Table 3.

One-Pot Preparation of Potassium Azidoaryltrifluoroborates^a

entry	X–Ar–BF3K		reaction time (h)	product		yield
1		1a-Br 1a-I	7 1		1b	95% 95%b
2		2a-Br 2a-I	9 6		2b	90% 93%
3		3a	24		3b	73%
4		4a	8		4b	93%
5		5a	12		5b	90%
6		6a	4		6b	92%c
7		7a	12		7b	83%c
8		8a	12		8b	91%c
9		9a	1		9b	98%
10		10a	1		10b	98%
11		11a	3		11b	95%
12		12a	3		12b	95%
13		13a	12		13b	90%
14		14a	10		14b	(82%)c,d
15		15a	13		15b	(82%)e
16		16a	5 min		16b	96%

^aAll reactions were performed on a 1.0 mmol scale in 4 mL of DMSO and monitored by ¹H NMR in D₂O. Yields are given for isolated products.

^bReaction was performed on a 3.0 mmol scale.

^cProducts were obtained as amorphous solids.

^dProduct was contaminated with about 10% of 14a.

^eProduct was contaminated with about 15% of the azide product.