According to the general cyclization procedure (for Example 27), 0.60 mmol of 4,7-dimethyl-1H-indole-2,3-dione (105 mg) and 0.70 mmol of (4-fluoro-benzyl)-[1,2,4]triazole-3,4-diamine (145 mg) in 2 mL of ethylene glycol was stirred at 125° C. overnight (18 hr). The mixture was cooled to room temperature, diluted with water (10 mL), stirred for 15 min. The precipitated product was collected by filtration, washed with MeOH+water 1:1. Dried on high vacuum. The crude product (187 mg) was suspended in anhydrous ethanol (6 mL), heated to reflux, sonicated while hot, allowed to cool overnight, filtered, washed with ice-cold methanol, filtered and dried on high vacuum.
