1-Ethynyl-3-fluorobenzene → ethyl-6-Chloro-8-[(3-fluorophenyl)ethynyl]-2-(trifluoromethyl)-2H-chromene-3-carboxylate

Participants

Reaction Steps

To 0.502 g (1.161 mmole) of ethyl-6-chloro-8-iodo-2-(trifluoromethyl)-2H-chromene-3-carboxylate was added 67 mg (0.060 mmole) tetrakis(triphenylphosphine)palladium(0), 22 mg (0.116 mmole) copper (I) iodide, 10 mL degassed toluene, 0.484 mL (3.48 mmole) degassed TEA, and 0.199 mL (1.74 mmole) 3-fluorophenylacetylene. The mixture was stirred overnight at room temperature. The mixture was concd and the resulting oil was purified using reverse phase chromatography to afford 0.440 g (89%) of a crystalline solid: 1H NMR (CDCl3/400 MHz) 1.35 (t,3H, J=6.8 Hz), 4.28-4.37 (m, 2H), 5.83 (q, 1H, J=6.8 Hz), 7.04-7.09 (m, 1H), 7.18 (d, 1H, J=2.4 Hz), 7.20-7.23 (m, 1H), 7.30-7.33 (m, 2H), 7.44 (d, 1H, J=2.8 Hz), 7.63 (s, 1H); MS (ES+) 425 (M+1, 100).

Provenance & Evidence