If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Iterative One‐Pot α‐Glycosylation Strategy: Application to Oligosaccharide Synthesis

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

Abstract

Based on the combined use of dimethylformamide (DMF) modulation and neighboring group participation, three iterative one‐pot α‐glycosylation methods, i.e., one‐pot (α,α)‐, one‐pot (β,α)‐, and one‐pot (α,β)‐glycosylations, were developed. These methods are applicable to a range of thioglycosyl donors, confer stereocontrol in α‐/β‐glycosidic bond formation, and thus provide for rapid access to oligosaccharides with various permutations of anomeric configurations. The utility of these one‐pot glycosylation methods is demonstrated in the synthesis of eight non‐natural and natural oligosaccharide targets, including the core 1 serine conjugate, core 8 serine conjugate, the D‐Gal‐α(1→3)‐D‐Glc‐α(1→3)‐L‐Rha trisaccharide unit of the cell wall component in Streptococcus pneumoniae, and the D‐Glc‐α(1→2)‐D‐Glc‐α(1→3)‐D‐Glc trisaccharide terminus of the N‐linked glycan precursor. Confirmation of the anomeric configurations of these oligosaccharides is evidenced by 1H, 13C, 13C‐non‐proton decoupling, and heteronuclear correlation 2D NMR experiments. Global deprotection of selected oligosaccharide targets is illustrated.

Document Type: Research Article

DOI: http://dx.doi.org/10.1002/adsc.201200396

Affiliations: Applied Chemistry Department, Science Building II, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu, Taiwan 300, ROC, Fax: (+886)-3-572-3764

Publication date: November 26, 2012

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more