Triphenylphosphine → Methyl 2-(2-((2-(methylthio)-5-(trifluoromethyl)pyrimidin-4-yl)ethynyl)phenyl)acetate

Participants

Reaction Conditions

Reaction Steps

4-Iodo-2-(methylthio)-5-(trifluoromethyl)pyrimidine (I14) (2.00 g, 6.24 mmol), PdCl2(PPh3)2 (438 mg, 625 μmol), CuI (119 mg, 625 μmol) and triphenylphosphine (164 mg, 625 μmol) were placed into an oven dried microwave reaction vial under nitrogen. Methyl 2-(2-ethynylphenyl)acetate (I4) (1.31 g, 7.49 mmol), THF (20 mL) and TEA (10 mL) were added and the resulting mixture was stirred at 100° C. under microwave irradiation for 10 minutes. The volatiles were evaporated under reduced pressure then the residue was adsorbed onto silica from DCM. The pre-adsorbed material was chromatographed on silica gel (0-25% ethyl acetate/petroleum benzine 40-60° C.) to give the title compound (I64) (1.571 g, 69%) as an orange solid; 1H NMR (400 MHz, CDCl3) δ 8.71 (d, J=0.8 Hz, 1H), 7.68 (dd, J=7.7, 1.1 Hz, 1H), 7.50-7.29 (m, 3H), 3.93 (s, 2H), 3.71 (d, J=3.4 Hz, 3H), 2.62 (d, J=3.4 Hz, 3H).

Provenance & Evidence