The Chemical Composition of Bitumen in Pyrolyzed Green River Oil Shale: Characterization by 13C NMR Spectroscopy

2013 ◽  
Vol 27 (12) ◽  
pp. 7314-7323 ◽  
Author(s):  
Yesu Feng ◽  
Tuong Van Le Doan ◽  
Andrew E. Pomerantz
Keyword(s):  
Chemical Composition ◽  
Nmr Spectroscopy ◽  
13C Nmr ◽  
Oil Shale ◽  
13C Nmr Spectroscopy ◽  
Green River

scholarly journals Combined Analysis by GC (RI), GC/MS and 13C NMR Spectroscopy of Elsholtzia blanda, E. penduliflora and E. winitiana Essential Oils

2007 ◽  
Vol 2 (8) ◽  
pp. 1934578X0700200 ◽  
Author(s):  
Dominique Lesueur ◽  
Ange Bighelli ◽  
Nguyen Thi Tam ◽  
Nguyen Viet Than ◽  
Pham thi Kim Dung ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Nmr Spectroscopy ◽  
Essential Oil ◽  
Essential Oils ◽  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
Retention Indices ◽  
Aerial Parts ◽  
Two Samples ◽  
C Nmr

The chemical composition of six oil samples, isolated from aerial parts of Elsholtzia blanda, E. penduliflora and E. winitiana, harvested in two provinces of Vietnam, was investigated by GC, in combination with retention indices (RI), GC/MS and 13C NMR spectroscopy. Linalool was the major component (75.2 and 56.8%) of the two samples of E. blanda essential oil, whereas the two oil samples from E. penduliflora were dominated by 1,8-cineole (62.7 and 65.5%). Conversely, the two oil samples of E. winitiana exhibited different compositions, rosefuran (56.0%) and dehydroelsholtzia ketone (22.8%) being the major components of one sample, whilst the second sample was dominated by elsholtzia ketone (87.5%).

scholarly journals Chemical Composition of the Essential Oil from Corsican Mentha aquatica - Combined Analysis by GC(RI), GC-MS and 13C NMR Spectroscopy

2011 ◽  
Vol 6 (10) ◽  
pp. 1934578X1100601 ◽  
Author(s):  
Sylvain Sutour ◽  
Félix Tomi ◽  
Pascale Bradesi ◽  
Joseph Casanova
Keyword(s):  
Chemical Composition ◽  
Nmr Spectroscopy ◽  
Essential Oil ◽  
Silica Gel ◽  
Column Chromatography ◽  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
Combined Analysis ◽  
Mentha Aquatica ◽  
C Nmr

The essential oil (EO) of M. aquatica L. growing wild in Corsica was isolated by dry vapor distillation and submitted to combined analysis by column chromatography over silica gel, GC(RI), GC-MS and 13C NMR spectroscopy. The composition was dominated by oxygenated monoterpenes and characterized by the occurrence of menthofuran (50.7%) as the major component. In parallel, seven laboratory-distilled oil samples isolated from individual plants collected in Corsica were analyzed by GC(RI) and 13C NMR spectroscopy. Only quantitative differences were observed between the samples. Beside the usual terpenes, various p-menthane lactones (mintlactone, isomintlactone, hydroxymintlactone, menthofurolactone and epimenthofurolactone) have been identified in all the oil samples.

scholarly journals (2S,3R,6R)-2-[(R)-1-Hydroxyallyl]-4,4-dimethoxy-6-methyltetrahydro-2H-pyran-3-ol

Molbank ◽  
10.3390/m1140 ◽  
2020 ◽  
Vol 2020 (2) ◽  
pp. M1140
Author(s):  
Jack Bennett ◽  
Paul Murphy
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
13C Nmr ◽  
Conjugate Addition ◽  
13C Nmr Spectroscopy ◽  
One Pot ◽  
1H And 13C Nmr ◽  
Esi Mass Spectrometry ◽  
The One

(2S,3R,6R)-2-[(R)-1-Hydroxyallyl]-4,4-dimethoxy-6-methyltetrahydro-2H-pyran-3-ol was isolated in 18% after treating the glucose derived (5R,6S,7R)-5,6,7-tris[(triethylsilyl)oxy]nona-1,8-dien-4-one with (1S)-(+)-10-camphorsulfonic acid (CSA). The one-pot formation of the title compound involved triethylsilyl (TES) removal, alkene isomerization, intramolecular conjugate addition and ketal formation. The compound was characterized by 1H and 13C NMR spectroscopy, ESI mass spectrometry and IR spectroscopy. NMR spectroscopy was used to establish the product structure, including the conformation of its tetrahydropyran ring.

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