Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Alain Bouchu"'
Publikováno v:
Tetrahedron Letters. 48:4111-4114
Sucrose fatty acid esters, useful as mild surfactants, have been synthesised in good yields in a solvent-free medium. High contents of monoesters and low saponification rate have been observed. The co-melting of sucrose and a multivalent cation soap
Autor:
François Jérôme, Nicolas Villandier, Alain Bouchu, Ronan Pierre, Joël Barrault, Juliette Fitremann, Yves Queneau, Isabelle Adam
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 259:67-77
The direct etherification of three disaccharidic polyols, sucrose, trehalose and isomalt®, with 1,2-epoxydodecane was studied. The catalytic activity of various solid basic catalysts, differing by their superficial hydrophilic–lipophilic propertie
Autor:
Isabelle Adam, Joël Barrault, François Jérôme, Alain Bouchu, Gilles Courtois, Juliette Fitremann, Yves Queneau, Ronan Pierre
Publikováno v:
Comptes Rendus Chimie. 7:151-160
Sucrose etherification with the 1,2-epoxydodecane was investigated using various tertiary amines as catalysts. The reversible addition of the tertiary amine on the epoxide led to the formation of a strongly basic quaternary ammonium salt, responsible
Publikováno v:
Journal of Carbohydrate Chemistry. 22:657-669
The tendency of the acyl groups located on the glucose part of sucrose fatty acid esters to undergo intramolecular migrations in organic medium and the regioselectivity of some transesterifications of sucrose were investigated by HPLC, in situ NMR sp
Publikováno v:
The Journal of Organic Chemistry. 68:6672-6678
The base-catalyzed reaction of carboxymethyl 3,4,6-tri-O-acetyl-alpha-D-glucopyranoside 2-O-lactone (prepared from isomaltulose) with amino acids and fatty amines under basic catalysis gave a series of new pseudoglucopeptides, nonionic amphiphiles, a
Autor:
Jean-Paul Maitre, Marc Karaoglanian, Anne-Sophie Muller, Juliette Gagnaire, Yves Queneau, Alain Bouchu
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 203:55-66
The behaviour of various sucrose fatty acid esters blends in pseudoternary mixtures {water/methyl stearate/sucrose ester+propanol or ethanol} was explored. The qualitative and quantitative analysis of the phases gave information on the distribution o
Publikováno v:
Tetrahedron: Asymmetry. 12:2409-2419
Crude Proteinase N was used as catalyst for the synthesis of carbohydrate (in particular sucrose) esters by transesterification of activated esters in organic solvents. Polymerisable or amphiphilic sucrose esters (methacrylates and laurates) were obt
Publikováno v:
Scopus-Elsevier
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 172:125-138
The study of the heterogeneous reaction of sucrose with 1,2-epoxydodecane in water showed how the emulsification can change both the reaction rates, the yields and the distribution of the products, namely sucrose monoethers, sucrose diethers, polysub
Autor:
Gérard Descotes, Sandrine Lemoine, Yves Queneau, Alain Bouchu, Stéphane Trombotto, David Joannard, Cecile Thomazeau
Publikováno v:
Carbohydrate Research. 326:176-184
Oxidation of sucrose by the NaOCl/TEMPO system provided sucrose tricarboxylate without the addition of sodium bromide as co-catalyst when high-frequency (500 kHz) ultrasound was applied, in contrast to very limited conversion without sonication. In t