Hydrochloric Acid → HCID 51348078, compound

Participants

Reaction Steps

To a solution of 1-(3,4-difluorophenyl)-2-phenylethanone (120 mg, 0.52 mmol), 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde (101.8 mg, 0.52 mmol), and urea (95.1 mg, 1.56 mmol) in 5 mL of ethanol was added 0.2 mL of concentrated HCl solution, and the mixture was refluxed for 2 days. After the solvent was removed under reduced pressure, the residue was purified by reverse-phase preparatory HPLC (26-53% acetonitrile+0.1% trifluoroacetic acid in water+0.1% trifluoroacetic acid, over 15 min.) to give Compound 45 (35 mg, yield 14.5%). 1H NMR (DMSO-d6 400 MHz TMS): δ 10.27 (s, 1H), 8.81 (s, 1H), 7.56 (s, 1H), 7.41 (s, 1H), 7.31 (m, 2H), 7.14 (s, 1H), 7.11-6.99 (m, 3H), 6.87 (m, 1H), 6.86 (d, J=7.2 Hz, 2H), 5.24 (d, J=2.0 Hz, 1H), 4.04 (m, 2H), 1.32 (t, J=7.2 Hz, 3H); MS (ESI): m/z 468.0[M+1]+.

Provenance & Evidence