反应详情

4-[7-(2-chloro-5-methoxy-phenyl)-5-methyl-benzo[1,2,4]triazin-3-ylamino]-N-methyl-N-(2-pyrrolidin-1-yl-ethyl)-benzenesulfonamide (0.297 mmol, 1.0 equiv) was dissolved in 10 mL anhydrous DCM and placed under an argon atmosphere. 4 mL of BBr3 (0.1 M) was added via syringe and the reaction was stirred at room temperature for 2 h. BBr3 was quenched with saturated NaHCO3 until pH=7. The mixture was filtered and washed with water and Et2O to give 4-[7-(2-chloro-5-hydroxy-phenyl)-5-methyl-benzo[1,2,4]triazin-3-ylamino]-N-methyl-N-(2-pyrrolidin-1-yl-ethyl)-benzenesulfonamide, as a dark green solid (120.5 mg, 74% yield). Rf=0.61 1H NMR (DMSO-d6): δ 1.90 (m, 2H), 2.01 (m, 2H), 2.72 (s, 6H), 3.06 (m, 2H), 3.30 (t, J=5.6 Hz, 2H), 3.38 (t, J=6.0 Hz, 2H), 3.59 (m, 2H), 6.89 (dd, J=8.8 Hz, J=2.9 Hz, 1H), 6.96 (d, J=2.9 Hz, 1H), 7.40 (d, J=8.6 Hz, 1H), 7.87 (d, J=8.9 Hz, 2H), 7.92 (d, J=0.9 Hz, 1H), 8.21 (d, J=1.7 Hz, 1H), 8.30 (d, J=9.0 Hz, H), 11.50 (s, 1H). MS (ES+) m/z=553 LC retention time 2.41 min. Elemental for C27H30Cl2N6O3S 5H2O Calculated: C, 47.72; H, 5.93; N, 11.37. Found: C, 46.59; H, 5.67; N, 11.42.

1. customBBr3 was quenched with saturated NaHCO3 until pH=7
2. filtrationThe mixture was filtered
3. washwashed with water and Et2O