Table 2.

Scope of AgNTf₂-Catalyzed Cycloaddition Reactions^a

Entry	Catalyst mol%	Time (h)	Product	Yieldb (%)	Entry	Catalyst mol%	Time (h)	Product	Yieldb (%)
1	1.0	2		82	9	1.0	1		81
2	2.0	1.5		72	10d	2.0	3		75
3	1.0	7		78	11e	2.0	3		83
4	2.0	3		84	12d	10	22		67
					13d,f	10	7		80
5c	2.0	4		67	14	1.0	1		95
					15	0.5	3		92
6c	2.0	4		74	16	1.0	3		84
7d	2.0	3		73	17	1.0	2		85
8e	2.0	1		70	18	1.0	6		94

^aReactions were carried out using 0.5 or 1.0 mmol of diazine and 1.3 equiv of the siloxy alkyne with 8AgNTf₂ ratio of 1.1:1.

^bIsolated yields.

^cFor the determination of the regiochemistry of the product, see the Supporting Information.

^d2.0 equiv of siloxy alkyne was used.

^e1.5 equiv of siloxy alkyne was used.

^fThe reaction was carried out in refluxing CH₂Cl₂.