Scheme 2.

Aryl Halides Substrate Scope and Functional Group Compatibility^a

^aReaction conditions: aryl halides 1 (0.2 mmol, 1 equiv), trialkyl phosphites 2 (0.6 mmol, 3 equiv), DBU (0.4 mmol, 2 equiv), PTZ (0.02 mmol, 10 mol %), CH₃CN/H₂O (0.25/0.75 mL), room temperature around reaction flask is 35 °C (heating caused by the 427 nm LED lamp), air, 24 h. All yields are isolated. [a] CH₃CN/H₂O (0.9/0.1 mL). [b] Trialkyl phosphites 2 (1.2 mmol, 6 equiv). [c] Gram scale reaction: 1 (5 mmol), 2 (10 mmol), DBU (10 mmol), PTZ (0.5 mmol), CH₃CN/H₂O (12/4 mL), 48 h.