Table 1. Selected Data from Optimization Study^a.

entry	catalyst	temp (°C)	cat. loading (% mol)	yieldb
1	AuCl	50	2.5	0
2	AuCl3	50	2.5	0
3	IPrAuOAc	50	2.5	0
4	IPrAuOTs	50	2.5	34
5	IPrAuTFA	50	2.5	90
6	NaTFA	50	2.5	0
7	None	50	0	0
8	IPrAuCl	50	2.5	0
9	AgTFA	50	2.5	48
10	IPrAuTFA	50	1.0	85c
11	IPrAuTFA	50	5.0	90
12	IPrAuTFA	50	10	92
13	IPrAuTFA	25	10	89d

^aReactions were carried out on a 0.10 mmol scale.

^bYields were determined by the ERECTIC method using mesitylene as ¹H NMR external standard.

^c23 h.

^d22 h.