反应详情

The title compound was prepared according to the method of Example 94b, employing methyl (2Z)-2-{[(benzyloxy)carbonyl]amino}-3-(4-bromo-2-thienyl)acrylate (96a) (8.13 g, 20.5 mmol), triethylamine (1.43 g, 14.1 mmol), and 2-aminothiophenol (14.0 g, 112 mmol) in anhydrous methanol (80 mL). Purification by flash chromatography an silica gel eluting with 4:1 (v/v) hexane/ethyl acetate yielded a solid, which was recrystallized from 6:1 (v/v) hexane/ethyl acetate to afford the title compound (4.90 g, 46%) as a white solid. 1H NMR (300 MHz, d6-DMSO) δ3.44 (s, 3H), 4.63 (t, 1H, J=8.1 Hz), 4.92 (d, 1H, J=7.4 Hz), 5.09 (m, 2H), 5.46 (bs, 2H), 6.38 (t, 1H, J=7.5 Hz), 6.66 (d, 1H, J=8.3 Hz), 6.80 (s, 1H), 6.99-7.03 (m, 2H), 7.32-7.39 (m, 5H), 7.52 (s, 1H), 8.28 (d, 1H, J=9.2 Hz). MS APCI, m/z=521, 523. LC/MS: 2.71 min.

1. customThe title compound was prepared
2. customPurification by flash chromatography an silica gel eluting with 4:1 (v/v) hexane/ethyl acetate
3. customyielded a solid, which
4. customwas recrystallized from 6:1 (v/v) hexane/ethyl acetate