Nano-MgFe₂O₄/Cu-catalysed reaction of styrene episulfide with phenylacetylene and sodium azide under different conditions^a.

Entry	MgFe2O4/Cu (g)	Solvent	Time (h)	Temperature (°C)	Yieldb (%)
1	—	H2O	11	60	0
2	0.005	H2O	5	60	40
3	0.01	H2O	5	60	75
4	0.02	H 2 O	2.5	60	96
5	0.03	H2O	2.4	60	96
6	0.02	CH3CN	3	82	50
7	0.02	EtOH	3	78	60
8	0.02	MeOH	3	65	60
9	0.02	EtOAc	3	77	65
10	0.02	DMF	3	100	55
11	0.02	THF	20	60	0
12	0.02	n-Hexane	20	68	0
13	0.02	CCl4	20	77	0
14	0.02	H2O	10	25	45
15	0.02	H2O	6	45	70
16c	0.02	H2O	4	60	Trace
17d	0.02	H2O	3	60	92

^aAll reactions were carried out with styrene episulfide (1 mmol), phenylacetylene (1 mmol) and sodium azide (1.2 mmol).

^bIsolated yields.

^cCatalysed by MgFe₂O₄.

^dCatalysed by Cu nanoparticles.