Hydrochloric Acid → 4-[(E)-2-ethoxyvinyl]-1-[(4-fluorophenyl)methyl]pyrrolo[2,3-c]pyridine-5-carbohydroxamic acid

To methyl 4-[(E)-2-ethoxyvinyl]-1-(4-fluorobenzyl)-1H-pyrrolo[2,3-c]pyridine-5-carboxylate (0.1 g, 0.28 mmol) in methanol (10 mL) were added hydroxylamine (1 mL, 50% in water, 15.2 mmol) and sodium hydroxide (63.8 mg, 1.59 mmol). The mixture was stirred at room temperature for 2 h, and 4N hydrochloric acid (0.5 mL, 1.9 mmol) was added. The mixture was concentrated to provide 100 mg of the title compound that was used without further purification in the next step. 1H NMR (DMSO-d6) δ ppm 11.76 (d, 1H, J=1.9 Hz), 8.88 (d, 1H, J=1.9 Hz), 8.60 (s, 1H), 7.83 (d, 1H, J=3.0 Hz), 7.31 (t, 2H, J=8.9 Hz), 7.22 (d, 1H, J=13.2 Hz), 7.05 (t, 2H, J=8.9 Hz), 6.82 (d, 1 H, J=3.0 Hz), 6.66 (d, 1 H, J=13.2 Hz), 5.54 (s, 2H), 3.96 (q, 2H, J=7.0 Hz), 1.28 (t, 3H, J=7.0 Hz). LCMS (APCl, M+H+): 356.

1. concentrationThe mixture was concentrated

ORD record

ord-a1cd88a7ca054135bb84867581177f98

Source dataset

uspto-grants-2010_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07692014B2