反应详情

The product of Example 12A (76 mg, 0.24 mmol) was treated with fumaric acid (29 mg, 0.25 mmol) in EtOAc/EtOH (v.1:1, 4 mL) at ambient temperature for 10 hours. The title compound was obtained as solid (94.6 mg, yield, 90%). 1H NMR (300 MHz, CD3OD) δ 1.88-2.21 (m, 3H), 2.33-2.48 (m, 1H), 2.59-2.66 (m, 1H), 3.22-3.50 (m, 5H), 3.84-3.95 (m, 1H), 5.41-5.49 (m, 1H), 6.55 (dd, J=3.4, 1.0 Hz, 1H), 6.68 (s, 2H), 7.11 (dd, J=7.5, 1.0 Hz, 1H), 7.24 (t, J=8.1 Hz, 1H), 7.36 (d, J=3.1 Hz, 1H), 7.48 (dt, J=8.1, 0.7 Hz, 1H), 8.89 (s, 2H) ppm. MS (DCI/NH3): m/z 321 (M+H)+. Anal. Calculated for C19H20N4O.C4H4O4:C, 63.29; H, 5.54; N, 12.84. Found: C, 62.95; H, 5.85; N, 12.61.