Sodium Bromide → 1-[3-(5-Bromo-2-methoxy-benzyl)-azetidin-1-yl]-2,2,2-trifluoro-ethanone

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Reaction Steps

To a solution of 2,2,2-trifluoro-1-[3-(2-methoxy-benzyl)-azetidin-1-yl]-ethanone (95 mg, 0.35 mmol) in acetone (2 mL) and water (2 mL) was added NaBr (143 mg, 1.40 mmol) followed by Oxone (210 mg, 0.35 mmol). After 5 h, 10% sodium metabisulfite solution was added. After 1 h, EtOAc was added and the aqueous portion extracted twice with EtOAc. The combined organics were dried (Na2SO4) and concentrated. The crude product was purified by RP HPLC (basic conditions) to provide the title compound (66 mg, 53%). MS (ESI): mass calcd. for C13H13BrF3NO2, 352.1; m/z found, 354.1 [M+H]+. 1H NMR (CDCl3): 7.32 (dd, J=8.7, 2.5 Hz, 1H), 7.17 (d, J=2.5 Hz, 1H), 6.75 (t, J=10.2 Hz, 1H), 4.43 (dd, J=9.6, 8.4 Hz, 1H), 4.26-4.14 (m, 1H), 4.09 (dd, J=9.6, 5.7 Hz, 1H), 3.89 (dd, J=10.7, 5.7 Hz, 1H), 3.81 (s, 3H), 3.14-2.96 (m, 1H), 2.90 (d, J=7.8 Hz, 2H).

Provenance & Evidence