Table 3.

N-Sulfonyl Triazole Synthesis: Scope with Respect to Sulfonyl Azide^a

entry	R1	alkyne	product	time (h)	yield (%)b
1c	4-BrC6H4		13	3	86
2	4-BrC6H4		23	4.5	78
3d	4-H3COC6H4		14	6.5	94
4	4-H3COC6H4		24	7	79
5	Bn		25	3.5	87
6e	Me		26	12	88
7e	i-Pr		27	12	75
8	n-C8H17		28	3.5	92
9f			29	8.5	90
10g			30	3	82
11g			31	3	83

^a1.0 mmol scale unless otherwise noted; CuTC (10 mol %), solvent (0.2 M), alkyne (1 equiv), sulfonyl azide (1 equiv), rt.

^bIsolated yield.

^c5.0 mmol scale.

^d1.1 equiv alkyne.

^e1.3 equiv alkyne.

^f2.4 equiv alkyne.

^g1.2 equiv alkyne.