摘要:
The present invention relates to the transformation of food-grade sugars containing D-fructose, in caramels enriched in oligosaccharides with prebiotic activity by using solid acid catalysts, such as zeolites, clays or ion-exchange resins in its acid form, under heterogeneous conditions, or by using soluble acid polymer catalysts of high molecular weight, under homogeneous conditions, with the possibility of recycling the catalyst, being compatible with discontinuous or continuous production processes. The resulting caramel exhibits prebiotic properties, favoring the development of a beneficial intestinal flora and a repairing effect in the damaged colon.
摘要:
Mono- and di-derivatives of cyclodextrins are completely defined, also a method for their synthesis and purification, functionalised cyclodextrins obtained from these derivatives, and the synthesis of supports comprising these cyclodextrin derivatives. Use of the supports for the preparation of separation of enantiomers, for asymmetric synthesis, for catalysis, for the preparation or separation of geometrical isomers or positional isomers, or for the preparation or separation of organic molecules with a hydrophobic nature is also described.
摘要:
The invention relates to novel p-tert butylcalix[6]arenes of formulae (IA) and (IB) with carboxylic or hydroxyamino triacidic functions in positions 2, 4 and 6, and other functions in positions 1, 3 and 5, supported liquid membranes and support materials comprising the above and the uses thereof.
摘要:
This invention relates to optically active support materials which include one or more esters and/or one or more carbamates and/or one or more mixed ester and carbamate compounds of polysaccharide or oligosaccharide, and an organic and/or inorganic substrate.
摘要:
The invention relates to ureido or carbamate derivatives of crown ethers and of silicon of formula: These derivatives can be grafted to silica gel for the purpose of obtaining supports for the chromatographic separation of cations or of molecules comprising amine functional groups, such as amino acids.
摘要:
A process for producing substantially optically pure sertraline utilizes chromatographic separation on a solid stationary chiral phase of spherical clay particles having an interlayer containing an optically pure metal-organic complex, and a liquid mobile phase preferably containing at least methyl acetate. The liquid mobile phase is preferably free of acetonitrile. The process is operable at temperatures above 40° C.
摘要:
There are described chloro-, hydroxy- and alkoxysilane derivatives of polysaccharides or oligosaccharides as novel compounds which are polymerizable and cross-linkable, and a method for obtaining them; novel support materials obtained from said derivatives and containing said silane derivatives of polysaccharides or oligosaccharides chemically grafted by a covalent bond with the support and polymerized and cross-linked in a three-dimensional network and a method for obtaining them; as well as the use of said material supports in separation or in preparation of enantiomers, through employment in gaseous, liquid or supercritical chromatography, by electrophoresis, electrochromatography or by percolation processes through membranes containing said support materials.