Substrates scope of DP4-catalyzed visible light-drived guanylation of various thioureas with amines^a.

^aReaction conditions: thioureas (0.3 mmol), amines (0.6 mmol), K₂CO₃ (0.6 mmol), DP4 (1 mol%), in EtOH–H₂O (9 : 1; 3 mL), air atmosphere, a.t., 435–440 nm blue LED, isolated yields. DP4 was used in 3 mol% for 6, 7, 12, 13, 15–19, 39, 43, 44, 46. 4.0 equiv. of K₂CO₃ was used for 40–49.