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Molecular Modeling of Saccharides, Part XXVI.

The 2,3-Anhydro-α-Cyclomannin - 1-Propanol Hexahydrate: Topography, Lipophilicity Pattern, and Solid-state Architecture

S. Immel, F. W. Lichtenthaler, H. J. Lindner, K. Fujita, M. Fukudome, and Y. Nogami

Tetrahedron: Asymmetry 2000, 11, 27-36.

As evidenced by its X-ray structural analysis, 2,3-anhydro-α-cyclomannin, a cyclooligosaccharide consisting of six α-(1→4)-linked 2,3-anhydro-D-mannopyranose units, readily incorporates 1-propanol into its cavity such that hydrophobic and hydrophilic surface regions of guest and host match at their interfaces. Together with water, the macrocycle and its guest assemble into a unique solid-state architecture, featuring layers of head-to-head dimers of the macrocycle with its guest, separated by equally distinct layers of water molecules, which are engaged in an intense hydrogen bonding network with the 6-CH2OH and the propanol-OH groups. The overall guest-host topography is thus reverse to that of the respective ethanol inclusion complex.

Additional Graphics: Anhydro Cyclodextrins

© Copyright PD Dr. S. Immel