A new eudesmane sesquiterpene from Senecio cannabifolius

2009 ◽  
Vol 2009 (7) ◽  
pp. 457-458 ◽  
Author(s):  
Xue Gao ◽  
Xiaohong Deng
Keyword(s):  
Nmr Spectroscopy ◽  
Spectroscopic Data ◽  
2D Nmr ◽  
2D Nmr Spectroscopy ◽  
Esi Ms

A new eudesmane sesquiterpene was isolated from the roots of Senecio cannabifolius. Its structure was established as 1-oxo-5α, 7αH-eudesma-3-en-15-al on the basis of spectroscopic data, including IR, EI-MS, HR-ESI-MS, 1D and 2D NMR spectroscopy.

scholarly journals Comparative Study of Naphthoquinone Contents of Selected Greek Endemic Boraginaceae Plants - Antimicrobial Activities

2017 ◽  
Vol 12 (2) ◽  
pp. 1934578X1701200
Author(s):  
Teisa Tufa ◽  
Harilaos Damianakos ◽  
Konstantia Graikou ◽  
Ioanna Chinou
Keyword(s):  
Antimicrobial Activity ◽  
Nmr Spectroscopy ◽  
Comparative Study ◽  
Pathogenic Fungi ◽  
2D Nmr ◽  
Antimicrobial Activities ◽  
2D Nmr Spectroscopy ◽  
Chromatographic Separations ◽  
Esi Ms ◽  
Related Compounds

The cyclohexane (Ch) extracts of the roots of five Greek endemic Boraginaceae plants, Onosma kaheirei Teppner, O. graeca Boiss., O. erecta Sibth. & Sm., Alkanna sfikasiana Kit Tan, Vold and Strid and Cynoglossum columnae Ten, were investigated for the presence of alkannin/shikonin-related compounds. All species, s except C. columnae and O. erecta, were found to contain this type of compounds. Seven compounds were obtained after several chromatographic separations from the Ch extracts of the investigated plants: deoxyalkannin (1), 2″-( S)- α-methylbutyrylalkannin (2), isobutyrylalkannin (3), propionylalkannin (4), acetylalkannin (5), β-hydroxyisovalerylalkannin (6), and β,β-dimethylacrylalkannin (7). All structures were identified by 1D 1H-/13C- and 2D NMR spectroscopy, assisted also by ESI-MS. The extracts and the isolated compounds exhibiting an interesting antimicrobial profile when evaluated for their antimicrobial activity against six Gram-positive and -negative bacteria and three human pathogenic fungi.

scholarly journals Guaiane Sesquiterpenoids from Jatropha curcas

2008 ◽  
Vol 3 (10) ◽  
pp. 1934578X0800301
Author(s):  
Xia-Chang Wang ◽  
Shi-Ping Ma ◽  
Jing-Han Liu ◽  
Li-Hong Hu
Keyword(s):  
Nmr Spectroscopy ◽  
Spectral Data ◽  
Jatropha Curcas ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
X Ray Diffraction ◽  
2D Nmr Spectroscopy ◽  
X Ray ◽  
Esi Ms ◽  
Related Compounds

Two new guaiane sesquiterpenoids named jatrophaols A and B (1, 2), along with three known analogues, were isolated from the roots of Jatropha curcas. Their structures were determined by spectroscopic methods, including 1D and 2D NMR spectroscopy, HR-EI-MS, HR-ESI-MS, and X-ray diffraction, as well as by comparison of their spectral data with those of related compounds.

scholarly journals New Rocaglamide Derivatives from Vietnamese Aglaia species

2014 ◽  
Vol 9 (6) ◽  
pp. 1934578X1400900
Author(s):  
Ngoc Tu Duong ◽  
RuAngelie Edrada-Ebel ◽  
Rainer Ebel ◽  
Wenhan Lin ◽  
Anh Tuan Duong ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Insecticidal Activity ◽  
Spodoptera Littoralis ◽  
2D Nmr ◽  
Mass Spectrometric ◽  
Phytochemical Analysis ◽  
2D Nmr Spectroscopy ◽  
Esi Ms

Phytochemical analysis of the leaves of different Aglaia species collected in Vietnam yielded eight rocaglamide derivatives, which are responsible for the strong insecticidal activity against Spodoptera littoralis, including rocaglamide A (1), rocaglamide I (2), rocaglamide W (3), rocaglamide AB (4), rocaglamide J (5), rocaglaol (6), rocaglamide S (7) and the new rocaglamide AY (8). The structures of these compounds were elucidated through extensive 1D and 2D NMR spectroscopy and analysis of their mass spectrometric (ESI-MS) and HRESIMS data.

scholarly journals Structures of cell-wall glycopolymers of Lactococcus lactis BIM B-1024

