... The Journal of Organic ... The combined organic layer was washed with brine (20%) and dried over MgSO 4 for 3 h. The solvent was removed to give crude 11 as a white solid ... 1 H NMR (CD 2 Cl 2 ) δ 8.05 (dd, J 1 = 8.3 Hz, J 2 = 22.2 Hz, 2H), 7.88 (dd, J 1 = 7.2 Hz, J 2 = 15.5 HZ, 2H ...