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An NMR study of the hydroxylamine‐induced denitration of nitrocellulose, nitroamylose and some model monosaccharide nitrate esters
Author(s) -
Bulusu S.,
Axenrod T.,
Liang B.,
Yuan L.
Publication year - 1991
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/mrc.1260290214
Subject(s) - chemistry , hydroxylamine , monosaccharide , epimer , selectivity , carbon 13 nmr , pyridine , chemical shift , nitrocellulose , proton nmr , two dimensional nuclear magnetic resonance spectroscopy , stereochemistry , organic chemistry , medicinal chemistry , biochemistry , membrane , catalysis
Abstract The previously known method of partial denitration of trinitrocellulose by hydroxylamine in pyridine was further investigated by NMR and applied to trinitroamylose and several other monosaccharide nitrates to study its selectivity. The sites of denitration were determined in each case using 13 C and 15 N NMR and, in most cases, by 2D homo‐ and hetero‐nuclear ( 15 NOC 1 H and 13 C 1 H) chemical shift correlations. The results indicate that denitration of the polysaccharide nitrates is a highly regiospecific reaction occurring at the 2‐position only, whereas with the monosaccharide nitrates denitration takes place with less selectivity, at the 4‐position predominantly, and to a lesser extent at the 3‐position.