Table 3. Reaction scope with arylzinc reagents ^a .

^aValues are isolated yields from 0.5 mmol scale reactions. 2 mol% NiBr₂ for 38 and 42; 3 mol% NiBr₂ for 34, 35, 37, 39 and 40; 5 mol% NiBr₂ for 33, 36, 41, 43 and 44.

^b40 °C.

^c60 °C.

^dRoom temperature, 48 h.