Selective Acylation of Nucleosides, Nucleotides, and Glycerol-3-phosphocholine in Water
作者:Matthew Powner、Christian Fernández-García
DOI:10.1055/s-0036-1588626
日期:——
2′,3′,5′-tri-O-acetyl-nucleosides in water has been developed. Furthermore, a long-chain selective glycerol-3-phosphocholine diacylation is elucidated. These reactions are environmentally benign, rapid, high yielding, and the products are readily purified. Importantly, this reaction may indicate a prebiotically plausible reaction pathway for the selective acylation of key metabolites to facilitate their
Sulfonyl Imidazolium Salts as Reagents for the Rapid and Efficient Synthesis of Nucleoside Polyphosphates and Their Conjugates
作者:Samy Mohamady、Ahmed Desoky、Scott D. Taylor
DOI:10.1021/ol203178k
日期:2012.1.6
A procedure for the synthesis of nucleosidepolyphosphates and their conjugates using sulfonylimidazolium salts as key reagents is described. The procedure is rapid and high yielding, does not require prior protection and subsequent deprotection of the donors or acceptors, and can be used to activate nucleoside mono-, di- and triphosphates, and a wide variety of acceptors and donors can be used.
Kanosamine Biosynthesis: A Likely Source of the Aminoshikimate Pathway's Nitrogen Atom
作者:Jiantao Guo、J. W. Frost
DOI:10.1021/ja026628m
日期:2002.9.1
cell-free lysate of glutamine and NAD with UDP-glucose resulted in the formation of kanosamine. The bioconversion of UDP-glucose into kanosamine along with the bioconversion of kanosamine 6-phosphate into 4-amino-3,4-dideoxy-D-arabino-heptulosonic acid 7-phosphate and 3-amino-5-hydroxybenzoic acid suggests that kanosamine biosynthesis is the source of the aminoshikimate pathway's nitrogen atom.
Two non-natural fluorinated 2-N-acetamidosugar nucleotides, uridine 5'-diphosphate (UDP) 2-acetamido-2,4-dideoxy-4-fluoro-alpha-D-glucopyranose (UDP-4-FGlcNAc) 1 and its galacto isomer (UDP-4-FGalNAc) 2, were enzymatically constructed by treating chemically synthesized fluorinated 2-N-acetamidosugar 1-phosphates as the donor with UDP 2-acetamido-2-deoxy-alpha-D-glucopyranose pyrophosphorylase in the