Table 2. Focused solvent screening for selected catalysts ^a .

2	Ar	Measured% ee
		Anhydr. toluene	Wet toluene	MTBE	CPME	EtOAc	2-MeTHF
ab	2-F-4-Br-C6H3	90.2	90.2	86.8	88.6	77.8	79.0
al	2-F-4-SiMe3-C6H3	90.4	91.8	93.7	92.3	88.9	89.2
am	2-F-4-l-C6H3	88.8	88.6	87.1	87.0	78.1	80.5
an	2-F-4-Bpin-C6H3	87.3	87.8	89.4	88.7	83.2	84.9

^aΔΔG^‡ given in parentheses in kcal mol^–1; MTBE = methyl tert-butyl ether; CPME = cyclopentyl methyl ether.