Abstract Reaction of lithiated sulfone 3 with trimethyl (oxiranyl) silane 4, followed by acid hydrolysis, afforded the (Z)-allylic alcohol 6 contaminated with its (E) isomer. Epoxidation of 6 by the Sharpless procedure yielded the hydroxy epoxide, which was isolated as its enantiomerically pure 3, 5-dinitrobenzoyl derivative 7 and transformed into (+)-disparlure 1 via alcohol 8 and tosylate 9.
