Complete Assignment of the 360 MHz1H NMR Spectra of Some Oligomannosides
作者:
Jean-Robert Brisson,
FrancoiseM. Winnik,
JiriJ. Krepinsky,
JeremyP. Carver,
期刊:
Journal of Carbohydrate Chemistry
(Taylor Available online 1983)
卷期:
Volume 2,
issue 1
页码: 41-55
ISSN:0732-8303
年代: 1983
DOI:10.1080/07328308308058808
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The 360 MHz1H NMR spectra of four closely related synthetic oligomannosides have been completely assigned. This was achieved by a combination of spin-tickling difference spectroscopy and spectral simulation. The compounds are: methyl 3-0-(α-D-mannopyranosyl)-α-D-mannopyranoside (II3), methyl 6-0-(α-D-mannopyranosyl) -α-D-mannopyranoside (II6), methyl 3,6-di-0-(α-D-mannopyranosyl) -α-D mannopyranoside (III) and methyl 3-0-(α-D-mannopyranosyl)-6-0-(3-0-α-D-manno-pyranosyl-α-D-mannopyranosyl)-α-D-mannopyranoside (IV). These oligomannosides are analogues of the high mannose structures occurring naturally in theN-linked glycopeptides of glycoproteins. A number of long range chemical shift perturbations were observed which are interpreted as being of methyl mannotrioside, methyl 3,6-di-0-(α-D-mannopyranosyl)-α-D-mannopyranoside (III); the related disaccharides, methyl 6-0-(α-D-mannopyranosyl)-α-D-mannopyranoside (II6) and methyl 3-0-(α-D-mannopyranosyl)-α-D-mannopyranoside (II3); and a tetrasaccharide, methyl 3-0
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