Table 2. Tricyclic Aza-Andrographolide Analogues Synthesized through Intramolecular Hydroamination^a.

^aReaction conditions: 3 (0.05 mmol, 1 equiv), PC-VI (6 mol %), 2,4,6-triisopropylbezene-1-thiol (TRIP thiol) (0.5 equiv), toluene (2 mL), blue LED (40 W), under N₂, room temperature, 12 h. Yields shown are the yields of the isolated product.