Preparation of Maltoheptaose Having Hydroxy Groups at Both Ends by Selective Acid Hydrolysis of Acetylated .BETA.-Cyclodextrin.

Selective acid hydrolysis of ftdly acetylatedβ-cyclodextrin 1 resulted in restricted fission of only one of the glycosidic bonds to give maltoheptaose henicosylacetate 2 having only two hydroxy groups at bothends.The structure of the product oligosaccharide was determined by IR and 1H - NMR spectra as well as elemental analysis. The deacetylation experiment of 2 gave maltoheptaose 3, supPorting further the structure 2. The benzoylation of 2 took place by the reaction of 2 withe xcessamount of benzoyl chloride.