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Long‐range two‐dimensional 1 H– 29 Si heteronuclear shift correlation using gradients. Application to tetra‐TMS‐α‐ O ‐methyl‐ D ‐glucopyranose and tetra‐TES‐α‐ O ‐methyl‐ D ‐glucopyranose
Author(s) -
Provera Stefano,
Davalli Silvia,
Raza Giorgio H.,
Contini Stefania,
Marchioro Carla
Publication year - 2001
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/1097-458x(200101)39:1<38::aid-mrc794>3.0.co;2-7
Subject(s) - chemistry , tetra , heteronuclear molecule , d glucopyranose , stereochemistry , analytical chemistry (journal) , nuclear magnetic resonance spectroscopy , medicinal chemistry , organic chemistry
The gradient‐enhanced 1 H, 29 Si HMQC experiment was applied to tetra‐TMS‐α‐ O ‐methyl‐ D ‐glucopyranose and tetra‐TES‐α‐ O ‐methyl‐ D ‐glucopyranose as test samples. All the expected 2 J ( 1 H, 29 Si) and 3 J ( 1 H, 29 Si) cross peaks were observed, allowing the full 29 Si NMR assignment. An analysis of the trend of 29 Si chemical shifts depending on the position of the silylating group in the sugar ring and on the different hindrances of TMS and TES groups is also reported. Copyright © 2001 John Wiley & Sons, Ltd.