Reaction of isatins and indoles using g-C₃N₄–based catalysts.

Trisindolines	SiO2@g-C3N4 (ref. 102)		CuO@g-C3N4 (ref. 103)		Fe(iii)@g-C3N4 (ref. 99)
	Time (min)	Yields (%)	Time (min)	Yields (%)	Time (min)	Yields (%)
3	45	95	60	95	30	96
15	75	83	75	80	40	80
17	35	95	55	95	27	96
18	60	90	75	89	50	90
21	60	83	75	81	50	80
23	55	91	75	90	50	87
24	55	87	75	86	50	83
25	60	81	75	80	50	82
27	70	91	70	95	55	95
29	50	85	60	87	40	90
31	35	93	55	94	30	96
84	60	93	65	95	40	95
86	75	82	75	88	40	85
87	30	95	45	93	30	93
88	75	83	75	83	55	85
99	75	91	75	94	50	92
100	60	82	75	80	50	79
165	45	95	45	95	30	95