Acetic Anhydride → 221284-06-6

Participants

Reaction Steps

To a solution of 1-(1-(4-(4-piperidinyloxy)-2-(2,2,2-trifluoroethoxy)phenylacetyl)piperidin-4-yl)-4H-3,1-benzoxazin-2(1H)-one hydrochloride (0.90 g, 1.5 mmol) from Example 2 in CH2Cl2 (50 mL) was added acetic anhydride (0.31 mL, 3.0 mmol) and DIEA (0.52 mL, 3.0 mmol). The solution was stirred at ambient temperature for 1 h and the solvent was removed under reduced pressure. The residue was dissolved in EtOAc (100 mL) and washed with 0.25 M aqueous citric acid (50 mL), H2O (25 mL), and saturated aqueous NaHCO3 (75 mL). The organic phase was dried (MgSO4), filtered, and the solvent was removed under reduced pressure to give the title compound as an amorphous solid.

Provenance & Evidence