Synthesis of a New Class of N-Linked Lewis and LacNAc Analogues as Potential Inhibitors of Human Fucosyltransferases: A General Method for the Incorporation of an Iminocyclitol as a Transition-State Mimetic of the Donor Sugar to the Acceptor
1998; American Chemical Society; Volume: 63; Issue: 23 Linguagem: Inglês
10.1021/jo981245l
ISSN1520-6904
AutoresRalf Wischnat, Richard Martin, Chi‐Huey Wong,
Tópico(s)Peptidase Inhibition and Analysis
ResumoA short and effective synthesis of N-linked di- and trisaccharides is described. In a high-yielding reaction sequence, the glucosamine derivative 1 was transformed to the 3-azido-2,3-dideoxy sugar 2e under excellent stereocontrol. The LacNAc analogue 4d was synthesized as a single isomer in three steps starting from 2e. In a one-pot procedure, iminocyclitol 5 was transformed into aldehyde 6 and successfully used for reductive amination with 4c and 2f to give trisaccharide 8a and disaccharide 7a, respectively. This procedure represents a general strategy for the incorporation of an iminocyclitol as a transition-state mimic of the donor sugar moiety to the acceptor.
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