m-Chloroperbenzoic acid → HCID 22055273, compound

Participants

Reaction Steps

A solution of thioacetic acid S-{4-[3-chloro-4-(3-fluoro-benzyloxy)-phenylamino]-pyrrolo[2,1-f][1,2,4]triazin-5-ylmethyl}ester (80 mg, 0.175 mmole) in dry THF (4 mL) was sparged with N2 for 15 min. NaOMe (0.40 mL, 0.5 M in MeOH, 1.1 equiv), 2-bromoethanol (0.013 mL, 1 equiv) were added and the reaction was left stirring at RT. After 16 h, the solvents were removed and the residue was partitioned between DCM and water. The organic phase was separated, dried (Na2SO4), and the solvent removed. Radial chromatography (silica gel plate eluted with DCM containing 0, 0.5, 1, 2% MeOH) afforded 2-{4-[3-chloro-4-(3-fluoro-benzyloxy)-phenylamino]-pyrrolo[2,1-f][1,2,4]triazin-5-ylmethylsulfanyl}-ethanol (35 mg, 44%): 1H NMR (CDCl3) δ 2.73 (t, 2H, J=5.9 Hz), 3.81 (t, 2H, J=5.9 Hz), 4.11 (s, 2H), 5.13 (s, 2H), 6.55 (d, 1H, J=2.6 Hz), 6.92–7.93 (m, 10H), 8.99 (s, 1H). Solid m-chloroperbenzoic acid (19 mg, 58 to 70%, 1 equiv) was added to an ice-cooled solution of the alcohol (35 mg, 0.18 mmole) in CHCl3 (4 mL). After 1 h, this was removed from the bath and washed with a 6% aq. solution of NaHSO3, sat. aq. NaHCO3 (3×) and then dried (Na2SO4). Radial chromatography (silica gel plate eluted with DCM containing 0, 0.5, 1, 2, 3% MeOH) afforded the title compound (22 mg, 60%): MS: 475 (M+H)+; HPLC Ret Time: 1.66 min (YMC Xterra C18 S7, 3.0×50 mm column, 2 min gradient, 5 mL/min).

Provenance & Evidence