Table 2.

Scope of Potassium Heteroaryltrifluoroborates

entry	HetAr-BF3K			yield (%)
1		X = OMs	2a	93
		X = OPiv		78
2		X = OMs	2b	90
		X = OPiv		75a
3		X = OMs	2c	64
		X = OPiv		26a, b
4		X = OMs	2d	82
		X = OPiv		60
5		X = OMs	2e	69
		X = OPiv		32b
6		X = OMs	2f	83
		X = OPiv		26b
7		X = OMs	2g	79
8		X = OMs	2h	95
9		X = OMs	2i	42
10		X = OMs	2j	81
11		X = OMs	2k	91
12		X = OMs	2l	74
13		X = OMs	2m	90c

^aDioxane/H₂O (1/1), c = 0.05 and t-BuPCy₂.

^bRelative GC yield determined using dodecane as an internal standard.

^cWith 10% of impurities that cannot be separated.