The reduction mechanism of vinclozoline, 3-(3,5-dichlorophenyl)-5-methyl-5-vinyl-1,3-oxazolidine-2,4-dione, was studied in a nonaqueous environment in the presence of beta-cyclodextrin (betaCD) by electrochemical methods combined with GC/MS identification of the reaction products. UV-vis measurements confirmed the formation of a 1:1 complex between vinclozoline and betaCD. The reduction mechanism of vinclozoline changes in the presence of betaCD from a predominant formation of 3,5 -dichloroaniline to the formation of dechlorinated products. The C-N bond between the phenyl and oxazolidine rings remains intact during the redox process.