Table 1. Optimization of the Reaction Conditions.

entry	catalyst	conv. (%)	yield (%)a
1	KF	46	42
2	KCl	23	19
3	KBr	11	2
4	KI	<5	trace
5	NaF	27	22
6	CsF	65	55
7	MgF2	<5	trace
8	TBAF	>95	50
9	TBAT	94	75
10b	TBAT	71	65
11b,c	TBAT	>95	93 (89)d

^aDetermined by ¹H NMR analysis using mesitylene as internal standard.

^bPTFE vessel was used instead of glassware.

^cThe reaction was carried out for 3 h.

^dIsolated yield.