A mixture of elaidic acid (2.0 g, 7.1 mmol), DMAP (86 mg, 0.7 mmol), 1,3-thiazolidine-2-thione (1.0 g, 8.4 mmol) and DCC (1.7 g, 8.2 mmol) in dichloromnethane (20 ml) was stirred under N2 at 0° C. for 1 hour and then at ambient temperature for another 5 hours. Additional DCC (41 mg, 0.2 mmol) was added, andthe reaction was stirred at the same temperature for 2 hours. Work up followed by flash chromatography (SiO2; carbon tetrachloride-chloroform 1:0, 1:1, 0:1) gave 2.56 g (94%) of the title compound as a yellow waxy solid.
