Substrate scope of nitroarenes to form symmetrical diarylamines^a,b.

^aReaction conditions A: nitroarenes (0.30 mmol), Pd(acac)₂ (5.0 mol%), BrettPhos (15 mol%), TBAB (20 mol%), B₂pin₂ (0.45 mmol) and Cs₂CO₃ (0.60 mmol) in PhCF₃ (1.5 mL) at 130 ^oC for 18 hours.

^bIsolated yield.

^cCs₂CO₃ (1.0 equiv.) without TBAB at 150 °C for 24 hours.

^dCsOH·H₂O in dioxane : PhCF₃ = 1 : 3 at 150 °C for 24 hours.

^eCs₂CO₃ (1.0 equiv.) was used at 150 °C for 24 hours.