Table 3. Determination of the Optimal Pd-to-SPO-Ad Ratio for the POPd-Ad-Catalyzed Suzuki Reaction of Phenyl Chloride and 4-Tolylboronic acid^a.

entry	POPd2-Ad (mol %)	SPO-Ad (mol %)	conversion yieldb (%)
1	1	0	95
2		2	80
3		4	27
4		10	5

^aPhenyl chloride (0.5 mmol), 4-tolylboronic acid (0.55 mmol), and 3 equiv of KO^tBu; reaction in 2 mL of 1,4-dioxane at 65 °C for 12 h.

^bDetermined by GC with a barrier discharge ionization detector (GC-BID).