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- W2082158937 abstract "The distribution of substituents in sulfonylbutylethers of cyclomaltoheptaose (beta-cyclodextrin) formed in aqueous medium has been determined by gas chromatography after hydrolysis and formation of the permethylated sulfonylfluoride derivatives. In contrast to other etherification reactions of beta-cyclodextrin, preferred substitution in position 3 of the glucose units has been detected. From 1H NMR and microcalorimetric experiments, the formation of host-guest complexes by beta-cyclodextrin and the reagent 1,4-butane sultone in water became evident. This spatial preorganization presumably favors the reaction with the O-3. In contrast, in methyl sulfoxide preferred 2-O-alkylation was obtained, indicating that host-guest interaction does not influence regioselectivity in this solvent." @default.
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- W2082158937 date "2000-07-01" @default.
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- W2082158937 title "Formation of unexpected substitution patterns in sulfonylbutylation of cyclomaltoheptaose promoted by host–guest interaction" @default.
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- W2082158937 doi "https://doi.org/10.1016/s0008-6215(00)00057-4" @default.
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