Table 3.

Sequential [3,3]/1,2-acyloxy migration/cycloisomerization

entry	substrate 39		cat.	time, min	product 40	yield, %a
1		b	AgBF4	2		>99
2		c	AgBF4	180		73b
3			TMSOTf	600		70b
4		d	AgBF4	15		73
5		e	AgBF4	15		84
6		f	AgBF4	15		90
7		g	AgBF4	10		86
8		a	Cu(OTf)2	15		60c
9		h	Cu(OTf)2	180		81b
10		i	AuCl3	15		78b,c
11		j	Cu(OTf)2	15		91c

^aRun on 1.0 mmol scale.

^bRun on 0.5 mmol scale.

^cRun in toluene.