反应详情

A mixture of Example 36e (0.15 g, 0.326 mmol), 2-(dimethylamino)ethanol (0.029 g, 0.326 mmol), and triphenylphosphine (0.128 g, 0.490 mmol) in tetrahydrofuran (3 mL) was stirred at ambient temperature for 10 minutes. To this solution was added (E)-di-tert-butyl diazene-1,2-dicarboxylate (0.113 g, 0.490 mmol). The solution was stirred for three hours at ambient temperature. The solvent was removed, and the residue was purified by preparative HPLC (10-80% acetonitrile in 0.1% TFA water) to give the title compound (0.055 g, 0.104 mmol, 31.8% yield). 1H NMR (500 MHz, DMSO-d6) δ ppm 12.06 (s, 1H), 7.51 (d, J=2.44 Hz, 1H), 7.41-7.47 (m, 1H), 7.35-7.37 (m, 2H), 7.23-7.31 (m, 2H), 7.06-7.11 (m, 1H), 6.85 (d, J=8.85 Hz, 1H), 3.57 (t, J=6.71 Hz, 2H), 3.56 (s, 3H), 3.17 (q, J=7.32 Hz, 1H), 2.25 (m, 2H), 2.13 (s, 6H), 1.25 (q, J=7.48 Hz, 3H). MS (ESI+) m/z 531.2 (M+H)+.

1. customThe solvent was removed
2. customthe residue was purified by preparative HPLC (10-80% acetonitrile in 0.1% TFA water)