摘要:
The present application discloses a method for the crystallization of fucose, characterized in that the crystallization is carried out from a mixture comprising fucose and at least one 6-deoxy sugar selected from 6-deoxy-talose and 6-deoxy-gulose. In one embodiment, the mixture comprises fucose and 6-deoxy-talose.
摘要:
The present invention relates to an improved synthesis of a trisaccharide of the formula, novel intermediates used in the synthesis and the preparation of the intermediates.
摘要:
The present invention relates to novel polymorphs of the trisaccharide 2′-O-fucosyllactose (2-FL) of formula (1), methods for producing said polymorphs and their use in pharmaceutical or nutritional compositions.
摘要:
A compound of the formula (I) wherein R 1 is a group removable by hydrogenolysis,and wherein R 2 is OH or R 2 is -NHR 3 wherein R 3 is a group removable by hydrogenolysis. The compound can be made from fructose by a Heyns-rearrangement. The compound can be used then to make - free D-mannosamine or its salts, - D-mannosamine building blocks and mannosamine containing oligo- or polysaccharides, - N-acetyl-D-mannosamine and its hydrates and solvates, - neuraminic acid derivatives and, - viral neuraminidase inhibitors.
摘要:
The invention relates to a method for the synthesis of compounds of general formula (1A) and salts thereof wherein one of the R groups is an α-sialyl moiety and the other is H, X 1 represents a carbohydrate linker,A is a D-glucopyranosyl unit optionally substituted with fucosyl, R 1 is a protecting group that is removable by hydrogenolysis, the integer m is 0 or 1, by a transsialidation reaction.
摘要:
The present invention relates to a method for preparation of the trisaccharide 6'-0-sialyllactose (formula (I)) or salts thereof as well as intermediates in the synthesis and for the use of 6'-0-sialyllactose salts in pharmaceutical or nutritional compositions.
摘要:
Method of making NANA from NAM, which may itself be made from fructose. The NAM is treated with pyruvic acid or a pyruvate in the presence of a NANA aldolase having at least 70 % sequence similarity or homology to the amino acid sequence of SEQ. ID. NO. 1.
摘要:
The present invention provides: in a first aspect, a method for the preparation of L-fucose, wherein L-fucose precursors are produced from pectin and L-fucose is produced from the L-fucose precursors; in a second aspect, a method for the preparation of L-fucose from D-galacturonic acid or a salt thereof, wherein L-fucose precursors are produced from D-galacturonic acid or a salt thereof, and L-fucose is produced from the L-fucose precursors; and an L-fucose precursoras shown in Formula A below, wherein R is a linear or branched chain saturated hydrocarbon group with 1-6 carbon atoms, such as methyl, ethyl, n -propyl, i -propyl, n -butyl, i -butyl, s -butyl, t -butyl, n -hexyl, etc., preferably a methyl group.