Sodium Carbonate → 2-Amino-5-(4-trifluoromethylphenyl)pyrazine

Participants

Reaction Steps

A 100 mL round bottom flask was charged with 2-amino-5-iodopyrimidine (3.66 g, 21.1 mmol), (4-(trifluoromethyl)phenyl)boronic acid (4.00 g, 21.1 mmol) and MeCN (84 mL). Stirred 15 minutes at room temperature until a nice clear solution is obtained. The resulting solution is then treated with 1,1′-Bis(diphenylphosphino) ferrocene-palladium(II)dichloride dichloromethane complex (508 mg, 695 μmol) was added followed by the sodium carbonate 1M aq. (52.7 mL, 52.7 mmol). Reaction refluxed for 2 hours. Reaction cooled down to room temperature and dissolved with ammonium chloride solution (aq. sat.). Aqueous layer extracted with ethyl acetate (3×). Combined organic layers washed with brine (1×), dried over sodium sulfate, filtered and concentrated to give the crude material. Purification by silica gel flash chromatography (Ethyl Acetate/DCM) provide the title compound as a light yellow solid (4.4 g, 87%). 1H NMR (400 MHz, DMSO-d6) δ 6.76 (s, 2H) 7.76 (d, J=8.41 Hz, 2H) 7.99 (d, J=1.57 Hz, 1H) 8.14 (d, J=8.22 Hz, 2H) 8.62 (d, J=1.37 Hz, 1H). MS (M+1): 240.2.

Provenance & Evidence