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To a mixture of 65.07 g (1.0 eq) of methyl 4-(4-hydroxybutyl)benzoate and 33.20 (1.05 eq) of triethylamine in 350 mL of anhydrous ethyl ether, stirred under nitrogen and cooled to 0° C., are added in a dropwise fashion, 37.58 g (1.05 eq) of mesityl chloride. A solid forms and the reaction mixture is gradually brought to room temperature and stirred under nitrogen for 4 hours. Four hundred milliliters of water are then added and the organic layer is separated, washed with water, dried over magnesium sulfate, and concentrated to yield methyl 4-(4-mesitylbutyl)benzoate, m.p. 52°-53° C.; IR (KBr) vmax 3010, 2930, 2850, 1700, 1603, 1432, 1334, 1323, 1165, 1104, 937, 822, and 700 cm-1 ; 1H NMR (CDCl3) delta 7.92 (d, J=8.2 Hz, 2H, Ar), 7.22 (d, J=8.2 Hz, 2H, Ar), 4.18-4.22 (m, 2H, CH2OMs), 3.86 (s, 3H OCH3), 2.96 (s, 3H, SO2CH3), 2.65-2.68 (m, 2H, benzyl), 1.72-1.74 (m, 4H, 2° aliphatic).

1. customis gradually brought to room temperature
2. stirringstirred under nitrogen for 4 hours
3. customthe organic layer is separated
4. washwashed with water
5. dry with materialdried over magnesium sulfate
6. concentrationconcentrated