Gram-scale synthesis of 3aa and 3afa^,b.

Entry	S/C	3/g	Time	Yield%
1	1000	3aa/0.451	10 min	99
2c	5000	3aa/2.252	24 h	99
3d	5000	3aa/2.253	2.5 h	99
4e	10 000	3aa/4.505	22 h	99
5f	5000	3af/2.090	48 h	99

^aReaction conditions unless otherwise specified: 1a (0.8091 mmol), 1.5 eq. of AgOOCCF₃, 15 mL of ethanol.

^bIsolated yield.

^c1a (4.0453 mmol).

^d1a (4.0453 mmol), 2 eq. of AgOOCCF₃.

^e1a (8.0906 mmol), 2 eq. of AgOOCCF₃.

^f1a (4.0453 mmol), 2 eq. of AgOOCCF₃, 15 mL of ethanol.