Table 5.

Facile O-Arylation of Carboxylic Acids^a

entry	carboxylic acid	silylaryl triflate (equiv)	CsF (equiv)	time (h)	product	% isolated yield
1		1a (2.0)	4.0	24		81
2		1a (2.0)	4.0	24		66
4		1a (2.0)	4.0	24		96
5		1b (2.0)	4.0	24		98
6		1a (2.0)	4.0	24		84
7		1c (2.0)	4.0	24		81
8		1a (2.0)	4.0	24		75
9		1a (2.0)	4.0	24		89
10		1b (2.0)	4.0	24		89
11		1a (2.0)	4.0	24		45
12		1a (2.0)	4.0	24		33

^aAll reactions were run under the following reaction conditions, unless otherwise specified: 0.25 mmol of the carboxylic acid and the indicated amount of silylaryl triflate and CsF were stirred in 4 mL of MeCN at room temperature.