scholarly journals Assigning regioisomeric or diastereoisomeric relations of problematic trisubstituted double-bonds through heteronuclear 2D selective J-resolved NMR spectroscopy

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37138-37148 ◽  
Author(s):  
Marie Hoffmann ◽  
Solène Miaskiewicz ◽  
Jean-Marc Weibel ◽  
Patrick Pale ◽  
Aurélien Blanc
Keyword(s):  
Nmr Spectroscopy ◽  
Natural Product ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Double Bonds ◽  
Nmr Methods

Although one of the first 2D NMR methods, but so far neglected, selectiveJ-resolved NMR spectroscopy offers a unique opportunity to help organic chemists in structure elucidation, avoiding natural and non-natural product misassignments.

A New Sesquiterpene Lactone Sulfate from Reichardia gaditana (Asteraceae)

2007 ◽  
Vol 62 (1) ◽  
pp. 132-134 ◽  
Author(s):  
Christian Zidorn ◽  
Ernst-Peter Ellmerer ◽  
Werner Heller ◽  
Richard Greil ◽  
Manuela Guggenberger ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
High Resolution ◽  
Structure Elucidation ◽  
Methanolic Extract ◽  
High Resolution Mass Spectrometry ◽  
2D Nmr ◽  
2D Nmr Spectroscopy ◽  
Asteraceae Family ◽  
Resolution Mass

The new sesquiterpenoid 8-deoxy-15-(3′-hydroxy-2′-methyl-propanoyl)-lactucin 3′-sulfate (1) was isolated from the methanolic extract of roots of Reichardia gaditana L. The compound was isolated by silica gel column chromatography (CC) and repeated Sephadex LH-20 CC. Structure elucidation was accomplished by high-resolution mass spectrometry and by 1D- and 2D-NMR spectroscopy. The chemosystematic significance of the new compound is discussed in the context of sesquiterpenoids from other members of the Lactuceae tribe of the Asteraceae family.

3β-(Stearyloxy)olean-12-ene fromAustroplenckia populnea: Structure Elucidation by 2D-NMR and Quantitative13C-NMR Spectroscopy

2003 ◽  
Vol 86 (10) ◽  
pp. 3445-3449 ◽  
Author(s):  
S. A. Vieira Filho ◽  
L. P. Duarte ◽  
G. D. F. Silva ◽  
O. W. Howarth ◽  
I. S. Lula
Keyword(s):  
Nmr Spectroscopy ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Quantitative13c Nmr

3-Oxo-12α-hydroxyfriedelane from Maytenus gonoclada : structure elucidation by 1 H and 13 C chemical shift assignments and 2D-NMR spectroscopy

2007 ◽  
Vol 45 (10) ◽  
pp. 895-898 ◽  
Author(s):  
Mauro Lúcio G. Oliveira ◽  
Lucienir Pains Duarte ◽  
Grácia Divina F. Silva ◽  
Sidney Augusto Vieira Filho ◽  
Vagner Fernandes Knupp ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Shift ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Chemical Shift Assignments ◽  
2D Nmr Spectroscopy

Structure elucidation of a novel group of dithiocarbamate derivatives using 1D and 2D NMR spectroscopy

2006 ◽  
Vol 44 (7) ◽  
pp. 720-723 ◽  
Author(s):  
Qin Li ◽  
Chunhui Yang ◽  
Ze-Mei Ge ◽  
Runtao Li ◽  
Yuxin Cui
Keyword(s):  
Nmr Spectroscopy ◽  
Structure Elucidation ◽  
2D Nmr ◽  
2D Nmr Spectroscopy ◽  
Dithiocarbamate Derivatives

Laciniatoside V: A New Bis-iridoid Glucoside. Isolation and Structure Elucidation by 2D NMR Spectroscopy

1989 ◽  
Vol 52 (1) ◽  
pp. 135-142 ◽  
Author(s):  
Benjamin Podányi ◽  
R. Stephen Reid ◽  
Akos Kocsis ◽  
László Szabó
Keyword(s):  
Nmr Spectroscopy ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Iridoid Glucoside ◽  
2D Nmr Spectroscopy

scholarly journals Iridoids from Globularia dumulosa

2003 ◽  
Vol 58 (3-4) ◽  
pp. 181-186 ◽  
Author(s):  
Hasan Kirmizibekmez ◽  
Pinar Akbay ◽  
Otto Sticher ◽  
İhsan Çalış
Keyword(s):  
Structure Elucidation ◽  
2D Nmr ◽  
Phenylethanoid Glycosides ◽  
Aerial Parts ◽  
Iridoid Glucosides ◽  
Nmr Methods

Two new iridoids, 10-O-benzoylglobularigenin (1) and dumuloside (2) were isolated from the aerial parts of Globularia dumulosa together with seven known iridoid glucosides, davisioside (3), aucubin (4), melampyroside (5), catalpol (6), 10-O-benzoylcatalpol (7), alpinoside (8) and deacetylalpinoside (9). Three phenylethanoid glycosides, verbascoside, decaffeoylverbascoside, leucosceptoside A and three flavone glucosides, pectolinarigenin 7-O-β-ᴅ-glucopyranoside, nepetin 7-O-β-ᴅ-glucopyranoside, demethoxycentaureidin 7-O-β-ᴅ-glucopyranoside were also isolated and characterized. The structure elucidation of the isolated compounds was performed by spectroscopic (UV, IR, HR-MALDIMS, 1D- and 2D NMR) methods.

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