than the small clusters of sialosides with lower valency, due to multivalent effect and optimized three dimensional presentation of sialosides on the protein platform. The results of fluorescent NA inhibition assay showed that some of the conjugates have moderate NA inhibitory activity, in comparison to the monomer and low valent conjugates with weak or none inhibitory activity. These synthetic sialylated
Supported Synthesis of Adenosine Nucleotides and Derivatives on a Benzene‐Centered Tripodal Soluble Support
作者:Lucie Appy、Suzanne Peyrottes、Béatrice Roy
DOI:10.1002/ejoc.202100544
日期:2022.6.7
A new strategy based on anchoring C(6) azidopurine nucleoside derivative to a tripodal soluble support allows to access the corresponding adenosine nucleotides. We extended the scope of the method to methylene bisphosphonate analogues and N6-benzylamine derivative.
Efficient Synthesis of Muramic and Glucuronic Acid Glycodendrimers as Dengue Virus Antagonists
作者:Cecilia García‐Oliva、Alfredo H. Cabanillas、Almudena Perona、Pilar Hoyos、Ángel Rumbero、María J. Hernáiz
DOI:10.1002/chem.201903788
日期:2020.2.3
interactions, thus increasing their binding strengths to proteins. In this work, we report the efficient synthesis of novel muramic and glucuronic acid glycodendrimers as potential Dengue virus antagonists. Aromatic scaffolds functionalized with a terminal ethynyl groups were coupled to muramic and glucuronic acid azides by click chemistry through optimized synthetic strategies to afford the desired glycodendrimers
Cuprous oxide on charcoal-catalyzed ligand-free, synthesis of 1,4-disubstituted 1,2,3-triazoles via click chemistry
作者:Susana Rojas-Lima、Heraclio López-Ruiz、José Emilio de la Cerda-Pedro、Susana Rojas-Lima、Imelda Pérez-Pérez、Brianda Viridiana Rodríguez-Sánchez、Rosa Santillán、Oscar Coreño
DOI:10.3998/ark.5550190.0014.312
日期:——
Cuprous oxide on charcoal (Cu2O/C), the preparation of which is described for the first time, catalyzes the formation of 1,4-disubstituted 1,2,3-triazoles from organic azides and terminalalkynes in good to excellent yields (69-94%). These disubstituted triazoles can be equally efficiently generated in a one-pot process from alkyl bromides, sodiumazide, and terminal acetylenes in 50% aqueous isopropanol
based on N‐acetyl/glycolyl‐neuraminic acid incorporation. We assess the ensuing effect on their bioactivity for a plant toxin, and present an analysis of the noncovalent substrate binding contacts that the added sialic acid moiety makes to the lectin. Enzymatic diversification of a scaffold‐presented glycan can thus be brought to completion in situ, offering a versatile perspective for rational glycocluster