Table 4.

Scope of olefins in the [3+2] cycloaddition.

Entry	Substrate	Olefin	Product[a]	t [h]	Yield [%][b]
					d.r.[c]
1[d]	1a			2	52 1:1
2	5d			12	30 (67)[e] >25:1
3	5a			6	72 3:1
4	1a			6	82 2:1
5	1a			6	40 2:1

^[a]Only the major diastereoisomer shown.

^[b]Combined yield of the two isomers after chromatography.

^[c]Determined by ¹H NMR analysis of the crude products.

^[d]Two isomers shown.

^[e]Based on recovered 5d.