Table 2. Initial Reaction Development with and without Catalyst.

	R1/R2	IPrAuTFA 6 h, 50 °C	uncat. 6 h, 50 °C	uncat. 17 h, 110 °C
1a	Ph/Bu	90%	<1%	58%
1c	4-BrC6H4/n-Bu	93%	4%	89%
1f	Ph/TMS	87%	<1%	<1%