Sodium thiocyanate → 2-(4-Fluorophenyl)acetyl isothiocyanate

Participants

Reaction Steps

4-Fluorophenylacetylchloride (Aldrich, 0.072 mL, 0.525 mmol, 2.5 eq) was added to a solution of sodium thiocyanate (0.056 g, 0.695 mmol, 3.3 eq) in ethyl acetate (2.0 mL) at room temperature and the reaction mixture was stirred for 1.5 h to afford a solution of 2-(4-fluorophenyl)ethanoyl isothiocyanate (0.263 M). A solution of 4-(2-chloropyridin-4-yloxy)-3-fluorobenzenamine (0.050 g, 0.21 mmol, 1.0 eq) in CH2Cl2 (1.0 mL) was added dropwise to the 2-(4-fluorophenyl)ethanoyl isothiocyanate solution and the reaction mixture was stirred at room temperature for 12 h. The reaction mixture was concentrated in vacuo and the resulting residue was purified by silica gel flash chromatography (Merck, 40-63 μM, 230-240 mesh, eluting 3/1 hexane/ethyl acetate) to afford the title compound (0.058 g, 64%) as a solid. 1H NMR (DMSO-d6) δ 12.46 (s, 1H), 11.84 (s, 1H), 8.35-8.33 (m, 1H), 8.02-8.33 (m, 1H), 6.99-7.52 (m, 8H), 3.84 (s, 2H); MS (ESI+) m/z 434 (M+H)+; HRMS (ESI+) calcd.: 434.0542. found: 434.0547.

Provenance & Evidence