Synthesis of 9-membered masked enediyne analogues possessing DNA intercalator and sugar moieties

Syntheses of hybrid DNA cleaving molecules which have the 9-membered enediyne structure of kedarcidin with the DNA intercalator of NCS and/or the sugar moieties were accomplished. Introduction of the sugar moieties to the masked enediyne was achieved via S-alkylation of a bromoacetate derivative with a sugar-containing thiol without the need for protection of the sugar moiety.