Synthesis of glycosyl amino acids by light-induced coupling of photoreactive amino acids with glycosylamines and 1-C-aminomethyl glycosides
作者:Ondrej Simo、Vincent P. Lee、Alexander S. Davis、Christian Kreutz、Paul H. Gross、Patrick R. Jones、Katja Michael
DOI:10.1016/j.carres.2004.12.023
日期:2005.3
The glycosylamines of O-acetyl-protected GlcNAc and chitobiose, as well as two partially unprotected 1-C-aminomethyl glucosides, were photochemically coupled with orthogonally protected N-aspartyl-5-bromo-7-nitroindoline derivatives. The reactions proceeded under neutral conditions by irradiation with near-UV light. The glycosyl asparagines with N- or C-glycosyl linkages were afforded in 60-85% yield
Phototransamidation as a Method for the Synthesis of<i>N</i>-Glycosyl Asparagines
作者:Kristóf Vízvárdi、Christian Kreutz、Alexander S. Davis、Vincent P. Lee、Benjamin J. Philmus、Ondrej Simo、Katja Michael
DOI:10.1246/cl.2003.348
日期:2003.4
N-Glycosyl asparagines were synthesized by a mild photochemical coupling method in which a photoreactive amide of an aspartic acid’s β-carboxyl group is condensed with an aminosaccharide. Upon excitation, the γ-carbon becomes susceptible to nucleophilic attack and the obtained N-glycosyl asparagines, which may be useful building blocks for the synthesis of N-glycopeptides and neoglycopeptides, are generated in good yields.