Abstract: The invention relates to a compound corresponding to general formula (I) wherein n is a whole number from 1-6, m is a whole number equal to 5, 6 or 7, R1 is an OH group, all R1 s are identical, Z is an NHX group, X is a hydrogen atom, and R is a hydrogen atom or a bioidentification element, with the proviso that the compound wherein n=1, m=6, Z=NH2 and R1=OH is excluded.

Abstract: The invention relates to a compound according to the following general formula (I), in which: m represents an integer equal to 5, 6 or 7; n and n1 represent an integer from 1 to 5; the A groups represent, in particular, a hydrogenated atom; X represents O or S; Y represents, in particular, a group NR1, R1, representing, in particular, a hydrogenated atom; W represents CH or N; and Z represents, in particular, a hydrogenated atom.

Abstract: The present invention relates to cyclodextrins having the following formula (I): to nanostructures comprising them, to processes for preparing them, to the use thereof, and also to compositions comprising them.

Abstract: The invention relates to a cyclodextrin derivative corresponding to general formula (I) wherein n is a whole number from 1-6, m is a whole number equal to 5, 6 or 7, R1 is an OH group, all R1s are identical, Z is a thiourea group, X is a hydrogen atom, and R is a hydrogen atom or a bioidentification element.

Abstract: The invention relates to a compound corresponding to general formula (I) wherein n is a whole number from 1-6, m is a whole number equal to 5, 6 or 7, R1 is an OH group, all R1 s are identical, Z is an NHX group, X is a hydrogen atom, and R is a hydrogen atom or a bioidentification element, with the proviso that the compound wherein n=1, m=6, Z=NH2 and R1=OH is excluded.

Abstract: The invention relates to a compound corresponding to general formula (I) wherein n is a whole number from 1-6, m is a whole number equal to 5, 6 or 7, R1 is an OH group, all R1s are identical, Z is an NHX group, X is a hydrogen atom, and R is a hydrogen atom or a bioidentification element, with the proviso that the compound wherein n=1, m=6, Z=NH2 and R1=OH is excluded.

Abstract: The invention relates to a compound according to the following general formula (I), in which: m represents an integer equal to 5, 6 or 7; n and n1 represent an integer from 1 to 5; the A groups represent, in particular, a hydrogenated atom; X represents O or S; Y represents, in particular, a group NR1, R1, representing, in particular, a hydrogenated atom; W represents CH or N; and Z represents, in particular, a hydrogenated atom.

Abstract: The invention relates to a highly regioselective method for preparing a derivative of cyclodextrin, &bgr;-cyclodextrin in particular, monosulfonylated at C-6, in which said cyclodextrin is caused to react with a sulfonylation agent, in an alkaline aqueous solution, in the presence of a metal salt able to form a co-ordination complex with the secondary hydroxyl groups of the cyclodextrin, and after the reaction said cyclodextrin derivative monosulfonylated at C-6 is recovered from the reaction mixture. The monosulfonylated derivatives of cyclodextrins find particular application as starting material for access to monofunctionalized derivatives of cyclodextrins.

Abstract: The invention relates to thioureido-cyclodextrins, usable in particular to solubilize anti-tumor and antiparasitic agents and their preparation processes.These thioureido-cyclodextrins correspond to the formula: ##STR1## with m=6, 7 or 8, R.sup.1 represents OH or NH--CS--NHR.sup.2, at least one of the R.sup.1 being NH--CS--NHR.sup.2,R.sup.2 represents an alkyl, monosaccharide, oligosaccharide glycosyl-amino acid or glycopeptide group.These cyclodextrins are usable for solubilizing anti-tumor or antiparasitic agents of the Taxol family.

Abstract: The invention relates to the use of natural cyclodextrins and their derivatives for the solubilization of platelet anti-aggregating agents from the family of Ginkgolides.The cyclodextrins used comply with the formula: ##STR1## in which n is equal to 6, 7 or 8 and the R.sup.1, which can be the same or different, represent OH or SR.sup.2 with R.sup.2 representing a group derived from a monosaccharide or an oligosaccharide.The Ginkgolide is preferably Ginkgolide B.

Abstract: An amphoteric starch containing carboxyl and cationic groups characterized in that its carboxyl groups originate from the selective oxidation of the hemiacetal groups of the cationic starch and possibly of the hemiacetal groups of its products of acid hydrolysis. The process for producing the amphoteric starch consists in reacting a cationic starch in aqueous solution with hydrogen peroxide and hydrobromic acid or bromine, so as to oxidize selectively the hemiacetal groups of the cationic starch and, where appropriate, the hemiacetal groups of its products of acid hydrolysis, to give carboxyl groups.

Abstract: This process consists in reacting a cationic starch in aqueous solution with hydrogen peroxide and hydrobromic acid or bromine, so as to oxidize selectively the hemiacetal groups of the cationic starch and, where appropriate, the hemiacetal groups of its products of acid hydrolysis, to give carboxyl groups. The amphoteric starch containing carboxyl and cationic groups, thus obtained, is characterized in that its carboxyl groups originate from the selective oxidation of the hemiacetal groups of the cationic starch and possibly of the hemiacetal groups of its products of acid hydrolysis.

Abstract: A process for preparing alkykl-1-thio-.alpha.,.beta.-glycosides and alkyl glycosides is described. The glycosides are prepared from a saccharide selected from monosaccharides and reducible di- and oligo-saccharides. The saccharide is reacted with either a thiol to produce an alkyl-1-thio-.alpha.,.beta.-glycoside or an alcohol to produce an alkyl glycoside in the presence of the solvent and reagent poly-(hydrogen fluoride)-pyridinium. Novel alkyl-1-thio-.alpha.,.beta.-glycosides prepared by the process of the invention are characterized in that they are in the form of a mixture of .alpha. and .beta. anomers. The alkyl-1-thio-.alpha.,.beta.-glycosides having a long alkyl chain are useful as nonionic detergents, in particular in the extraction of membrane proteins.

Abstract: The invention concerns a process for dehydrating glucides and applicable to those glucides of which the molecule includes at least one ketose type group, being characterized in that the glucide is made to react without addition of water with a hydrogen halide, whereupon the hydrogen halide is eliminated by evaporation in order to collect the formed disaccharide anhydride.The invention also relates to novel products characterized by essentially consisting of saccharide anhydrides of which the molecule includes two saccharide cycles linked to each other by two acetal bonds included in a dioxane cycle. As a rule at least one of the saccharide cycles is that of fructose (and may be substituted), and this cycle is linked by a spirane bond to the dioxane cycle.Product application as food additives.

Abstract: The process comprises the action of a saturated aliphatic or cycloaliphatic alcohol or an aliphatic or cycloaliphatic alcohol comprising a double ethylenic bound not situated in alpha of the hydroxyl group with an aldose, aldoside or polyaldoside in the solvent and reactant formed by the hydrogen fluoride. Application to the synthesis of surfactants or as additives for rigidifying polyurethane foams.

Abstract: The invention concerns a process for dehydrating glucides and applicable to those glucides of which the molecule includes at least one ketose type group, being characterized in that the glucide is made to react without addition of water with a hydrogen halide, whereupon the hydrogen halide is eliminated by evaporation in order to collect the formed disaccharide anhydride.The invention also relates to novel products characterized by essentially consisting of saccharide anhydrides of which the molecule includes two saccharide cycles linked to each other by two acetal bonds included in a dioxane cycle. As a rule at least one of the saccharide cycles is that of fructose (and may be substituted), and this cycle is linked by a spirane bond to the dioxane cycle.Product application as food additives.