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Structural elucidation of a new sesquiterpene alcohol by comparative NMR Studies
(ACG Publications, 2020)
Complete assignments 1H and13C NMR spectral data of four anabaseine derivatives
(2006)
The anabaseine derivatives 6-methoxy-7-hydroxy-1-(pyridin-3-yl)-3,4- dihydroisoquinoline, 6,7-dimethoxy-1-(pyridin-3-yl)-1,2,3,4- tetrahydroisoqumoline and 6,7-dimethoxy-1-(piperidin-3-yl)-1,2,3,4- tetrahydroisoquinoline ...
Synthesis and total assignment of H-1 and C-13 NMR spectra of new oxoisoaporphines by long-range heteronuclear correlations
(JOHN WILEY & SONS LTD, 2005-12)
The new oxoisoaporphines 7H-dibenzo[deh]quinolin-7-one, 5-methoxy-7H-dibenzo[deh]quinolin-7-one, 5-methoxy-6-hydroxy-7H-dibenzo[de,h]quinolin-7-one, 5-hydroxy-7H-dibenzo[de,h]quinolin-7-one and 5-methoxy-6H-dibenzo[de,h] ...
Detailed H-1 and C-13 NMR structural assignment and relative stereochemistry determination for three closely related sesquiterpene lactones
(JOHN WILEY & SONS LTD, 2008)
A complete analysis of H-1 and C-13 NMR spectra of the trypanocidal sesquiterpene lactone eremantholide C and two of its analogues is described. These structurally similar sesquiterpene lactones were submitted to H-1 NMR, ...
LTA-mediated synthesis and complete assignment of H-1 and C-13 NMR data of two natural 11-nordrimanes: isonordrimenone and polygonone
(WILEY, 2007)
Two naturally occurring 11-nordrimanes were synthesized, and their H-1 and C-13 NMR spectra were unambiguously assigned in full for the first time. Copyright (c) 2007 John Wiley & Sons, Ltd.
13C CP-MAS NMR of azacycle-thiourea inclusion compounds
(Taylor and Francis, 1998)
13C CP-MAS NMR spectra of thiourea host-guest inclusion compounds containing amines, 1-azabicyclo[2.2.2]octane, 1,4-diazabicyclo[2.2.2]octane, 3-azabicyclo[3.2.2]nonane and 1, 3, 5, 7 tetrazadamantane at 25°C are reported. ...
Automatic identification by C-13 NMR of substituent groups bonded in natural product skeletons
(Elsevier B.V., 2002-11-01)
The aim of this paper is to present a procedure that utilizes C-13 NMR for identification of substituent groups which are bonded to carbon skeletons of natural products. For so much was developed a new version of the program ...
Theoretical studies of 13C carbon-NMR and vibrational (IR and Raman) Spectroscopies of Mefenamic Acid Polymorphs.
(Instituto de Física da Universidade de São Paulo.São Paulo, 2014-05-21)
The two polymorphs of mefenamic acid (MEF) or 2-[(2,3-
(dimethylphenyl)amino] benzoic acid polymorphs (known as I and 11 forms)
were studied in the framework of density functional theory (DFn. The DFT
calculations were ...
Assessment of macadamia kernel quality defects by means of near infrared spectroscopy (NIRS) and nuclear magnetic resonance (NMR)
(2019-12-01)
Macadamia kernels are visually sorted based on the presence of quality defects by specialized labors. However, this process is not as accurate as non-destructive methods such as near infrared spectroscopy (NIRS) and nuclear ...
Molecular structure, experimental and theoretical 1H and 13C NMR chemical shift assignment of cyclic and acyclic α,β-unsaturated esters
(John Wiley & Sons Ltd, 2014-01)
The experimental 1H and 13C NMR spectra of 13 phenyl cinnamates and four 4-methylcoumarins were investigated and their chemical shifts assigned on the basis of the two-dimensional spectra. For the unsubstituted cinnamic ...