Trifluoroacetic acid → HCID 67442777, compound

Participants

Reaction Steps

To a solution of 287 (840 mg, 1.35 mmol) in DCM (25 mL) was added TFA (10 mL) and the reaction mixture was stirred for 18 h. The reaction mixture was concentrated, diluted with water and 4N NaOH to pH 13 to form a precipitate which was collected by filtration, washed with water, and dried and purified twice by Biotage (SNAP 50 g; MeOH/DCM: 1/99 to 15/85 over 20 CV) to produce a material that upon trituration with MeOH afforded the title compound 288 (338 mg, 0.65 mmol, 48% yield) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ (ppm): 8.72 (s, 1H), 8.54-8.49 (m, 2H), 8.30 (s, 1H), 8.19 (d, J=8.2 Hz, 1H), 7.81 (dd, J=8.0, 2.2 Hz, 1H), 7.73 (dd, J=13.5, 2.5 Hz, 1H), 7.38 (t, J=9.1 Hz, 1H), 7.20 (bd, J=8.6 Hz, 1H), 6.63 (d, J=5.5 Hz, 1H), 6.58 (bd, J=2.5 Hz, 1H), 3.37 (t, J=5.7 Hz, 2H), 3.23 (s, 3H), 2.84-2.73 (m, 4H), 2.68 (t, J=5.7 Hz, 2H), 2.59-2.51 (m, 1H), 2.00-1.50 (m, 1H), 0.72-0.58 (m, 2H), 0.50-0.36 (m, 2H).). MS (m/z): 522.6 (M+H).

Provenance & Evidence