Catalytic C–C coupling reaction of aryl halides with PhB(OH)₂ in the presence of Cu–ninhydrin@GO–Ni MNPs.

Entry	Aryl halide	Product	Time (min)	Yield (%)	TON	TOF (h−1)
1			50	97	45.7	54.90
2			120	96	45.3	22.64
3			135	91	42.9	19.08
4			115	93	43.7	22.89
5			95	95	44.8	28.30
6			260	92	43.4	10.01
7			60	89	42.0	42.0
8			65	97	45.7	42.23
9			140	94	44.3	19.00
10			240	90	42.4	10.61
11			420	93	43.7	6.27