摘要:
The invention relates to a synthetic oligosaccharide representing part of the repeating unit of the Clostridium difficile glycopolymer PS-I and having the sequence of the pentasaccharide ±-L-Rha p -(1†’3)-²-D-Glc p -(1†’4)-[±-L-Rha p -(1†’3)]-±-D-Glc p -(1†’2)-±-D-Glc p or a synthetic fragment or derivative thereof. Preferably, the claimed synthetic oligosaccharide bears at least one linker L for conjugation to a carrier protein or for immobilization on a surface. Further aspects of the invention relate to advantageous methods for synthesizing said synthetic oligosaccharide and oligosaccharide-protein conjugate as well as to uses thereof, in particular as vaccines and diagnostic tools. A preferred method for synthesizing the pentasaccharide is shown below.
摘要:
Described herein are oral care compositions comprising a deoxy sugar antimetabolite and methods of inhibiting microbial biofilm formation and/or degrading a microbial biofilm in a subject.
摘要:
1-α-halo-2,2-difluoro-2-deoxy-D-ribofuranose derivative of formula (I) having the 3-hydroxy group protected with a biphenylcarbonyl group is a solid which can be easily purified by a simple procedure such as recrystallization, and therefore, it can be advantageously used as an intermediate in the preparation of gemcitabine in a large scale. Further, the 1-α-halo-2,2-difluoro-2-deoxy-D-ribofuranose derivative of formula (I) can be prepared with high stereoselectivity using the compound of formula (V) as an intermediate.
摘要:
[PROBLEMS] To find out a specific rare sugar having effects of inhibiting the proliferation of vascular endothelial cells and lumen formation and utilize these effects. To provide this rare sugar as a preventive/remedy for diseases with angiogenesis, a cosmetic or a functional food. [MEANS FOR SOLVING PROBLEMS] A method of controlling the proliferation of vascular endothelial cells characterized by utilizing the vascular endothelial cell proliferation-controlling effect of D-mannose, D-allose, 2-deoxy-D-glucose, 3-deoxy-D-glucose, L-sorbose, 2-deoxy-D-ribose and/or 2-deoxy-L-ribose. A method of inhibiting lumen formation of vascular endothelial cells characterized by utilizing the vascular endothelial cell lumen formation-inhibiting effect of D-allose, D-altrose, D-gulose, D-talose, L-allose, 2-deoxy-D-glucose, 3-deoxy-D-glucose, D-ribose, L-ribose, 2-deoxy-D-ribose and/or 2-deoxy-L-ribose.
摘要:
An immuno-suppressive agent containing, as an effective component, an enopyranose derivative of the following formula (I) or its salt: wherein R 1 is a hydrogen atom, alkyl which may be substituted, alkenyl, alkynyl, -OSO 2 R 7 , a halogen atom, -OCOR 7 , -NHCOR 8 , alkoxy, phenyl which may be substituted or a saccharose residue, R 2 is a hydrogen atom or alkyl, R 3 is a hydrogen atom or a halogen atom, R 4 is a hydrogen atom, -COR 9 , silyl which may be substituted or alkyl which may be substituted, one of R 5 and R 6 is hydroxyl, alkoxy which may be substituted, a saccharose residue, cycloalkyloxy which may be substituted or -OCOR 10 and the other is a hydrogen atom or alkyl which may be substituted, or R 4 and R 5 together form a single bond, while R 6 is a hydrogen atom or alkyl which may be substituted, each of R 7 , R 9 and R 10 is alkyl or phenyl which may be substituted, R 8 is alkyl, phenyl which may be substituted or benzyloxy, X is a hydrogen atom, alkyl which may be substituted, alkenyl which may be substituted, alkynyl which may be substituted, cycloalkyl which may be substituted, phenyl which may be substituted, pyridyl which may be substituted, furanyl which may be substituted, thienyl which may be substituted, formyl, -COR 11 , -C(W 1 )W 2 R 11 or -SO 2 R 11 , R 11 is a chain hydrocarbon group which may be substituted, a monocyclic hydrocarbon group which may be substituted, a polycyclic hydrocarbon group which may be substituted, a monocyclic heterocycle group which may be substituted, or a polycyclic heterocycle group which may be substituted, W 1 is an oxygen atom or a sulfur atom, W 2 is an oxygen atom, a sulfur atom or -NH-, Y is a hydrogen atom, alkyl which may be substituted, alkenyl which may be substituted or alkynyl which may be substituted.
摘要:
Methods of producing glucosone which comprises enzymatically oxidizing glucose with glucose-2-oxidase in a first zone and separating the concomitantly produced hydrogen peroxide from said first zone through a semi-permeable membrane into a second zone, said membrane being permeable only to compounds of a molecular weight of less than about 100.
摘要:
Dérivés d'osides possédant des propriétés antigéniques, comprenant un motif galactopyranose, dans lequel le groupe hydroxyle en position 1 est substitué par une chaîne comprenant un groupe éther intercalaire et un groupement fonctionnel azoté en bout de chaîne. Ces osides sont notamment utiles pour préparer des immunoabsorbants.
摘要:
The invention relates to a synthetic oligosaccharide representing part of the repeating unit of the Clostridium difficile glycopolymer PS-I and having the sequence of the pentasaccharide ±-L-Rha p -(1†’3)-²-D-Glc p -(1†’4)-[±-L-Rha p -(1†’3)]-±-D-Glc p -(1†’2)-±-D-Glc p or a synthetic fragment or derivative thereof. Preferably, the claimed synthetic oligosaccharide bears at least one linker L for conjugation to a carrier protein or for immobilization on a surface. Further aspects of the invention relate to advantageous methods for synthesizing said synthetic oligosaccharide and oligosaccharide-protein conjugate as well as to uses thereof, in particular as vaccines and diagnostic tools. A preferred method for synthesizing the pentasaccharide is shown below.