Derivatives of bicyclic lactols

摘要

Racemic or optically active compounds with antitumor activity of the formula: <IMAGE> wherein X is oxygen or sulfur; R1 is hydrogen, C1 to C4 alkanoyl, benzoyl or phenyl-substituted benzoyl; R2 is hydrogen or C1 to C4 alkanoyl; R3 is C2 to C40 straight or branched chain alkyl substituted by hydroxy, epoxy, amino, C1 to C6 alkylamino, C1 to C6 dialkylamino, C1 to C6 alkanoyloxy or, C1 to C4 alkoxycarbonyl; cyclohexyl, phenyl unsubstituted or substituted by halogen, amino, C1 to C4 alkyl-substituted amino, C1 to C4 alkoxy, nitro, or hydroxy; C1 to C6 alkanoyl; allyl or phenyl-C1 to C4 alkyl unsubstituted or substituted by a C2 to C6 alkene group; or where X is sulfur R3 is as defined above or is C1 to C40 straight or branched chain alkyl; and DIFFERENCE represents the exo- or endo-steric position in the ring and indicates an alpha - or beta -steric position in the side chain are disclosed.