Table 2. Scope of the Cu(ii)/Fe₃O₄@APTMS-DFX promoted tetrazole synthesis of various substrates.

Entry	Substrate	Product	Time (h)	Isolated yield (%)
1			1	98
2			1.5	95
3			1.5	93
4			2.5	92
5			1	98
6			2.5	90
7			4	85
8			3.5	83
9			4	80
10			5	80
11			2	80
12			1	95
13			1.5	93
14			4	88
15			5	75
16			6	74
17			5	77