The synthesis of 2, 8-dioxa-6-thiobicyclo [3.2. 1] octanes, substituted by alkyl or phenyl groups in positions 1, 4, or 7, is described. Four synthetic routes are compared:(i) action of sodium sulfide on 2, 4-dichloro-1, 3-dialkyldioxolanes;(ii) action of sodium sulfide on the ditosylates of 2, 4-dihydroxyalkyl-1, 3-dioxolanes;(iii) action of α-haloketones on α- thioglycerol; and (iv) action of α-hydroxyketones on α-thioglycerol. The structures of the ...