Potassium Phosphate, Tribasic → HCID 59756910, compound

Participants

Reaction Steps

Trifluoromethanesulfonic anhydride (0.08 mL, 0.48 mmol) was dropwise to a solution of toluene (2 mL) and aqueous 30% K3PO4 (2 mL) containing the intermediate from Step D (63 mg, 0.22 mol). The solution was stirred at room temperature until no starting material remained by HPLC analysis. The solution was partitioned between ethyl acetate and water. The organic phase was washed with water and brine. The solution was then dried over MgSO4, filtered and concentrated. The residue was purified by silica gel chromatography using a hexanes/ethyl acetate gradient to give the title compound. 1H NMR (500 MHz, CDCl3): δ 8.01 (d, J=8.2 Hz, 2H); 7.27 (d, J=8.1 Hz, 2H); 7.08 (dd, J=2.3, 8.2 Hz, 1H); 6.95 (d, J=2.1 Hz, 1H); 3.95 (s, 3H); 3.56-3.50 (m, 1H); 3.15 (dd, J=6.2, 13.5 Hz, 1H); 2.92-2.80 (m, 3H); 2.28-2.20 (m, 1H); 1.90-1.83 (m, 1H). LCMS2 2.71 min. (M+H)=415

Provenance & Evidence