“…A similar procedure to the synthesis method of compound 11 was followed to afford compound 19 as a beige solid (0.35 g, 75%). R f = 0.42 (MeOH/ CH 2 Cl 2 = 1:9); 1 H NMR (600 MHz, DMSO-d 6 ) δ 11.86 (s, 1H), 11.16 (s, 1H), 9.00 (s, 1H), 7.72 (dd, J = 8.4, 0.3 Hz, 1H), 7.69 (d, J = 8.4 Hz, 2H), 7.54 (m, 1H), 7.35 (d, J = 8.4 Hz, 2H), 7.24 (dd, J = 9.0, 3.6 Hz, 2H), 5.34 (s, 2H); 13 2-Methylquinazolin-4(3H)-one (16a). The mixture of anthranilamide (5.00 g, 35.99 mmol) and p-toluene sulfonic acid (2.00 g, 0.3 equiv) was dissolved in triethyl orthoacetate (20 mL, 105.83 mmol), and the reaction mixture was irradiated via MW (open vessel, power time mode, 200 W) to reflux for 30 min.…”