Synthesis of oligosaccharides by using levulinic ester as an hydroxyl protecting group
作者:H.J. Koeners、J. Verhoeven、J.H. van Boom
DOI:10.1016/s0040-4039(01)85479-4
日期:1980.1
The fast, selective and mild removal of levulinyl groups with hydrazine from galactose, which also carries hydroxyl functions protected with acetyl groups, enables, under Koenigs-Knorr conditions, the synthesis of a trimer containing β-linked galactoses.
Chromic acid oxidation in the synthesis of uronic acids. Use of the O-levulinoyl group to minimize acyl migration
作者:Rabindra N. Rej、John N. Glushka、Warren Chew、Arthur S. Perlin
DOI:10.1016/0008-6215(89)84092-3
日期:1989.6
include levulinoyl at O-5 of acylic and furanose derivatives, and both eq and ax O-4 of pyranose derivatives. It is also shown that, because of the acidity of the Jones reagent, use of the O -levulinoyl group, in combination with a primary p -anisyldiphenylmethyl substituent, permits sequential rapid hydrolysis of the latter and oxidation of the newly exposed alcohol group, which favors high overall yields
Chemical Synthesis of the Galacturonic Acid Containing Pentasaccharide Antigen of the O-Specific Polysaccharide of <i>Vibrio cholerae</i> O139 and Its Five Fragments
作者:Xiaowei Lu、Pavol Kováč
DOI:10.1021/acs.joc.6b01019
日期:2016.8.5
Three pentasaccharides, two tetrasaccharides, and a trisaccharide fragment of the O-specific antigen of Vibrio cholerae O139 were synthesized by applying 1 + 1, 2 + 1, 3 + 1, and 4 + 1 coupling strategies. The most challenging tasks involved were the synthesis of the 1,2-cis-glycosidic linkage between galactose and the linker (spacer) molecule and final purification of the target multicharged substances
An imaging agent comprising a conjugate of an oligosaccharide moiety with an imaging moiety. The oligosaccharide is Lewis A or Lewis B or a mimetic thereof, or a pharmaceutically acceptable salt or PEGylated form of Lewis A or Lewis B or its mimetics. Lewis A and Lewis B and its mimetics are also provided for use in the therapeutic treatment of inflammatory diseases, autoimmune diseases and cancer.
An imaging agent comprising a conjugate of an oligosaccharide moiety with an imaging moiety. The oligosaccharide is Lewis A or Lewis B or a mimetic thereof, or a pharmaceutically acceptable salt or PEGylated form of Lewis A or Lewis B or its mimetics. Lewis A and Lewis B and its mimetics are also provided for use in the therapeutic treatment of inflammatory diseases, autoimmune diseases and cancer.
一种成像剂,包含寡糖分子与成像分子的共轭物。寡糖是路易斯 A 或路易斯 B 或其模拟物,或路易斯 A 或路易斯 B 或其模拟物的药学上可接受的盐或 PEG 化形式。Lewis A 和 Lewis B 及其模拟物还可用于炎症性疾病、自身免疫性疾病和癌症的治疗。