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Inclusion complexes of cyclomaltoheptaose (β-cyclodextrin) and its methylated derivatives with the main components of the pheromone of the olive fruit fly

✍ Scribed by Antigone Botsi; Konstantina Yannakopoulou; Eugene Hadjoudis

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
620 KB
Volume
241
Category
Article
ISSN
0008-6215

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✦ Synopsis

The inclusion complexes of cyclomaltoheptaose (beta CD) and heptakis(2,3,6-tri-O-methyl)cyclomaltoheptaose (TM-beta CD) with the four major components of the pheromone of the olive fruit fly (Dacus oleae), namely 1,7-dioxaspiro[5.5]undecane, (-)-alpha-pinene, nonanal, and ethyl dodecanoate, and the complex of heptakis(2,6-di-O-methyl)cyclomaltoheptaose (DM-beta CD) with 1,7-dioxaspiro[5.5]undecane were studied. The complexes were characterised in the solid state by differential scanning calorimetry and X-ray powder diffraction. In aqueous solution, the structure of the complexes was investigated by 1H NMR spectroscopy. In solution, 1,7-dioxaspiro[5.5]undecane, (-)-alpha-pinene, and nonanal enter the cavity of the cyclo-oligosaccharides. Association constants for some of these complexes were also measured. The complexes of ethyl dodecanoate did not provide evidence of their structure in solution. This was attributed to the existence of negligible amounts of these complexes in water due to the combined effects of low solubility and low association constant.

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