Preparation of Di-O-triphenylmethyl-(trityl-)cyclomalto-octaoses, and Isolation and Characterization by "Hex-5-enose Degradation" of Four Positional Isomers.

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Abstract
Four regioisomeric ditritylated derivatives of cyclomalto-octaose (1, cG8), namely, 6(I),6(n)-di-O-trityl-cG8S have been prepared by the reaction of 1 with chlorotriphenylmethane in pyridine and isolated by high-performance liquid chromatography. The regiochemical determination of the four ditrityl-substituted derivatives has been achieved by means of the "hex-5-enose degradation," followed by examination of the products by fast-atom bombardment-mass spectrometry.

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