Triphenylphosphine → 6-Chloro-2-iodo-3-(2-(thiophen-3-yl)ethoxy)pyridine

Participants

Reaction Steps

To a solution 6-chloro-2-iodopyridin-3-ol (6.75 g, 26.4 mmol), 2-(3-thienyl)ethanol (3.79 mL, 34.4 mmol), and triphenylphosphine (9.01 g, 34.4 mmol) in tetrahydrofuran (140 mL) was added diisopropyl azodicarboxylate (6.76 mL, 34.4 mmol) dropwise. The reaction mixture was stirred at room temperature overnight. The reaction mixture was concentrated and purified by column on silica gel (eluted at EtOAc/Hexanes=1:20) to give 5.5 g of 6-chloro-2-iodo-3-(2-(thiophen-3-yl)ethoxy)pyridine. Yield: 58%. 1H NMR (DMSO, 400 MHz): δ7.50-7.43 (m, 3H), 7.34 (d, J=1.6 Hz, 1H), 7.17 (d, J=4.8 Hz, 1H), 4.29 (t, J=6.4 Hz, 2H), 3.10 (t, J=6.4 Hz, 2H). LC-MS (ESI): m/z=366 [M+H]+

Provenance & Evidence