Table 2. Isomerization of Substituted 2-(3-Butenyl)-benzoic Acids.

entry	R, reactant	product	yield (%)a
1	3-CH3, 2a	2b	76
2	4-CH3, 3a	3b	85
3	5-CH3, 4a	4b	81
4	6-CH3, 5a	5b	83
5	4-F, 6a	6b	79
6	5-F, 7a	7b	56
7	4-Cl, 8a	8b	92
8	5-Cl, 9a	9b	97
9	3-OMe, 10a	10b	30
10	4-OMe, 11a	11b	97
11	6-OMe, 12a	12b	81
12	3-NO2, 13a	13b	0
13	4-OH, 6-OH, 14a	14b	0
14	4-OAc, 6-OAc, 15a	15b	92

^aIsolated yield.