Table 3.

Substrate scope of alkyne derivatives^a.

Entry	Substrate		Product		Yieldb(%)
1		2b	N.D.	4b	N.R.
2		2c		4c	<10
3		2d		4d	65
4		2e		4e	64
5		2f		4f	65
6		2g		4g	64
7		2h		4h	31
8c		2i		4id,e	45 (17:83)f
9		2j	,	4j	41 (30:70)f
10		2k		4k	44
11c		2l		4ld	40

^aReaction conditions: 1a (1 mmol, 0.2 M in degassed solvent), 2b–l (5 mmol), catalyst (0.1 mol %) at room temperature for 24 h unless otherwise noted. ^bIsolated yield. ^cN-Arylaminocyclopropane 1d was used instead of 1a. ^dMajor isomer shown. ^eIsomer ratio 89:11. ^fDiastereoisomeric ratios (cis/trans) were determined by ¹H NMR spectroscopy of the crude products.