jo0c00743_si_001.pdf (1.26 MB)
Download fileSynthesis of a Pseudodisaccharide Suitable for Synthesis of Ring I Modified 4,5-2-Deoxystreptamine Type Aminoglycoside Antibiotics
journal contribution
posted on 2020-05-08, 20:07 authored by Amr Sonousi, Andrea Vasella, David CrichTo facilitate the synthesis of paromomycin
and/or neomycin analogues,
we describe a cleavage of ring I from paromomycin that proceeds in
the presence of azides and affords a glycosyl acceptor for the installation
of a modified ring I. A paromomycin 4′,6′-diol is oxidized
by the Dess–Martin periodinane followed by m-chloroperoxybenzoic acid. Base treatment then affords a protected
pseudodisaccharide, which functions as a glycosyl acceptor. The method
should also apply to the cleavage of pyranosyl 4,6-diols from oligosaccharides
and glycoconjugates.