Monotosylated α- and β-cyclodextrins prepared in an alkaline aqueous solution

In order to establish the tosylated positions of α- and β-cyclodextrins, 13C-nmr spectra for the monotosyl-derivatives prepared in an alkaline aqueous solution were examined and determined to be in the 6-position of one glucose unit for β-cyclodextrin and to be in the C-2 position for α-cyclodextrin.