Hydrochloric Acid → HCID 10125889, compound

Participants

Reaction Steps

The product of Example 17, Step C, 2,3,4,5,6-pentafluorophenyl 4-[[2,3-difluoro-6-[[(2-hydroxyethoxy)amino]carbonyl]phenyl]amino]benzoate (150 mg, 0.29 mmol) was dissolved in THF (2 mL), then added dropwise to a solution of NaBH4 (110 mg, 2.90 mmol) in water (2 mL). This mixture was stirred at room temperature for 2 hours, acidified with 1 M HCl, and diluted with water (50 mL). The resulting aqueous mixture was extracted with EtOAc (2×50 mL), then the combined EtOAc fractions washed with water (50 mL), saturated NaCl (50 mL), and dried (Na2SO4). The solvent was removed under reduced pressure and the resulting residue purified by column chromatography on flash silica (50% EtOAc/hexanes as eluant) to afford 3,4-difluoro-N-(2-hydroxyethoxy)-2-[[4-(hydroxymethyl)phenyl]amino]benzamide as a cream solid (36 mg, 37%); m.p. (EtOAc/hexanes) 73–77° C. 1H NMR [400 MHz, (CD3)2SO] δ 11.73 (br s, 1 H), 8.68 (br s, 1 H), 7.41–7.35 (m, 1H), 7.15 (d, J=8.5 Hz, 2 H), 7.14–7.06 (m, 1 H), 6.79 (dd, J=8.5, 2.3 Hz, 2 H), 4.99 (t, J=5.7 Hz, 1 H), 4.72 (br s, 1 H), 4.38 (d, J=5.6, 2 H), 3.80 (t, J=4.9 Hz, 2 H), 3.54 (t, J=4.9 Hz, 2 H). Anal. Calcd for C16H16F2N2O4: C, 56.8; H, 4.8; N, 8.3. Found: C, 56.3; H, 4.7; N, 8.1.

Provenance & Evidence