High resolution NMR spectroscopic studies on the metabolism and futile deacetylation of 4-hydroxyacetanilide (paracetamol) in the rat
作者:Andrew W. Nicholls、Stephen Caddick、Ian D. Wilson、R.Duncan Farrant、John.C. Lindon、Jeremy K. Nicholson
DOI:10.1016/0006-2952(95)98513-9
日期:1995.4
There was no significant difference between the level of futiledeacetylation observed for the deuterated and 13C-labelled drug. Overall these data indicate a high level of deacetylation followed by reacetylation (i.e. futiledeacetylation) prior to excretion of paracetamol via the nephrotoxic intermediate 4-aminophenol. The level of deacetylation is much higher than has previously been thought which
Examination of the aspirin acetylation site of human serum albumin by13C NMR spectroscopy
作者:J. T. Gerig、K. E. Katz、J. D. Reinheimer、Glenn R. Sullivan、John D. Roberts
DOI:10.1002/mrc.1270150210
日期:1981.2
AbstractHuman serum albumin has been specifically acetylated using aspirin in which the methyl carbon of the acetyl group was enriched to 90% 13C. A single resonance at 23.13 ppm downfield from tetramethylsilane was observed in 13C differences spectra obtained at both 25.2 and 45.3 MHz. Chemical shift studies of several model compounds suggest that this is the resonance position to be expected for an acetamide group exposed to solvent. The line width observed for the enriched methyl resonance is consistent with free rotation of the methyl group.
BOTTO, ROBERT E., MACROMOLECULES, 21,(1988) N 5, 1246-1250
作者:BOTTO, ROBERT E.
DOI:——
日期:——
Rapid 3D NMR using the filter diagonalization method: application to oligosaccharides derivatized with 13C-labeled acetyl groups
作者:Geoffrey S. Armstrong、Kristin E. Cano、Vladimir A. Mandelshtam、A.J. Shaka、Brad Bendiak
DOI:10.1016/j.jmr.2004.06.002
日期:2004.9
Rapid 3D NMR spectroscopy of oligosaccharides having isotopically labeled acetyl "isotags" was made possible with high resolution in the indirect dimensions using the filter diagonalization method (FDM). A pulse sequence was designed for the optimal correlation of acetyl methyl protons, methyl carbons, and carbonyl carbons. The multi-dimensional nature of the FDM, coupled with the advantages of constant-time evolution periods, resulted in marked improvements over Fourier transform (FT) and mirror-image linear prediction (MI-LP) processing methods. The three methods were directly compared using identical data sets. A highly resolved 3D spectrum was achieved with the FDM using a very short experimental time (28 min). (C) 2004 Elsevier Inc. All rights reserved.