“…Yield (68%), mp 204-206 °C (dioxane); IR (KBr) ν max : 3401 (NH), 3037, 2975 (C-H), 1718, 1668 (2C=O), cm −1 ; 1 H NMR (DMSO-d 6 ): δ 2.24 (s, 3H, CH 3 ), 7.24-8.06 (m, 13H, ArH), 10.12 (s, 2H, 2CHO), 12.90 (s, 2H, 2NH); MS m/z (%): 596 (M + , 2), 446 (68), 402 (45), 298 (32), 241 (100), 150 (38), 122 (47), 114 (36), 105 (47), 76 (85), 51 (42)…”