Structure elucidation of organic compounds from natural sources using 1D and 2D NMR techniques

2007 ◽  
Vol 834-836 ◽  
pp. 57-73 ◽  
Author(s):  
Gulacti Topcu ◽  
Ayhan Ulubelen
Keyword(s):  
Organic Compounds ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Natural Sources ◽  
Nmr Techniques

ChemInform Abstract: Principles and Applications of Modern 2D NMR Techniques in Structure Elucidation of Complex Natural Products

ChemInform ◽  
2010 ◽  
Vol 23 (42) ◽  
pp. no-no
Author(s):  
ATTA-UR-RAHMAN ATTA-UR-RAHMAN ◽  
M. I. CHOUDHARY ◽  
A. PERVIN
Keyword(s):  
Natural Products ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Nmr Techniques

Structure Elucidation of Three Triterpenoid Saponins from Alphitonia zizyphoides Using 2D Nmr Techniques

1994 ◽  
Vol 57 (2) ◽  
pp. 218-224 ◽  
Author(s):  
Du Li ◽  
Noel L. Owen ◽  
Premila Perera ◽  
Cristina Andersson ◽  
Lars Bohlin ◽  
...  
Keyword(s):  
Structure Elucidation ◽  
2D Nmr ◽  
Triterpenoid Saponins ◽  
Nmr Techniques

The Structure Elucidation and Antimicrobial Activities of Nonsterol Triterpenoids from Ixeris chinensis

2014 ◽  
Vol 69 (9-10) ◽  
pp. 1021-1025 ◽  
Author(s):  
Qing-Hu Wang ◽  
Na-Ren-Chao-Ke-Tu Han ◽  
Na-Yin-Tai Dai ◽  
Xiao-Lan Wu ◽  
Wen-Quan Tai ◽  
...  
Keyword(s):  
Petroleum Ether ◽  
Structure Elucidation ◽  
Petroleum Ether Extract ◽  
2D Nmr ◽  
Antimicrobial Activities ◽  
Spectroscopic Methods ◽  
Ether Extract ◽  
Esi Ms ◽  
Nmr Techniques ◽  
First Time

Abstract An investigation of the petroleum ether extract from Ixeris chinensis Nakai has led to the isolation of a new compound, 3-O-acetyl-22,28-cyclobauer-7-en-3β-ol (1), together with four known compounds which have been isolated from this plant for the first time, namely taraxast-20-en-3β-ol (2), 3-O-acetyl-taraxast-20-en-3β-ol (3), taraxast-20(30)-en-3β-ol (4), and 3-O-acetyl-taraxast-20(30)- en-3β-ol (5). The structures of the isolated compounds have been elucidated on the basis of spectroscopic methods including UV, IR, ESI-MS, 1D NMR, 2D NMR techniques, and by comparison with data reported in the literature. All compounds have been evaluated for their activity against various bacteria and shown to give good results

scholarly journals One New Royleanumoate fromTeucrium royleanumWall. ex Benth

2014 ◽  
Vol 2014 ◽  
pp. 1-3
Author(s):  
Shabir Ahmad ◽  
Riaz Ullah ◽  
Naser M. AbdElsalam ◽  
Hassan Fouad ◽  
Ahtaram Bibi ◽  
...  
Keyword(s):  
Structure Elucidation ◽  
Quantum Coherence ◽  
Multiple Bond ◽  
2D Nmr ◽  
Correlation Spectroscopy ◽  
Multiple Quantum ◽  
Heteronuclear Multiple Bond Correlation ◽  
Heteronuclear Multiple Quantum Coherence ◽  
Nmr Techniques ◽  
Multiple Quantum Coherence

One new royleanumoate, a benzene ester (1), has been isolated fromT. royleanumWall. ex Benth along with two known compounds, namely, 3,4-dihydroxymethyl benzoate (2) and oleanolic acid (3). The structure elucidation of the isolated compounds was established on two-dimensional (2D) NMR techniques including heteronuclear multiple bond correlation (HMBC), heteronuclear multiple quantum Coherence (HMQC), and correlation spectroscopy (COSY) experiment.

Application of 1D and 2D NMR techniques to the structure elucidation of the O-polysaccharide from Proteus mirabilis O: 57

1994 ◽  
Vol 4 (5) ◽  
pp. 615-630 ◽  
Author(s):  
Du?an Uhr�n ◽  
Jean-Robert Brisson ◽  
Leann L. MacLean ◽  
James C. Richards ◽  
Malcolm B. Perry
Keyword(s):  
Proteus Mirabilis ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Nmr Techniques

scholarly journals Precursor-Directed Biosynthesis of Aminofulvenes: New Chalanilines from Endophytic Fungus Chalara sp.

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4418
Author(s):  
Mahsa Khoshbakht ◽  
Jason Srey ◽  
Donovon A. Adpressa ◽  
Annika Jagels ◽  
Sandra Loesgen
Keyword(s):  
Mass Spectrometry ◽  
Structure Elucidation ◽  
Large Scale ◽  
High Resolution Mass Spectrometry ◽  
2D Nmr ◽  
Chemical Diversity ◽  
Epigenetic Modifier ◽  
Nmr Techniques ◽  
Directed Biosynthesis ◽  
Resolution Mass

The plant endophyte Chalara sp. is able to biotransform the epigenetic modifier vorinostat to form unique, aniline-containing polyketides named chalanilines. Here, we sought to expand the chemical diversity of chalaniline A-type molecules by changing the aniline moiety in the precursor vorinostat. In total, twenty-three different vorinostat analogs were prepared via two-step synthesis, and nineteen were incorporated by the fungus into polyketides. The highest yielding substrates were selected for large-scale precursor-directed biosynthesis and five novel compounds, including two fluorinated chalanilines, were isolated, purified, and structurally characterized. Structure elucidation relied on 1D and 2D NMR techniques and was supported by low- and high-resolution mass spectrometry. All compounds were tested for their bioactivity but were not active in antimicrobial or cell viability assays. Aminofulvene-containing natural products are rare, and this high-yielding, precursor-directed process allows for the diversification of this class of compounds.

Thalictricoside, a New Phenolic Compound from Thalictrum orientale

2003 ◽  
Vol 58 (9-10) ◽  
pp. 632-636 ◽  
Author(s):  
F. Zerrin Erdemgil ◽  
Kemal Hüsnü Can Baser ◽  
Pinar Akbay ◽  
Otto Sticher ◽  
Ihsan Çalis
Keyword(s):  
Phenolic Compound ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Nmr Techniques

AbstractFrom the underground parts of Thalictrum orientale Boiss., a new phenolic compound 1 was isolated in addition to one known cyanoglycoside, lithospermoside (2). For the structure elucidation of all compounds, 1D- and 2D-NMR techniques (DEPT, COSY, HMBC, HSQC) and MS (HR-MALDI) were used. The structure of the new compound was established as 2-(4′-hydroxyphenyl)-nitroethane-4′-O-[β-xylopyranosyl-(1→6)-β-glucopyranoside] (1).

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