Table 4. Recycling Studies for the Isomerization Reaction of 1a.

	trial 1,a yield (%)b	trial 2,c yield (%)b	trial 3,d yield (%)b
cycle 1	81	81	80
cycle 2	68	78	74
cycle 3	64	29	72
cycle 4	0	2	24

^aPdCl₂ (5 mol %); reactions conducted in CH₂Cl₂ at 25 °C for 5 h for each cycle. All operations were under an atmosphere of N₂.

^bIsolated yield of 1b.

^cPdCl₂ (10 mol %); reactions conducted in CH₂Cl₂ at 25 °C for 5 h for each cycle.

^dPdCl₂ (20 mol %); reactions conducted in CH₂Cl₂ at 25 °C for 2 h for each cycle.