Novel method for the synthesis of a trisaccharide

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.

Synthesis of 2'-o-fucosyllactose

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.

Synthesis of 2'-o-fucosyllactose

Polymorphs of 2'-o-fucosyllactose and producing thereof

Glycoproteins and glycosylated cells and a method for the preparation of the same

The present application discloses novel glycoproteins and a related glycosylcarbamoylation methodology suitable for the preparation of glycopeptides (in particular glycoproteins and glycosylated cells), as well as the use of such glycoproteins in medicine, e.g. as pharmaceuticals and diagnostics or in diagnostic kits. The method for the preparation of a carbohydrate-peptide conjugate comprises reacting a cyclic carbamate (1) (wherein R3 and R4 are hydroxyl, acetamido, or a carbohydrate moiety; and R5 is hydrogen, methyl, hydroxymethyl, acetamidomethyl, carboxyl, or X-(CH2)r-, wherein X is a carbohydrate moiety and r is an integer selected from 0, 1, 2 and 3) with a peptide comprising at least one primary amino group.

Process for the preparation of glycosides

Preparation of glycosides comprises reacting an O-protected halide of a simple or a polysugar (I) with an unsaturated alcohol (II) having the structural element C=C(OH) in a biphasic solvent mixture and in the presence of a phase transfer catalyst and optionally deprotecting the protected glycoside.

Derivatization of oligosaccharides

The invention relates to a method for purifying, separating and/or isolating an oligosaccharide of general formula 1 or a salt thereof (general formula 1) wherein R 1 is fucosyl or H, R 2 is fucosyl or H, R 3 is selected from H, sialyl, N-acetyl-lactosaminyl and lacto-N-biosyl groups, wherein the N-acetyl lactosaminyl group may carry a glycosyl residue comprising one or more N-acetyl-lactosaminyl and/or one or more lacto-N-biosyl groups; each of the N-acetyl-lactosaminyl and lacto-N-biosyl groups can be substituted with one or more sialyl and/or fucosyl residue, R 4 is selected from H, or sialyl and N-acetyl-lactosaminyl groups optionally substituted with a glycosyl residue comprising one or more N-acetyl-lactosaminyl and/or one or more lacto-N-biosyl groups; each of the N-acetyl-lactosaminyl and lacto-N-biosyl groups can be substituted with one or more sialyl and/or fucosyl residue, wherein at least one of the R 1 , R 2 , R 3 or R 4 groups differs from H, comprising the steps: a) one or more compounds of general formula 1 is/are subjected to an anomeric O-alkylation reaction in the presence of R-X to yield a mixture comprising one or more compounds of general formula 2 or salts thereof (general formula 2) wherein X is a leaving group such as halogen, alkyl- or arylsulfonyloxy, R is a group removable by hydrogenolysis, and R 1 , R 2 , R 3 and R 4 are as defined above, and wherein at least one of the R 1 , R 2 , R 3 or R 4 groups differs from H, b) the mixture comprising one or more compounds of general formula 2 obtained in step a) is subjected to chromatography and/or crystallization to give one or more individual compounds of general formula 2 each in substantially pure form, c) an individual compound of general formula 2 in substantially pure form obtained in step b) is subjected to catalytic hydrogenolysis to yield a compound of general formula 1.

Synthesis of new sialooligosaccharide derivatives

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.

Production of 6'-o-sialyllactose and intermediates

Synthesis of new sialooligosaccharide derivatives

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

Method for crystallization of fucose

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.

Novel lactosamine derivatives

Lactosamine derivatives and related methods suitable for the preparation, including large-scale production, of N-acetyllactosamine, lactosamine, numerous lactosamine salts and a number of lactosamine-containing oligosaccharides are provided.

Novel lactosamine derivatives

Lactosamine derivatives and related methods suitable for the preparation, including large-scale production, of N-acetyllactosamine, lactosamine, numerous lactosamine salts and a number of lactosamine-containing oligosaccharides are provided.

Novel lactosamine derivatives

Lactosamine derivatives and related methods suitable for the preparation, including large-scale production, of N-acetyllactosamine, lactosamine, numerous lactosamine salts and a number of lactosamine-containing oligosaccharides are provided.

Novel Lactosamine Derivatives

The present invention provides novel lactosamine derivatives and related methods suitable for the preparation, including large-scale production, of N-acetyllactosamine, lactosamine, numerous lactosamine salts and a number of lactosamine-containing oligosaccharides. Preferred compounds are: (I) wherein R 1 is selected from the group consisting of optionally substituted acyl and optionally substituted alkyloxy-carbonyl; R 2 is selected from the group consisting of optionally substituted benzyl, optionally substituted benzhydryl, optionally substituted trityl, and optionally substituted naphthylmethyl (or R 2 is hydrogen in the formula to the left); R 3 is selected from the group consisting of optionally substituted C 1-5 -alkyl, optionally substituted heteroalkyl, optionally substituted heterocyclyl, optionally substituted aryl, optionally substituted C 2-6 -acyl, and hydrogen; and Q 1 and Q 2 are independently selected from the group consisting of electron withdrawing substituents.

Novel lactosamine derivatives

The present invention provides novel lactosamine derivatives and related methods suitable for the preparation, including large-scale production, of N-acetyllactosamine, lactosamine, numerous lactosamine salts and a number of lactosamine-containing oligosaccharides. Preferred compounds are: (I) wherein R1 is selected from the group consisting of optionally substituted acyl and optionally substituted alkyloxy-carbonyl; R2 is selected from the group consisting of optionally substituted benzyl, optionally substituted benzhydryl, optionally substituted trityl, and optionally substituted naphthylmethyl (or R2 is hydrogen in the formula to the left); R3 is selected from the group consisting of optionally substituted C1-5-alkyl, optionally substituted heteroalkyl, optionally substituted heterocyclyl, optionally substituted aryl, optionally substituted C2-6-acyl, and hydrogen; and Q1 and Q2are independently selected from the group consisting of electron withdrawing substituents.

Novel lactosamine derivatives

Lactosamine derivatives and related methods suitable for the preparation, including large-scale production, of N-acetyllactosamine, lactosamine, numerous lactosamine salts and a number of lactosamine-containing oligosaccharides are provided.

Novel lactosamine derivatives

The present invention provides novel lactosamine derivatives and related methods suitable for the preparation, including large-scale production, of N-acetyllactosamine, lactosamine, numerous lactosamine salts and a number of lactosamine-containing oligosaccharides. Preferred compounds are: (I) wherein R1 is selected from the group consisting of optionally substituted acyl and optionally substituted alkyloxy-carbonyl; R2 is selected from the group consisting of optionally substituted benzyl, optionally substituted benzhydryl, optionally substituted trityl, and optionally substituted naphthylmethyl (or R2 is hydrogen in the formula to the left); R3 is selected from the group consisting of optionally substituted C1-5-alkyl, optionally substituted heteroalkyl, optionally substituted heterocyclyl, optionally substituted aryl, optionally substituted C2-6-acyl, and hydrogen; and Q1 and Q2 are independently selected from the group consisting of electron withdrawing substituents.

Method for crystallization of fucose

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.