m-Chloroperbenzoic acid → HCID 71224558, compound

Participants

Reaction Conditions

Reaction Steps

To a cold (0° C.) solution of Example 1C (100 mg, 0.450 mmol) in dichloromethane (1.5 mL) was added meta-chloroperoxybenzoic acid (122 mg, 0.495 mmol) in a single portion. After 1 hour, the reaction mixture was partitioned between 10% sodium thiosulfate solution and ethyl acetate. The layers were separated, and the organic layer was washed with saturated sodium bicarbonate solution, dried with anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was dissolved in N,N-dimethylformamide (3 mL). Hunig's base (157 μl, 0.900 mmol) and 4-(4-methylpiperazin-1-yl)aniline (86 mg, 0.450 mmol) were added to the solution, and the reaction mixture was heated at 100° C. overnight. The reaction mixture was cooled to room temperature and partitioned between water and ethyl acetate. The organic layer was concentrated under reduced pressure. The crude residue was purified by RP-MPLC (125 g C-18 silica gel), eluting with a gradient of 5 to 50% acetonitrile in water each containing 0.1% TFA, to provide the title compound. MS ESI(+) m/z 366.2 [M+H]+; 1H NMR (300 MHz, DMSO-d6): δ ppm 10.33 (s, 1H), 9.22 (s, 1H), 7.77-7.62 (m, 2H), 6.99-6.91 (m, 2H), 3.63 (s, 3H), 3.20-3.02 (m, 4H), 2.46-2.43 (m, 4H), 2.22 (s, 3H).

Provenance & Evidence