2017 ◽  
Vol 1 (1) ◽  
pp. 41-45
Author(s):  
Evelina Leont’evna Zdorovenko ◽  
Alexander Stepanovich Shashkov ◽  
Alexandra Alexeevna Kadykova ◽  
Artem Nikolaevich Fakhrutdinov ◽  
Elena Pavlovna Kiseleva ◽  
...  
Keyword(s):  
Cell Wall ◽  
Nmr Spectroscopy ◽  
Anion Exchange ◽  
Lactococcus Lactis ◽  
2D Nmr ◽  
Lactobacillus Species ◽  
Gel Chromatography ◽  
2D Nmr Spectroscopy ◽  
Sugar Analysis ◽  
Esi Ms

Abstract Glycopolymers of two types were isolated from the cell wall of Lactococcus lactis BIM B-1024 by stepwise extraction with cold and hot 10% CCl3CO2H and separated by anion-exchange gel chromatography. The following structures of the glycopolymers were established by sugar analysis, dephosphorylation with 48% HF, 1D and 2D NMR spectroscopy, and ESI-MS: β-D-Galp-(1→4)-β-D-Glcp-(1→6)┐ →4)-β-D-Galp-(1→4)-β-D-Glcp-(1→4)-α-D-Glcp-(1→ PSI β-D-Glcp-(1→3)┐ →60-α-D-GalpNAc-(1→3)-β-D-GalpNAc-(1→5)-Rib-ol-1-P-(O→ PSII β-D-Glcp-(1→4)┘ Polysaccharides with the same or similar structures to PSI have been found earlier in various Lactobacillus species, whereas, to our knowledge, the structure of PSII is new.

A New Norditerpenoid Alkaloid from Delphinium Densiflorum

2009 ◽  
Vol 2009 (5) ◽  
pp. 306-307 ◽  
Author(s):  
Jian-Yun Sun ◽  
Tian-Cheng Li
Keyword(s):  
Nmr Spectroscopy ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
2D Nmr Spectroscopy ◽  
Esi Ms ◽  
Etoh Extract ◽  
Norditerpenoid Alkaloid ◽  
Whole Plants

A new norditerpenoid alkaloid delphidenine was isolated from the EtOH extract of the whole plants of Delphinium densiflorum. Its structure was established by extensive application of spectroscopic methods, including IR, HR-ESI-MS, 1D and 2D NMR spectroscopy.

Demonstration of 2D NMR Spectroscopy in a Powered Magnet at 25 T Using Cascade Field Regulation

2019 ◽  
Author(s):  
Benjamin D. McPheron ◽  
Jeffrey L. Schiano ◽  
Brian F. Thomson ◽  
Kiran K. Shetty ◽  
William W. Brey
Keyword(s):  
Nmr Spectroscopy ◽  
2D Nmr ◽  
2D Nmr Spectroscopy

scholarly journals Ambient-Temperature Synthesis of (E)-N-(3-(tert-Butyl)-1-methyl-1H-pyrazol-5-yl)-1-(pyridin-2-yl)methanimine

Molbank ◽  
10.3390/m1250 ◽  
2021 ◽  
Vol 2021 (3) ◽  
pp. M1250
Author(s):  
Diana Becerra ◽  
Justo Cobo ◽  
Juan-Carlos Castillo
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Ambient Temperature ◽  
Magnesium Sulfate ◽  
Elemental Analysis ◽  
Condensation Reaction ◽  
2D Nmr ◽  
2D Nmr Spectroscopy ◽  
Temperature Synthesis ◽  
Tert Butyl

We report the ambient-temperature synthesis of novel (E)-N-(3-(tert-butyl)-1-methyl-1H-pyrazol-5-yl)-1-(pyridin-2-yl)methanamine 3 in 81% yield by a condensation reaction between 3-(tert-butyl)-1-methyl-1H-pyrazol-5-amine 1 and 2-pyridinecarboxaldehyde 2 in methanol using magnesium sulfate as a drying agent. The N-pyrazolyl imine 3 was full characterized by IR, 1D, and 2D NMR spectroscopy, mass spectrometry, and elemental analysis.

Highly NIR-emitting ytterbium complexes containing 2-(tosylaminobenzylidene)-N-benzoylhydrazone anions: structure in solution and use for bioimaging

2021 ◽  
Author(s):  
Anton D Kovalenko ◽  
Alexander A. Pavlov ◽  
Ilya D. Ustinovich ◽  
Alena S. Kalyakina ◽  
Alexander S Goloveshkin ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Lanthanide Complexes ◽  
2D Nmr ◽  
2D Nmr Spectroscopy ◽  
Ytterbium Complexes ◽  
Solution Behaviour ◽  
Structure In Solution

Abstract: Solution behaviour in DMSO using 1D and 2D NMR spectroscopy was performed for lanthanide complexes Ln(L)(HL) and Ln(HL)2Cl, containing non-macrocyclic 2-(tosylamino)-benzylidene-N-benzoylhydrazone (H2L), and the structure of [Yb(L)]+ cation in...

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