Table 4. Au-catalyzed reactions of 1a, m, u–y with pyridine cocatalyst ^a .

	1	R1	R2	R3	Time (h)	2	Yield b (%)
1	1u	Ph	iPr	p-O2NC6H4	21	2u	40
2	1v	Ph	Cy	p-O2NC6H4	20	2v	65
3	1w	Ph	Cyclopropyl	p-O2NC6H4	24	2w	60
4	1x	Ph	nPr	p-O2NC6H4	24	—	<1
5 c	1y	Cy	tBu	p-O2NC6H4	36	2y	72
6 d	1y	Cy	tBu	p-O2NC6H4	48	2y	18 e
7	1m	tBu	Ph	p-O2NC6H4	30	2m	75 f
8	1a	Ph	Ph	Ph	24	2a	28 g

^aReaction of 1 (0.2 mmol) were conducted in the presence of PPh₃AuNTf₂ (0.01 mmol) and pyridine (0.02 mmol) in DCE (0.4 mL) at 50 °C.

^bIsolated yield.

^cPPh₃PAuNTf₂ (0.02 mmol) and pyridine (0.02 mmol) were used.

^dPPh₃AuCl (0.02 mmol) and AgOTs (0.02 mol) were used, instead of PPh₃AuNTf₂ and pyridine.

^eDetermined by ¹H NMR using dibromomethane as an internal standard.

^f21% of 1m was recovered.

^g44% of 1a was recovered.