. 2021 Nov 13;12(48):15988–15997. doi: 10.1039/d1sc05294b

The intramolecular guanylation for 2-amino-benzimidazoles and 2-amino-quinazolines synthesis.

Reaction conditions: TA1–9 (0.3 mmol), K₂CO₃ (0.6 mmol), DP4 (1 mol%), in EtOH–H₂O (9 : 1; 3.0 mL), air atmosphere, a.t., 435–440 nm blue LED, isolated yields.

56–58 (0.3 mmol), DDQ (0.45 mmol), in MeCN (3.0 mL), a.t.