反应详情

A solution of Example 13a (0.040 g, 0.11 mmol) in tetrahydrofuran (1 mL) was treated with ethylamine (0.21 mL of a 2 M solution in tetrahydrofuran, 0.42 mmol) for 2 h. The reaction mixture was concentrated and the residue purified by preparative HPLC (C18, 10-90% acetonitrile in 0.1% TFA in water) to afford the title compound (0.025 g, 61%). 1H NMR (500 MHz, DMSO-d6) δ 1.12 (t, J=7.32 Hz, 3H), 3.25-3.32 (m, 2H), 3.54 (s, 3H), 6.23-6.24 (m, 1H), 6.95-6.99 (m, 3H), 7.11 (t, J=7.48 Hz, 1H), 7.27 (t, J=2.75 Hz, 1H), 7.31-7.37 (m, 3H), 7.84 (dd, J=8.54, 2.44 Hz, 1H), 7.98 (d, J=2.44 Hz, 1H), 8.46 (t, J=5.49 Hz, 1H), 11.99 (s, 1H). MS (ESI+) m/z 388.2 (M+H)+.

1. concentrationThe reaction mixture was concentrated
2. customthe residue purified by preparative HPLC (C18, 10-90% acetonitrile in 0.1% TFA in water)