反应详情

A mixture of 1-(4-fluorophenyl)-2-(3-methoxyphenyl)ethanone (Intermediate 53) (200 mg, 0.82 mmol), 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde (157 mg, 0.74 mmol), urea (134 mg, 2.23 mmol), concentrated HCl (0.06 mL, 0.74 mmol) in EtOH (5 mL) was refluxed overnight. Followed standard aqueous/EtOAc workup procedure, then purified by preparative HPLC to give Compound 108 (70 mg, yield 20%). 1H NMR (DMSO-d6 300 MHz): δ 10.29 (s, 1H), 8.77 (s, 1H), 7.55 (s, 1H), 7.45 (s, 1H), 7.27-7.24 (m, 2H), 7.20 (s, 1H), 7.15-7.09 (m, 2H), 6.99-6.94 (m, 1H), 6.59 (d, J=7.2 Hz, 1H), 6.39 (d, J=6.3 Hz, 2H), 5.22 (s, 1H), 4.07-4.05 (m, 2H), 3.49 (s, 3H), 1.33 (t, J=6.6 Hz, 3H); MS (ESI): m/z 479.9 [M+1]+.

1. temperaturewas refluxed overnight
2. custompurified by preparative HPLC