Steps

1-(6-Fluoropyridin-3-yl)-1-(4-(methylthio)phenyl)ethanol (1.261 g, 4.789 mmol) was dissolved in DCM (30 mL) and trifluoroacetic acid (1.0 mL, 13 mmol) was added, turning the solution dark green. The reaction was stirred at room temperature for 45 min and then was treated with saturated sodium bicarbonate (15 mL). The reaction was stirred for about 5 min, and then the layers were separated, and the aqueous phase was extracted with DCM. The organic phases were combined, dried over sodium sulfate, filtered, concentrated, and dried under high vacuum to give 2-fluoro-5-(1-(4-(methylthio)phenyl)vinyl)pyridine (1.183 g). 1H NMR (CDCl3, 400 MHz) δ 8.23 (d, J=2.35 Hz, 1H), 7.71 (td, J=8.12 Hz, 2.54 Hz, 1H), 7.26-7.21 (m, 4H), 6.91 (dd, J=8.51 Hz, 2.64 Hz, 1H), 5.55 (s, 1H), 5.43 (s, 1H), 2.51 (s, 3H). m/z (ESI, +ve ion) 246 (M+H)+.

Provenance & Evidence