Table 3.

Ni-catalyzed Borylation of Heteroaryl Bromides with BBA

entry	product		time	temperature	yield (%)
1		3a	4 h	rt	94
2a		3b	4 h	rt	85
3a		3c	6 h	rt	74
4		3d	4 h	rt	92
5		3e	4 h	rt	91
6b		3f	12 h	rt	82
7		3g	6 h	rt	86
8b		3h	4 h	80 °C	72
9b		3i	4 h	80 °C	74
10b		3j	4 h	80 °C	81
11b		3k	4 h	80 °C	83
12b		3l	4 h	80 °C	83

^aNiCl₂(dppp) (0.5 mol %), PPh₃ (1 mol %)

^bNiCl₂(dppp) (5 mol %), PPh₃(10 mol %)