Chemoenzymatic Synthesis of a Trisaccharide–Serine Conjugate, Gal(β1-3)Gal(β1-4)Xyl(β1-O)–L-Ser, Use of Galactosyl Fluoride as a Donor for Transglycosylation
[EN] METHODS FOR GLYCOSYLATION<br/>[FR] PROCÉDÉS DE GLYCOSYLATION
申请人:UNIV MICHIGAN REGENTS
公开号:WO2020232194A1
公开(公告)日:2020-11-19
Provided herein are methods of glycosylation in the formation of disaccharides, trisaccharides, and oligosaccharides using fluoroglycosides, silyl ether glycosides and a triaryl borane catalyst.
Streamlined Iterative Assembly of Thio‐Oligosaccharides by Aqueous
<i>S</i>
‐Glycosylation of Diverse Deoxythio Sugars
作者:Peng Wen、Peijing Jia、Qiuhua Fan、Bethany J. McCarty、Weiping Tang
DOI:10.1002/cssc.202102483
日期:2022.2.8
Step by step: A streamlined practical iterative synthesis of S-oligosaccharides is developed in aqueous solution without the need of protecting any of the hydroxy groups. Various deoxythio sugar building blocks can be prepared efficiently. The Ca(OH)2-promoted aqueous S-glycosylation can be realized with high chemo- and stereoselectivity.
Verfahren zur Herstellung von Glycosiden mit Glycosidasen aus Ciliaten
申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0725144A1
公开(公告)日:1996-08-07
Die Erfindung betrifft ein Verfahren zur Herstellung von Glycosiden durch enzymatische Glycosylierung mittels α- und β-Glycosidasen aus holotrichen Ciliaten und im besonderen aus Hymenostomatida.
Glycosidasen aus holotrichen Ciliaten eignen sich sehr gut zur enzymatischen Synthese von Alkylglycosiden, Glycopeptiden, Di- bzw. Oligosacchariden. Bevorzugte Glycosyldoren sind Nitrophenylglycoside, Glycosylfluoride oder Disaccharide, bevorzugte Akzeptoren sind kurzkettige Alkohole, Polyhydroxyverbindungen, insbesondere Monosaccharide, oder geschützte Hydroxyaminosäuren oder entsprechende Peptide.
Micheel et al., Chemische Berichte, 1955, vol. 88, p. 475,479
作者:Micheel et al.
DOI:——
日期:——
The efficient enzymatic synthesis of N-acetyllactosamine in an organic co-solvent
作者:Jung Hae Yoon、Joon Shick Rhee
DOI:10.1016/s0008-6215(00)00063-x
日期:2000.8
In the presence of beta-galactosidase from Bifidobacterium bifidum, N-acetyllactosamine was synthesized in significantly enhanced yield compared with earlier routes. Different proportions of the (1-->4)- and (1-->6)-linked forms were obtained depending on the choice of enzyme and reaction conditions, viz. the nature of added organic co-solvent (20-80% of 2-ethoxy ethyl ether, trimethyl phosphate, or acetone). The beta-(1 --> 4)-linked disaccharide was the major product and the beta-(1-->6)-linked disaccharide was the minor product. With beta-galactosidases from P. multicolor, A. oryzae, B. longum the beta-(1 --> 6) linkage was exclusively synthesized. Procedures for optimising the yield of N-acetyllactosamine are discussed. An immobilized enzyme on a nylon powder column was used for the efficient recycling of enzyme and synthesizing the disaccharide. (C) 2000 Elsevier Science Ltd. All rights reserved.